From d8db5299fae13a5ef321fd8f7be7364d735fecbb Mon Sep 17 00:00:00 2001
From: David Wood <david@davidtw.co>
Date: Wed, 17 Oct 2018 00:47:28 +0200
Subject: [PATCH 1/3] Don't buffer lints.

When lints are emitted from the AST borrow checker, they do not signal
an error as it is not known at that time whether, due to attributes,
that lint will error or warn. This means that when lints are buffered
in the MIR they will always be downgraded, as the AST borrowck will not
have been marked as having errored, even if a lint was upgraded to
an error after being emitted from the AST borrowck. The simple solution
to this is to not buffer any lints from the MIR borrowck.
---
 src/librustc_mir/borrow_check/mod.rs | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/librustc_mir/borrow_check/mod.rs b/src/librustc_mir/borrow_check/mod.rs
index 9cbaf35acd33f..fe80447e4a84f 100644
--- a/src/librustc_mir/borrow_check/mod.rs
+++ b/src/librustc_mir/borrow_check/mod.rs
@@ -321,20 +321,20 @@ fn do_mir_borrowck<'a, 'gcx, 'tcx>(
                 continue;
             }
 
-            let mut err = tcx.struct_span_lint_node(
+            let mut_span = tcx.sess.source_map().span_until_non_whitespace(span);
+            tcx.struct_span_lint_node(
                 UNUSED_MUT,
                 vsi[local_decl.source_info.scope].lint_root,
                 span,
                 "variable does not need to be mutable",
-            );
-            let mut_span = tcx.sess.source_map().span_until_non_whitespace(span);
-            err.span_suggestion_short_with_applicability(
+            )
+            .span_suggestion_short_with_applicability(
                 mut_span,
                 "remove this `mut`",
                 String::new(),
-                Applicability::MachineApplicable);
-
-            err.buffer(&mut mbcx.errors_buffer);
+                Applicability::MachineApplicable,
+            )
+            .emit();
         }
     }
 

From 8b34881e972906545d030318006478c1986fa0aa Mon Sep 17 00:00:00 2001
From: David Wood <david@davidtw.co>
Date: Wed, 17 Oct 2018 00:51:05 +0200
Subject: [PATCH 2/3] Change NLL compare mode to borrowck=migrate.

This commit changes the NLL compare mode to pass `-Z borrowck=migrate`
rather than `-Z borrowck=nll` to better test what will be deployed. It
does not include the test output updates, as separation of these commits
makes reviewing simpler.
---
 src/tools/compiletest/src/runtest.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tools/compiletest/src/runtest.rs b/src/tools/compiletest/src/runtest.rs
index 4cb6f6b83bdd1..c69956030c0b3 100644
--- a/src/tools/compiletest/src/runtest.rs
+++ b/src/tools/compiletest/src/runtest.rs
@@ -1810,7 +1810,7 @@ impl<'test> TestCx<'test> {
 
         match self.config.compare_mode {
             Some(CompareMode::Nll) => {
-                rustc.args(&["-Zborrowck=mir", "-Ztwo-phase-borrows"]);
+                rustc.args(&["-Zborrowck=migrate", "-Ztwo-phase-borrows"]);
             }
             Some(CompareMode::Polonius) => {
                 rustc.args(&["-Zpolonius", "-Zborrowck=mir", "-Ztwo-phase-borrows"]);

From 539404b77d1e443793c653ae03b207c62b3b1ae0 Mon Sep 17 00:00:00 2001
From: David Wood <david@davidtw.co>
Date: Wed, 17 Oct 2018 00:57:32 +0200
Subject: [PATCH 3/3] Update output for borrowck=migrate compare mode.

This commit updates the test output for the updated NLL compare mode
that uses `-Z borrowck=migrate` rather than `-Z borrowck=mir`. The
previous commit changes `compiletest` and this commit only updates
`.nll.stderr` files.
---
 .../ui/access-mode-in-closures.nll.stderr     |  14 ++-
 ...es-project-from-hrtb-in-fn-body.nll.stderr |  24 ----
 .../associated-types-subtyping-1.nll.stderr   |  24 ----
 ...fn-ret-contravariant.krisskross.nll.stderr |  24 ----
 ...-fn-ret-contravariant.transmute.nll.stderr |  20 ----
 ...ect-fn-ret-invariant.krisskross.nll.stderr |  24 ----
 ...project-fn-ret-invariant.oneuse.nll.stderr |  24 ----
 ...ject-fn-ret-invariant.transmute.nll.stderr |  22 ----
 .../ui/binop/binop-move-semantics.nll.stderr  |  14 ++-
 .../borrowck-closures-unique.nll.stderr       |   8 +-
 .../borrowck-describe-lvalue.ast.nll.stderr   |  19 +++-
 .../borrowck-fn-in-const-a.ast.nll.stderr     |  20 ++++
 ...or-loop-correct-cmt-for-pattern.nll.stderr |  32 +++++-
 .../ui/borrowck/borrowck-in-static.nll.stderr |  17 ++-
 .../borrowck/borrowck-issue-2657-2.nll.stderr |  13 ++-
 .../borrowck-move-error-with-note.nll.stderr  |  50 ++++++++-
 .../borrowck-move-from-unsafe-ptr.nll.stderr  |  13 ++-
 ...orrowck-move-in-irrefut-pat.ast.nll.stderr |  29 ++++-
 ...ut-of-overloaded-auto-deref.ast.nll.stderr |  11 +-
 ...ck-move-out-of-overloaded-deref.nll.stderr |  11 +-
 ...wck-move-out-of-static-item.ast.nll.stderr |  18 +++
 .../borrowck-move-out-of-vec-tail.nll.stderr  |  29 ++++-
 ...-overloaded-index-move-from-vec.nll.stderr |  11 +-
 ...orrow-from-shorter-lived-andmut.nll.stderr |  12 --
 src/test/ui/borrowck/issue-51415.nll.stderr   |  11 +-
 src/test/ui/borrowck/issue-7573.nll.stderr    |  14 ---
 ...tic-initializer-issue-38520.ast.nll.stderr |  33 ++++++
 .../ui/borrowck/mutability-errors.nll.stderr  |  26 ++++-
 .../regions-escape-bound-fn-2.nll.stderr      |  12 --
 .../regions-escape-bound-fn.nll.stderr        |  12 --
 .../regions-escape-unboxed-closure.nll.stderr |  12 --
 ...upvar-from-non-once-ref-closure.nll.stderr |  21 +++-
 .../ui/by-move-pattern-binding.nll.stderr     |  11 +-
 ...check-static-values-constraints.nll.stderr |  11 +-
 .../expect-fn-supply-fn.nll.stderr            |  54 ---------
 ...ds-static-cant-capture-borrowed.nll.stderr |  29 -----
 .../expect-region-supply-region.nll.stderr    |  34 ------
 .../min_const_fn/min_const_fn.nll.stderr      |   7 +-
 .../min_const_fn/min_const_fn_dyn.nll.stderr  |   7 +-
 src/test/ui/dst/dst-index.nll.stderr          |  20 +++-
 src/test/ui/dst/dst-rvalue.nll.stderr         |  22 +++-
 src/test/ui/error-codes/E0507.nll.stderr      |  18 +++
 ...1-does-not-trigger-for-closures.nll.stderr |  11 --
 ..._type_does_not_live_long_enough.nll.stderr |  12 --
 ...ubtype.free_inv_x_vs_free_inv_y.nll.stderr |  30 -----
 .../hr-subtype.free_x_vs_free_y.nll.stderr    |  16 ---
 .../dyn-trait.nll.stderr                      |  10 --
 ...t_outlive_least_region_or_bound.nll.stderr |  49 --------
 .../static-return-lifetime-infered.nll.stderr |  26 -----
 .../type_parameters_captured.nll.stderr       |  11 --
 .../in-band-lifetimes/mismatched.nll.stderr   |  20 ----
 src/test/ui/issues/issue-10291.nll.stderr     |  11 --
 src/test/ui/issues/issue-12567.nll.stderr     |  41 ++++++-
 src/test/ui/issues/issue-13058.nll.stderr     |  12 --
 src/test/ui/issues/issue-15034.nll.stderr     |  11 --
 src/test/ui/issues/issue-16683.nll.stderr     |  10 --
 .../issues/issue-17718-static-move.nll.stderr |  11 +-
 src/test/ui/issues/issue-17728.nll.stderr     |  19 ----
 src/test/ui/issues/issue-17758.nll.stderr     |  10 --
 src/test/ui/issues/issue-20801.nll.stderr     |  20 +++-
 src/test/ui/issues/issue-2590.nll.stderr      |  13 ++-
 src/test/ui/issues/issue-26217.nll.stderr     |   9 --
 src/test/ui/issues/issue-30355.nll.stderr     |  13 ++-
 src/test/ui/issues/issue-40288-2.nll.stderr   |  21 ----
 .../issue-40402-1.nll.stderr                  |  11 +-
 .../issue-40402-2.nll.stderr                  |  20 +++-
 src/test/ui/issues/issue-40510-1.nll.stderr   |  11 +-
 src/test/ui/issues/issue-40510-3.nll.stderr   |  11 +-
 src/test/ui/issues/issue-4335.nll.stderr      |  11 +-
 src/test/ui/issues/issue-49824.nll.stderr     |  17 ++-
 src/test/ui/issues/issue-52213.nll.stderr     |  13 ---
 src/test/ui/issues/issue-52533-1.nll.stderr   |  11 --
 src/test/ui/issues/issue-52533.nll.stderr     |  11 --
 .../kindck/kindck-impl-type-params.nll.stderr |  63 -----------
 .../ui/kindck/kindck-send-object1.nll.stderr  |  32 ------
 ...etime-bound-will-change-warning.nll.stderr |  20 ----
 ...xisting-name-if-else-using-impl.nll.stderr |  13 ---
 ...isting-name-return-type-is-anon.nll.stderr |  13 ---
 ...-one-existing-name-self-is-anon.nll.stderr |  13 ---
 .../ex2a-push-one-existing-name-2.nll.stderr  |  11 --
 ...h-one-existing-name-early-bound.nll.stderr |  12 --
 .../ex2a-push-one-existing-name.nll.stderr    |  11 --
 .../ex2b-push-no-existing-names.nll.stderr    |  12 --
 .../ex2c-push-inference-variable.nll.stderr   |  13 ---
 .../ex2d-push-inference-variable-2.nll.stderr |  13 ---
 .../ex2e-push-inference-variable-3.nll.stderr |  13 ---
 .../ex3-both-anon-regions-2.nll.stderr        |  12 --
 .../ex3-both-anon-regions-3.nll.stderr        |  22 ----
 ...anon-regions-both-are-structs-2.nll.stderr |  12 --
 ...anon-regions-both-are-structs-3.nll.stderr |  13 ---
 ...-are-structs-earlybound-regions.nll.stderr |  13 ---
 ...h-are-structs-latebound-regions.nll.stderr |  12 --
 ...h-anon-regions-both-are-structs.nll.stderr |  12 --
 ...-anon-regions-latebound-regions.nll.stderr |  12 --
 ...th-anon-regions-one-is-struct-2.nll.stderr |  21 ----
 ...th-anon-regions-one-is-struct-3.nll.stderr |  12 --
 ...th-anon-regions-one-is-struct-4.nll.stderr |  12 --
 ...both-anon-regions-one-is-struct.nll.stderr |  12 --
 ...non-regions-return-type-is-anon.nll.stderr |  12 --
 ...-both-anon-regions-self-is-anon.nll.stderr |  12 --
 ...oth-anon-regions-using-fn-items.nll.stderr |  21 ----
 ...h-anon-regions-using-impl-items.nll.stderr |  12 --
 ...non-regions-using-trait-objects.nll.stderr |  21 ----
 .../ex3-both-anon-regions.nll.stderr          |  12 --
 src/test/ui/lub-if.nll.stderr                 |  20 ----
 src/test/ui/lub-match.nll.stderr              |  20 ----
 .../match/match-ref-mut-invariance.nll.stderr |  12 --
 .../match-ref-mut-let-invariance.nll.stderr   |  13 ---
 .../moves-based-on-type-block-bad.nll.stderr  |  14 ++-
 ...e-out-of-closure-env-issue-1965.nll.stderr |  17 ++-
 .../ui/nll/cannot-move-block-spans.nll.stderr |  72 +++++++++++-
 .../match-guards-always-borrow.ast.nll.stderr |  30 ++++-
 ...where-clause-env-wrong-lifetime.nll.stderr |  11 --
 ...object-lifetime-default-elision.nll.stderr |  13 ---
 ...lifetime-default-from-box-error.nll.stderr |  28 -----
 ...ime-default-from-rptr-box-error.nll.stderr |  10 --
 ...-default-from-rptr-struct-error.nll.stderr |  10 --
 .../object-lifetime-default-mybox.nll.stderr  |  21 ----
 ...nvariant-static-error-reporting.nll.stderr |  11 --
 ...time-bounds-on-fns-where-clause.nll.stderr |  12 --
 ...time-bounds-on-fns-where-clause.nll.stderr |  12 --
 .../region-object-lifetime-2.nll.stderr       |  12 --
 .../region-object-lifetime-4.nll.stderr       |  12 --
 ...ion-object-lifetime-in-coercion.nll.stderr |  38 -------
 .../regions/regions-addr-of-self.nll.stderr   |  10 --
 .../regions-addr-of-upvar-self.nll.stderr     |  47 --------
 ...n-supertrait-outlives-container.nll.stderr |  13 ---
 ...unded-by-trait-requiring-static.nll.stderr |  50 ---------
 ...hod-type-parameters-cross-crate.nll.stderr |  13 ---
 ...hod-type-parameters-trait-bound.nll.stderr |  13 ---
 ...-bounded-method-type-parameters.nll.stderr |  19 ----
 src/test/ui/regions/regions-bounds.nll.stderr |  22 ----
 ...ose-associated-type-into-object.nll.stderr |  36 ------
 ...ions-close-object-into-object-2.nll.stderr |  21 ----
 ...ions-close-object-into-object-4.nll.stderr |  38 -------
 ...ions-close-object-into-object-5.nll.stderr |  31 -----
 ...ons-close-over-type-parameter-1.nll.stderr |  20 ----
 ...se-over-type-parameter-multiple.nll.stderr |  11 --
 ...regions-close-param-into-object.nll.stderr |  36 ------
 .../regions-creating-enums3.nll.stderr        |  12 --
 .../regions-creating-enums4.nll.stderr        |  12 --
 ...egions-early-bound-error-method.nll.stderr |  12 --
 .../regions-early-bound-error.nll.stderr      |  12 --
 .../regions/regions-escape-method.nll.stderr  |  11 --
 ...regions-escape-via-trait-or-not.nll.stderr |  11 --
 ...ons-free-region-ordering-callee.nll.stderr |  24 ----
 ...ons-free-region-ordering-caller.nll.stderr |  33 ------
 ...-free-region-ordering-incorrect.nll.stderr |  15 ---
 ...implied-bounds-projection-gap-1.nll.stderr |  11 --
 ...ons-infer-bound-from-trait-self.nll.stderr |  11 --
 .../regions-infer-bound-from-trait.nll.stderr |  19 ----
 .../regions/regions-infer-call-3.nll.stderr   |  11 --
 ...nfer-contravariance-due-to-decl.nll.stderr |  13 ---
 ...ns-infer-covariance-due-to-decl.nll.stderr |  13 ---
 ...ns-infer-invariance-due-to-decl.nll.stderr |  10 --
 ...-invariance-due-to-mutability-3.nll.stderr |  10 --
 ...-invariance-due-to-mutability-4.nll.stderr |  10 --
 .../regions-infer-not-param.nll.stderr        |  26 -----
 .../regions-infer-paramd-indirect.nll.stderr  |  13 ---
 .../regions-lifetime-bounds-on-fns.nll.stderr |  12 --
 .../ui/regions/regions-nested-fns.nll.stderr  |  49 --------
 ...lives-projection-container-hrtb.nll.stderr |   9 --
 ...utlives-projection-container-wc.nll.stderr |  13 ---
 ...s-outlives-projection-container.nll.stderr |  46 --------
 ...ow-from-shorter-mut-ref-mut-ref.nll.stderr |  12 --
 ...s-reborrow-from-shorter-mut-ref.nll.stderr |  12 --
 .../regions/regions-ret-borrowed-1.nll.stderr |  11 --
 .../regions/regions-ret-borrowed.nll.stderr   |  11 --
 ...return-ref-to-upvar-issue-17403.nll.stderr |  13 ---
 .../regions-static-bound.ll.nll.stderr        |  49 --------
 .../regions-trait-object-subtyping.nll.stderr |  24 ----
 ...se-covariant-in-second-position.nll.stderr |  13 ---
 ...nce-contravariant-use-covariant.nll.stderr |  13 ---
 ...nce-covariant-use-contravariant.nll.stderr |  13 ---
 ...nce-invariant-use-contravariant.nll.stderr |  13 ---
 ...ariance-invariant-use-covariant.nll.stderr |  11 --
 .../static/static-items-cant-move.nll.stderr  |  18 +++
 src/test/ui/std-uncopyable-atomics.nll.stderr |  38 ++++++-
 src/test/ui/thread-local-in-ctfe.nll.stderr   |  14 ++-
 .../trivial-bounds-leak-copy.nll.stderr       |  20 ++++
 .../unboxed-closure-illegal-move.nll.stderr   |  32 +++++-
 ...boxed-closure-immutable-capture.nll.stderr |  26 ++++-
 ...ument-types-two-region-pointers.nll.stderr |  12 --
 ...nfer-fnmut-calling-fnmut-no-mut.nll.stderr |   8 +-
 .../unboxed-closures-mutate-upvar.nll.stderr  |   8 +-
 .../dyn-trait-underscore.nll.stderr           |  11 --
 ...rscore-lifetime-elison-mismatch.nll.stderr |  11 --
 src/test/ui/unop-move-semantics.nll.stderr    |  14 ++-
 .../variance-btree-invariant-types.nll.stderr | 106 ------------------
 .../variance-cell-is-invariant.nll.stderr     |  13 ---
 ...riance-contravariant-arg-object.nll.stderr |  24 ----
 ...e-contravariant-arg-trait-match.nll.stderr |  24 ----
 ...-contravariant-self-trait-match.nll.stderr |  24 ----
 .../variance-covariant-arg-object.nll.stderr  |  24 ----
 ...iance-covariant-arg-trait-match.nll.stderr |  24 ----
 ...ance-covariant-self-trait-match.nll.stderr |  24 ----
 .../variance-invariant-arg-object.nll.stderr  |  24 ----
 ...iance-invariant-arg-trait-match.nll.stderr |  24 ----
 ...ance-invariant-self-trait-match.nll.stderr |  24 ----
 .../variance-trait-matching.nll.stderr        |  12 --
 ...ance-use-contravariant-struct-1.nll.stderr |  13 ---
 ...variance-use-covariant-struct-1.nll.stderr |  13 ---
 ...variance-use-invariant-struct-1.nll.stderr |  24 ----
 src/test/ui/wf/wf-static-method.nll.stderr    |  55 ---------
 204 files changed, 920 insertions(+), 2958 deletions(-)
 delete mode 100644 src/test/ui/associated-types/associated-types-project-from-hrtb-in-fn-body.nll.stderr
 delete mode 100644 src/test/ui/associated-types/associated-types-subtyping-1.nll.stderr
 delete mode 100644 src/test/ui/associated-types/cache/project-fn-ret-contravariant.krisskross.nll.stderr
 delete mode 100644 src/test/ui/associated-types/cache/project-fn-ret-contravariant.transmute.nll.stderr
 delete mode 100644 src/test/ui/associated-types/cache/project-fn-ret-invariant.krisskross.nll.stderr
 delete mode 100644 src/test/ui/associated-types/cache/project-fn-ret-invariant.oneuse.nll.stderr
 delete mode 100644 src/test/ui/associated-types/cache/project-fn-ret-invariant.transmute.nll.stderr
 create mode 100644 src/test/ui/borrowck/borrowck-fn-in-const-a.ast.nll.stderr
 create mode 100644 src/test/ui/borrowck/borrowck-move-out-of-static-item.ast.nll.stderr
 delete mode 100644 src/test/ui/borrowck/borrowck-reborrow-from-shorter-lived-andmut.nll.stderr
 delete mode 100644 src/test/ui/borrowck/issue-7573.nll.stderr
 create mode 100644 src/test/ui/borrowck/move-in-static-initializer-issue-38520.ast.nll.stderr
 delete mode 100644 src/test/ui/borrowck/regions-escape-bound-fn-2.nll.stderr
 delete mode 100644 src/test/ui/borrowck/regions-escape-bound-fn.nll.stderr
 delete mode 100644 src/test/ui/borrowck/regions-escape-unboxed-closure.nll.stderr
 delete mode 100644 src/test/ui/closure-expected-type/expect-fn-supply-fn.nll.stderr
 delete mode 100644 src/test/ui/closures/closure-bounds-static-cant-capture-borrowed.nll.stderr
 delete mode 100644 src/test/ui/closures/closure-expected-type/expect-region-supply-region.nll.stderr
 create mode 100644 src/test/ui/error-codes/E0507.nll.stderr
 delete mode 100644 src/test/ui/error-codes/E0621-does-not-trigger-for-closures.nll.stderr
 delete mode 100644 src/test/ui/existential_types/generic_type_does_not_live_long_enough.nll.stderr
 delete mode 100644 src/test/ui/hr-subtype/hr-subtype.free_inv_x_vs_free_inv_y.nll.stderr
 delete mode 100644 src/test/ui/hr-subtype/hr-subtype.free_x_vs_free_y.nll.stderr
 delete mode 100644 src/test/ui/impl-header-lifetime-elision/dyn-trait.nll.stderr
 delete mode 100644 src/test/ui/impl-trait/must_outlive_least_region_or_bound.nll.stderr
 delete mode 100644 src/test/ui/impl-trait/static-return-lifetime-infered.nll.stderr
 delete mode 100644 src/test/ui/impl-trait/type_parameters_captured.nll.stderr
 delete mode 100644 src/test/ui/in-band-lifetimes/mismatched.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-10291.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-13058.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-15034.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-16683.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-17728.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-17758.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-26217.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-40288-2.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-52213.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-52533-1.nll.stderr
 delete mode 100644 src/test/ui/issues/issue-52533.nll.stderr
 delete mode 100644 src/test/ui/kindck/kindck-impl-type-params.nll.stderr
 delete mode 100644 src/test/ui/kindck/kindck-send-object1.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-bound-will-change-warning.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-if-else-using-impl.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-return-type-is-anon.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-self-is-anon.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name-2.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name-early-bound.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex2b-push-no-existing-names.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex2c-push-inference-variable.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex2d-push-inference-variable-2.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex2e-push-inference-variable-3.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-2.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-3.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-2.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-3.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-earlybound-regions.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-latebound-regions.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-latebound-regions.nll.stderr
 delete mode 100644 src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct-2.nll.stderr
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 delete mode 100644 src/test/ui/nll/ty-outlives/projection-where-clause-env-wrong-lifetime.nll.stderr
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 delete mode 100644 src/test/ui/regions/regions-outlives-projection-container-wc.nll.stderr
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 delete mode 100644 src/test/ui/regions/regions-variance-invariant-use-covariant.nll.stderr
 create mode 100644 src/test/ui/static/static-items-cant-move.nll.stderr
 create mode 100644 src/test/ui/trivial-bounds/trivial-bounds-leak-copy.nll.stderr
 delete mode 100644 src/test/ui/unboxed-closures/unboxed-closures-infer-argument-types-two-region-pointers.nll.stderr
 delete mode 100644 src/test/ui/underscore-lifetime/dyn-trait-underscore.nll.stderr
 delete mode 100644 src/test/ui/underscore-lifetime/underscore-lifetime-elison-mismatch.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-btree-invariant-types.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-cell-is-invariant.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-contravariant-arg-object.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-contravariant-arg-trait-match.nll.stderr
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 delete mode 100644 src/test/ui/variance/variance-covariant-arg-object.nll.stderr
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 delete mode 100644 src/test/ui/variance/variance-covariant-self-trait-match.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-invariant-arg-object.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-invariant-arg-trait-match.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-invariant-self-trait-match.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-trait-matching.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-use-contravariant-struct-1.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-use-covariant-struct-1.nll.stderr
 delete mode 100644 src/test/ui/variance/variance-use-invariant-struct-1.nll.stderr
 delete mode 100644 src/test/ui/wf/wf-static-method.nll.stderr

diff --git a/src/test/ui/access-mode-in-closures.nll.stderr b/src/test/ui/access-mode-in-closures.nll.stderr
index b9de60f43f703..3366f0639caa5 100644
--- a/src/test/ui/access-mode-in-closures.nll.stderr
+++ b/src/test/ui/access-mode-in-closures.nll.stderr
@@ -13,6 +13,18 @@ note: move occurs because `v` has type `std::vec::Vec<isize>`, which does not im
 LL |         match *s { sty(v) => v } //~ ERROR cannot move out
    |                        ^
 
-error: aborting due to previous error
+error[E0507]: cannot move out of `s.0` which is behind a `&` reference
+  --> $DIR/access-mode-in-closures.rs:19:24
+   |
+LL |     let _foo = unpack(|s| {
+   |                        - help: consider changing this to be a mutable reference: `&mut sty`
+LL |         // Test that `s` is moved here.
+LL |         match *s { sty(v) => v } //~ ERROR cannot move out
+   |                        ^
+   |                        |
+   |                        cannot move out of `s.0` which is behind a `&` reference
+   |                        `s` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/associated-types/associated-types-project-from-hrtb-in-fn-body.nll.stderr b/src/test/ui/associated-types/associated-types-project-from-hrtb-in-fn-body.nll.stderr
deleted file mode 100644
index 674d85d959112..0000000000000
--- a/src/test/ui/associated-types/associated-types-project-from-hrtb-in-fn-body.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/associated-types-project-from-hrtb-in-fn-body.rs:32:29
-   |
-LL | fn bar<'a, 'b, I : for<'x> Foo<&'x isize>>(
-   |        --  -- lifetime `'b` defined here
-   |        |
-   |        lifetime `'a` defined here
-...
-LL |     let z: I::A = if cond { x } else { y };
-   |                             ^ assignment requires that `'a` must outlive `'b`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/associated-types-project-from-hrtb-in-fn-body.rs:32:40
-   |
-LL | fn bar<'a, 'b, I : for<'x> Foo<&'x isize>>(
-   |        --  -- lifetime `'b` defined here
-   |        |
-   |        lifetime `'a` defined here
-...
-LL |     let z: I::A = if cond { x } else { y };
-   |                                        ^ assignment requires that `'b` must outlive `'a`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/associated-types/associated-types-subtyping-1.nll.stderr b/src/test/ui/associated-types/associated-types-subtyping-1.nll.stderr
deleted file mode 100644
index 1156c773b8c5a..0000000000000
--- a/src/test/ui/associated-types/associated-types-subtyping-1.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/associated-types-subtyping-1.rs:36:13
-   |
-LL | fn method2<'a,'b,T>(x: &'a T, y: &'b T)
-   |            -- -- lifetime `'b` defined here
-   |            |
-   |            lifetime `'a` defined here
-...
-LL |     let _c: <T as Trait<'b>>::Type = a; //~ ERROR E0623
-   |             ^^^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'b` must outlive `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/associated-types-subtyping-1.rs:44:12
-   |
-LL | fn method3<'a,'b,T>(x: &'a T, y: &'b T)
-   |            -- -- lifetime `'b` defined here
-   |            |
-   |            lifetime `'a` defined here
-...
-LL |     let b: <T as Trait<'b>>::Type = make_any();
-   |            ^^^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'b` must outlive `'a`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/associated-types/cache/project-fn-ret-contravariant.krisskross.nll.stderr b/src/test/ui/associated-types/cache/project-fn-ret-contravariant.krisskross.nll.stderr
deleted file mode 100644
index 044a3f70b4a63..0000000000000
--- a/src/test/ui/associated-types/cache/project-fn-ret-contravariant.krisskross.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/project-fn-ret-contravariant.rs:55:4
-   |
-LL | fn transmute<'a,'b>(x: &'a u32, y: &'b u32) -> (&'a u32, &'b u32) {
-   |              -- -- lifetime `'b` defined here
-   |              |
-   |              lifetime `'a` defined here
-...
-LL |    (a, b) //[krisskross]~ ERROR 55:5: 55:6: lifetime mismatch [E0623]
-   |    ^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/project-fn-ret-contravariant.rs:55:4
-   |
-LL | fn transmute<'a,'b>(x: &'a u32, y: &'b u32) -> (&'a u32, &'b u32) {
-   |              -- -- lifetime `'b` defined here
-   |              |
-   |              lifetime `'a` defined here
-...
-LL |    (a, b) //[krisskross]~ ERROR 55:5: 55:6: lifetime mismatch [E0623]
-   |    ^^^^^^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'b`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/associated-types/cache/project-fn-ret-contravariant.transmute.nll.stderr b/src/test/ui/associated-types/cache/project-fn-ret-contravariant.transmute.nll.stderr
deleted file mode 100644
index 10f70b525e055..0000000000000
--- a/src/test/ui/associated-types/cache/project-fn-ret-contravariant.transmute.nll.stderr
+++ /dev/null
@@ -1,20 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/project-fn-ret-contravariant.rs:48:4
-   |
-LL | fn baz<'a,'b>(x: &'a u32) -> &'static u32 {
-   |        -- lifetime `'a` defined here
-LL |    bar(foo, x) //[transmute]~ ERROR E0495
-   |    ^^^^^^^^^^^ returning this value requires that `'a` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/project-fn-ret-contravariant.rs:48:4
-   |
-LL | fn baz<'a,'b>(x: &'a u32) -> &'static u32 {
-   |        -- -- lifetime `'b` defined here
-   |        |
-   |        lifetime `'a` defined here
-LL |    bar(foo, x) //[transmute]~ ERROR E0495
-   |    ^^^^^^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/associated-types/cache/project-fn-ret-invariant.krisskross.nll.stderr b/src/test/ui/associated-types/cache/project-fn-ret-invariant.krisskross.nll.stderr
deleted file mode 100644
index 1cb687856942d..0000000000000
--- a/src/test/ui/associated-types/cache/project-fn-ret-invariant.krisskross.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/project-fn-ret-invariant.rs:65:4
-   |
-LL | fn transmute<'a,'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
-   |              -- -- lifetime `'b` defined here
-   |              |
-   |              lifetime `'a` defined here
-...
-LL |    (a, b) //[krisskross]~ ERROR E0623
-   |    ^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/project-fn-ret-invariant.rs:65:4
-   |
-LL | fn transmute<'a,'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
-   |              -- -- lifetime `'b` defined here
-   |              |
-   |              lifetime `'a` defined here
-...
-LL |    (a, b) //[krisskross]~ ERROR E0623
-   |    ^^^^^^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'b`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/associated-types/cache/project-fn-ret-invariant.oneuse.nll.stderr b/src/test/ui/associated-types/cache/project-fn-ret-invariant.oneuse.nll.stderr
deleted file mode 100644
index a9c2bb3763988..0000000000000
--- a/src/test/ui/associated-types/cache/project-fn-ret-invariant.oneuse.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/project-fn-ret-invariant.rs:48:12
-   |
-LL | fn baz<'a,'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
-   |        -- -- lifetime `'b` defined here
-   |        |
-   |        lifetime `'a` defined here
-LL |    let f = foo; // <-- No consistent type can be inferred for `f` here.
-LL |    let a = bar(f, x);
-   |            ^^^^^^^^^ argument requires that `'a` must outlive `'b`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/project-fn-ret-invariant.rs:49:12
-   |
-LL | fn baz<'a,'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
-   |        -- -- lifetime `'b` defined here
-   |        |
-   |        lifetime `'a` defined here
-...
-LL |    let b = bar(f, y); //[oneuse]~ ERROR 49:19: 49:20: lifetime mismatch [E0623]
-   |            ^^^^^^^^^ argument requires that `'b` must outlive `'a`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/associated-types/cache/project-fn-ret-invariant.transmute.nll.stderr b/src/test/ui/associated-types/cache/project-fn-ret-invariant.transmute.nll.stderr
deleted file mode 100644
index 2329adb5deab1..0000000000000
--- a/src/test/ui/associated-types/cache/project-fn-ret-invariant.transmute.nll.stderr
+++ /dev/null
@@ -1,22 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/project-fn-ret-invariant.rs:58:4
-   |
-LL | fn baz<'a,'b>(x: Type<'a>) -> Type<'static> {
-   |        -- lifetime `'a` defined here
-...
-LL |    bar(foo, x) //[transmute]~ ERROR E0495
-   |    ^^^^^^^^^^^ returning this value requires that `'a` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/project-fn-ret-invariant.rs:58:4
-   |
-LL | fn baz<'a,'b>(x: Type<'a>) -> Type<'static> {
-   |        -- -- lifetime `'b` defined here
-   |        |
-   |        lifetime `'a` defined here
-...
-LL |    bar(foo, x) //[transmute]~ ERROR E0495
-   |    ^^^^^^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/binop/binop-move-semantics.nll.stderr b/src/test/ui/binop/binop-move-semantics.nll.stderr
index 545a60f6770d9..94676f0e5ad77 100644
--- a/src/test/ui/binop/binop-move-semantics.nll.stderr
+++ b/src/test/ui/binop/binop-move-semantics.nll.stderr
@@ -32,6 +32,18 @@ error[E0507]: cannot move out of borrowed content
 LL |     *n;  //~ ERROR: cannot move out of borrowed content
    |     ^^ cannot move out of borrowed content
 
+error[E0507]: cannot move out of `*n` which is behind a `&` reference
+  --> $DIR/binop-move-semantics.rs:42:5
+   |
+LL |     let n = &y;
+   |             -- help: consider changing this to be a mutable reference: `&mut y`
+...
+LL |     *n;  //~ ERROR: cannot move out of borrowed content
+   |     ^^
+   |     |
+   |     cannot move out of `*n` which is behind a `&` reference
+   |     `n` is a `&` reference, so the data it refers to cannot be moved
+
 error[E0502]: cannot borrow `f` as immutable because it is also borrowed as mutable
   --> $DIR/binop-move-semantics.rs:64:5
    |
@@ -62,7 +74,7 @@ LL | |     &mut f;  //~ ERROR: cannot borrow `f` as mutable because it is also b
    |       |    immutable borrow later used here
    |       mutable borrow occurs here
 
-error: aborting due to 6 previous errors
+error: aborting due to 7 previous errors
 
 Some errors occurred: E0382, E0502, E0507.
 For more information about an error, try `rustc --explain E0382`.
diff --git a/src/test/ui/borrowck/borrowck-closures-unique.nll.stderr b/src/test/ui/borrowck/borrowck-closures-unique.nll.stderr
index 231ae53fe82bf..771ef88a662b1 100644
--- a/src/test/ui/borrowck/borrowck-closures-unique.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-closures-unique.nll.stderr
@@ -40,15 +40,19 @@ LL |     let c2 = || set(x); //~ ERROR two closures require unique access to `x`
 LL |     c1;
    |     -- first borrow later used here
 
-error[E0594]: cannot assign to `x`, as it is not declared as mutable
+warning[E0594]: cannot assign to `x`, as it is not declared as mutable
   --> $DIR/borrowck-closures-unique.rs:57:38
    |
 LL | fn e(x: &'static mut isize) {
    |      - help: consider changing this to be mutable: `mut x`
 LL |     let c1 = |y: &'static mut isize| x = y; //~ ERROR closure cannot assign to immutable argument
    |                                      ^^^^^ cannot assign
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
-error: aborting due to 4 previous errors
+error: aborting due to 3 previous errors
 
 Some errors occurred: E0500, E0524, E0594.
 For more information about an error, try `rustc --explain E0500`.
diff --git a/src/test/ui/borrowck/borrowck-describe-lvalue.ast.nll.stderr b/src/test/ui/borrowck/borrowck-describe-lvalue.ast.nll.stderr
index 5721c52ba2172..88ae73b6368e7 100644
--- a/src/test/ui/borrowck/borrowck-describe-lvalue.ast.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-describe-lvalue.ast.nll.stderr
@@ -20,7 +20,7 @@ LL |                    //[mir]~^ ERROR cannot borrow `x` as mutable more than o
 LL |                    *y = 1;
    |                    ------ first borrow later used here
 
-error: captured variable cannot escape `FnMut` closure body
+warning: captured variable cannot escape `FnMut` closure body
   --> $DIR/borrowck-describe-lvalue.rs:305:16
    |
 LL |              || {
@@ -36,6 +36,9 @@ LL | |                 }
    |
    = note: `FnMut` closures only have access to their captured variables while they are executing...
    = note: ...therefore, they cannot allow references to captured variables to escape
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
 error[E0503]: cannot use `f.x` because it was mutably borrowed
   --> $DIR/borrowck-describe-lvalue.rs:53:9
@@ -339,7 +342,7 @@ LL |             &[_, F {x: ref xf, ..}] => println!("{}", xf),
 LL |         drop(x);
    |              - mutable borrow later used here
 
-error[E0502]: cannot borrow `*block.current` as immutable because it is also borrowed as mutable
+warning[E0502]: cannot borrow `*block.current` as immutable because it is also borrowed as mutable
   --> $DIR/borrowck-describe-lvalue.rs:245:29
    |
 LL |             let x = &mut block;
@@ -349,8 +352,12 @@ LL |             let p: &'a u8 = &*block.current;
 ...
 LL |             drop(x);
    |                  - mutable borrow later used here
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
-error[E0502]: cannot borrow `*block.current` as immutable because it is also borrowed as mutable
+warning[E0502]: cannot borrow `*block.current` as immutable because it is also borrowed as mutable
   --> $DIR/borrowck-describe-lvalue.rs:260:33
    |
 LL |             let x = &mut block;
@@ -360,6 +367,10 @@ LL |             let p : *const u8 = &*(*block).current;
 ...
 LL |             drop(x);
    |                  - mutable borrow later used here
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
 error[E0382]: use of moved value: `x`
   --> $DIR/borrowck-describe-lvalue.rs:318:22
@@ -371,7 +382,7 @@ LL |                 drop(x); //[ast]~ ERROR use of moved value: `x`
    |
    = note: move occurs because `x` has type `std::vec::Vec<i32>`, which does not implement the `Copy` trait
 
-error: aborting due to 32 previous errors
+error: aborting due to 29 previous errors
 
 Some errors occurred: E0382, E0499, E0502, E0503.
 For more information about an error, try `rustc --explain E0382`.
diff --git a/src/test/ui/borrowck/borrowck-fn-in-const-a.ast.nll.stderr b/src/test/ui/borrowck/borrowck-fn-in-const-a.ast.nll.stderr
new file mode 100644
index 0000000000000..b171a48ac5081
--- /dev/null
+++ b/src/test/ui/borrowck/borrowck-fn-in-const-a.ast.nll.stderr
@@ -0,0 +1,20 @@
+error[E0507]: cannot move out of borrowed content
+  --> $DIR/borrowck-fn-in-const-a.rs:19:16
+   |
+LL |         return *x //[ast]~ ERROR cannot move out of borrowed content [E0507]
+   |                ^^ cannot move out of borrowed content
+
+error[E0507]: cannot move out of `*x` which is behind a `&` reference
+  --> $DIR/borrowck-fn-in-const-a.rs:19:16
+   |
+LL |     fn broken(x: &String) -> String {
+   |                  ------- help: consider changing this to be a mutable reference: `&mut std::string::String`
+LL |         return *x //[ast]~ ERROR cannot move out of borrowed content [E0507]
+   |                ^^
+   |                |
+   |                cannot move out of `*x` which is behind a `&` reference
+   |                `x` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-for-loop-correct-cmt-for-pattern.nll.stderr b/src/test/ui/borrowck/borrowck-for-loop-correct-cmt-for-pattern.nll.stderr
index 25eb69ad9377d..0ab3d3ea5cdfe 100644
--- a/src/test/ui/borrowck/borrowck-for-loop-correct-cmt-for-pattern.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-for-loop-correct-cmt-for-pattern.nll.stderr
@@ -1,3 +1,13 @@
+error[E0507]: cannot move out of `*__next` which is behind a `&` reference
+  --> $DIR/borrowck-for-loop-correct-cmt-for-pattern.rs:22:10
+   |
+LL |     for &a in x.iter() {    //~ ERROR cannot move out
+   |         -^
+   |         ||
+   |         |cannot move out of `*__next` which is behind a `&` reference
+   |         |`__next` is a `&` reference, so the data it refers to cannot be moved
+   |         help: consider changing this to be a mutable reference: `&mut a`
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/borrowck-for-loop-correct-cmt-for-pattern.rs:22:15
    |
@@ -13,6 +23,16 @@ note: move occurs because `a` has type `&mut i32`, which does not implement the
 LL |     for &a in x.iter() {    //~ ERROR cannot move out
    |          ^
 
+error[E0507]: cannot move out of `*__next` which is behind a `&` reference
+  --> $DIR/borrowck-for-loop-correct-cmt-for-pattern.rs:28:10
+   |
+LL |     for &a in &f.a {  //~ ERROR cannot move out
+   |         -^
+   |         ||
+   |         |cannot move out of `*__next` which is behind a `&` reference
+   |         |`__next` is a `&` reference, so the data it refers to cannot be moved
+   |         help: consider changing this to be a mutable reference: `&mut a`
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/borrowck-for-loop-correct-cmt-for-pattern.rs:28:15
    |
@@ -28,6 +48,16 @@ note: move occurs because `a` has type `std::boxed::Box<isize>`, which does not
 LL |     for &a in &f.a {  //~ ERROR cannot move out
    |          ^
 
+error[E0507]: cannot move out of `*__next` which is behind a `&` reference
+  --> $DIR/borrowck-for-loop-correct-cmt-for-pattern.rs:32:10
+   |
+LL |     for &a in x.iter() {    //~ ERROR cannot move out
+   |         -^
+   |         ||
+   |         |cannot move out of `*__next` which is behind a `&` reference
+   |         |`__next` is a `&` reference, so the data it refers to cannot be moved
+   |         help: consider changing this to be a mutable reference: `&mut a`
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/borrowck-for-loop-correct-cmt-for-pattern.rs:32:15
    |
@@ -43,6 +73,6 @@ note: move occurs because `a` has type `std::boxed::Box<i32>`, which does not im
 LL |     for &a in x.iter() {    //~ ERROR cannot move out
    |          ^
 
-error: aborting due to 3 previous errors
+error: aborting due to 6 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-in-static.nll.stderr b/src/test/ui/borrowck/borrowck-in-static.nll.stderr
index 45fa1764f7027..ba42dc2436377 100644
--- a/src/test/ui/borrowck/borrowck-in-static.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-in-static.nll.stderr
@@ -6,6 +6,21 @@ LL |     let x = Box::new(0);
 LL |     Box::new(|| x) //~ ERROR cannot move out of captured outer variable
    |                 ^ cannot move out of captured variable in an `Fn` closure
 
-error: aborting due to previous error
+error[E0507]: cannot move out of `x`, as it is a captured variable in a `Fn` closure
+  --> $DIR/borrowck-in-static.rs:15:17
+   |
+LL |     Box::new(|| x) //~ ERROR cannot move out of captured outer variable
+   |                 ^
+   |                 |
+   |                 cannot move out of `x`, as it is a captured variable in a `Fn` closure
+   |                 cannot move
+   |
+help: consider changing this to accept closures that implement `FnMut`
+  --> $DIR/borrowck-in-static.rs:15:14
+   |
+LL |     Box::new(|| x) //~ ERROR cannot move out of captured outer variable
+   |              ^^^^
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-issue-2657-2.nll.stderr b/src/test/ui/borrowck/borrowck-issue-2657-2.nll.stderr
index cdbfab8bd054a..0445a75d61a9d 100644
--- a/src/test/ui/borrowck/borrowck-issue-2657-2.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-issue-2657-2.nll.stderr
@@ -7,6 +7,17 @@ LL |         let _b = *y; //~ ERROR cannot move out
    |                  cannot move out of borrowed content
    |                  help: consider removing the `*`: `y`
 
-error: aborting due to previous error
+error[E0507]: cannot move out of `*y` which is behind a `&` reference
+  --> $DIR/borrowck-issue-2657-2.rs:17:18
+   |
+LL |       Some(ref y) => {
+   |            ----- help: consider changing this to be a mutable reference: `ref mut y`
+LL |         let _b = *y; //~ ERROR cannot move out
+   |                  ^^
+   |                  |
+   |                  cannot move out of `*y` which is behind a `&` reference
+   |                  `y` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-move-error-with-note.nll.stderr b/src/test/ui/borrowck/borrowck-move-error-with-note.nll.stderr
index 2df520a936c9d..99f69515a4732 100644
--- a/src/test/ui/borrowck/borrowck-move-error-with-note.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-move-error-with-note.nll.stderr
@@ -24,6 +24,42 @@ LL |                   num2) => (),
 LL |         Foo::Foo2(num) => (),
    |                   ^^^
 
+error[E0507]: cannot move out of `f.0` which is behind a `&` reference
+  --> $DIR/borrowck-move-error-with-note.rs:23:19
+   |
+LL |     let f = &Foo::Foo1(box 1, box 2);
+   |             ------------------------ help: consider changing this to be a mutable reference: `&mut Foo::Foo1(box 1, box 2)`
+...
+LL |         Foo::Foo1(num1,
+   |                   ^^^^
+   |                   |
+   |                   cannot move out of `f.0` which is behind a `&` reference
+   |                   `f` is a `&` reference, so the data it refers to cannot be moved
+
+error[E0507]: cannot move out of `f.1` which is behind a `&` reference
+  --> $DIR/borrowck-move-error-with-note.rs:24:19
+   |
+LL |     let f = &Foo::Foo1(box 1, box 2);
+   |             ------------------------ help: consider changing this to be a mutable reference: `&mut Foo::Foo1(box 1, box 2)`
+...
+LL |                   num2) => (),
+   |                   ^^^^
+   |                   |
+   |                   cannot move out of `f.1` which is behind a `&` reference
+   |                   `f` is a `&` reference, so the data it refers to cannot be moved
+
+error[E0507]: cannot move out of `f.0` which is behind a `&` reference
+  --> $DIR/borrowck-move-error-with-note.rs:25:19
+   |
+LL |     let f = &Foo::Foo1(box 1, box 2);
+   |             ------------------------ help: consider changing this to be a mutable reference: `&mut Foo::Foo1(box 1, box 2)`
+...
+LL |         Foo::Foo2(num) => (),
+   |                   ^^^
+   |                   |
+   |                   cannot move out of `f.0` which is behind a `&` reference
+   |                   `f` is a `&` reference, so the data it refers to cannot be moved
+
 error[E0509]: cannot move out of type `S`, which implements the `Drop` trait
   --> $DIR/borrowck-move-error-with-note.rs:39:11
    |
@@ -61,7 +97,19 @@ note: move occurs because `n` has type `std::boxed::Box<isize>`, which does not
 LL |         n => {
    |         ^
 
-error: aborting due to 3 previous errors
+error[E0507]: cannot move out of `a.a` which is behind a `&` reference
+  --> $DIR/borrowck-move-error-with-note.rs:59:9
+   |
+LL |     let a = &A { a: box 1 };
+   |             --------------- help: consider changing this to be a mutable reference: `&mut A { a: box 1 }`
+...
+LL |         n => {
+   |         ^
+   |         |
+   |         cannot move out of `a.a` which is behind a `&` reference
+   |         `a` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 7 previous errors
 
 Some errors occurred: E0507, E0509.
 For more information about an error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-move-from-unsafe-ptr.nll.stderr b/src/test/ui/borrowck/borrowck-move-from-unsafe-ptr.nll.stderr
index c3a2180b9f082..83c5b82957dea 100644
--- a/src/test/ui/borrowck/borrowck-move-from-unsafe-ptr.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-move-from-unsafe-ptr.nll.stderr
@@ -7,6 +7,17 @@ LL |     let y = *x; //~ ERROR cannot move out of dereference of raw pointer
    |             cannot move out of dereference of raw pointer
    |             help: consider removing the `*`: `x`
 
-error: aborting due to previous error
+error[E0507]: cannot move out of `*x` which is behind a `*const` pointer
+  --> $DIR/borrowck-move-from-unsafe-ptr.rs:13:13
+   |
+LL | unsafe fn foo(x: *const Box<isize>) -> Box<isize> {
+   |                  ----------------- help: consider changing this to be a mutable pointer: `*mut std::boxed::Box<isize>`
+LL |     let y = *x; //~ ERROR cannot move out of dereference of raw pointer
+   |             ^^
+   |             |
+   |             cannot move out of `*x` which is behind a `*const` pointer
+   |             `x` is a `*const` pointer, so the data it refers to cannot be moved
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-move-in-irrefut-pat.ast.nll.stderr b/src/test/ui/borrowck/borrowck-move-in-irrefut-pat.ast.nll.stderr
index 49c2ec0dcf4e7..f22aca9994986 100644
--- a/src/test/ui/borrowck/borrowck-move-in-irrefut-pat.ast.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-move-in-irrefut-pat.ast.nll.stderr
@@ -14,6 +14,15 @@ note: move occurs because `_x` has type `std::string::String`, which does not im
 LL | fn arg_item(&_x: &String) {}
    |              ^^
 
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/borrowck-move-in-irrefut-pat.rs:16:14
+   |
+LL | fn arg_item(&_x: &String) {}
+   |              ^^
+   |              |
+   |              cannot move out of data in a `&` reference
+   |              cannot move
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/borrowck-move-in-irrefut-pat.rs:21:11
    |
@@ -30,6 +39,24 @@ note: move occurs because `_x` has type `std::string::String`, which does not im
 LL |     with(|&_x| ())
    |            ^^
 
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/borrowck-move-in-irrefut-pat.rs:21:12
+   |
+LL |     with(|&_x| ())
+   |            ^^
+   |            |
+   |            cannot move out of data in a `&` reference
+   |            cannot move
+
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/borrowck-move-in-irrefut-pat.rs:27:10
+   |
+LL |     let &_x = &"hi".to_string();
+   |          ^^
+   |          |
+   |          cannot move out of data in a `&` reference
+   |          cannot move
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/borrowck-move-in-irrefut-pat.rs:27:15
    |
@@ -45,6 +72,6 @@ note: move occurs because `_x` has type `std::string::String`, which does not im
 LL |     let &_x = &"hi".to_string();
    |          ^^
 
-error: aborting due to 3 previous errors
+error: aborting due to 6 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-move-out-of-overloaded-auto-deref.ast.nll.stderr b/src/test/ui/borrowck/borrowck-move-out-of-overloaded-auto-deref.ast.nll.stderr
index d58beabb3038a..ba74cd2514e1a 100644
--- a/src/test/ui/borrowck/borrowck-move-out-of-overloaded-auto-deref.ast.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-move-out-of-overloaded-auto-deref.ast.nll.stderr
@@ -4,6 +4,15 @@ error[E0507]: cannot move out of an `Rc`
 LL |     let _x = Rc::new(vec![1, 2]).into_iter();
    |              ^^^^^^^^^^^^^^^^^^^ cannot move out of an `Rc`
 
-error: aborting due to previous error
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/borrowck-move-out-of-overloaded-auto-deref.rs:17:14
+   |
+LL |     let _x = Rc::new(vec![1, 2]).into_iter();
+   |              ^^^^^^^^^^^^^^^^^^^
+   |              |
+   |              cannot move out of data in a `&` reference
+   |              cannot move
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-move-out-of-overloaded-deref.nll.stderr b/src/test/ui/borrowck/borrowck-move-out-of-overloaded-deref.nll.stderr
index c9c8cf104ce2e..205044bb36885 100644
--- a/src/test/ui/borrowck/borrowck-move-out-of-overloaded-deref.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-move-out-of-overloaded-deref.nll.stderr
@@ -7,6 +7,15 @@ LL |     let _x = *Rc::new("hi".to_string());
    |              cannot move out of an `Rc`
    |              help: consider removing the `*`: `Rc::new("hi".to_string())`
 
-error: aborting due to previous error
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/borrowck-move-out-of-overloaded-deref.rs:14:14
+   |
+LL |     let _x = *Rc::new("hi".to_string());
+   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |              |
+   |              cannot move out of data in a `&` reference
+   |              cannot move
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-move-out-of-static-item.ast.nll.stderr b/src/test/ui/borrowck/borrowck-move-out-of-static-item.ast.nll.stderr
new file mode 100644
index 0000000000000..675458d8c2b85
--- /dev/null
+++ b/src/test/ui/borrowck/borrowck-move-out-of-static-item.ast.nll.stderr
@@ -0,0 +1,18 @@
+error[E0507]: cannot move out of static item
+  --> $DIR/borrowck-move-out-of-static-item.rs:28:10
+   |
+LL |     test(BAR); //[ast]~ ERROR cannot move out of static item [E0507]
+   |          ^^^ cannot move out of static item
+
+error[E0507]: cannot move out of immutable static item `BAR`
+  --> $DIR/borrowck-move-out-of-static-item.rs:28:10
+   |
+LL |     test(BAR); //[ast]~ ERROR cannot move out of static item [E0507]
+   |          ^^^
+   |          |
+   |          cannot move out of immutable static item `BAR`
+   |          cannot move
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-move-out-of-vec-tail.nll.stderr b/src/test/ui/borrowck/borrowck-move-out-of-vec-tail.nll.stderr
index f3430ba4e06c9..dea42c53992b1 100644
--- a/src/test/ui/borrowck/borrowck-move-out-of-vec-tail.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-move-out-of-vec-tail.nll.stderr
@@ -26,6 +26,31 @@ LL |                 //~| to prevent move
 LL |                   Foo { string: b }] => {
    |
 
-error: aborting due to previous error
+error[E0507]: cannot move out of `tail[..].string` which is behind a `&` reference
+  --> $DIR/borrowck-move-out-of-vec-tail.rs:30:33
+   |
+LL |         [_, ref tail..] => {
+   |             -------- help: consider changing this to be a mutable reference: `ref mut tail`
+LL |             match tail {
+LL |                 &[Foo { string: a },
+   |                                 ^
+   |                                 |
+   |                                 cannot move out of `tail[..].string` which is behind a `&` reference
+   |                                 `tail` is a `&` reference, so the data it refers to cannot be moved
+
+error[E0507]: cannot move out of `tail[..].string` which is behind a `&` reference
+  --> $DIR/borrowck-move-out-of-vec-tail.rs:34:33
+   |
+LL |         [_, ref tail..] => {
+   |             -------- help: consider changing this to be a mutable reference: `ref mut tail`
+...
+LL |                   Foo { string: b }] => {
+   |                                 ^
+   |                                 |
+   |                                 cannot move out of `tail[..].string` which is behind a `&` reference
+   |                                 `tail` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 3 previous errors
 
-For more information about this error, try `rustc --explain E0508`.
+Some errors occurred: E0507, E0508.
+For more information about an error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-overloaded-index-move-from-vec.nll.stderr b/src/test/ui/borrowck/borrowck-overloaded-index-move-from-vec.nll.stderr
index 92e10c258c269..05fd6d71520c7 100644
--- a/src/test/ui/borrowck/borrowck-overloaded-index-move-from-vec.nll.stderr
+++ b/src/test/ui/borrowck/borrowck-overloaded-index-move-from-vec.nll.stderr
@@ -7,6 +7,15 @@ LL |     let bad = v[0];
    |               cannot move out of borrowed content
    |               help: consider borrowing here: `&v[0]`
 
-error: aborting due to previous error
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/borrowck-overloaded-index-move-from-vec.rs:30:15
+   |
+LL |     let bad = v[0];
+   |               ^^^^
+   |               |
+   |               cannot move out of data in a `&` reference
+   |               cannot move
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/borrowck-reborrow-from-shorter-lived-andmut.nll.stderr b/src/test/ui/borrowck/borrowck-reborrow-from-shorter-lived-andmut.nll.stderr
deleted file mode 100644
index e3211f8385099..0000000000000
--- a/src/test/ui/borrowck/borrowck-reborrow-from-shorter-lived-andmut.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/borrowck-reborrow-from-shorter-lived-andmut.rs:19:5
-   |
-LL | fn copy_borrowed_ptr<'a,'b>(p: &'a mut S<'b>) -> S<'b> {
-   |                      -- -- lifetime `'b` defined here
-   |                      |
-   |                      lifetime `'a` defined here
-LL |     S { pointer: &mut *p.pointer }
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/borrowck/issue-51415.nll.stderr b/src/test/ui/borrowck/issue-51415.nll.stderr
index d4340938eebc1..ee7e3e71962e8 100644
--- a/src/test/ui/borrowck/issue-51415.nll.stderr
+++ b/src/test/ui/borrowck/issue-51415.nll.stderr
@@ -13,6 +13,15 @@ note: move occurs because `s` has type `std::string::String`, which does not imp
 LL |     let opt = a.iter().enumerate().find(|(_, &s)| {
    |                                               ^
 
-error: aborting due to previous error
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/issue-51415.rs:16:47
+   |
+LL |     let opt = a.iter().enumerate().find(|(_, &s)| {
+   |                                               ^
+   |                                               |
+   |                                               cannot move out of data in a `&` reference
+   |                                               cannot move
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/issue-7573.nll.stderr b/src/test/ui/borrowck/issue-7573.nll.stderr
deleted file mode 100644
index 372df61d78c45..0000000000000
--- a/src/test/ui/borrowck/issue-7573.nll.stderr
+++ /dev/null
@@ -1,14 +0,0 @@
-error: borrowed data escapes outside of closure
-  --> $DIR/issue-7573.rs:32:9
-   |
-LL |     let mut lines_to_use: Vec<&CrateId> = Vec::new();
-   |         ---------------- `lines_to_use` is declared here, outside of the closure body
-LL |         //~^ NOTE cannot infer an appropriate lifetime
-LL |     let push_id = |installed_id: &CrateId| {
-   |                    ------------ `installed_id` is a reference that is only valid in the closure body
-...
-LL |         lines_to_use.push(installed_id);
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `installed_id` escapes the closure body here
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/borrowck/move-in-static-initializer-issue-38520.ast.nll.stderr b/src/test/ui/borrowck/move-in-static-initializer-issue-38520.ast.nll.stderr
new file mode 100644
index 0000000000000..d25fc75977542
--- /dev/null
+++ b/src/test/ui/borrowck/move-in-static-initializer-issue-38520.ast.nll.stderr
@@ -0,0 +1,33 @@
+error[E0507]: cannot move out of borrowed content
+  --> $DIR/move-in-static-initializer-issue-38520.rs:25:23
+   |
+LL | static Y: usize = get(*&X); //[ast]~ ERROR E0507
+   |                       ^^^ cannot move out of borrowed content
+
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/move-in-static-initializer-issue-38520.rs:25:23
+   |
+LL | static Y: usize = get(*&X); //[ast]~ ERROR E0507
+   |                       ^^^
+   |                       |
+   |                       cannot move out of data in a `&` reference
+   |                       cannot move
+
+error[E0507]: cannot move out of borrowed content
+  --> $DIR/move-in-static-initializer-issue-38520.rs:27:22
+   |
+LL | const Z: usize = get(*&X); //[ast]~ ERROR E0507
+   |                      ^^^ cannot move out of borrowed content
+
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/move-in-static-initializer-issue-38520.rs:27:22
+   |
+LL | const Z: usize = get(*&X); //[ast]~ ERROR E0507
+   |                      ^^^
+   |                      |
+   |                      cannot move out of data in a `&` reference
+   |                      cannot move
+
+error: aborting due to 4 previous errors
+
+For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/borrowck/mutability-errors.nll.stderr b/src/test/ui/borrowck/mutability-errors.nll.stderr
index 14c41bb81b2c6..bb45fe2da8117 100644
--- a/src/test/ui/borrowck/mutability-errors.nll.stderr
+++ b/src/test/ui/borrowck/mutability-errors.nll.stderr
@@ -277,7 +277,7 @@ LL |     &mut x; //~ ERROR
 LL |     &mut x.0; //~ ERROR
    |     ^^^^^^^^ cannot borrow as mutable
 
-error[E0594]: cannot assign to `x`, as it is not declared as mutable
+warning[E0594]: cannot assign to `x`, as it is not declared as mutable
   --> $DIR/mutability-errors.rs:70:9
    |
 LL | fn imm_capture(x: (i32,)) {
@@ -285,8 +285,12 @@ LL | fn imm_capture(x: (i32,)) {
 LL |     || { //~ ERROR
 LL |         x = (1,);
    |         ^^^^^^^^ cannot assign
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
-error[E0594]: cannot assign to `x.0`, as `x` is not declared as mutable
+warning[E0594]: cannot assign to `x.0`, as `x` is not declared as mutable
   --> $DIR/mutability-errors.rs:71:9
    |
 LL | fn imm_capture(x: (i32,)) {
@@ -294,8 +298,12 @@ LL | fn imm_capture(x: (i32,)) {
 ...
 LL |         x.0 = 1;
    |         ^^^^^^^ cannot assign
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
-error[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
+warning[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
   --> $DIR/mutability-errors.rs:72:9
    |
 LL | fn imm_capture(x: (i32,)) {
@@ -303,8 +311,12 @@ LL | fn imm_capture(x: (i32,)) {
 ...
 LL |         &mut x;
    |         ^^^^^^ cannot borrow as mutable
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
-error[E0596]: cannot borrow `x.0` as mutable, as `x` is not declared as mutable
+warning[E0596]: cannot borrow `x.0` as mutable, as `x` is not declared as mutable
   --> $DIR/mutability-errors.rs:73:9
    |
 LL | fn imm_capture(x: (i32,)) {
@@ -312,6 +324,10 @@ LL | fn imm_capture(x: (i32,)) {
 ...
 LL |         &mut x.0;
    |         ^^^^^^^^ cannot borrow as mutable
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
 error[E0594]: cannot assign to `x`, as it is not declared as mutable
   --> $DIR/mutability-errors.rs:76:9
@@ -373,7 +389,7 @@ error[E0596]: cannot borrow `X.0` as mutable, as `X` is an immutable static item
 LL |     &mut X.0; //~ ERROR
    |     ^^^^^^^^ cannot borrow as mutable
 
-error: aborting due to 38 previous errors
+error: aborting due to 34 previous errors
 
 Some errors occurred: E0594, E0596.
 For more information about an error, try `rustc --explain E0594`.
diff --git a/src/test/ui/borrowck/regions-escape-bound-fn-2.nll.stderr b/src/test/ui/borrowck/regions-escape-bound-fn-2.nll.stderr
deleted file mode 100644
index 787fc4d872996..0000000000000
--- a/src/test/ui/borrowck/regions-escape-bound-fn-2.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: borrowed data escapes outside of closure
-  --> $DIR/regions-escape-bound-fn-2.rs:18:18
-   |
-LL |     let mut x = None;
-   |         ----- `x` is declared here, outside of the closure body
-LL |     with_int(|y| x = Some(y));
-   |               -  ^^^^^^^^^^^ `y` escapes the closure body here
-   |               |
-   |               `y` is a reference that is only valid in the closure body
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/borrowck/regions-escape-bound-fn.nll.stderr b/src/test/ui/borrowck/regions-escape-bound-fn.nll.stderr
deleted file mode 100644
index 91f1f00ce30ff..0000000000000
--- a/src/test/ui/borrowck/regions-escape-bound-fn.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: borrowed data escapes outside of closure
-  --> $DIR/regions-escape-bound-fn.rs:18:18
-   |
-LL |     let mut x: Option<&isize> = None;
-   |         ----- `x` is declared here, outside of the closure body
-LL |     with_int(|y| x = Some(y));
-   |               -  ^^^^^^^^^^^ `y` escapes the closure body here
-   |               |
-   |               `y` is a reference that is only valid in the closure body
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/borrowck/regions-escape-unboxed-closure.nll.stderr b/src/test/ui/borrowck/regions-escape-unboxed-closure.nll.stderr
deleted file mode 100644
index 44e7018fdd764..0000000000000
--- a/src/test/ui/borrowck/regions-escape-unboxed-closure.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: borrowed data escapes outside of closure
-  --> $DIR/regions-escape-unboxed-closure.rs:16:23
-   |
-LL |     let mut x: Option<&isize> = None;
-   |         ----- `x` is declared here, outside of the closure body
-LL |     with_int(&mut |y| x = Some(y));
-   |                    -  ^^^^^^^^^^^ `y` escapes the closure body here
-   |                    |
-   |                    `y` is a reference that is only valid in the closure body
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/borrowck/unboxed-closures-move-upvar-from-non-once-ref-closure.nll.stderr b/src/test/ui/borrowck/unboxed-closures-move-upvar-from-non-once-ref-closure.nll.stderr
index 0eb5fc8c32435..0844ac32b8b60 100644
--- a/src/test/ui/borrowck/unboxed-closures-move-upvar-from-non-once-ref-closure.nll.stderr
+++ b/src/test/ui/borrowck/unboxed-closures-move-upvar-from-non-once-ref-closure.nll.stderr
@@ -7,6 +7,25 @@ LL |     call(|| {
 LL |         y.into_iter();
    |         ^ cannot move out of captured variable in an `Fn` closure
 
-error: aborting due to previous error
+error[E0507]: cannot move out of `y`, as it is a captured variable in a `Fn` closure
+  --> $DIR/unboxed-closures-move-upvar-from-non-once-ref-closure.rs:21:9
+   |
+LL |         y.into_iter();
+   |         ^
+   |         |
+   |         cannot move out of `y`, as it is a captured variable in a `Fn` closure
+   |         cannot move
+   |
+help: consider changing this to accept closures that implement `FnMut`
+  --> $DIR/unboxed-closures-move-upvar-from-non-once-ref-closure.rs:20:10
+   |
+LL |       call(|| {
+   |  __________^
+LL | |         y.into_iter();
+LL | |         //~^ ERROR cannot move out of captured outer variable in an `Fn` closure
+LL | |     });
+   | |_____^
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/by-move-pattern-binding.nll.stderr b/src/test/ui/by-move-pattern-binding.nll.stderr
index 491b5b5bd74ab..4098795811589 100644
--- a/src/test/ui/by-move-pattern-binding.nll.stderr
+++ b/src/test/ui/by-move-pattern-binding.nll.stderr
@@ -16,6 +16,15 @@ note: move occurs because `identifier` has type `std::string::String`, which doe
 LL |         &E::Bar(identifier) => f(identifier.clone())  //~ ERROR cannot move
    |                 ^^^^^^^^^^
 
-error: aborting due to previous error
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/by-move-pattern-binding.rs:26:17
+   |
+LL |         &E::Bar(identifier) => f(identifier.clone())  //~ ERROR cannot move
+   |                 ^^^^^^^^^^
+   |                 |
+   |                 cannot move out of data in a `&` reference
+   |                 cannot move
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/check-static-values-constraints.nll.stderr b/src/test/ui/check-static-values-constraints.nll.stderr
index 5522e22fb1fa2..576322ff5c195 100644
--- a/src/test/ui/check-static-values-constraints.nll.stderr
+++ b/src/test/ui/check-static-values-constraints.nll.stderr
@@ -58,13 +58,22 @@ LL |     let y = { static x: Box<isize> = box 3; x };
    |                                             cannot move out of static item
    |                                             help: consider borrowing here: `&x`
 
+error[E0507]: cannot move out of immutable static item `x`
+  --> $DIR/check-static-values-constraints.rs:120:45
+   |
+LL |     let y = { static x: Box<isize> = box 3; x };
+   |                                             ^
+   |                                             |
+   |                                             cannot move out of immutable static item `x`
+   |                                             cannot move
+
 error[E0010]: allocations are not allowed in statics
   --> $DIR/check-static-values-constraints.rs:120:38
    |
 LL |     let y = { static x: Box<isize> = box 3; x };
    |                                      ^^^^^ allocation not allowed in statics
 
-error: aborting due to 10 previous errors
+error: aborting due to 11 previous errors
 
 Some errors occurred: E0010, E0015, E0493, E0507.
 For more information about an error, try `rustc --explain E0010`.
diff --git a/src/test/ui/closure-expected-type/expect-fn-supply-fn.nll.stderr b/src/test/ui/closure-expected-type/expect-fn-supply-fn.nll.stderr
deleted file mode 100644
index ae3e3a262b5ad..0000000000000
--- a/src/test/ui/closure-expected-type/expect-fn-supply-fn.nll.stderr
+++ /dev/null
@@ -1,54 +0,0 @@
-error[E0631]: type mismatch in closure arguments
-  --> $DIR/expect-fn-supply-fn.rs:40:5
-   |
-LL |     with_closure_expecting_fn_with_free_region(|x: fn(&u32), y| {});
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ---------------- found signature of `fn(for<'r> fn(&'r u32), _) -> _`
-   |     |
-   |     expected signature of `for<'a, 'r> fn(fn(&'a u32), &'r i32) -> _`
-   |
-note: required by `with_closure_expecting_fn_with_free_region`
-  --> $DIR/expect-fn-supply-fn.rs:11:1
-   |
-LL | / fn with_closure_expecting_fn_with_free_region<F>(_: F)
-LL | |     where F: for<'a> FnOnce(fn(&'a u32), &i32)
-LL | | {
-LL | | }
-   | |_^
-
-error[E0631]: type mismatch in closure arguments
-  --> $DIR/expect-fn-supply-fn.rs:47:5
-   |
-LL |     with_closure_expecting_fn_with_bound_region(|x: fn(&'x u32), y| {});
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ------------------- found signature of `fn(fn(&'x u32), _) -> _`
-   |     |
-   |     expected signature of `for<'r> fn(for<'s> fn(&'s u32), &'r i32) -> _`
-   |
-note: required by `with_closure_expecting_fn_with_bound_region`
-  --> $DIR/expect-fn-supply-fn.rs:16:1
-   |
-LL | / fn with_closure_expecting_fn_with_bound_region<F>(_: F)
-LL | |     where F: FnOnce(fn(&u32), &i32)
-LL | | {
-LL | | }
-   | |_^
-
-error[E0631]: type mismatch in closure arguments
-  --> $DIR/expect-fn-supply-fn.rs:56:5
-   |
-LL |     with_closure_expecting_fn_with_bound_region(|_x: Foo<'_>, y| {});
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ---------------- found signature of `for<'r> fn(fn(&'r u32), _) -> _`
-   |     |
-   |     expected signature of `for<'r> fn(for<'s> fn(&'s u32), &'r i32) -> _`
-   |
-note: required by `with_closure_expecting_fn_with_bound_region`
-  --> $DIR/expect-fn-supply-fn.rs:16:1
-   |
-LL | / fn with_closure_expecting_fn_with_bound_region<F>(_: F)
-LL | |     where F: FnOnce(fn(&u32), &i32)
-LL | | {
-LL | | }
-   | |_^
-
-error: aborting due to 3 previous errors
-
-For more information about this error, try `rustc --explain E0631`.
diff --git a/src/test/ui/closures/closure-bounds-static-cant-capture-borrowed.nll.stderr b/src/test/ui/closures/closure-bounds-static-cant-capture-borrowed.nll.stderr
deleted file mode 100644
index 4bc5034f93e4d..0000000000000
--- a/src/test/ui/closures/closure-bounds-static-cant-capture-borrowed.nll.stderr
+++ /dev/null
@@ -1,29 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `x`
-  --> $DIR/closure-bounds-static-cant-capture-borrowed.rs:15:5
-   |
-LL |   fn foo(x: &()) {
-   |             --- help: add explicit lifetime `'static` to the type of `x`: `&'static ()`
-LL | /     bar(|| {
-LL | |         //~^ ERROR explicit lifetime required in the type of `x` [E0621]
-LL | |         let _ = x;
-LL | |     })
-   | |______^ lifetime `'static` required
-
-error[E0597]: `x` does not live long enough
-  --> $DIR/closure-bounds-static-cant-capture-borrowed.rs:17:17
-   |
-LL |     bar(|| {
-   |         -- value captured here
-LL |         //~^ ERROR explicit lifetime required in the type of `x` [E0621]
-LL |         let _ = x;
-   |                 ^ borrowed value does not live long enough
-LL |     })
-LL | }
-   | - `x` dropped here while still borrowed
-   |
-   = note: borrowed value must be valid for the static lifetime...
-
-error: aborting due to 2 previous errors
-
-Some errors occurred: E0597, E0621.
-For more information about an error, try `rustc --explain E0597`.
diff --git a/src/test/ui/closures/closure-expected-type/expect-region-supply-region.nll.stderr b/src/test/ui/closures/closure-expected-type/expect-region-supply-region.nll.stderr
deleted file mode 100644
index 7f842c40ece5a..0000000000000
--- a/src/test/ui/closures/closure-expected-type/expect-region-supply-region.nll.stderr
+++ /dev/null
@@ -1,34 +0,0 @@
-error: borrowed data escapes outside of closure
-  --> $DIR/expect-region-supply-region.rs:28:9
-   |
-LL |     let mut f: Option<&u32> = None;
-   |         ----- `f` is declared here, outside of the closure body
-LL |     closure_expecting_bound(|x| {
-   |                              - `x` is a reference that is only valid in the closure body
-LL |         f = Some(x); //~ ERROR borrowed data cannot be stored outside of its closure
-   |         ^^^^^^^^^^^ `x` escapes the closure body here
-
-error: borrowed data escapes outside of closure
-  --> $DIR/expect-region-supply-region.rs:38:9
-   |
-LL |     let mut f: Option<&u32> = None;
-   |         ----- `f` is declared here, outside of the closure body
-LL |     closure_expecting_bound(|x: &u32| {
-   |                              - `x` is a reference that is only valid in the closure body
-LL |         f = Some(x); //~ ERROR borrowed data cannot be stored outside of its closure
-   |         ^^^^^^^^^^^ `x` escapes the closure body here
-
-error: borrowed data escapes outside of closure
-  --> $DIR/expect-region-supply-region.rs:52:9
-   |
-LL |     let mut f: Option<&u32> = None;
-   |         ----- `f` is declared here, outside of the closure body
-...
-LL |     closure_expecting_bound(|x: &'x u32| {
-   |                              - `x` is a reference that is only valid in the closure body
-...
-LL |         f = Some(x);
-   |         ^^^^^^^^^^^ `x` escapes the closure body here
-
-error: aborting due to 3 previous errors
-
diff --git a/src/test/ui/consts/min_const_fn/min_const_fn.nll.stderr b/src/test/ui/consts/min_const_fn/min_const_fn.nll.stderr
index a03c5168367db..38937904f47d6 100644
--- a/src/test/ui/consts/min_const_fn/min_const_fn.nll.stderr
+++ b/src/test/ui/consts/min_const_fn/min_const_fn.nll.stderr
@@ -190,7 +190,7 @@ error: trait bounds other than `Sized` on const fn parameters are unstable
 LL | const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }
    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error[E0716]: temporary value dropped while borrowed
+warning[E0716]: temporary value dropped while borrowed
   --> $DIR/min_const_fn.rs:142:64
    |
 LL | const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }
@@ -199,6 +199,9 @@ LL | const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }
    |                                                                creates a temporary which is freed while still in use
    |
    = note: borrowed value must be valid for the static lifetime...
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
 error: trait bounds other than `Sized` on const fn parameters are unstable
   --> $DIR/min_const_fn.rs:147:41
@@ -218,7 +221,7 @@ error: function pointers in const fn are unstable
 LL | const fn no_fn_ptrs2() -> fn() { fn foo() {} foo }
    |                           ^^^^
 
-error: aborting due to 36 previous errors
+error: aborting due to 35 previous errors
 
 Some errors occurred: E0493, E0716.
 For more information about an error, try `rustc --explain E0493`.
diff --git a/src/test/ui/consts/min_const_fn/min_const_fn_dyn.nll.stderr b/src/test/ui/consts/min_const_fn/min_const_fn_dyn.nll.stderr
index 5d071a0fe2405..a1d40cbfd46ad 100644
--- a/src/test/ui/consts/min_const_fn/min_const_fn_dyn.nll.stderr
+++ b/src/test/ui/consts/min_const_fn/min_const_fn_dyn.nll.stderr
@@ -10,7 +10,7 @@ error: trait bounds other than `Sized` on const fn parameters are unstable
 LL | const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }
    |                                                                  ^^
 
-error[E0716]: temporary value dropped while borrowed
+warning[E0716]: temporary value dropped while borrowed
   --> $DIR/min_const_fn_dyn.rs:22:67
    |
 LL | const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }
@@ -19,7 +19,10 @@ LL | const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }
    |                                                                   creates a temporary which is freed while still in use
    |
    = note: borrowed value must be valid for the static lifetime...
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
-error: aborting due to 3 previous errors
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0716`.
diff --git a/src/test/ui/dst/dst-index.nll.stderr b/src/test/ui/dst/dst-index.nll.stderr
index 0aa85d3ed7a3d..d14760b707db2 100644
--- a/src/test/ui/dst/dst-index.nll.stderr
+++ b/src/test/ui/dst/dst-index.nll.stderr
@@ -16,13 +16,31 @@ error[E0507]: cannot move out of borrowed content
 LL |     S[0];
    |     ^^^^ cannot move out of borrowed content
 
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/dst-index.rs:41:5
+   |
+LL |     S[0];
+   |     ^^^^
+   |     |
+   |     cannot move out of data in a `&` reference
+   |     cannot move
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/dst-index.rs:44:5
    |
 LL |     T[0];
    |     ^^^^ cannot move out of borrowed content
 
-error: aborting due to 4 previous errors
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/dst-index.rs:44:5
+   |
+LL |     T[0];
+   |     ^^^^
+   |     |
+   |     cannot move out of data in a `&` reference
+   |     cannot move
+
+error: aborting due to 6 previous errors
 
 Some errors occurred: E0161, E0507.
 For more information about an error, try `rustc --explain E0161`.
diff --git a/src/test/ui/dst/dst-rvalue.nll.stderr b/src/test/ui/dst/dst-rvalue.nll.stderr
index b120da773a24a..537ece48e012c 100644
--- a/src/test/ui/dst/dst-rvalue.nll.stderr
+++ b/src/test/ui/dst/dst-rvalue.nll.stderr
@@ -16,13 +16,33 @@ error[E0507]: cannot move out of borrowed content
 LL |     let _x: Box<str> = box *"hello world";
    |                            ^^^^^^^^^^^^^^ cannot move out of borrowed content
 
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/dst-rvalue.rs:16:28
+   |
+LL |     let _x: Box<str> = box *"hello world";
+   |                            ^^^^^^^^^^^^^^
+   |                            |
+   |                            cannot move out of data in a `&` reference
+   |                            cannot move
+
 error[E0508]: cannot move out of type `[isize]`, a non-copy slice
   --> $DIR/dst-rvalue.rs:21:32
    |
 LL |     let _x: Box<[isize]> = box *array;
    |                                ^^^^^^ cannot move out of here
 
-error: aborting due to 4 previous errors
+error[E0507]: cannot move out of `*array` which is behind a `&` reference
+  --> $DIR/dst-rvalue.rs:21:32
+   |
+LL |     let array: &[isize] = &[1, 2, 3];
+   |                           ---------- help: consider changing this to be a mutable reference: `&mut [1, 2, 3]`
+LL |     let _x: Box<[isize]> = box *array;
+   |                                ^^^^^^
+   |                                |
+   |                                cannot move out of `*array` which is behind a `&` reference
+   |                                `array` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 6 previous errors
 
 Some errors occurred: E0161, E0507, E0508.
 For more information about an error, try `rustc --explain E0161`.
diff --git a/src/test/ui/error-codes/E0507.nll.stderr b/src/test/ui/error-codes/E0507.nll.stderr
new file mode 100644
index 0000000000000..43795e5224ddc
--- /dev/null
+++ b/src/test/ui/error-codes/E0507.nll.stderr
@@ -0,0 +1,18 @@
+error[E0507]: cannot move out of borrowed content
+  --> $DIR/E0507.rs:22:5
+   |
+LL |     x.borrow().nothing_is_true(); //~ ERROR E0507
+   |     ^^^^^^^^^^ cannot move out of borrowed content
+
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/E0507.rs:22:5
+   |
+LL |     x.borrow().nothing_is_true(); //~ ERROR E0507
+   |     ^^^^^^^^^^
+   |     |
+   |     cannot move out of data in a `&` reference
+   |     cannot move
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/error-codes/E0621-does-not-trigger-for-closures.nll.stderr b/src/test/ui/error-codes/E0621-does-not-trigger-for-closures.nll.stderr
deleted file mode 100644
index 65008380f9e17..0000000000000
--- a/src/test/ui/error-codes/E0621-does-not-trigger-for-closures.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/E0621-does-not-trigger-for-closures.rs:25:45
-   |
-LL |     invoke(&x, |a, b| if a > b { a } else { b }); //~ ERROR E0495
-   |                    --                       ^ returning this value requires that `'1` must outlive `'2`
-   |                    ||
-   |                    |return type of closure is &'2 i32
-   |                    has type `&'1 i32`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/existential_types/generic_type_does_not_live_long_enough.nll.stderr b/src/test/ui/existential_types/generic_type_does_not_live_long_enough.nll.stderr
deleted file mode 100644
index 471eda45dafdc..0000000000000
--- a/src/test/ui/existential_types/generic_type_does_not_live_long_enough.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error[E0308]: mismatched types
-  --> $DIR/generic_type_does_not_live_long_enough.rs:16:18
-   |
-LL |     let z: i32 = x; //~ ERROR mismatched types
-   |                  ^ expected i32, found opaque type
-   |
-   = note: expected type `i32`
-              found type `WrongGeneric::<&{integer}>`
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0308`.
diff --git a/src/test/ui/hr-subtype/hr-subtype.free_inv_x_vs_free_inv_y.nll.stderr b/src/test/ui/hr-subtype/hr-subtype.free_inv_x_vs_free_inv_y.nll.stderr
deleted file mode 100644
index cadb552697e65..0000000000000
--- a/src/test/ui/hr-subtype/hr-subtype.free_inv_x_vs_free_inv_y.nll.stderr
+++ /dev/null
@@ -1,30 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/hr-subtype.rs:43:13
-   |
-LL |           fn subtype<'x,'y:'x,'z:'y>() {
-   |                      -- -- lifetime `'y` defined here
-   |                      |
-   |                      lifetime `'x` defined here
-LL |               gimme::<$t2>(None::<$t1>);
-   |               ^^^^^^^^^^^^^^^^^^^^^^^^^ argument requires that `'x` must outlive `'y`
-...
-LL | / check! { free_inv_x_vs_free_inv_y: (fn(Inv<'x>),
-LL | |                                     fn(Inv<'y>)) }
-   | |__________________________________________________- in this macro invocation
-
-error: unsatisfied lifetime constraints
-  --> $DIR/hr-subtype.rs:49:13
-   |
-LL |           fn supertype<'x,'y:'x,'z:'y>() {
-   |                        -- -- lifetime `'y` defined here
-   |                        |
-   |                        lifetime `'x` defined here
-LL |               gimme::<$t1>(None::<$t2>);
-   |               ^^^^^^^^^^^^^^^^^^^^^^^^^ argument requires that `'x` must outlive `'y`
-...
-LL | / check! { free_inv_x_vs_free_inv_y: (fn(Inv<'x>),
-LL | |                                     fn(Inv<'y>)) }
-   | |__________________________________________________- in this macro invocation
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/hr-subtype/hr-subtype.free_x_vs_free_y.nll.stderr b/src/test/ui/hr-subtype/hr-subtype.free_x_vs_free_y.nll.stderr
deleted file mode 100644
index c1bcd146b3489..0000000000000
--- a/src/test/ui/hr-subtype/hr-subtype.free_x_vs_free_y.nll.stderr
+++ /dev/null
@@ -1,16 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/hr-subtype.rs:49:13
-   |
-LL |           fn supertype<'x,'y:'x,'z:'y>() {
-   |                        -- -- lifetime `'y` defined here
-   |                        |
-   |                        lifetime `'x` defined here
-LL |               gimme::<$t1>(None::<$t2>);
-   |               ^^^^^^^^^^^^^^^^^^^^^^^^^ argument requires that `'x` must outlive `'y`
-...
-LL | / check! { free_x_vs_free_y: (fn(&'x u32),
-LL | |                             fn(&'y u32)) }
-   | |__________________________________________- in this macro invocation
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/impl-header-lifetime-elision/dyn-trait.nll.stderr b/src/test/ui/impl-header-lifetime-elision/dyn-trait.nll.stderr
deleted file mode 100644
index 45ee808950e25..0000000000000
--- a/src/test/ui/impl-header-lifetime-elision/dyn-trait.nll.stderr
+++ /dev/null
@@ -1,10 +0,0 @@
-error: borrowed data escapes outside of function
-  --> $DIR/dyn-trait.rs:32:5
-   |
-LL | fn with_dyn_debug_static<'a>(x: Box<dyn Debug + 'a>) {
-   |                              - `x` is a reference that is only valid in the function body
-LL |     static_val(x); //~ ERROR cannot infer
-   |     ^^^^^^^^^^^^^ `x` escapes the function body here
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/impl-trait/must_outlive_least_region_or_bound.nll.stderr b/src/test/ui/impl-trait/must_outlive_least_region_or_bound.nll.stderr
deleted file mode 100644
index 485d35662445d..0000000000000
--- a/src/test/ui/impl-trait/must_outlive_least_region_or_bound.nll.stderr
+++ /dev/null
@@ -1,49 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `x`
-  --> $DIR/must_outlive_least_region_or_bound.rs:13:35
-   |
-LL | fn elided(x: &i32) -> impl Copy { x }
-   |              ----                 ^ lifetime `'static` required
-   |              |
-   |              help: add explicit lifetime `'static` to the type of `x`: `&'static i32`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/must_outlive_least_region_or_bound.rs:16:44
-   |
-LL | fn explicit<'a>(x: &'a i32) -> impl Copy { x }
-   |             -- lifetime `'a` defined here  ^ returning this value requires that `'a` must outlive `'static`
-help: to allow this impl Trait to capture borrowed data with lifetime `'a`, add `'a` as a constraint
-   |
-LL | fn explicit<'a>(x: &'a i32) -> impl Copy + 'a { x }
-   |                                ^^^^^^^^^^^^^^
-
-error: unsatisfied lifetime constraints
-  --> $DIR/must_outlive_least_region_or_bound.rs:22:69
-   |
-LL | fn with_bound<'a>(x: &'a i32) -> impl LifetimeTrait<'a> + 'static { x }
-   |               -- lifetime `'a` defined here                         ^ returning this value requires that `'a` must outlive `'static`
-   |
-   = help: consider replacing `'a` with `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/must_outlive_least_region_or_bound.rs:29:5
-   |
-LL | fn move_lifetime_into_fn<'a, 'b>(x: &'a u32, y: &'b u32) -> impl Fn(&'a u32) {
-   |                          --  -- lifetime `'b` defined here
-   |                          |
-   |                          lifetime `'a` defined here
-LL |     //~^ ERROR lifetime mismatch
-LL |     move |_| println!("{}", y)
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'b`
-
-error[E0310]: the parameter type `T` may not live long enough
-  --> $DIR/must_outlive_least_region_or_bound.rs:32:51
-   |
-LL | fn ty_param_wont_outlive_static<T:Debug>(x: T) -> impl Debug + 'static {
-   |                                                   ^^^^^^^^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `T: 'static`...
-
-error: aborting due to 5 previous errors
-
-Some errors occurred: E0310, E0621.
-For more information about an error, try `rustc --explain E0310`.
diff --git a/src/test/ui/impl-trait/static-return-lifetime-infered.nll.stderr b/src/test/ui/impl-trait/static-return-lifetime-infered.nll.stderr
deleted file mode 100644
index 7e9aa90c6c50c..0000000000000
--- a/src/test/ui/impl-trait/static-return-lifetime-infered.nll.stderr
+++ /dev/null
@@ -1,26 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/static-return-lifetime-infered.rs:17:9
-   |
-LL |     fn iter_values_anon(&self) -> impl Iterator<Item=u32> {
-   |                         - let's call the lifetime of this reference `'1`
-LL |         self.x.iter().map(|a| a.0)
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ returning this value requires that `'1` must outlive `'static`
-help: to allow this impl Trait to capture borrowed data with lifetime `'1`, add `'_` as a constraint
-   |
-LL |     fn iter_values_anon(&self) -> impl Iterator<Item=u32> + '_ {
-   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-error: unsatisfied lifetime constraints
-  --> $DIR/static-return-lifetime-infered.rs:21:9
-   |
-LL |     fn iter_values<'a>(&'a self) -> impl Iterator<Item=u32> {
-   |                    -- lifetime `'a` defined here
-LL |         self.x.iter().map(|a| a.0)
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ returning this value requires that `'a` must outlive `'static`
-help: to allow this impl Trait to capture borrowed data with lifetime `'a`, add `'a` as a constraint
-   |
-LL |     fn iter_values<'a>(&'a self) -> impl Iterator<Item=u32> + 'a {
-   |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/impl-trait/type_parameters_captured.nll.stderr b/src/test/ui/impl-trait/type_parameters_captured.nll.stderr
deleted file mode 100644
index 18258ef1f9dc9..0000000000000
--- a/src/test/ui/impl-trait/type_parameters_captured.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error[E0310]: the parameter type `T` may not live long enough
-  --> $DIR/type_parameters_captured.rs:17:20
-   |
-LL | fn foo<T>(x: T) -> impl Any + 'static {
-   |                    ^^^^^^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `T: 'static`...
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0310`.
diff --git a/src/test/ui/in-band-lifetimes/mismatched.nll.stderr b/src/test/ui/in-band-lifetimes/mismatched.nll.stderr
deleted file mode 100644
index c8b2f849b32a7..0000000000000
--- a/src/test/ui/in-band-lifetimes/mismatched.nll.stderr
+++ /dev/null
@@ -1,20 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `y`
-  --> $DIR/mismatched.rs:14:42
-   |
-LL | fn foo(x: &'a u32, y: &u32) -> &'a u32 { y } //~ ERROR explicit lifetime required
-   |                       ----               ^ lifetime `'a` required
-   |                       |
-   |                       help: add explicit lifetime `'a` to the type of `y`: `&'a u32`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/mismatched.rs:16:46
-   |
-LL | fn foo2(x: &'a u32, y: &'b u32) -> &'a u32 { y } //~ ERROR lifetime mismatch
-   |             --          --                   ^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'b`
-   |             |           |
-   |             |           lifetime `'b` defined here
-   |             lifetime `'a` defined here
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/issues/issue-10291.nll.stderr b/src/test/ui/issues/issue-10291.nll.stderr
deleted file mode 100644
index a21336654f379..0000000000000
--- a/src/test/ui/issues/issue-10291.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/issue-10291.rs:13:9
-   |
-LL | fn test<'x>(x: &'x isize) {
-   |         -- lifetime `'x` defined here
-LL |     drop::<Box<for<'z> FnMut(&'z isize) -> &'z isize>>(Box::new(|z| {
-LL |         x //~ ERROR E0312
-   |         ^ returning this value requires that `'x` must outlive `'static`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/issues/issue-12567.nll.stderr b/src/test/ui/issues/issue-12567.nll.stderr
index 72d21d47d86fa..bb844c4a69f22 100644
--- a/src/test/ui/issues/issue-12567.nll.stderr
+++ b/src/test/ui/issues/issue-12567.nll.stderr
@@ -40,6 +40,43 @@ LL |         (&[], &[hd, ..]) | (&[hd, ..], &[])
 LL |         (&[hd1, ..], &[hd2, ..])
    |            ^^^
 
-error: aborting due to 2 previous errors
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/issue-12567.rs:16:17
+   |
+LL |         (&[], &[hd, ..]) | (&[hd, ..], &[])
+   |                 ^^
+   |                 |
+   |                 cannot move out of data in a `&` reference
+   |                 cannot move
+
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/issue-12567.rs:16:31
+   |
+LL |         (&[], &[hd, ..]) | (&[hd, ..], &[])
+   |                               ^^
+   |                               |
+   |                               cannot move out of data in a `&` reference
+   |                               cannot move
+
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/issue-12567.rs:20:12
+   |
+LL |         (&[hd1, ..], &[hd2, ..])
+   |            ^^^
+   |            |
+   |            cannot move out of data in a `&` reference
+   |            cannot move
+
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/issue-12567.rs:20:24
+   |
+LL |         (&[hd1, ..], &[hd2, ..])
+   |                        ^^^
+   |                        |
+   |                        cannot move out of data in a `&` reference
+   |                        cannot move
+
+error: aborting due to 6 previous errors
 
-For more information about this error, try `rustc --explain E0508`.
+Some errors occurred: E0507, E0508.
+For more information about an error, try `rustc --explain E0507`.
diff --git a/src/test/ui/issues/issue-13058.nll.stderr b/src/test/ui/issues/issue-13058.nll.stderr
deleted file mode 100644
index 0d641ec8e891a..0000000000000
--- a/src/test/ui/issues/issue-13058.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `cont`
-  --> $DIR/issue-13058.rs:24:21
-   |
-LL | fn check<'r, I: Iterator<Item=usize>, T: Itble<'r, usize, I>>(cont: &T) -> bool
-   |                                                                     -- help: add explicit lifetime `'r` to the type of `cont`: `&'r T`
-LL | {
-LL |     let cont_iter = cont.iter();
-   |                     ^^^^^^^^^^^ lifetime `'r` required
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/issues/issue-15034.nll.stderr b/src/test/ui/issues/issue-15034.nll.stderr
deleted file mode 100644
index aa5ceabfb1174..0000000000000
--- a/src/test/ui/issues/issue-15034.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `lexer`
-  --> $DIR/issue-15034.rs:27:9
-   |
-LL |     pub fn new(lexer: &'a mut Lexer) -> Parser<'a> {
-   |                       ------------- help: add explicit lifetime `'a` to the type of `lexer`: `&'a mut Lexer<'a>`
-LL |         Parser { lexer: lexer }
-   |         ^^^^^^^^^^^^^^^^^^^^^^^ lifetime `'a` required
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/issues/issue-16683.nll.stderr b/src/test/ui/issues/issue-16683.nll.stderr
deleted file mode 100644
index 29d9948f61a42..0000000000000
--- a/src/test/ui/issues/issue-16683.nll.stderr
+++ /dev/null
@@ -1,10 +0,0 @@
-error: borrowed data escapes outside of function
-  --> $DIR/issue-16683.rs:14:9
-   |
-LL |     fn b(&self) {
-   |          ----- `self` is a reference that is only valid in the function body
-LL |         self.a(); //~ ERROR cannot infer
-   |         ^^^^^^^^ `self` escapes the function body here
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/issues/issue-17718-static-move.nll.stderr b/src/test/ui/issues/issue-17718-static-move.nll.stderr
index f8da3c3d5989e..66fba7749f479 100644
--- a/src/test/ui/issues/issue-17718-static-move.nll.stderr
+++ b/src/test/ui/issues/issue-17718-static-move.nll.stderr
@@ -7,6 +7,15 @@ LL |     let _a = FOO; //~ ERROR: cannot move out of static item
    |              cannot move out of static item
    |              help: consider borrowing here: `&FOO`
 
-error: aborting due to previous error
+error[E0507]: cannot move out of immutable static item `FOO`
+  --> $DIR/issue-17718-static-move.rs:16:14
+   |
+LL |     let _a = FOO; //~ ERROR: cannot move out of static item
+   |              ^^^
+   |              |
+   |              cannot move out of immutable static item `FOO`
+   |              cannot move
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/issues/issue-17728.nll.stderr b/src/test/ui/issues/issue-17728.nll.stderr
deleted file mode 100644
index 2cb6f831d8568..0000000000000
--- a/src/test/ui/issues/issue-17728.nll.stderr
+++ /dev/null
@@ -1,19 +0,0 @@
-error[E0308]: match arms have incompatible types
-  --> $DIR/issue-17728.rs:110:5
-   |
-LL | /     match to_parse { //~ ERROR match arms have incompatible types
-LL | |         "w" | "west" => RoomDirection::West,
-LL | |         "e" | "east" => RoomDirection::East,
-LL | |         "n" | "north" => RoomDirection::North,
-...  |
-LL | |         _ => None
-   | |              ---- match arm with an incompatible type
-LL | |     }
-   | |_____^ expected enum `RoomDirection`, found enum `std::option::Option`
-   |
-   = note: expected type `RoomDirection`
-              found type `std::option::Option<_>`
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0308`.
diff --git a/src/test/ui/issues/issue-17758.nll.stderr b/src/test/ui/issues/issue-17758.nll.stderr
deleted file mode 100644
index 87e01ace64a1b..0000000000000
--- a/src/test/ui/issues/issue-17758.nll.stderr
+++ /dev/null
@@ -1,10 +0,0 @@
-error: borrowed data escapes outside of function
-  --> $DIR/issue-17758.rs:17:9
-   |
-LL |     fn bar(&self) {
-   |            ----- `self` is a reference that is only valid in the function body
-LL |         self.foo();
-   |         ^^^^^^^^^^ `self` escapes the function body here
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/issues/issue-20801.nll.stderr b/src/test/ui/issues/issue-20801.nll.stderr
index 362778b26c861..60e3056b8c4d4 100644
--- a/src/test/ui/issues/issue-20801.nll.stderr
+++ b/src/test/ui/issues/issue-20801.nll.stderr
@@ -16,6 +16,15 @@ LL |     let b = unsafe { *imm_ref() };
    |                      cannot move out of borrowed content
    |                      help: consider removing the `*`: `imm_ref()`
 
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/issue-20801.rs:39:22
+   |
+LL |     let b = unsafe { *imm_ref() };
+   |                      ^^^^^^^^^^
+   |                      |
+   |                      cannot move out of data in a `&` reference
+   |                      cannot move
+
 error[E0507]: cannot move out of dereference of raw pointer
   --> $DIR/issue-20801.rs:42:22
    |
@@ -34,6 +43,15 @@ LL |     let d = unsafe { *const_ptr() };
    |                      cannot move out of dereference of raw pointer
    |                      help: consider removing the `*`: `const_ptr()`
 
-error: aborting due to 4 previous errors
+error[E0507]: cannot move out of data in a `*const` pointer
+  --> $DIR/issue-20801.rs:45:22
+   |
+LL |     let d = unsafe { *const_ptr() };
+   |                      ^^^^^^^^^^^^
+   |                      |
+   |                      cannot move out of data in a `*const` pointer
+   |                      cannot move
+
+error: aborting due to 6 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/issues/issue-2590.nll.stderr b/src/test/ui/issues/issue-2590.nll.stderr
index fa2df26498a06..ae726d26d072b 100644
--- a/src/test/ui/issues/issue-2590.nll.stderr
+++ b/src/test/ui/issues/issue-2590.nll.stderr
@@ -4,6 +4,17 @@ error[E0507]: cannot move out of borrowed content
 LL |         self.tokens //~ ERROR cannot move out of borrowed content
    |         ^^^^^^^^^^^ cannot move out of borrowed content
 
-error: aborting due to previous error
+error[E0507]: cannot move out of `self.tokens` which is behind a `&` reference
+  --> $DIR/issue-2590.rs:22:9
+   |
+LL |     fn parse(&self) -> Vec<isize> {
+   |              ----- help: consider changing this to be a mutable reference: `&mut self`
+LL |         self.tokens //~ ERROR cannot move out of borrowed content
+   |         ^^^^^^^^^^^
+   |         |
+   |         cannot move out of `self.tokens` which is behind a `&` reference
+   |         `self` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/issues/issue-26217.nll.stderr b/src/test/ui/issues/issue-26217.nll.stderr
deleted file mode 100644
index f28b065409906..0000000000000
--- a/src/test/ui/issues/issue-26217.nll.stderr
+++ /dev/null
@@ -1,9 +0,0 @@
-error[E0131]: `main` function is not allowed to have generic parameters
-  --> $DIR/issue-26217.rs:13:8
-   |
-LL | fn main<'a>() {
-   |        ^^^^ `main` cannot have generic parameters
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0131`.
diff --git a/src/test/ui/issues/issue-30355.nll.stderr b/src/test/ui/issues/issue-30355.nll.stderr
index fdf8157dcf833..78cf3661bb763 100644
--- a/src/test/ui/issues/issue-30355.nll.stderr
+++ b/src/test/ui/issues/issue-30355.nll.stderr
@@ -16,7 +16,16 @@ error[E0508]: cannot move out of type `[u8]`, a non-copy slice
 LL |     &X(*Y)
    |        ^^ cannot move out of here
 
-error: aborting due to 3 previous errors
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/issue-30355.rs:15:8
+   |
+LL |     &X(*Y)
+   |        ^^
+   |        |
+   |        cannot move out of data in a `&` reference
+   |        cannot move
+
+error: aborting due to 4 previous errors
 
-Some errors occurred: E0161, E0508.
+Some errors occurred: E0161, E0507, E0508.
 For more information about an error, try `rustc --explain E0161`.
diff --git a/src/test/ui/issues/issue-40288-2.nll.stderr b/src/test/ui/issues/issue-40288-2.nll.stderr
deleted file mode 100644
index e15e4e86dbcbf..0000000000000
--- a/src/test/ui/issues/issue-40288-2.nll.stderr
+++ /dev/null
@@ -1,21 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `y`
-  --> $DIR/issue-40288-2.rs:17:9
-   |
-LL | fn lifetime_transmute_slice<'a, T: ?Sized>(x: &'a T, y: &T) -> &'a T {
-   |                                                         -- help: add explicit lifetime `'a` to the type of `y`: `&'a T`
-...
-LL |         slice[0] = y;
-   |         ^^^^^^^^^^^^ lifetime `'a` required
-
-error[E0621]: explicit lifetime required in the type of `y`
-  --> $DIR/issue-40288-2.rs:32:9
-   |
-LL | fn lifetime_transmute_struct<'a, T: ?Sized>(x: &'a T, y: &T) -> &'a T {
-   |                                                          -- help: add explicit lifetime `'a` to the type of `y`: `&'a T`
-...
-LL |         dst.head = y;
-   |         ^^^^^^^^^^^^ lifetime `'a` required
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/issues/issue-40402-ref-hints/issue-40402-1.nll.stderr b/src/test/ui/issues/issue-40402-ref-hints/issue-40402-1.nll.stderr
index 9020d3778c373..22fcffb9527a4 100644
--- a/src/test/ui/issues/issue-40402-ref-hints/issue-40402-1.nll.stderr
+++ b/src/test/ui/issues/issue-40402-ref-hints/issue-40402-1.nll.stderr
@@ -7,6 +7,15 @@ LL |     let e = f.v[0]; //~ ERROR cannot move out of indexed content
    |             cannot move out of borrowed content
    |             help: consider borrowing here: `&f.v[0]`
 
-error: aborting due to previous error
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/issue-40402-1.rs:19:13
+   |
+LL |     let e = f.v[0]; //~ ERROR cannot move out of indexed content
+   |             ^^^^^^
+   |             |
+   |             cannot move out of data in a `&` reference
+   |             cannot move
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/issues/issue-40402-ref-hints/issue-40402-2.nll.stderr b/src/test/ui/issues/issue-40402-ref-hints/issue-40402-2.nll.stderr
index a80e9a5fe091f..cdb547ad10064 100644
--- a/src/test/ui/issues/issue-40402-ref-hints/issue-40402-2.nll.stderr
+++ b/src/test/ui/issues/issue-40402-ref-hints/issue-40402-2.nll.stderr
@@ -1,3 +1,21 @@
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/issue-40402-2.rs:15:10
+   |
+LL |     let (a, b) = x[0]; //~ ERROR cannot move out of indexed content
+   |          ^
+   |          |
+   |          cannot move out of data in a `&` reference
+   |          cannot move
+
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/issue-40402-2.rs:15:13
+   |
+LL |     let (a, b) = x[0]; //~ ERROR cannot move out of indexed content
+   |             ^
+   |             |
+   |             cannot move out of data in a `&` reference
+   |             cannot move
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/issue-40402-2.rs:15:18
    |
@@ -15,6 +33,6 @@ note: move occurs because these variables have types that don't implement the `C
 LL |     let (a, b) = x[0]; //~ ERROR cannot move out of indexed content
    |          ^  ^
 
-error: aborting due to previous error
+error: aborting due to 3 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/issues/issue-40510-1.nll.stderr b/src/test/ui/issues/issue-40510-1.nll.stderr
index 1aeb1a89ead94..ee8fdc16a06f4 100644
--- a/src/test/ui/issues/issue-40510-1.nll.stderr
+++ b/src/test/ui/issues/issue-40510-1.nll.stderr
@@ -1,4 +1,4 @@
-error: captured variable cannot escape `FnMut` closure body
+warning: captured variable cannot escape `FnMut` closure body
   --> $DIR/issue-40510-1.rs:18:9
    |
 LL |     || {
@@ -8,6 +8,15 @@ LL |         &mut x
    |
    = note: `FnMut` closures only have access to their captured variables while they are executing...
    = note: ...therefore, they cannot allow references to captured variables to escape
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
+
+error: compilation successful
+  --> $DIR/issue-40510-1.rs:23:1
+   |
+LL | fn main() {} //~ ERROR compilation successful
+   | ^^^^^^^^^^^^
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/issues/issue-40510-3.nll.stderr b/src/test/ui/issues/issue-40510-3.nll.stderr
index c334e592fbc2b..37a00746a88c2 100644
--- a/src/test/ui/issues/issue-40510-3.nll.stderr
+++ b/src/test/ui/issues/issue-40510-3.nll.stderr
@@ -1,4 +1,4 @@
-error: captured variable cannot escape `FnMut` closure body
+warning: captured variable cannot escape `FnMut` closure body
   --> $DIR/issue-40510-3.rs:18:9
    |
 LL |       || {
@@ -10,6 +10,15 @@ LL | |         }
    |
    = note: `FnMut` closures only have access to their captured variables while they are executing...
    = note: ...therefore, they cannot allow references to captured variables to escape
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
+
+error: compilation successful
+  --> $DIR/issue-40510-3.rs:25:1
+   |
+LL | fn main() {} //~ ERROR compilation successful
+   | ^^^^^^^^^^^^
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/issues/issue-4335.nll.stderr b/src/test/ui/issues/issue-4335.nll.stderr
index a9345e86f7248..fb123de213928 100644
--- a/src/test/ui/issues/issue-4335.nll.stderr
+++ b/src/test/ui/issues/issue-4335.nll.stderr
@@ -6,6 +6,15 @@ LL | fn f<'r, T>(v: &'r T) -> Box<FnMut() -> T + 'r> {
 LL |     id(Box::new(|| *v))
    |                    ^^ cannot move out of captured variable in an `FnMut` closure
 
+error[E0507]: cannot move out of `*v` which is behind a `&` reference
+  --> $DIR/issue-4335.rs:16:20
+   |
+LL |     id(Box::new(|| *v))
+   |                    ^^
+   |                    |
+   |                    cannot move out of `*v` which is behind a `&` reference
+   |                    cannot move
+
 error[E0597]: `v` does not live long enough
   --> $DIR/issue-4335.rs:16:21
    |
@@ -23,7 +32,7 @@ note: borrowed value must be valid for the lifetime 'r as defined on the functio
 LL | fn f<'r, T>(v: &'r T) -> Box<FnMut() -> T + 'r> {
    |      ^^
 
-error: aborting due to 2 previous errors
+error: aborting due to 3 previous errors
 
 Some errors occurred: E0507, E0597.
 For more information about an error, try `rustc --explain E0507`.
diff --git a/src/test/ui/issues/issue-49824.nll.stderr b/src/test/ui/issues/issue-49824.nll.stderr
index 2e0463fdd1d86..555558c99d933 100644
--- a/src/test/ui/issues/issue-49824.nll.stderr
+++ b/src/test/ui/issues/issue-49824.nll.stderr
@@ -1,4 +1,4 @@
-error: captured variable cannot escape `FnMut` closure body
+warning: captured variable cannot escape `FnMut` closure body
   --> $DIR/issue-49824.rs:22:9
    |
 LL |       || {
@@ -10,6 +10,21 @@ LL | |         }
    |
    = note: `FnMut` closures only have access to their captured variables while they are executing...
    = note: ...therefore, they cannot allow references to captured variables to escape
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
+
+error: compilation successful
+  --> $DIR/issue-49824.rs:18:1
+   |
+LL | / fn main() {
+LL | |     //~^ compilation successful
+LL | |     let mut x = 0;
+LL | |     || {
+...  |
+LL | |     };
+LL | | }
+   | |_^
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/issues/issue-52213.nll.stderr b/src/test/ui/issues/issue-52213.nll.stderr
deleted file mode 100644
index dab3fd866ba64..0000000000000
--- a/src/test/ui/issues/issue-52213.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/issue-52213.rs:13:20
-   |
-LL | fn transmute_lifetime<'a, 'b, T>(t: &'a (T,)) -> &'b T {
-   |                       --  -- lifetime `'b` defined here
-   |                       |
-   |                       lifetime `'a` defined here
-LL |     match (&t,) { //~ ERROR cannot infer an appropriate lifetime
-LL |         ((u,),) => u,
-   |                    ^ returning this value requires that `'a` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/issues/issue-52533-1.nll.stderr b/src/test/ui/issues/issue-52533-1.nll.stderr
deleted file mode 100644
index cc5f4df79f8f5..0000000000000
--- a/src/test/ui/issues/issue-52533-1.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/issue-52533-1.rs:19:18
-   |
-LL |     gimme(|x, y| y)
-   |            -  -  ^ closure was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1`
-   |            |  |
-   |            |  has type `&Foo<'_, '1, u32>`
-   |            has type `&Foo<'_, '2, u32>`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/issues/issue-52533.nll.stderr b/src/test/ui/issues/issue-52533.nll.stderr
deleted file mode 100644
index 37ab2a3b84d2f..0000000000000
--- a/src/test/ui/issues/issue-52533.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/issue-52533.rs:15:16
-   |
-LL |     foo(|a, b| b)
-   |          -  -  ^ closure was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1`
-   |          |  |
-   |          |  has type `&'1 u32`
-   |          has type `&'2 u32`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/kindck/kindck-impl-type-params.nll.stderr b/src/test/ui/kindck/kindck-impl-type-params.nll.stderr
deleted file mode 100644
index d484632f4c34e..0000000000000
--- a/src/test/ui/kindck/kindck-impl-type-params.nll.stderr
+++ /dev/null
@@ -1,63 +0,0 @@
-error[E0277]: `T` cannot be sent between threads safely
-  --> $DIR/kindck-impl-type-params.rs:28:13
-   |
-LL |     let a = &t as &Gettable<T>;
-   |             ^^ `T` cannot be sent between threads safely
-   |
-   = help: the trait `std::marker::Send` is not implemented for `T`
-   = help: consider adding a `where T: std::marker::Send` bound
-   = note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
-   = note: required for the cast to the object type `dyn Gettable<T>`
-
-error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
-  --> $DIR/kindck-impl-type-params.rs:28:13
-   |
-LL |     let a = &t as &Gettable<T>;
-   |             ^^ the trait `std::marker::Copy` is not implemented for `T`
-   |
-   = help: consider adding a `where T: std::marker::Copy` bound
-   = note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
-   = note: required for the cast to the object type `dyn Gettable<T>`
-
-error[E0277]: `T` cannot be sent between threads safely
-  --> $DIR/kindck-impl-type-params.rs:35:27
-   |
-LL |     let a: &Gettable<T> = &t;
-   |                           ^^ `T` cannot be sent between threads safely
-   |
-   = help: the trait `std::marker::Send` is not implemented for `T`
-   = help: consider adding a `where T: std::marker::Send` bound
-   = note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
-   = note: required for the cast to the object type `dyn Gettable<T>`
-
-error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
-  --> $DIR/kindck-impl-type-params.rs:35:27
-   |
-LL |     let a: &Gettable<T> = &t;
-   |                           ^^ the trait `std::marker::Copy` is not implemented for `T`
-   |
-   = help: consider adding a `where T: std::marker::Copy` bound
-   = note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
-   = note: required for the cast to the object type `dyn Gettable<T>`
-
-error[E0277]: the trait bound `std::string::String: std::marker::Copy` is not satisfied
-  --> $DIR/kindck-impl-type-params.rs:48:13
-   |
-LL |     let a = t as Box<Gettable<String>>;
-   |             ^ the trait `std::marker::Copy` is not implemented for `std::string::String`
-   |
-   = note: required because of the requirements on the impl of `Gettable<std::string::String>` for `S<std::string::String>`
-   = note: required for the cast to the object type `dyn Gettable<std::string::String>`
-
-error[E0277]: the trait bound `foo3::Foo: std::marker::Copy` is not satisfied
-  --> $DIR/kindck-impl-type-params.rs:56:33
-   |
-LL |     let a: Box<Gettable<Foo>> = t;
-   |                                 ^ the trait `std::marker::Copy` is not implemented for `foo3::Foo`
-   |
-   = note: required because of the requirements on the impl of `Gettable<foo3::Foo>` for `S<foo3::Foo>`
-   = note: required for the cast to the object type `dyn Gettable<foo3::Foo>`
-
-error: aborting due to 6 previous errors
-
-For more information about this error, try `rustc --explain E0277`.
diff --git a/src/test/ui/kindck/kindck-send-object1.nll.stderr b/src/test/ui/kindck/kindck-send-object1.nll.stderr
deleted file mode 100644
index a45ba157bf9a3..0000000000000
--- a/src/test/ui/kindck/kindck-send-object1.nll.stderr
+++ /dev/null
@@ -1,32 +0,0 @@
-error[E0277]: `(dyn Dummy + 'a)` cannot be shared between threads safely
-  --> $DIR/kindck-send-object1.rs:20:5
-   |
-LL |     assert_send::<&'a Dummy>();
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^ `(dyn Dummy + 'a)` cannot be shared between threads safely
-   |
-   = help: the trait `std::marker::Sync` is not implemented for `(dyn Dummy + 'a)`
-   = note: required because of the requirements on the impl of `std::marker::Send` for `&'a (dyn Dummy + 'a)`
-note: required by `assert_send`
-  --> $DIR/kindck-send-object1.rs:15:1
-   |
-LL | fn assert_send<T:Send+'static>() { }
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-error[E0277]: `(dyn Dummy + 'a)` cannot be sent between threads safely
-  --> $DIR/kindck-send-object1.rs:39:5
-   |
-LL |     assert_send::<Box<Dummy+'a>>();
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `(dyn Dummy + 'a)` cannot be sent between threads safely
-   |
-   = help: the trait `std::marker::Send` is not implemented for `(dyn Dummy + 'a)`
-   = note: required because of the requirements on the impl of `std::marker::Send` for `std::ptr::Unique<(dyn Dummy + 'a)>`
-   = note: required because it appears within the type `std::boxed::Box<(dyn Dummy + 'a)>`
-note: required by `assert_send`
-  --> $DIR/kindck-send-object1.rs:15:1
-   |
-LL | fn assert_send<T:Send+'static>() { }
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0277`.
diff --git a/src/test/ui/lifetimes/lifetime-bound-will-change-warning.nll.stderr b/src/test/ui/lifetimes/lifetime-bound-will-change-warning.nll.stderr
deleted file mode 100644
index bc15df264cc3b..0000000000000
--- a/src/test/ui/lifetimes/lifetime-bound-will-change-warning.nll.stderr
+++ /dev/null
@@ -1,20 +0,0 @@
-error: borrowed data escapes outside of function
-  --> $DIR/lifetime-bound-will-change-warning.rs:44:5
-   |
-LL | fn test2<'a>(x: &'a Box<Fn()+'a>) {
-   |              - `x` is a reference that is only valid in the function body
-LL |     // but ref_obj will not, so warn.
-LL |     ref_obj(x) //~ ERROR mismatched types
-   |     ^^^^^^^^^^ `x` escapes the function body here
-
-error: borrowed data escapes outside of function
-  --> $DIR/lifetime-bound-will-change-warning.rs:49:5
-   |
-LL | fn test2cc<'a>(x: &'a Box<Fn()+'a>) {
-   |                - `x` is a reference that is only valid in the function body
-LL |     // same as test2, but cross crate
-LL |     lib::ref_obj(x) //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^ `x` escapes the function body here
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-if-else-using-impl.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-if-else-using-impl.nll.stderr
deleted file mode 100644
index 4e3193ccbfd5c..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-if-else-using-impl.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex1-return-one-existing-name-if-else-using-impl.rs:21:20
-   |
-LL |     fn foo<'a>(x: &i32, y: &'a i32) -> &'a i32 {
-   |            --     - let's call the lifetime of this reference `'1`
-   |            |
-   |            lifetime `'a` defined here
-LL | 
-LL |         if x > y { x } else { y } //~ ERROR lifetime mismatch
-   |                    ^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'1`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-return-type-is-anon.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-return-type-is-anon.nll.stderr
deleted file mode 100644
index 3413203fa7f06..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-return-type-is-anon.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex1-return-one-existing-name-return-type-is-anon.rs:18:5
-   |
-LL |   fn foo<'a>(&self, x: &'a i32) -> &i32 {
-   |          --  - let's call the lifetime of this reference `'1`
-   |          |
-   |          lifetime `'a` defined here
-LL | 
-LL |     x //~ ERROR lifetime mismatch
-   |     ^ function was supposed to return data with lifetime `'1` but it is returning data with lifetime `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-self-is-anon.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-self-is-anon.nll.stderr
deleted file mode 100644
index 239419967f6c1..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex1-return-one-existing-name-self-is-anon.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex1-return-one-existing-name-self-is-anon.rs:18:30
-   |
-LL |     fn foo<'a>(&self, x: &'a Foo) -> &'a Foo {
-   |            --  - let's call the lifetime of this reference `'1`
-   |            |
-   |            lifetime `'a` defined here
-LL | 
-LL |         if true { x } else { self } //~ ERROR lifetime mismatch
-   |                              ^^^^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'1`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name-2.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name-2.nll.stderr
deleted file mode 100644
index 709d9f84db3f9..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name-2.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `x`
-  --> $DIR/ex2a-push-one-existing-name-2.rs:16:5
-   |
-LL | fn foo<'a>(x: Ref<i32>, y: &mut Vec<Ref<'a, i32>>) {
-   |               -------- help: add explicit lifetime `'a` to the type of `x`: `Ref<'a, i32>`
-LL |     y.push(x); //~ ERROR explicit lifetime
-   |     ^^^^^^^^^ lifetime `'a` required
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name-early-bound.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name-early-bound.nll.stderr
deleted file mode 100644
index 1e608fe16e413..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name-early-bound.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `y`
-  --> $DIR/ex2a-push-one-existing-name-early-bound.rs:17:5
-   |
-LL | fn baz<'a, 'b, T>(x: &mut Vec<&'a T>, y: &T)
-   |                                          -- help: add explicit lifetime `'a` to the type of `y`: `&'a T`
-...
-LL |     x.push(y); //~ ERROR explicit lifetime required
-   |     ^^^^^^^^^ lifetime `'a` required
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name.nll.stderr
deleted file mode 100644
index 1419435209395..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex2a-push-one-existing-name.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `y`
-  --> $DIR/ex2a-push-one-existing-name.rs:16:5
-   |
-LL | fn foo<'a>(x: &mut Vec<Ref<'a, i32>>, y: Ref<i32>) {
-   |                                          -------- help: add explicit lifetime `'a` to the type of `y`: `Ref<'a, i32>`
-LL |     x.push(y); //~ ERROR explicit lifetime
-   |     ^^^^^^^^^ lifetime `'a` required
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex2b-push-no-existing-names.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex2b-push-no-existing-names.nll.stderr
deleted file mode 100644
index fc5f02fbc721d..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex2b-push-no-existing-names.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex2b-push-no-existing-names.rs:16:5
-   |
-LL | fn foo(x: &mut Vec<Ref<i32>>, y: Ref<i32>) {
-   |        -                      - has type `Ref<'1, i32>`
-   |        |
-   |        has type `&mut std::vec::Vec<Ref<'2, i32>>`
-LL |     x.push(y); //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex2c-push-inference-variable.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex2c-push-inference-variable.nll.stderr
deleted file mode 100644
index a5053244dc1f0..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex2c-push-inference-variable.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex2c-push-inference-variable.rs:17:5
-   |
-LL | fn foo<'a, 'b, 'c>(x: &'a mut Vec<Ref<'b, i32>>, y: Ref<'c, i32>) {
-   |            --  -- lifetime `'c` defined here
-   |            |
-   |            lifetime `'b` defined here
-LL |     let z = Ref { data: y.data };
-LL |     x.push(z); //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^ argument requires that `'c` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex2d-push-inference-variable-2.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex2d-push-inference-variable-2.nll.stderr
deleted file mode 100644
index 361fb708d4013..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex2d-push-inference-variable-2.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex2d-push-inference-variable-2.rs:18:5
-   |
-LL | fn foo<'a, 'b, 'c>(x: &'a mut Vec<Ref<'b, i32>>, y: Ref<'c, i32>) {
-   |            --  -- lifetime `'c` defined here
-   |            |
-   |            lifetime `'b` defined here
-...
-LL |     a.push(b);
-   |     ^^^^^^^^^ argument requires that `'c` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex2e-push-inference-variable-3.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex2e-push-inference-variable-3.nll.stderr
deleted file mode 100644
index 5d0f07054dfed..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex2e-push-inference-variable-3.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex2e-push-inference-variable-3.rs:18:5
-   |
-LL | fn foo<'a, 'b, 'c>(x: &'a mut Vec<Ref<'b, i32>>, y: Ref<'c, i32>) {
-   |            --  -- lifetime `'c` defined here
-   |            |
-   |            lifetime `'b` defined here
-...
-LL |     Vec::push(a, b);
-   |     ^^^^^^^^^^^^^^^ argument requires that `'c` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-2.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-2.nll.stderr
deleted file mode 100644
index e4aafd7b66e40..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-2.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-2.rs:12:5
-   |
-LL | fn foo(&mut (ref mut v, w): &mut (&u8, &u8), x: &u8) {
-   |                                   -             - let's call the lifetime of this reference `'1`
-   |                                   |
-   |                                   let's call the lifetime of this reference `'2`
-LL |     *v = x; //~ ERROR lifetime mismatch
-   |     ^^^^^^ assignment requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-3.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-3.nll.stderr
deleted file mode 100644
index e1872dcf777ec..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-3.nll.stderr
+++ /dev/null
@@ -1,22 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-3.rs:12:5
-   |
-LL | fn foo(z: &mut Vec<(&u8,&u8)>, (x, y): (&u8, &u8)) {
-   |                     -                   - let's call the lifetime of this reference `'1`
-   |                     |
-   |                     let's call the lifetime of this reference `'2`
-LL |     z.push((x,y)); //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-3.rs:12:5
-   |
-LL | fn foo(z: &mut Vec<(&u8,&u8)>, (x, y): (&u8, &u8)) {
-   |                         -                    - let's call the lifetime of this reference `'1`
-   |                         |
-   |                         let's call the lifetime of this reference `'2`
-LL |     z.push((x,y)); //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-2.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-2.nll.stderr
deleted file mode 100644
index 934cdcd2ef28c..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-2.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-both-are-structs-2.rs:16:5
-   |
-LL | fn foo(mut x: Ref, y: Ref) {
-   |        -----       - has type `Ref<'_, '1>`
-   |        |
-   |        has type `Ref<'_, '2>`
-LL |     x.b = y.b; //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^ assignment requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-3.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-3.nll.stderr
deleted file mode 100644
index cbfd9d478091e..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-3.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-both-are-structs-3.rs:16:5
-   |
-LL | fn foo(mut x: Ref) {
-   |        -----
-   |        |
-   |        has type `Ref<'_, '1>`
-   |        has type `Ref<'2, '_>`
-LL |     x.a = x.b; //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^ assignment requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-earlybound-regions.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-earlybound-regions.nll.stderr
deleted file mode 100644
index 7f814b730fff5..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-earlybound-regions.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-both-are-structs-earlybound-regions.rs:18:5
-   |
-LL | fn foo<'a, 'b>(mut x: Vec<Ref<'a>>, y: Ref<'b>)
-   |        --  -- lifetime `'b` defined here
-   |        |
-   |        lifetime `'a` defined here
-...
-LL |     x.push(y); //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^ argument requires that `'b` must outlive `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-latebound-regions.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-latebound-regions.nll.stderr
deleted file mode 100644
index f38dceb331bfb..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-latebound-regions.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-both-are-structs-latebound-regions.rs:15:5
-   |
-LL | fn foo<'a, 'b>(mut x: Vec<Ref<'a>>, y: Ref<'b>) {
-   |        --  -- lifetime `'b` defined here
-   |        |
-   |        lifetime `'a` defined here
-LL |     x.push(y); //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^ argument requires that `'b` must outlive `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs.nll.stderr
deleted file mode 100644
index 39a7154c8e955..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-both-are-structs.rs:15:5
-   |
-LL | fn foo(mut x: Vec<Ref>, y: Ref) {
-   |        -----            - has type `Ref<'1>`
-   |        |
-   |        has type `std::vec::Vec<Ref<'2>>`
-LL |     x.push(y); //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-latebound-regions.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-latebound-regions.nll.stderr
deleted file mode 100644
index d59480cefcc69..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-latebound-regions.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-latebound-regions.rs:12:5
-   |
-LL | fn foo<'a,'b>(x: &mut Vec<&'a u8>, y: &'b u8) {
-   |        -- -- lifetime `'b` defined here
-   |        |
-   |        lifetime `'a` defined here
-LL |     x.push(y); //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^ argument requires that `'b` must outlive `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct-2.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct-2.nll.stderr
deleted file mode 100644
index fc1fab7aab5bb..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct-2.nll.stderr
+++ /dev/null
@@ -1,21 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-one-is-struct-2.rs:14:5
-   |
-LL | fn foo(mut x: Ref, y: &u32) {
-   |        -----          - let's call the lifetime of this reference `'2`
-   |        |
-   |        has type `Ref<'_, '1>`
-LL |     y = x.b; //~ ERROR lifetime mismatch
-   |     ^^^^^^^ assignment requires that `'1` must outlive `'2`
-
-error[E0384]: cannot assign to immutable argument `y`
-  --> $DIR/ex3-both-anon-regions-one-is-struct-2.rs:14:5
-   |
-LL | fn foo(mut x: Ref, y: &u32) {
-   |                    - help: make this binding mutable: `mut y`
-LL |     y = x.b; //~ ERROR lifetime mismatch
-   |     ^^^^^^^ cannot assign to immutable argument
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0384`.
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct-3.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct-3.nll.stderr
deleted file mode 100644
index 8100fa89c2d0a..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct-3.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-one-is-struct-3.rs:14:5
-   |
-LL | fn foo(mut y: Ref, x: &u32) {
-   |        -----          - let's call the lifetime of this reference `'1`
-   |        |
-   |        has type `Ref<'_, '2>`
-LL |     y.b = x; //~ ERROR lifetime mismatch
-   |     ^^^^^^^ assignment requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct-4.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct-4.nll.stderr
deleted file mode 100644
index 1c4a8b6658932..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct-4.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-one-is-struct-4.rs:14:5
-   |
-LL | fn foo(mut y: Ref, x: &u32) {
-   |        -----          - let's call the lifetime of this reference `'1`
-   |        |
-   |        has type `Ref<'_, '2>`
-LL |     y.b = x; //~ ERROR lifetime mismatch
-   |     ^^^^^^^ assignment requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct.nll.stderr
deleted file mode 100644
index 2a4c5a685f16a..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-one-is-struct.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-one-is-struct.rs:17:5
-   |
-LL | fn foo(mut x: Ref, y: &u32) {
-   |        -----          - let's call the lifetime of this reference `'1`
-   |        |
-   |        has type `Ref<'_, '2>`
-LL |     x.b = y; //~ ERROR lifetime mismatch
-   |     ^^^^^^^ assignment requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-return-type-is-anon.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-return-type-is-anon.nll.stderr
deleted file mode 100644
index 898f997779d1d..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-return-type-is-anon.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-return-type-is-anon.rs:17:5
-   |
-LL |   fn foo<'a>(&self, x: &i32) -> &i32 {
-   |              -         - let's call the lifetime of this reference `'1`
-   |              |
-   |              let's call the lifetime of this reference `'2`
-LL |     x //~ ERROR lifetime mismatch
-   |     ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-self-is-anon.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-self-is-anon.nll.stderr
deleted file mode 100644
index bdb9b306cdaea..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-self-is-anon.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-self-is-anon.rs:17:19
-   |
-LL |     fn foo<'a>(&self, x: &Foo) -> &Foo {
-   |                -         - let's call the lifetime of this reference `'1`
-   |                |
-   |                let's call the lifetime of this reference `'2`
-LL |         if true { x } else { self } //~ ERROR lifetime mismatch
-   |                   ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-using-fn-items.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-using-fn-items.nll.stderr
deleted file mode 100644
index 2e4df170d6cd5..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-using-fn-items.nll.stderr
+++ /dev/null
@@ -1,21 +0,0 @@
-error[E0596]: cannot borrow `y` as mutable, as it is not declared as mutable
-  --> $DIR/ex3-both-anon-regions-using-fn-items.rs:11:3
-   |
-LL | fn foo(x:fn(&u8, &u8), y: Vec<&u8>, z: &u8) {
-   |                        - help: consider changing this to be mutable: `mut y`
-LL |   y.push(z); //~ ERROR lifetime mismatch
-   |   ^ cannot borrow as mutable
-
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-using-fn-items.rs:11:3
-   |
-LL | fn foo(x:fn(&u8, &u8), y: Vec<&u8>, z: &u8) {
-   |                               -        - let's call the lifetime of this reference `'1`
-   |                               |
-   |                               let's call the lifetime of this reference `'2`
-LL |   y.push(z); //~ ERROR lifetime mismatch
-   |   ^^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0596`.
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-using-impl-items.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-using-impl-items.nll.stderr
deleted file mode 100644
index 8d743608438ba..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-using-impl-items.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-using-impl-items.rs:15:9
-   |
-LL |     fn foo(x: &mut Vec<&u8>, y: &u8) {
-   |                        -        - let's call the lifetime of this reference `'1`
-   |                        |
-   |                        let's call the lifetime of this reference `'2`
-LL |         x.push(y); //~ ERROR lifetime mismatch
-   |         ^^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-using-trait-objects.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-using-trait-objects.nll.stderr
deleted file mode 100644
index a2dc0e4bda3b7..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-using-trait-objects.nll.stderr
+++ /dev/null
@@ -1,21 +0,0 @@
-error[E0596]: cannot borrow `y` as mutable, as it is not declared as mutable
-  --> $DIR/ex3-both-anon-regions-using-trait-objects.rs:11:3
-   |
-LL | fn foo(x:Box<Fn(&u8, &u8)> , y: Vec<&u8>, z: &u8) {
-   |                              - help: consider changing this to be mutable: `mut y`
-LL |   y.push(z); //~ ERROR lifetime mismatch
-   |   ^ cannot borrow as mutable
-
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions-using-trait-objects.rs:11:3
-   |
-LL | fn foo(x:Box<Fn(&u8, &u8)> , y: Vec<&u8>, z: &u8) {
-   |                                     -        - let's call the lifetime of this reference `'1`
-   |                                     |
-   |                                     let's call the lifetime of this reference `'2`
-LL |   y.push(z); //~ ERROR lifetime mismatch
-   |   ^^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0596`.
diff --git a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions.nll.stderr b/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions.nll.stderr
deleted file mode 100644
index 0d674162eea05..0000000000000
--- a/src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/ex3-both-anon-regions.rs:12:5
-   |
-LL | fn foo(x: &mut Vec<&u8>, y: &u8) {
-   |                    -        - let's call the lifetime of this reference `'1`
-   |                    |
-   |                    let's call the lifetime of this reference `'2`
-LL |     x.push(y); //~ ERROR lifetime mismatch
-   |     ^^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/lub-if.nll.stderr b/src/test/ui/lub-if.nll.stderr
deleted file mode 100644
index 2405e30a8cd00..0000000000000
--- a/src/test/ui/lub-if.nll.stderr
+++ /dev/null
@@ -1,20 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/lub-if.rs:38:9
-   |
-LL | pub fn opt_str2<'a>(maybestr: &'a Option<String>) -> &'static str {
-   |                 -- lifetime `'a` defined here
-...
-LL |         s  //~ ERROR E0312
-   |         ^ returning this value requires that `'a` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/lub-if.rs:45:9
-   |
-LL | pub fn opt_str3<'a>(maybestr: &'a Option<String>) -> &'static str {
-   |                 -- lifetime `'a` defined here
-...
-LL |         s  //~ ERROR E0312
-   |         ^ returning this value requires that `'a` must outlive `'static`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/lub-match.nll.stderr b/src/test/ui/lub-match.nll.stderr
deleted file mode 100644
index 5a39dd14e4c42..0000000000000
--- a/src/test/ui/lub-match.nll.stderr
+++ /dev/null
@@ -1,20 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/lub-match.rs:40:13
-   |
-LL | pub fn opt_str2<'a>(maybestr: &'a Option<String>) -> &'static str {
-   |                 -- lifetime `'a` defined here
-...
-LL |             s //~ ERROR E0312
-   |             ^ returning this value requires that `'a` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/lub-match.rs:49:13
-   |
-LL | pub fn opt_str3<'a>(maybestr: &'a Option<String>) -> &'static str {
-   |                 -- lifetime `'a` defined here
-...
-LL |             s //~ ERROR E0312
-   |             ^ returning this value requires that `'a` must outlive `'static`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/match/match-ref-mut-invariance.nll.stderr b/src/test/ui/match/match-ref-mut-invariance.nll.stderr
deleted file mode 100644
index d5167bbaeab07..0000000000000
--- a/src/test/ui/match/match-ref-mut-invariance.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/match-ref-mut-invariance.rs:20:9
-   |
-LL | impl<'b> S<'b> {
-   |      -- lifetime `'b` defined here
-LL |     fn bar<'a>(&'a mut self) -> &'a mut &'a i32 {
-   |            -- lifetime `'a` defined here
-LL |         match self.0 { ref mut x => x } //~ ERROR mismatched types
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ returning this value requires that `'a` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/match/match-ref-mut-let-invariance.nll.stderr b/src/test/ui/match/match-ref-mut-let-invariance.nll.stderr
deleted file mode 100644
index 54915865d8899..0000000000000
--- a/src/test/ui/match/match-ref-mut-let-invariance.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/match-ref-mut-let-invariance.rs:21:9
-   |
-LL | impl<'b> S<'b> {
-   |      -- lifetime `'b` defined here
-LL |     fn bar<'a>(&'a mut self) -> &'a mut &'a i32 {
-   |            -- lifetime `'a` defined here
-LL |         let ref mut x = self.0;
-LL |         x //~ ERROR mismatched types
-   |         ^ returning this value requires that `'a` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/moves/moves-based-on-type-block-bad.nll.stderr b/src/test/ui/moves/moves-based-on-type-block-bad.nll.stderr
index 1f22ab1481852..1ded703fd5a2f 100644
--- a/src/test/ui/moves/moves-based-on-type-block-bad.nll.stderr
+++ b/src/test/ui/moves/moves-based-on-type-block-bad.nll.stderr
@@ -16,6 +16,18 @@ note: move occurs because `x` has type `std::boxed::Box<isize>`, which does not
 LL |                 box E::Bar(x) => println!("{}", x.to_string()),
    |                            ^
 
-error: aborting due to previous error
+error[E0507]: cannot move out of `hellothere.x.0` which is behind a `&` reference
+  --> $DIR/moves-based-on-type-block-bad.rs:37:28
+   |
+LL |         f(&s, |hellothere| {
+   |                ---------- help: consider changing this to be a mutable reference: `&mut S`
+...
+LL |                 box E::Bar(x) => println!("{}", x.to_string()),
+   |                            ^
+   |                            |
+   |                            cannot move out of `hellothere.x.0` which is behind a `&` reference
+   |                            `hellothere` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/moves/moves-based-on-type-move-out-of-closure-env-issue-1965.nll.stderr b/src/test/ui/moves/moves-based-on-type-move-out-of-closure-env-issue-1965.nll.stderr
index 13a6fc15ce318..a34a9efab6bce 100644
--- a/src/test/ui/moves/moves-based-on-type-move-out-of-closure-env-issue-1965.nll.stderr
+++ b/src/test/ui/moves/moves-based-on-type-move-out-of-closure-env-issue-1965.nll.stderr
@@ -6,6 +6,21 @@ LL |     let i = box 3;
 LL |     let _f = to_fn(|| test(i)); //~ ERROR cannot move out
    |                            ^ cannot move out of captured variable in an `Fn` closure
 
-error: aborting due to previous error
+error[E0507]: cannot move out of `i`, as it is a captured variable in a `Fn` closure
+  --> $DIR/moves-based-on-type-move-out-of-closure-env-issue-1965.rs:21:28
+   |
+LL |     let _f = to_fn(|| test(i)); //~ ERROR cannot move out
+   |                            ^
+   |                            |
+   |                            cannot move out of `i`, as it is a captured variable in a `Fn` closure
+   |                            cannot move
+   |
+help: consider changing this to accept closures that implement `FnMut`
+  --> $DIR/moves-based-on-type-move-out-of-closure-env-issue-1965.rs:21:20
+   |
+LL |     let _f = to_fn(|| test(i)); //~ ERROR cannot move out
+   |                    ^^^^^^^^^^
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/nll/cannot-move-block-spans.nll.stderr b/src/test/ui/nll/cannot-move-block-spans.nll.stderr
index 6a4c8f2e8d815..2d54ae0b81ec8 100644
--- a/src/test/ui/nll/cannot-move-block-spans.nll.stderr
+++ b/src/test/ui/nll/cannot-move-block-spans.nll.stderr
@@ -7,6 +7,17 @@ LL |     let x = { *r }; //~ ERROR
    |               cannot move out of borrowed content
    |               help: consider removing the `*`: `r`
 
+error[E0507]: cannot move out of `*r` which is behind a `&` reference
+  --> $DIR/cannot-move-block-spans.rs:15:15
+   |
+LL | pub fn deref(r: &String) {
+   |                 ------- help: consider changing this to be a mutable reference: `&mut std::string::String`
+LL |     let x = { *r }; //~ ERROR
+   |               ^^
+   |               |
+   |               cannot move out of `*r` which is behind a `&` reference
+   |               `r` is a `&` reference, so the data it refers to cannot be moved
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/cannot-move-block-spans.rs:16:22
    |
@@ -16,6 +27,18 @@ LL |     let y = unsafe { *r }; //~ ERROR
    |                      cannot move out of borrowed content
    |                      help: consider removing the `*`: `r`
 
+error[E0507]: cannot move out of `*r` which is behind a `&` reference
+  --> $DIR/cannot-move-block-spans.rs:16:22
+   |
+LL | pub fn deref(r: &String) {
+   |                 ------- help: consider changing this to be a mutable reference: `&mut std::string::String`
+LL |     let x = { *r }; //~ ERROR
+LL |     let y = unsafe { *r }; //~ ERROR
+   |                      ^^
+   |                      |
+   |                      cannot move out of `*r` which is behind a `&` reference
+   |                      `r` is a `&` reference, so the data it refers to cannot be moved
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/cannot-move-block-spans.rs:17:26
    |
@@ -25,6 +48,18 @@ LL |     let z = loop { break *r; }; //~ ERROR
    |                          cannot move out of borrowed content
    |                          help: consider removing the `*`: `r`
 
+error[E0507]: cannot move out of `*r` which is behind a `&` reference
+  --> $DIR/cannot-move-block-spans.rs:17:26
+   |
+LL | pub fn deref(r: &String) {
+   |                 ------- help: consider changing this to be a mutable reference: `&mut std::string::String`
+...
+LL |     let z = loop { break *r; }; //~ ERROR
+   |                          ^^
+   |                          |
+   |                          cannot move out of `*r` which is behind a `&` reference
+   |                          `r` is a `&` reference, so the data it refers to cannot be moved
+
 error[E0508]: cannot move out of type `[std::string::String; 2]`, a non-copy array
   --> $DIR/cannot-move-block-spans.rs:21:15
    |
@@ -61,6 +96,17 @@ LL |     let x = { let mut u = 0; u += 1; *r }; //~ ERROR
    |                                      cannot move out of borrowed content
    |                                      help: consider removing the `*`: `r`
 
+error[E0507]: cannot move out of `*r` which is behind a `&` reference
+  --> $DIR/cannot-move-block-spans.rs:27:38
+   |
+LL | pub fn additional_statement_cases(r: &String) {
+   |                                      ------- help: consider changing this to be a mutable reference: `&mut std::string::String`
+LL |     let x = { let mut u = 0; u += 1; *r }; //~ ERROR
+   |                                      ^^
+   |                                      |
+   |                                      cannot move out of `*r` which is behind a `&` reference
+   |                                      `r` is a `&` reference, so the data it refers to cannot be moved
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/cannot-move-block-spans.rs:28:45
    |
@@ -70,6 +116,18 @@ LL |     let y = unsafe { let mut u = 0; u += 1; *r }; //~ ERROR
    |                                             cannot move out of borrowed content
    |                                             help: consider removing the `*`: `r`
 
+error[E0507]: cannot move out of `*r` which is behind a `&` reference
+  --> $DIR/cannot-move-block-spans.rs:28:45
+   |
+LL | pub fn additional_statement_cases(r: &String) {
+   |                                      ------- help: consider changing this to be a mutable reference: `&mut std::string::String`
+LL |     let x = { let mut u = 0; u += 1; *r }; //~ ERROR
+LL |     let y = unsafe { let mut u = 0; u += 1; *r }; //~ ERROR
+   |                                             ^^
+   |                                             |
+   |                                             cannot move out of `*r` which is behind a `&` reference
+   |                                             `r` is a `&` reference, so the data it refers to cannot be moved
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/cannot-move-block-spans.rs:29:49
    |
@@ -79,7 +137,19 @@ LL |     let z = loop { let mut u = 0; u += 1; break *r; u += 2; }; //~ ERROR
    |                                                 cannot move out of borrowed content
    |                                                 help: consider removing the `*`: `r`
 
-error: aborting due to 9 previous errors
+error[E0507]: cannot move out of `*r` which is behind a `&` reference
+  --> $DIR/cannot-move-block-spans.rs:29:49
+   |
+LL | pub fn additional_statement_cases(r: &String) {
+   |                                      ------- help: consider changing this to be a mutable reference: `&mut std::string::String`
+...
+LL |     let z = loop { let mut u = 0; u += 1; break *r; u += 2; }; //~ ERROR
+   |                                                 ^^
+   |                                                 |
+   |                                                 cannot move out of `*r` which is behind a `&` reference
+   |                                                 `r` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 15 previous errors
 
 Some errors occurred: E0507, E0508.
 For more information about an error, try `rustc --explain E0507`.
diff --git a/src/test/ui/nll/match-guards-always-borrow.ast.nll.stderr b/src/test/ui/nll/match-guards-always-borrow.ast.nll.stderr
index 54b1fcbd5bbf6..4fe01d472f50e 100644
--- a/src/test/ui/nll/match-guards-always-borrow.ast.nll.stderr
+++ b/src/test/ui/nll/match-guards-always-borrow.ast.nll.stderr
@@ -1,8 +1,36 @@
-error[E0507]: cannot move out of borrowed content
+warning[E0507]: cannot move out of borrowed content
   --> $DIR/match-guards-always-borrow.rs:23:13
    |
 LL |             (|| { let bar = foo; bar.take() })();
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot move out of borrowed content
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
+
+warning[E0507]: cannot move out of `foo`, as it is immutable for the pattern guard
+  --> $DIR/match-guards-always-borrow.rs:23:13
+   |
+LL |             (|| { let bar = foo; bar.take() })();
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |             |
+   |             cannot move out of `foo`, as it is immutable for the pattern guard
+   |             cannot move
+   |
+   = note: variables bound in patterns are immutable until the end of the pattern guard
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
+
+error: compilation successful
+  --> $DIR/match-guards-always-borrow.rs:57:1
+   |
+LL | / fn main() { //[ast]~ ERROR compilation successful
+LL | |     should_reject_destructive_mutate_in_guard();
+LL | |     allow_mutate_in_arm_body();
+LL | |     allow_move_into_arm_body();
+LL | | }
+   | |_^
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/nll/ty-outlives/projection-where-clause-env-wrong-lifetime.nll.stderr b/src/test/ui/nll/ty-outlives/projection-where-clause-env-wrong-lifetime.nll.stderr
deleted file mode 100644
index 1e953ecff6923..0000000000000
--- a/src/test/ui/nll/ty-outlives/projection-where-clause-env-wrong-lifetime.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error[E0309]: the associated type `<T as MyTrait<'_>>::Output` may not live long enough
-  --> $DIR/projection-where-clause-env-wrong-lifetime.rs:14:5
-   |
-LL |     bar::<<T as MyTrait<'a>>::Output>()
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `<T as MyTrait<'_>>::Output: 'a`...
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0309`.
diff --git a/src/test/ui/object-lifetime/object-lifetime-default-elision.nll.stderr b/src/test/ui/object-lifetime/object-lifetime-default-elision.nll.stderr
deleted file mode 100644
index e132ec67b9632..0000000000000
--- a/src/test/ui/object-lifetime/object-lifetime-default-elision.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/object-lifetime-default-elision.rs:81:5
-   |
-LL | fn load3<'a,'b>(ss: &'a SomeTrait) -> &'b SomeTrait {
-   |          -- -- lifetime `'b` defined here
-   |          |
-   |          lifetime `'a` defined here
-...
-LL |     ss
-   |     ^^ returning this value requires that `'a` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/object-lifetime/object-lifetime-default-from-box-error.nll.stderr b/src/test/ui/object-lifetime/object-lifetime-default-from-box-error.nll.stderr
deleted file mode 100644
index e0c291928283c..0000000000000
--- a/src/test/ui/object-lifetime/object-lifetime-default-from-box-error.nll.stderr
+++ /dev/null
@@ -1,28 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `ss`
-  --> $DIR/object-lifetime-default-from-box-error.rs:28:5
-   |
-LL | fn load(ss: &mut SomeStruct) -> Box<SomeTrait> {
-   |             --------------- help: add explicit lifetime `'static` to the type of `ss`: `&mut SomeStruct<'static>`
-...
-LL |     ss.r //~ ERROR explicit lifetime required in the type of `ss` [E0621]
-   |     ^^^^ lifetime `'static` required
-
-error[E0507]: cannot move out of borrowed content
-  --> $DIR/object-lifetime-default-from-box-error.rs:28:5
-   |
-LL |     ss.r //~ ERROR explicit lifetime required in the type of `ss` [E0621]
-   |     ^^^^ cannot move out of borrowed content
-
-error[E0621]: explicit lifetime required in the type of `ss`
-  --> $DIR/object-lifetime-default-from-box-error.rs:41:5
-   |
-LL | fn store1<'b>(ss: &mut SomeStruct, b: Box<SomeTrait+'b>) {
-   |                   --------------- help: add explicit lifetime `'b` to the type of `ss`: `&mut SomeStruct<'b>`
-...
-LL |     ss.r = b; //~ ERROR 41:12: 41:13: explicit lifetime required in the type of `ss` [E0621]
-   |     ^^^^ lifetime `'b` required
-
-error: aborting due to 3 previous errors
-
-Some errors occurred: E0507, E0621.
-For more information about an error, try `rustc --explain E0507`.
diff --git a/src/test/ui/object-lifetime/object-lifetime-default-from-rptr-box-error.nll.stderr b/src/test/ui/object-lifetime/object-lifetime-default-from-rptr-box-error.nll.stderr
deleted file mode 100644
index a6bfcf1d3699a..0000000000000
--- a/src/test/ui/object-lifetime/object-lifetime-default-from-rptr-box-error.nll.stderr
+++ /dev/null
@@ -1,10 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/object-lifetime-default-from-rptr-box-error.rs:25:5
-   |
-LL | fn c<'a>(t: &'a Box<Test+'a>, mut ss: SomeStruct<'a>) {
-   |      -- lifetime `'a` defined here
-LL |     ss.t = t; //~ ERROR mismatched types
-   |     ^^^^^^^^ assignment requires that `'a` must outlive `'static`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/object-lifetime/object-lifetime-default-from-rptr-struct-error.nll.stderr b/src/test/ui/object-lifetime/object-lifetime-default-from-rptr-struct-error.nll.stderr
deleted file mode 100644
index 396ff1302b151..0000000000000
--- a/src/test/ui/object-lifetime/object-lifetime-default-from-rptr-struct-error.nll.stderr
+++ /dev/null
@@ -1,10 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/object-lifetime-default-from-rptr-struct-error.rs:31:5
-   |
-LL | fn c<'a>(t: &'a MyBox<Test+'a>, mut ss: SomeStruct<'a>) {
-   |      -- lifetime `'a` defined here
-LL |     ss.t = t; //~ ERROR mismatched types
-   |     ^^^^^^^^ assignment requires that `'a` must outlive `'static`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/object-lifetime/object-lifetime-default-mybox.nll.stderr b/src/test/ui/object-lifetime/object-lifetime-default-mybox.nll.stderr
deleted file mode 100644
index 41988b31e9745..0000000000000
--- a/src/test/ui/object-lifetime/object-lifetime-default-mybox.nll.stderr
+++ /dev/null
@@ -1,21 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/object-lifetime-default-mybox.rs:37:5
-   |
-LL | fn load1<'a,'b>(a: &'a MyBox<SomeTrait>,
-   |          -- -- lifetime `'b` defined here
-   |          |
-   |          lifetime `'a` defined here
-...
-LL |     a //~ ERROR lifetime mismatch
-   |     ^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
-
-error: borrowed data escapes outside of function
-  --> $DIR/object-lifetime-default-mybox.rs:41:5
-   |
-LL | fn load2<'a>(ss: &MyBox<SomeTrait+'a>) -> MyBox<SomeTrait+'a> {
-   |              -- `ss` is a reference that is only valid in the function body
-LL |     load0(ss) //~ ERROR mismatched types
-   |     ^^^^^^^^^ `ss` escapes the function body here
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/regions/region-invariant-static-error-reporting.nll.stderr b/src/test/ui/regions/region-invariant-static-error-reporting.nll.stderr
deleted file mode 100644
index c9714de1f0975..0000000000000
--- a/src/test/ui/regions/region-invariant-static-error-reporting.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: borrowed data escapes outside of function
-  --> $DIR/region-invariant-static-error-reporting.rs:25:9
-   |
-LL | fn unify<'a>(x: Option<Invariant<'a>>, f: fn(Invariant<'a>)) {
-   |              - `x` is a reference that is only valid in the function body
-LL |     let bad = if x.is_some() {
-LL |         x.unwrap()
-   |         ^^^^^^^^^^ `x` escapes the function body here
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/region-lifetime-bounds-on-fns-where-clause.nll.stderr b/src/test/ui/regions/region-lifetime-bounds-on-fns-where-clause.nll.stderr
deleted file mode 100644
index 01bc022acb1cb..0000000000000
--- a/src/test/ui/regions/region-lifetime-bounds-on-fns-where-clause.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error[E0308]: mismatched types
-  --> $DIR/region-lifetime-bounds-on-fns-where-clause.rs:30:43
-   |
-LL |     let _: fn(&mut &isize, &mut &isize) = a; //~ ERROR mismatched types
-   |                                           ^ expected concrete lifetime, found bound lifetime parameter
-   |
-   = note: expected type `for<'r, 's, 't0, 't1> fn(&'r mut &'s isize, &'t0 mut &'t1 isize)`
-              found type `for<'r, 's> fn(&'r mut &isize, &'s mut &isize) {a::<'_, '_>}`
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0308`.
diff --git a/src/test/ui/regions/region-multiple-lifetime-bounds-on-fns-where-clause.nll.stderr b/src/test/ui/regions/region-multiple-lifetime-bounds-on-fns-where-clause.nll.stderr
deleted file mode 100644
index 44f8f9e46f3fe..0000000000000
--- a/src/test/ui/regions/region-multiple-lifetime-bounds-on-fns-where-clause.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error[E0308]: mismatched types
-  --> $DIR/region-multiple-lifetime-bounds-on-fns-where-clause.rs:32:56
-   |
-LL |     let _: fn(&mut &isize, &mut &isize, &mut &isize) = a; //~ ERROR mismatched types
-   |                                                        ^ expected concrete lifetime, found bound lifetime parameter
-   |
-   = note: expected type `for<'r, 's, 't0, 't1, 't2, 't3> fn(&'r mut &'s isize, &'t0 mut &'t1 isize, &'t2 mut &'t3 isize)`
-              found type `for<'r, 's, 't0> fn(&'r mut &isize, &'s mut &isize, &'t0 mut &isize) {a::<'_, '_, '_>}`
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0308`.
diff --git a/src/test/ui/regions/region-object-lifetime-2.nll.stderr b/src/test/ui/regions/region-object-lifetime-2.nll.stderr
deleted file mode 100644
index 4e1b8b7e1a076..0000000000000
--- a/src/test/ui/regions/region-object-lifetime-2.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/region-object-lifetime-2.rs:20:5
-   |
-LL | fn borrowed_receiver_different_lifetimes<'a,'b>(x: &'a Foo) -> &'b () {
-   |                                          -- -- lifetime `'b` defined here
-   |                                          |
-   |                                          lifetime `'a` defined here
-LL |     x.borrowed() //~ ERROR cannot infer
-   |     ^^^^^^^^^^^^ returning this value requires that `'a` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/region-object-lifetime-4.nll.stderr b/src/test/ui/regions/region-object-lifetime-4.nll.stderr
deleted file mode 100644
index 5f1f70dfe1935..0000000000000
--- a/src/test/ui/regions/region-object-lifetime-4.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/region-object-lifetime-4.rs:22:5
-   |
-LL | fn borrowed_receiver_related_lifetimes2<'a,'b>(x: &'a (Foo+'b)) -> &'b () {
-   |                                         -- -- lifetime `'b` defined here
-   |                                         |
-   |                                         lifetime `'a` defined here
-LL |     x.borrowed() //~ ERROR cannot infer
-   |     ^^^^^^^^^^^^ argument requires that `'a` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/region-object-lifetime-in-coercion.nll.stderr b/src/test/ui/regions/region-object-lifetime-in-coercion.nll.stderr
deleted file mode 100644
index 8fd195639fec3..0000000000000
--- a/src/test/ui/regions/region-object-lifetime-in-coercion.nll.stderr
+++ /dev/null
@@ -1,38 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `v`
-  --> $DIR/region-object-lifetime-in-coercion.rs:18:12
-   |
-LL | fn a(v: &[u8]) -> Box<Foo + 'static> {
-   |         ----- help: add explicit lifetime `'static` to the type of `v`: `&'static [u8]`
-LL |     let x: Box<Foo + 'static> = Box::new(v);
-   |            ^^^^^^^^^^^^^^^^^^ lifetime `'static` required
-
-error[E0621]: explicit lifetime required in the type of `v`
-  --> $DIR/region-object-lifetime-in-coercion.rs:24:5
-   |
-LL | fn b(v: &[u8]) -> Box<Foo + 'static> {
-   |         ----- help: add explicit lifetime `'static` to the type of `v`: `&'static [u8]`
-LL |     Box::new(v)
-   |     ^^^^^^^^^^^ lifetime `'static` required
-
-error[E0621]: explicit lifetime required in the type of `v`
-  --> $DIR/region-object-lifetime-in-coercion.rs:31:5
-   |
-LL | fn c(v: &[u8]) -> Box<Foo> {
-   |         ----- help: add explicit lifetime `'static` to the type of `v`: `&'static [u8]`
-...
-LL |     Box::new(v)
-   |     ^^^^^^^^^^^ lifetime `'static` required
-
-error: unsatisfied lifetime constraints
-  --> $DIR/region-object-lifetime-in-coercion.rs:36:5
-   |
-LL | fn d<'a,'b>(v: &'a [u8]) -> Box<Foo+'b> {
-   |      -- -- lifetime `'b` defined here
-   |      |
-   |      lifetime `'a` defined here
-LL |     Box::new(v)
-   |     ^^^^^^^^^^^ returning this value requires that `'a` must outlive `'b`
-
-error: aborting due to 4 previous errors
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/regions/regions-addr-of-self.nll.stderr b/src/test/ui/regions/regions-addr-of-self.nll.stderr
deleted file mode 100644
index 1454c856f9785..0000000000000
--- a/src/test/ui/regions/regions-addr-of-self.nll.stderr
+++ /dev/null
@@ -1,10 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-addr-of-self.rs:17:16
-   |
-LL |     pub fn chase_cat(&mut self) {
-   |                      - let's call the lifetime of this reference `'1`
-LL |         let p: &'static mut usize = &mut self.cats_chased; //~ ERROR cannot infer
-   |                ^^^^^^^^^^^^^^^^^^ type annotation requires that `'1` must outlive `'static`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-addr-of-upvar-self.nll.stderr b/src/test/ui/regions/regions-addr-of-upvar-self.nll.stderr
deleted file mode 100644
index 0e48192eaffc8..0000000000000
--- a/src/test/ui/regions/regions-addr-of-upvar-self.nll.stderr
+++ /dev/null
@@ -1,47 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-addr-of-upvar-self.rs:20:20
-   |
-LL |         let _f = || {
-   |                  -- lifetime `'1` represents this closure's body
-LL |             let p: &'static mut usize = &mut self.food; //~ ERROR cannot infer
-   |                    ^^^^^^^^^^^^^^^^^^ type annotation requires that `'1` must outlive `'static`
-   |
-   = note: closure implements `FnMut`, so references to captured variables can't escape the closure
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-addr-of-upvar-self.rs:20:20
-   |
-LL |     pub fn chase_cat(&mut self) {
-   |                      --------- lifetime `'2` appears in the type of `self`
-LL |         let _f = || {
-   |                  -- lifetime `'1` represents this closure's body
-LL |             let p: &'static mut usize = &mut self.food; //~ ERROR cannot infer
-   |                    ^^^^^^^^^^^^^^^^^^ type annotation requires that `'1` must outlive `'2`
-   |
-   = note: closure implements `FnMut`, so references to captured variables can't escape the closure
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-addr-of-upvar-self.rs:20:20
-   |
-LL |     pub fn chase_cat(&mut self) {
-   |                      - let's call the lifetime of this reference `'1`
-LL |         let _f = || {
-LL |             let p: &'static mut usize = &mut self.food; //~ ERROR cannot infer
-   |                    ^^^^^^^^^^^^^^^^^^ type annotation requires that `'1` must outlive `'static`
-
-error[E0597]: `self` does not live long enough
-  --> $DIR/regions-addr-of-upvar-self.rs:20:46
-   |
-LL |         let _f = || {
-   |                  -- value captured here
-LL |             let p: &'static mut usize = &mut self.food; //~ ERROR cannot infer
-   |                                              ^^^^ borrowed value does not live long enough
-...
-LL |     }
-   |      - `self` dropped here while still borrowed
-   |
-   = note: borrowed value must be valid for the static lifetime...
-
-error: aborting due to 4 previous errors
-
-For more information about this error, try `rustc --explain E0597`.
diff --git a/src/test/ui/regions/regions-assoc-type-in-supertrait-outlives-container.nll.stderr b/src/test/ui/regions/regions-assoc-type-in-supertrait-outlives-container.nll.stderr
deleted file mode 100644
index f711541fbd5c2..0000000000000
--- a/src/test/ui/regions/regions-assoc-type-in-supertrait-outlives-container.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-assoc-type-in-supertrait-outlives-container.rs:52:13
-   |
-LL | fn with_assoc<'a,'b>() {
-   |               -- -- lifetime `'b` defined here
-   |               |
-   |               lifetime `'a` defined here
-...
-LL |     let _x: &'a WithAssoc<TheType<'b>> = loop { };
-   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'b` must outlive `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-bounded-by-trait-requiring-static.nll.stderr b/src/test/ui/regions/regions-bounded-by-trait-requiring-static.nll.stderr
deleted file mode 100644
index 654b2b91583a8..0000000000000
--- a/src/test/ui/regions/regions-bounded-by-trait-requiring-static.nll.stderr
+++ /dev/null
@@ -1,50 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-bounded-by-trait-requiring-static.rs:32:5
-   |
-LL | fn param_not_ok<'a>(x: &'a isize) {
-   |                 -- lifetime `'a` defined here
-LL |     assert_send::<&'a isize>(); //~ ERROR does not fulfill the required lifetime
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'a` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-bounded-by-trait-requiring-static.rs:36:5
-   |
-LL | fn param_not_ok1<'a>(_: &'a isize) {
-   |                  -- lifetime `'a` defined here
-LL |     assert_send::<&'a str>(); //~ ERROR does not fulfill the required lifetime
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'a` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-bounded-by-trait-requiring-static.rs:40:5
-   |
-LL | fn param_not_ok2<'a>(_: &'a isize) {
-   |                  -- lifetime `'a` defined here
-LL |     assert_send::<&'a [isize]>(); //~ ERROR does not fulfill the required lifetime
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'a` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-bounded-by-trait-requiring-static.rs:54:5
-   |
-LL | fn box_with_region_not_ok<'a>() {
-   |                           -- lifetime `'a` defined here
-LL |     assert_send::<Box<&'a isize>>(); //~ ERROR does not fulfill the required lifetime
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'a` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-bounded-by-trait-requiring-static.rs:65:5
-   |
-LL | fn unsafe_ok2<'a>(_: &'a isize) {
-   |               -- lifetime `'a` defined here
-LL |     assert_send::<*const &'a isize>(); //~ ERROR does not fulfill the required lifetime
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'a` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-bounded-by-trait-requiring-static.rs:69:5
-   |
-LL | fn unsafe_ok3<'a>(_: &'a isize) {
-   |               -- lifetime `'a` defined here
-LL |     assert_send::<*mut &'a isize>(); //~ ERROR does not fulfill the required lifetime
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'a` must outlive `'static`
-
-error: aborting due to 6 previous errors
-
diff --git a/src/test/ui/regions/regions-bounded-method-type-parameters-cross-crate.nll.stderr b/src/test/ui/regions/regions-bounded-method-type-parameters-cross-crate.nll.stderr
deleted file mode 100644
index a292bacc674bf..0000000000000
--- a/src/test/ui/regions/regions-bounded-method-type-parameters-cross-crate.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-bounded-method-type-parameters-cross-crate.rs:30:5
-   |
-LL | fn call_bigger_region<'x, 'y>(a: Inv<'x>, b: Inv<'y>) {
-   |                       --  -- lifetime `'y` defined here
-   |                       |
-   |                       lifetime `'x` defined here
-LL |     // Here the value provided for 'y is 'y, and hence 'y:'x does not hold.
-LL |     a.bigger_region(b) //~ ERROR 30:7: 30:20: lifetime mismatch [E0623]
-   |     ^^^^^^^^^^^^^^^^^^ argument requires that `'y` must outlive `'x`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-bounded-method-type-parameters-trait-bound.nll.stderr b/src/test/ui/regions/regions-bounded-method-type-parameters-trait-bound.nll.stderr
deleted file mode 100644
index 99c31783acdcc..0000000000000
--- a/src/test/ui/regions/regions-bounded-method-type-parameters-trait-bound.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: borrowed data escapes outside of function
-  --> $DIR/regions-bounded-method-type-parameters-trait-bound.rs:30:5
-   |
-LL | fn caller2<'a,'b,F:Foo<'a>>(a: Inv<'a>, b: Inv<'b>, f: F) {
-   |                             -           - `b` is a reference that is only valid in the function body
-   |                             |
-   |                             `a` is declared here, outside of the function body
-LL |     // Here the value provided for 'y is 'b, and hence 'b:'a does not hold.
-LL |     f.method(b); //~ ERROR 30:7: 30:13: lifetime mismatch [E0623]
-   |     ^^^^^^^^^^^ `b` escapes the function body here
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-bounded-method-type-parameters.nll.stderr b/src/test/ui/regions/regions-bounded-method-type-parameters.nll.stderr
deleted file mode 100644
index 91e0f7f73ee3d..0000000000000
--- a/src/test/ui/regions/regions-bounded-method-type-parameters.nll.stderr
+++ /dev/null
@@ -1,19 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `x`
-  --> $DIR/regions-bounded-method-type-parameters.rs:22:5
-   |
-LL | fn caller<'a>(x: &isize) {
-   |                  ------ help: add explicit lifetime `'a` to the type of `x`: `&'a isize`
-LL |     Foo.some_method::<&'a isize>();
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ lifetime `'a` required
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-bounded-method-type-parameters.rs:22:5
-   |
-LL | fn caller<'a>(x: &isize) {
-   |           -- lifetime `'a` defined here
-LL |     Foo.some_method::<&'a isize>();
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'a` must outlive `'static`
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/regions/regions-bounds.nll.stderr b/src/test/ui/regions/regions-bounds.nll.stderr
deleted file mode 100644
index e50e806da12a3..0000000000000
--- a/src/test/ui/regions/regions-bounds.nll.stderr
+++ /dev/null
@@ -1,22 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-bounds.rs:19:12
-   |
-LL | fn a_fn1<'a,'b>(e: an_enum<'a>) -> an_enum<'b> {
-   |          -- -- lifetime `'b` defined here
-   |          |
-   |          lifetime `'a` defined here
-LL |     return e; //~ ERROR mismatched types
-   |            ^ returning this value requires that `'a` must outlive `'b`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-bounds.rs:23:12
-   |
-LL | fn a_fn3<'a,'b>(e: a_class<'a>) -> a_class<'b> {
-   |          -- -- lifetime `'b` defined here
-   |          |
-   |          lifetime `'a` defined here
-LL |     return e; //~ ERROR mismatched types
-   |            ^ returning this value requires that `'a` must outlive `'b`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/regions/regions-close-associated-type-into-object.nll.stderr b/src/test/ui/regions/regions-close-associated-type-into-object.nll.stderr
deleted file mode 100644
index 90d38a49c4a82..0000000000000
--- a/src/test/ui/regions/regions-close-associated-type-into-object.nll.stderr
+++ /dev/null
@@ -1,36 +0,0 @@
-error[E0310]: the associated type `<T as Iter>::Item` may not live long enough
-  --> $DIR/regions-close-associated-type-into-object.rs:25:5
-   |
-LL |     Box::new(item) //~ ERROR associated type `<T as Iter>::Item` may not live long enough
-   |     ^^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `<T as Iter>::Item: 'static`...
-
-error[E0310]: the associated type `<T as Iter>::Item` may not live long enough
-  --> $DIR/regions-close-associated-type-into-object.rs:32:5
-   |
-LL |     Box::new(item) //~ ERROR associated type `<T as Iter>::Item` may not live long enough
-   |     ^^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `<T as Iter>::Item: 'static`...
-
-error[E0309]: the associated type `<T as Iter>::Item` may not live long enough
-  --> $DIR/regions-close-associated-type-into-object.rs:38:5
-   |
-LL |     Box::new(item) //~ ERROR associated type `<T as Iter>::Item` may not live long enough
-   |     ^^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `<T as Iter>::Item: 'a`...
-
-error[E0309]: the associated type `<T as Iter>::Item` may not live long enough
-  --> $DIR/regions-close-associated-type-into-object.rs:45:5
-   |
-LL |     Box::new(item) //~ ERROR associated type `<T as Iter>::Item` may not live long enough
-   |     ^^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `<T as Iter>::Item: 'a`...
-
-error: aborting due to 4 previous errors
-
-Some errors occurred: E0309, E0310.
-For more information about an error, try `rustc --explain E0309`.
diff --git a/src/test/ui/regions/regions-close-object-into-object-2.nll.stderr b/src/test/ui/regions/regions-close-object-into-object-2.nll.stderr
deleted file mode 100644
index c073e3728e705..0000000000000
--- a/src/test/ui/regions/regions-close-object-into-object-2.nll.stderr
+++ /dev/null
@@ -1,21 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-close-object-into-object-2.rs:20:5
-   |
-LL | fn g<'a, T: 'static>(v: Box<A<T>+'a>) -> Box<X+'static> {
-   |      -- lifetime `'a` defined here
-LL |     box B(&*v) as Box<X> //~ ERROR cannot infer
-   |     ^^^^^^^^^^^^^^^^^^^^ returning this value requires that `'a` must outlive `'static`
-
-error[E0597]: `*v` does not live long enough
-  --> $DIR/regions-close-object-into-object-2.rs:20:11
-   |
-LL |     box B(&*v) as Box<X> //~ ERROR cannot infer
-   |           ^^^ borrowed value does not live long enough
-LL | }
-   | - `*v` dropped here while still borrowed
-   |
-   = note: borrowed value must be valid for the static lifetime...
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0597`.
diff --git a/src/test/ui/regions/regions-close-object-into-object-4.nll.stderr b/src/test/ui/regions/regions-close-object-into-object-4.nll.stderr
deleted file mode 100644
index 4b47b951d7717..0000000000000
--- a/src/test/ui/regions/regions-close-object-into-object-4.nll.stderr
+++ /dev/null
@@ -1,38 +0,0 @@
-error[E0310]: the parameter type `U` may not live long enough
-  --> $DIR/regions-close-object-into-object-4.rs:20:5
-   |
-LL |     box B(&*v) as Box<X> //~ ERROR cannot infer
-   |     ^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `U: 'static`...
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-close-object-into-object-4.rs:20:5
-   |
-LL | fn i<'a, T, U>(v: Box<A<U>+'a>) -> Box<X+'static> {
-   |      -- lifetime `'a` defined here
-LL |     box B(&*v) as Box<X> //~ ERROR cannot infer
-   |     ^^^^^^^^^^^^^^^^^^^^ returning this value requires that `'a` must outlive `'static`
-
-error[E0310]: the parameter type `U` may not live long enough
-  --> $DIR/regions-close-object-into-object-4.rs:20:9
-   |
-LL |     box B(&*v) as Box<X> //~ ERROR cannot infer
-   |         ^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `U: 'static`...
-
-error[E0597]: `*v` does not live long enough
-  --> $DIR/regions-close-object-into-object-4.rs:20:11
-   |
-LL |     box B(&*v) as Box<X> //~ ERROR cannot infer
-   |           ^^^ borrowed value does not live long enough
-LL | }
-   | - `*v` dropped here while still borrowed
-   |
-   = note: borrowed value must be valid for the static lifetime...
-
-error: aborting due to 4 previous errors
-
-Some errors occurred: E0310, E0597.
-For more information about an error, try `rustc --explain E0310`.
diff --git a/src/test/ui/regions/regions-close-object-into-object-5.nll.stderr b/src/test/ui/regions/regions-close-object-into-object-5.nll.stderr
deleted file mode 100644
index 8ef80fd775bfa..0000000000000
--- a/src/test/ui/regions/regions-close-object-into-object-5.nll.stderr
+++ /dev/null
@@ -1,31 +0,0 @@
-error[E0310]: the parameter type `T` may not live long enough
-  --> $DIR/regions-close-object-into-object-5.rs:27:5
-   |
-LL |     box B(&*v) as Box<X>
-   |     ^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `T: 'static`...
-
-error[E0310]: the parameter type `T` may not live long enough
-  --> $DIR/regions-close-object-into-object-5.rs:27:9
-   |
-LL |     box B(&*v) as Box<X>
-   |         ^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `T: 'static`...
-
-error[E0597]: `*v` does not live long enough
-  --> $DIR/regions-close-object-into-object-5.rs:27:11
-   |
-LL |     box B(&*v) as Box<X>
-   |           ^^^ borrowed value does not live long enough
-...
-LL | }
-   | - `*v` dropped here while still borrowed
-   |
-   = note: borrowed value must be valid for the static lifetime...
-
-error: aborting due to 3 previous errors
-
-Some errors occurred: E0310, E0597.
-For more information about an error, try `rustc --explain E0310`.
diff --git a/src/test/ui/regions/regions-close-over-type-parameter-1.nll.stderr b/src/test/ui/regions/regions-close-over-type-parameter-1.nll.stderr
deleted file mode 100644
index 6b8406cdb6e5e..0000000000000
--- a/src/test/ui/regions/regions-close-over-type-parameter-1.nll.stderr
+++ /dev/null
@@ -1,20 +0,0 @@
-error[E0310]: the parameter type `A` may not live long enough
-  --> $DIR/regions-close-over-type-parameter-1.rs:20:5
-   |
-LL |     box v as Box<SomeTrait+'static>
-   |     ^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `A: 'static`...
-
-error[E0309]: the parameter type `A` may not live long enough
-  --> $DIR/regions-close-over-type-parameter-1.rs:30:5
-   |
-LL |     box v as Box<SomeTrait+'b>
-   |     ^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `A: 'b`...
-
-error: aborting due to 2 previous errors
-
-Some errors occurred: E0309, E0310.
-For more information about an error, try `rustc --explain E0309`.
diff --git a/src/test/ui/regions/regions-close-over-type-parameter-multiple.nll.stderr b/src/test/ui/regions/regions-close-over-type-parameter-multiple.nll.stderr
deleted file mode 100644
index 017e912688849..0000000000000
--- a/src/test/ui/regions/regions-close-over-type-parameter-multiple.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error[E0309]: the parameter type `A` may not live long enough
-  --> $DIR/regions-close-over-type-parameter-multiple.rs:30:5
-   |
-LL |     box v as Box<SomeTrait+'a> //~ ERROR cannot infer an appropriate lifetime
-   |     ^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `A: 'c`...
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0309`.
diff --git a/src/test/ui/regions/regions-close-param-into-object.nll.stderr b/src/test/ui/regions/regions-close-param-into-object.nll.stderr
deleted file mode 100644
index c1c7e1b71c986..0000000000000
--- a/src/test/ui/regions/regions-close-param-into-object.nll.stderr
+++ /dev/null
@@ -1,36 +0,0 @@
-error[E0310]: the parameter type `T` may not live long enough
-  --> $DIR/regions-close-param-into-object.rs:16:5
-   |
-LL |     Box::new(v) //~ ERROR parameter type `T` may not live long enough
-   |     ^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `T: 'static`...
-
-error[E0310]: the parameter type `T` may not live long enough
-  --> $DIR/regions-close-param-into-object.rs:22:5
-   |
-LL |     Box::new(v) //~ ERROR parameter type `T` may not live long enough
-   |     ^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `T: 'static`...
-
-error[E0309]: the parameter type `T` may not live long enough
-  --> $DIR/regions-close-param-into-object.rs:28:5
-   |
-LL |     Box::new(v) //~ ERROR parameter type `T` may not live long enough
-   |     ^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `T: 'a`...
-
-error[E0309]: the parameter type `T` may not live long enough
-  --> $DIR/regions-close-param-into-object.rs:34:5
-   |
-LL |     Box::new(v) //~ ERROR parameter type `T` may not live long enough
-   |     ^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `T: 'a`...
-
-error: aborting due to 4 previous errors
-
-Some errors occurred: E0309, E0310.
-For more information about an error, try `rustc --explain E0309`.
diff --git a/src/test/ui/regions/regions-creating-enums3.nll.stderr b/src/test/ui/regions/regions-creating-enums3.nll.stderr
deleted file mode 100644
index aeb4fc67f55ed..0000000000000
--- a/src/test/ui/regions/regions-creating-enums3.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-creating-enums3.rs:17:5
-   |
-LL | fn mk_add_bad1<'a,'b>(x: &'a ast<'a>, y: &'b ast<'b>) -> ast<'a> {
-   |                -- -- lifetime `'b` defined here
-   |                |
-   |                lifetime `'a` defined here
-LL |     ast::add(x, y) //~ ERROR 17:5: 17:19: lifetime mismatch [E0623]
-   |     ^^^^^^^^^^^^^^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-creating-enums4.nll.stderr b/src/test/ui/regions/regions-creating-enums4.nll.stderr
deleted file mode 100644
index 9c68c9bca49f2..0000000000000
--- a/src/test/ui/regions/regions-creating-enums4.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-creating-enums4.rs:17:5
-   |
-LL | fn mk_add_bad2<'a,'b>(x: &'a ast<'a>, y: &'a ast<'a>, z: &ast) -> ast<'b> {
-   |                -- -- lifetime `'b` defined here
-   |                |
-   |                lifetime `'a` defined here
-LL |     ast::add(x, y) //~ ERROR cannot infer
-   |     ^^^^^^^^^^^^^^ returning this value requires that `'a` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-early-bound-error-method.nll.stderr b/src/test/ui/regions/regions-early-bound-error-method.nll.stderr
deleted file mode 100644
index e6c60b301a041..0000000000000
--- a/src/test/ui/regions/regions-early-bound-error-method.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-early-bound-error-method.rs:30:9
-   |
-LL | impl<'a> Box<'a> {
-   |      -- lifetime `'a` defined here
-LL |     fn or<'b,G:GetRef<'b>>(&self, g2: G) -> &'a isize {
-   |           -- lifetime `'b` defined here
-LL |         g2.get()
-   |         ^^^^^^^^ returning this value requires that `'b` must outlive `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-early-bound-error.nll.stderr b/src/test/ui/regions/regions-early-bound-error.nll.stderr
deleted file mode 100644
index 3c95e977fb366..0000000000000
--- a/src/test/ui/regions/regions-early-bound-error.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-early-bound-error.rs:29:5
-   |
-LL | fn get<'a,'b,G:GetRef<'a, isize>>(g1: G, b: &'b isize) -> &'b isize {
-   |        -- -- lifetime `'b` defined here
-   |        |
-   |        lifetime `'a` defined here
-LL |     g1.get()
-   |     ^^^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-escape-method.nll.stderr b/src/test/ui/regions/regions-escape-method.nll.stderr
deleted file mode 100644
index ffcd1b6bd7b33..0000000000000
--- a/src/test/ui/regions/regions-escape-method.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-escape-method.rs:25:13
-   |
-LL |     s.f(|p| p) //~ ERROR cannot infer
-   |          -- ^ returning this value requires that `'1` must outlive `'2`
-   |          ||
-   |          |return type of closure is &'2 i32
-   |          has type `&'1 i32`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-escape-via-trait-or-not.nll.stderr b/src/test/ui/regions/regions-escape-via-trait-or-not.nll.stderr
deleted file mode 100644
index 36a79d52fd002..0000000000000
--- a/src/test/ui/regions/regions-escape-via-trait-or-not.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-escape-via-trait-or-not.rs:28:14
-   |
-LL |     with(|o| o) //~ ERROR cannot infer
-   |           -- ^ returning this value requires that `'1` must outlive `'2`
-   |           ||
-   |           |return type of closure is &'2 isize
-   |           has type `&'1 isize`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-free-region-ordering-callee.nll.stderr b/src/test/ui/regions/regions-free-region-ordering-callee.nll.stderr
deleted file mode 100644
index d060629571319..0000000000000
--- a/src/test/ui/regions/regions-free-region-ordering-callee.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-free-region-ordering-callee.rs:23:5
-   |
-LL | fn ordering2<'a, 'b>(x: &'a &'b usize, y: &'a usize) -> &'b usize {
-   |              --  -- lifetime `'b` defined here
-   |              |
-   |              lifetime `'a` defined here
-LL |     // However, it is not safe to assume that 'b <= 'a
-LL |     &*y //~ ERROR 23:5: 23:8: lifetime mismatch [E0623]
-   |     ^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-free-region-ordering-callee.rs:28:24
-   |
-LL | fn ordering3<'a, 'b>(x: &'a usize, y: &'b usize) -> &'a &'b usize {
-   |              --  -- lifetime `'b` defined here
-   |              |
-   |              lifetime `'a` defined here
-LL |     // Do not infer an ordering from the return value.
-LL |     let z: &'b usize = &*x;
-   |                        ^^^ assignment requires that `'a` must outlive `'b`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/regions/regions-free-region-ordering-caller.nll.stderr b/src/test/ui/regions/regions-free-region-ordering-caller.nll.stderr
deleted file mode 100644
index 8d4f3d1e87fba..0000000000000
--- a/src/test/ui/regions/regions-free-region-ordering-caller.nll.stderr
+++ /dev/null
@@ -1,33 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-free-region-ordering-caller.rs:18:12
-   |
-LL | fn call2<'a, 'b>(a: &'a usize, b: &'b usize) {
-   |          --  -- lifetime `'b` defined here
-   |          |
-   |          lifetime `'a` defined here
-LL |     let z: Option<&'b &'a usize> = None;//~ ERROR E0623
-   |            ^^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'a` must outlive `'b`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-free-region-ordering-caller.rs:23:12
-   |
-LL | fn call3<'a, 'b>(a: &'a usize, b: &'b usize) {
-   |          --  -- lifetime `'b` defined here
-   |          |
-   |          lifetime `'a` defined here
-LL |     let y: Paramd<'a> = Paramd { x: a };
-LL |     let z: Option<&'b Paramd<'a>> = None;//~ ERROR E0623
-   |            ^^^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'a` must outlive `'b`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-free-region-ordering-caller.rs:27:12
-   |
-LL | fn call4<'a, 'b>(a: &'a usize, b: &'b usize) {
-   |          --  -- lifetime `'b` defined here
-   |          |
-   |          lifetime `'a` defined here
-LL |     let z: Option<&'a &'b usize> = None;//~ ERROR E0623
-   |            ^^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'b` must outlive `'a`
-
-error: aborting due to 3 previous errors
-
diff --git a/src/test/ui/regions/regions-free-region-ordering-incorrect.nll.stderr b/src/test/ui/regions/regions-free-region-ordering-incorrect.nll.stderr
deleted file mode 100644
index 10259ccf270e8..0000000000000
--- a/src/test/ui/regions/regions-free-region-ordering-incorrect.nll.stderr
+++ /dev/null
@@ -1,15 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-free-region-ordering-incorrect.rs:25:5
-   |
-LL |   impl<'b, T> Node<'b, T> {
-   |        -- lifetime `'b` defined here
-LL |     fn get<'a>(&'a self) -> &'b T {
-   |            -- lifetime `'a` defined here
-LL | /     match self.next {
-LL | |       Some(ref next) => next.get(),
-LL | |       None => &self.val //~ ERROR cannot infer
-LL | |     }
-   | |_____^ returning this value requires that `'a` must outlive `'b`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-implied-bounds-projection-gap-1.nll.stderr b/src/test/ui/regions/regions-implied-bounds-projection-gap-1.nll.stderr
deleted file mode 100644
index 2eb4ccf1c35f3..0000000000000
--- a/src/test/ui/regions/regions-implied-bounds-projection-gap-1.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error[E0309]: the parameter type `T` may not live long enough
-  --> $DIR/regions-implied-bounds-projection-gap-1.rs:26:5
-   |
-LL |     wf::<&'x T>();
-   |     ^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `T: 'x`...
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0309`.
diff --git a/src/test/ui/regions/regions-infer-bound-from-trait-self.nll.stderr b/src/test/ui/regions/regions-infer-bound-from-trait-self.nll.stderr
deleted file mode 100644
index 9fc58273c941e..0000000000000
--- a/src/test/ui/regions/regions-infer-bound-from-trait-self.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error[E0309]: the parameter type `Self` may not live long enough
-  --> $DIR/regions-infer-bound-from-trait-self.rs:56:9
-   |
-LL |         check_bound(x, self)
-   |         ^^^^^^^^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `Self: 'a`...
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0309`.
diff --git a/src/test/ui/regions/regions-infer-bound-from-trait.nll.stderr b/src/test/ui/regions/regions-infer-bound-from-trait.nll.stderr
deleted file mode 100644
index ace8f14c734a0..0000000000000
--- a/src/test/ui/regions/regions-infer-bound-from-trait.nll.stderr
+++ /dev/null
@@ -1,19 +0,0 @@
-error[E0309]: the parameter type `A` may not live long enough
-  --> $DIR/regions-infer-bound-from-trait.rs:43:5
-   |
-LL |     check_bound(x, a) //~ ERROR parameter type `A` may not live long enough
-   |     ^^^^^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `A: 'a`...
-
-error[E0309]: the parameter type `A` may not live long enough
-  --> $DIR/regions-infer-bound-from-trait.rs:47:5
-   |
-LL |     check_bound(x, a) //~ ERROR parameter type `A` may not live long enough
-   |     ^^^^^^^^^^^^^^^^^
-   |
-   = help: consider adding an explicit lifetime bound `A: 'a`...
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0309`.
diff --git a/src/test/ui/regions/regions-infer-call-3.nll.stderr b/src/test/ui/regions/regions-infer-call-3.nll.stderr
deleted file mode 100644
index 30b892d3710f2..0000000000000
--- a/src/test/ui/regions/regions-infer-call-3.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-infer-call-3.rs:18:24
-   |
-LL |     let z = with(|y| { select(x, y) });
-   |                   --   ^^^^^^^^^^^^ returning this value requires that `'1` must outlive `'2`
-   |                   ||
-   |                   |return type of closure is &'2 isize
-   |                   has type `&'1 isize`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-infer-contravariance-due-to-decl.nll.stderr b/src/test/ui/regions/regions-infer-contravariance-due-to-decl.nll.stderr
deleted file mode 100644
index aba285d427b47..0000000000000
--- a/src/test/ui/regions/regions-infer-contravariance-due-to-decl.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-infer-contravariance-due-to-decl.rs:35:12
-   |
-LL | fn use_<'short,'long>(c: Contravariant<'short>,
-   |         ------ ----- lifetime `'long` defined here
-   |         |
-   |         lifetime `'short` defined here
-...
-LL |     let _: Contravariant<'long> = c; //~ ERROR E0623
-   |            ^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'short` must outlive `'long`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-infer-covariance-due-to-decl.nll.stderr b/src/test/ui/regions/regions-infer-covariance-due-to-decl.nll.stderr
deleted file mode 100644
index 8bc6d565cf1b2..0000000000000
--- a/src/test/ui/regions/regions-infer-covariance-due-to-decl.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-infer-covariance-due-to-decl.rs:32:12
-   |
-LL | fn use_<'short,'long>(c: Covariant<'long>,
-   |         ------ ----- lifetime `'long` defined here
-   |         |
-   |         lifetime `'short` defined here
-...
-LL |     let _: Covariant<'short> = c; //~ ERROR E0623
-   |            ^^^^^^^^^^^^^^^^^ type annotation requires that `'short` must outlive `'long`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-infer-invariance-due-to-decl.nll.stderr b/src/test/ui/regions/regions-infer-invariance-due-to-decl.nll.stderr
deleted file mode 100644
index 23a719e5503a1..0000000000000
--- a/src/test/ui/regions/regions-infer-invariance-due-to-decl.nll.stderr
+++ /dev/null
@@ -1,10 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-infer-invariance-due-to-decl.rs:22:5
-   |
-LL | fn to_longer_lifetime<'r>(b_isize: invariant<'r>) -> invariant<'static> {
-   |                       -- lifetime `'r` defined here
-LL |     b_isize //~ ERROR mismatched types
-   |     ^^^^^^^ returning this value requires that `'r` must outlive `'static`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-infer-invariance-due-to-mutability-3.nll.stderr b/src/test/ui/regions/regions-infer-invariance-due-to-mutability-3.nll.stderr
deleted file mode 100644
index ff0a6adec049d..0000000000000
--- a/src/test/ui/regions/regions-infer-invariance-due-to-mutability-3.nll.stderr
+++ /dev/null
@@ -1,10 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-infer-invariance-due-to-mutability-3.rs:21:5
-   |
-LL | fn to_longer_lifetime<'r>(b_isize: invariant<'r>) -> invariant<'static> {
-   |                       -- lifetime `'r` defined here
-LL |     b_isize //~ ERROR mismatched types
-   |     ^^^^^^^ returning this value requires that `'r` must outlive `'static`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-infer-invariance-due-to-mutability-4.nll.stderr b/src/test/ui/regions/regions-infer-invariance-due-to-mutability-4.nll.stderr
deleted file mode 100644
index c296397954a76..0000000000000
--- a/src/test/ui/regions/regions-infer-invariance-due-to-mutability-4.nll.stderr
+++ /dev/null
@@ -1,10 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-infer-invariance-due-to-mutability-4.rs:21:5
-   |
-LL | fn to_longer_lifetime<'r>(b_isize: Invariant<'r>) -> Invariant<'static> {
-   |                       -- lifetime `'r` defined here
-LL |     b_isize //~ ERROR mismatched types
-   |     ^^^^^^^ returning this value requires that `'r` must outlive `'static`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-infer-not-param.nll.stderr b/src/test/ui/regions/regions-infer-not-param.nll.stderr
deleted file mode 100644
index faeaa5eda02c6..0000000000000
--- a/src/test/ui/regions/regions-infer-not-param.nll.stderr
+++ /dev/null
@@ -1,26 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-infer-not-param.rs:25:54
-   |
-LL | fn take_direct<'a,'b>(p: direct<'a>) -> direct<'b> { p } //~ ERROR mismatched types
-   |                -- -- lifetime `'b` defined here      ^ returning this value requires that `'a` must outlive `'b`
-   |                |
-   |                lifetime `'a` defined here
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-infer-not-param.rs:29:63
-   |
-LL | fn take_indirect2<'a,'b>(p: indirect2<'a>) -> indirect2<'b> { p } //~ ERROR mismatched types
-   |                   -- -- lifetime `'b` defined here            ^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'b`
-   |                   |
-   |                   lifetime `'a` defined here
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-infer-not-param.rs:29:63
-   |
-LL | fn take_indirect2<'a,'b>(p: indirect2<'a>) -> indirect2<'b> { p } //~ ERROR mismatched types
-   |                   -- -- lifetime `'b` defined here            ^ returning this value requires that `'a` must outlive `'b`
-   |                   |
-   |                   lifetime `'a` defined here
-
-error: aborting due to 3 previous errors
-
diff --git a/src/test/ui/regions/regions-infer-paramd-indirect.nll.stderr b/src/test/ui/regions/regions-infer-paramd-indirect.nll.stderr
deleted file mode 100644
index 7558c5caa0e24..0000000000000
--- a/src/test/ui/regions/regions-infer-paramd-indirect.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-infer-paramd-indirect.rs:33:9
-   |
-LL | impl<'a> set_f<'a> for c<'a> {
-   |      -- lifetime `'a` defined here
-...
-LL |     fn set_f_bad(&mut self, b: Box<b>) {
-   |                             - has type `std::boxed::Box<std::boxed::Box<&'1 isize>>`
-LL |         self.f = b;
-   |         ^^^^^^ assignment requires that `'1` must outlive `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-lifetime-bounds-on-fns.nll.stderr b/src/test/ui/regions/regions-lifetime-bounds-on-fns.nll.stderr
deleted file mode 100644
index d1d98a26a41fa..0000000000000
--- a/src/test/ui/regions/regions-lifetime-bounds-on-fns.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error[E0308]: mismatched types
-  --> $DIR/regions-lifetime-bounds-on-fns.rs:30:43
-   |
-LL |     let _: fn(&mut &isize, &mut &isize) = a; //~ ERROR mismatched types
-   |                                           ^ expected concrete lifetime, found bound lifetime parameter
-   |
-   = note: expected type `for<'r, 's, 't0, 't1> fn(&'r mut &'s isize, &'t0 mut &'t1 isize)`
-              found type `for<'r, 's> fn(&'r mut &isize, &'s mut &isize) {a::<'_, '_>}`
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0308`.
diff --git a/src/test/ui/regions/regions-nested-fns.nll.stderr b/src/test/ui/regions/regions-nested-fns.nll.stderr
deleted file mode 100644
index cbc1e6b787db5..0000000000000
--- a/src/test/ui/regions/regions-nested-fns.nll.stderr
+++ /dev/null
@@ -1,49 +0,0 @@
-error: borrowed data escapes outside of closure
-  --> $DIR/regions-nested-fns.rs:20:9
-   |
-LL |     let mut ay = &y; //~ ERROR E0495
-   |         ------ `ay` is declared here, outside of the closure body
-LL | 
-LL |     ignore::<Box<for<'z> FnMut(&'z isize)>>(Box::new(|z| {
-   |                                                       - `z` is a reference that is only valid in the closure body
-...
-LL |         ay = z;
-   |         ^^^^^^ `z` escapes the closure body here
-
-error[E0597]: `y` does not live long enough
-  --> $DIR/regions-nested-fns.rs:15:18
-   |
-LL |     let mut ay = &y; //~ ERROR E0495
-   |                  ^^ borrowed value does not live long enough
-...
-LL | }
-   | - `y` dropped here while still borrowed
-   |
-   = note: borrowed value must be valid for the static lifetime...
-
-error[E0597]: `y` does not live long enough
-  --> $DIR/regions-nested-fns.rs:19:15
-   |
-LL |     ignore::<Box<for<'z> FnMut(&'z isize)>>(Box::new(|z| {
-   |                                                      --- value captured here
-LL |         ay = x;
-LL |         ay = &y;
-   |               ^ borrowed value does not live long enough
-...
-LL | }
-   | - `y` dropped here while still borrowed
-   |
-   = note: borrowed value must be valid for the static lifetime...
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-nested-fns.rs:24:27
-   |
-LL | fn nested<'x>(x: &'x isize) {
-   |           -- lifetime `'x` defined here
-...
-LL |         if false { return x; } //~ ERROR E0312
-   |                           ^ returning this value requires that `'x` must outlive `'static`
-
-error: aborting due to 4 previous errors
-
-For more information about this error, try `rustc --explain E0597`.
diff --git a/src/test/ui/regions/regions-outlives-projection-container-hrtb.nll.stderr b/src/test/ui/regions/regions-outlives-projection-container-hrtb.nll.stderr
deleted file mode 100644
index 6db1f6f4e78a4..0000000000000
--- a/src/test/ui/regions/regions-outlives-projection-container-hrtb.nll.stderr
+++ /dev/null
@@ -1,9 +0,0 @@
-error: compilation successful
-  --> $DIR/regions-outlives-projection-container-hrtb.rs:68:1
-   |
-LL | / fn main() {
-LL | | }
-   | |_^
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-outlives-projection-container-wc.nll.stderr b/src/test/ui/regions/regions-outlives-projection-container-wc.nll.stderr
deleted file mode 100644
index 836f8c28a737a..0000000000000
--- a/src/test/ui/regions/regions-outlives-projection-container-wc.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-outlives-projection-container-wc.rs:46:13
-   |
-LL | fn with_assoc<'a,'b>() {
-   |               -- -- lifetime `'b` defined here
-   |               |
-   |               lifetime `'a` defined here
-...
-LL |     let _x: &'a WithAssoc<TheType<'b>> = loop { };
-   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'b` must outlive `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-outlives-projection-container.nll.stderr b/src/test/ui/regions/regions-outlives-projection-container.nll.stderr
deleted file mode 100644
index 126f50577c84f..0000000000000
--- a/src/test/ui/regions/regions-outlives-projection-container.nll.stderr
+++ /dev/null
@@ -1,46 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-outlives-projection-container.rs:50:13
-   |
-LL | fn with_assoc<'a,'b>() {
-   |               -- -- lifetime `'b` defined here
-   |               |
-   |               lifetime `'a` defined here
-...
-LL |     let _x: &'a WithAssoc<TheType<'b>> = loop { };
-   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'b` must outlive `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-outlives-projection-container.rs:68:13
-   |
-LL | fn without_assoc<'a,'b>() {
-   |                  -- -- lifetime `'b` defined here
-   |                  |
-   |                  lifetime `'a` defined here
-...
-LL |     let _x: &'a WithoutAssoc<TheType<'b>> = loop { };
-   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'b` must outlive `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-outlives-projection-container.rs:77:5
-   |
-LL | fn call_with_assoc<'a,'b>() {
-   |                    -- -- lifetime `'b` defined here
-   |                    |
-   |                    lifetime `'a` defined here
-...
-LL |     call::<&'a WithAssoc<TheType<'b>>>();
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'b` must outlive `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-outlives-projection-container.rs:84:5
-   |
-LL | fn call_without_assoc<'a,'b>() {
-   |                       -- -- lifetime `'b` defined here
-   |                       |
-   |                       lifetime `'a` defined here
-...
-LL |     call::<&'a WithoutAssoc<TheType<'b>>>(); //~ ERROR reference has a longer lifetime
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'b` must outlive `'a`
-
-error: aborting due to 4 previous errors
-
diff --git a/src/test/ui/regions/regions-reborrow-from-shorter-mut-ref-mut-ref.nll.stderr b/src/test/ui/regions/regions-reborrow-from-shorter-mut-ref-mut-ref.nll.stderr
deleted file mode 100644
index 48cd2d5a60bc1..0000000000000
--- a/src/test/ui/regions/regions-reborrow-from-shorter-mut-ref-mut-ref.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-reborrow-from-shorter-mut-ref-mut-ref.rs:14:5
-   |
-LL | fn copy_borrowed_ptr<'a, 'b, 'c>(p: &'a mut &'b mut &'c mut isize) -> &'b mut isize {
-   |                      --  -- lifetime `'b` defined here
-   |                      |
-   |                      lifetime `'a` defined here
-LL |     &mut ***p //~ ERROR 14:5: 14:14: lifetime mismatch [E0623]
-   |     ^^^^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-reborrow-from-shorter-mut-ref.nll.stderr b/src/test/ui/regions/regions-reborrow-from-shorter-mut-ref.nll.stderr
deleted file mode 100644
index 02c7ce33aabac..0000000000000
--- a/src/test/ui/regions/regions-reborrow-from-shorter-mut-ref.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-reborrow-from-shorter-mut-ref.rs:16:5
-   |
-LL | fn copy_borrowed_ptr<'a, 'b>(p: &'a mut &'b mut isize) -> &'b mut isize {
-   |                      --  -- lifetime `'b` defined here
-   |                      |
-   |                      lifetime `'a` defined here
-LL |     &mut **p //~ ERROR 16:5: 16:13: lifetime mismatch [E0623]
-   |     ^^^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-ret-borrowed-1.nll.stderr b/src/test/ui/regions/regions-ret-borrowed-1.nll.stderr
deleted file mode 100644
index 5df6bca72fa0a..0000000000000
--- a/src/test/ui/regions/regions-ret-borrowed-1.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-ret-borrowed-1.rs:20:14
-   |
-LL |     with(|o| o)
-   |           -- ^ returning this value requires that `'1` must outlive `'2`
-   |           ||
-   |           |return type of closure is &'2 isize
-   |           has type `&'1 isize`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-ret-borrowed.nll.stderr b/src/test/ui/regions/regions-ret-borrowed.nll.stderr
deleted file mode 100644
index b36191ada61c7..0000000000000
--- a/src/test/ui/regions/regions-ret-borrowed.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-ret-borrowed.rs:23:14
-   |
-LL |     with(|o| o)
-   |           -- ^ returning this value requires that `'1` must outlive `'2`
-   |           ||
-   |           |return type of closure is &'2 isize
-   |           has type `&'1 isize`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-return-ref-to-upvar-issue-17403.nll.stderr b/src/test/ui/regions/regions-return-ref-to-upvar-issue-17403.nll.stderr
deleted file mode 100644
index 300a563982253..0000000000000
--- a/src/test/ui/regions/regions-return-ref-to-upvar-issue-17403.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: captured variable cannot escape `FnMut` closure body
-  --> $DIR/regions-return-ref-to-upvar-issue-17403.rs:17:24
-   |
-LL |         let mut f = || &mut x; //~ ERROR cannot infer
-   |                      - ^^^^^^ returns a reference to a captured variable which escapes the closure body
-   |                      |
-   |                      inferred to be a `FnMut` closure
-   |
-   = note: `FnMut` closures only have access to their captured variables while they are executing...
-   = note: ...therefore, they cannot allow references to captured variables to escape
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-static-bound.ll.nll.stderr b/src/test/ui/regions/regions-static-bound.ll.nll.stderr
deleted file mode 100644
index dc3a32cec6ac7..0000000000000
--- a/src/test/ui/regions/regions-static-bound.ll.nll.stderr
+++ /dev/null
@@ -1,49 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-static-bound.rs:19:5
-   |
-LL | fn static_id_wrong_way<'a>(t: &'a ()) -> &'static () where 'static: 'a {
-   |                        -- lifetime `'a` defined here
-LL |     t //[ll]~ ERROR E0312
-   |     ^ returning this value requires that `'a` must outlive `'static`
-
-error[E0621]: explicit lifetime required in the type of `u`
-  --> $DIR/regions-static-bound.rs:24:5
-   |
-LL | fn error(u: &(), v: &()) {
-   |             --- help: add explicit lifetime `'static` to the type of `u`: `&'static ()`
-LL |     static_id(&u); //[ll]~ ERROR explicit lifetime required in the type of `u` [E0621]
-   |     ^^^^^^^^^^^^^ lifetime `'static` required
-
-error[E0621]: explicit lifetime required in the type of `v`
-  --> $DIR/regions-static-bound.rs:27:5
-   |
-LL | fn error(u: &(), v: &()) {
-   |                     --- help: add explicit lifetime `'static` to the type of `v`: `&'static ()`
-...
-LL |     static_id_indirect(&v); //[ll]~ ERROR explicit lifetime required in the type of `v` [E0621]
-   |     ^^^^^^^^^^^^^^^^^^^^^^ lifetime `'static` required
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-static-bound.rs:24:5
-   |
-LL | fn error(u: &(), v: &()) {
-   |             -       - let's call the lifetime of this reference `'2`
-   |             |
-   |             let's call the lifetime of this reference `'1`
-LL |     static_id(&u); //[ll]~ ERROR explicit lifetime required in the type of `u` [E0621]
-   |     ^^^^^^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-static-bound.rs:27:5
-   |
-LL | fn error(u: &(), v: &()) {
-   |             -       - let's call the lifetime of this reference `'1`
-   |             |
-   |             let's call the lifetime of this reference `'2`
-...
-LL |     static_id_indirect(&v); //[ll]~ ERROR explicit lifetime required in the type of `v` [E0621]
-   |     ^^^^^^^^^^^^^^^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: aborting due to 5 previous errors
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/regions/regions-trait-object-subtyping.nll.stderr b/src/test/ui/regions/regions-trait-object-subtyping.nll.stderr
deleted file mode 100644
index 0a9bcee1ce29d..0000000000000
--- a/src/test/ui/regions/regions-trait-object-subtyping.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-trait-object-subtyping.rs:25:5
-   |
-LL | fn foo3<'a,'b>(x: &'a mut Dummy) -> &'b mut Dummy {
-   |         -- -- lifetime `'b` defined here
-   |         |
-   |         lifetime `'a` defined here
-LL |     // Without knowing 'a:'b, we can't coerce
-LL |     x //~ ERROR lifetime bound not satisfied
-   |     ^ cast requires that `'a` must outlive `'b`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-trait-object-subtyping.rs:32:5
-   |
-LL | fn foo4<'a:'b,'b>(x: Wrapper<&'a mut Dummy>) -> Wrapper<&'b mut Dummy> {
-   |         --    -- lifetime `'b` defined here
-   |         |
-   |         lifetime `'a` defined here
-LL |     // We can't coerce because it is packed in `Wrapper`
-LL |     x //~ ERROR mismatched types
-   |     ^ returning this value requires that `'b` must outlive `'a`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/regions/regions-variance-contravariant-use-covariant-in-second-position.nll.stderr b/src/test/ui/regions/regions-variance-contravariant-use-covariant-in-second-position.nll.stderr
deleted file mode 100644
index 668b75f5733a2..0000000000000
--- a/src/test/ui/regions/regions-variance-contravariant-use-covariant-in-second-position.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-variance-contravariant-use-covariant-in-second-position.rs:35:12
-   |
-LL | fn use_<'short,'long>(c: S<'long, 'short>,
-   |         ------ ----- lifetime `'long` defined here
-   |         |
-   |         lifetime `'short` defined here
-...
-LL |     let _: S<'long, 'long> = c; //~ ERROR E0623
-   |            ^^^^^^^^^^^^^^^ type annotation requires that `'short` must outlive `'long`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-variance-contravariant-use-covariant.nll.stderr b/src/test/ui/regions/regions-variance-contravariant-use-covariant.nll.stderr
deleted file mode 100644
index 5d787e6dab699..0000000000000
--- a/src/test/ui/regions/regions-variance-contravariant-use-covariant.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-variance-contravariant-use-covariant.rs:33:12
-   |
-LL | fn use_<'short,'long>(c: Contravariant<'short>,
-   |         ------ ----- lifetime `'long` defined here
-   |         |
-   |         lifetime `'short` defined here
-...
-LL |     let _: Contravariant<'long> = c; //~ ERROR E0623
-   |            ^^^^^^^^^^^^^^^^^^^^ type annotation requires that `'short` must outlive `'long`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-variance-covariant-use-contravariant.nll.stderr b/src/test/ui/regions/regions-variance-covariant-use-contravariant.nll.stderr
deleted file mode 100644
index 3fb290096686d..0000000000000
--- a/src/test/ui/regions/regions-variance-covariant-use-contravariant.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-variance-covariant-use-contravariant.rs:33:12
-   |
-LL | fn use_<'short,'long>(c: Covariant<'long>,
-   |         ------ ----- lifetime `'long` defined here
-   |         |
-   |         lifetime `'short` defined here
-...
-LL |     let _: Covariant<'short> = c; //~ ERROR E0623
-   |            ^^^^^^^^^^^^^^^^^ type annotation requires that `'short` must outlive `'long`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-variance-invariant-use-contravariant.nll.stderr b/src/test/ui/regions/regions-variance-invariant-use-contravariant.nll.stderr
deleted file mode 100644
index fb59ec1ca1008..0000000000000
--- a/src/test/ui/regions/regions-variance-invariant-use-contravariant.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-variance-invariant-use-contravariant.rs:30:12
-   |
-LL | fn use_<'short,'long>(c: Invariant<'long>,
-   |         ------ ----- lifetime `'long` defined here
-   |         |
-   |         lifetime `'short` defined here
-...
-LL |     let _: Invariant<'short> = c; //~ ERROR E0623
-   |            ^^^^^^^^^^^^^^^^^ type annotation requires that `'short` must outlive `'long`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/regions/regions-variance-invariant-use-covariant.nll.stderr b/src/test/ui/regions/regions-variance-invariant-use-covariant.nll.stderr
deleted file mode 100644
index daf6a79136a54..0000000000000
--- a/src/test/ui/regions/regions-variance-invariant-use-covariant.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/regions-variance-invariant-use-covariant.rs:27:12
-   |
-LL | fn use_<'b>(c: Invariant<'b>) {
-   |         -- lifetime `'b` defined here
-...
-LL |     let _: Invariant<'static> = c; //~ ERROR mismatched types
-   |            ^^^^^^^^^^^^^^^^^^ type annotation requires that `'b` must outlive `'static`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/static/static-items-cant-move.nll.stderr b/src/test/ui/static/static-items-cant-move.nll.stderr
new file mode 100644
index 0000000000000..35a400b15089f
--- /dev/null
+++ b/src/test/ui/static/static-items-cant-move.nll.stderr
@@ -0,0 +1,18 @@
+error[E0507]: cannot move out of static item
+  --> $DIR/static-items-cant-move.rs:28:10
+   |
+LL |     test(BAR); //~ ERROR cannot move out of static item
+   |          ^^^ cannot move out of static item
+
+error[E0507]: cannot move out of immutable static item `BAR`
+  --> $DIR/static-items-cant-move.rs:28:10
+   |
+LL |     test(BAR); //~ ERROR cannot move out of static item
+   |          ^^^
+   |          |
+   |          cannot move out of immutable static item `BAR`
+   |          cannot move
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/std-uncopyable-atomics.nll.stderr b/src/test/ui/std-uncopyable-atomics.nll.stderr
index e6b612fed8588..d2576a4baf369 100644
--- a/src/test/ui/std-uncopyable-atomics.nll.stderr
+++ b/src/test/ui/std-uncopyable-atomics.nll.stderr
@@ -7,6 +7,15 @@ LL |     let x = *&x; //~ ERROR: cannot move out of borrowed content
    |             cannot move out of borrowed content
    |             help: consider removing the `*`: `&x`
 
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/std-uncopyable-atomics.rs:19:13
+   |
+LL |     let x = *&x; //~ ERROR: cannot move out of borrowed content
+   |             ^^^
+   |             |
+   |             cannot move out of data in a `&` reference
+   |             cannot move
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/std-uncopyable-atomics.rs:21:13
    |
@@ -16,6 +25,15 @@ LL |     let x = *&x; //~ ERROR: cannot move out of borrowed content
    |             cannot move out of borrowed content
    |             help: consider removing the `*`: `&x`
 
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/std-uncopyable-atomics.rs:21:13
+   |
+LL |     let x = *&x; //~ ERROR: cannot move out of borrowed content
+   |             ^^^
+   |             |
+   |             cannot move out of data in a `&` reference
+   |             cannot move
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/std-uncopyable-atomics.rs:23:13
    |
@@ -25,6 +43,15 @@ LL |     let x = *&x; //~ ERROR: cannot move out of borrowed content
    |             cannot move out of borrowed content
    |             help: consider removing the `*`: `&x`
 
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/std-uncopyable-atomics.rs:23:13
+   |
+LL |     let x = *&x; //~ ERROR: cannot move out of borrowed content
+   |             ^^^
+   |             |
+   |             cannot move out of data in a `&` reference
+   |             cannot move
+
 error[E0507]: cannot move out of borrowed content
   --> $DIR/std-uncopyable-atomics.rs:25:13
    |
@@ -34,6 +61,15 @@ LL |     let x = *&x; //~ ERROR: cannot move out of borrowed content
    |             cannot move out of borrowed content
    |             help: consider removing the `*`: `&x`
 
-error: aborting due to 4 previous errors
+error[E0507]: cannot move out of data in a `&` reference
+  --> $DIR/std-uncopyable-atomics.rs:25:13
+   |
+LL |     let x = *&x; //~ ERROR: cannot move out of borrowed content
+   |             ^^^
+   |             |
+   |             cannot move out of data in a `&` reference
+   |             cannot move
+
+error: aborting due to 8 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/thread-local-in-ctfe.nll.stderr b/src/test/ui/thread-local-in-ctfe.nll.stderr
index c9c0ac2b2d94b..05f8f34338003 100644
--- a/src/test/ui/thread-local-in-ctfe.nll.stderr
+++ b/src/test/ui/thread-local-in-ctfe.nll.stderr
@@ -10,13 +10,17 @@ error[E0625]: thread-local statics cannot be accessed at compile-time
 LL | static C: &u32 = &A;
    |                  ^^
 
-error[E0712]: thread-local variable borrowed past end of function
+warning[E0712]: thread-local variable borrowed past end of function
   --> $DIR/thread-local-in-ctfe.rs:19:18
    |
 LL | static C: &u32 = &A;
    |                  ^^- end of enclosing function is here
    |                  |
    |                  thread-local variables cannot be borrowed beyond the end of the function
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
 error[E0625]: thread-local statics cannot be accessed at compile-time
   --> $DIR/thread-local-in-ctfe.rs:22:16
@@ -30,13 +34,17 @@ error[E0625]: thread-local statics cannot be accessed at compile-time
 LL | const E: &u32 = &A;
    |                 ^^
 
-error[E0712]: thread-local variable borrowed past end of function
+warning[E0712]: thread-local variable borrowed past end of function
   --> $DIR/thread-local-in-ctfe.rs:25:17
    |
 LL | const E: &u32 = &A;
    |                 ^^- end of enclosing function is here
    |                 |
    |                 thread-local variables cannot be borrowed beyond the end of the function
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
 error[E0625]: thread-local statics cannot be accessed at compile-time
   --> $DIR/thread-local-in-ctfe.rs:29:5
@@ -44,7 +52,7 @@ error[E0625]: thread-local statics cannot be accessed at compile-time
 LL |     A
    |     ^
 
-error: aborting due to 7 previous errors
+error: aborting due to 5 previous errors
 
 Some errors occurred: E0625, E0712.
 For more information about an error, try `rustc --explain E0625`.
diff --git a/src/test/ui/trivial-bounds/trivial-bounds-leak-copy.nll.stderr b/src/test/ui/trivial-bounds/trivial-bounds-leak-copy.nll.stderr
new file mode 100644
index 0000000000000..9f56bf0538436
--- /dev/null
+++ b/src/test/ui/trivial-bounds/trivial-bounds-leak-copy.nll.stderr
@@ -0,0 +1,20 @@
+error[E0507]: cannot move out of borrowed content
+  --> $DIR/trivial-bounds-leak-copy.rs:19:5
+   |
+LL |     *t //~ ERROR
+   |     ^^ cannot move out of borrowed content
+
+error[E0507]: cannot move out of `*t` which is behind a `&` reference
+  --> $DIR/trivial-bounds-leak-copy.rs:19:5
+   |
+LL | fn move_out_string(t: &String) -> String {
+   |                       ------- help: consider changing this to be a mutable reference: `&mut std::string::String`
+LL |     *t //~ ERROR
+   |     ^^
+   |     |
+   |     cannot move out of `*t` which is behind a `&` reference
+   |     `t` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/unboxed-closures/unboxed-closure-illegal-move.nll.stderr b/src/test/ui/unboxed-closures/unboxed-closure-illegal-move.nll.stderr
index 4baa54e34c755..625084efec2ff 100644
--- a/src/test/ui/unboxed-closures/unboxed-closure-illegal-move.nll.stderr
+++ b/src/test/ui/unboxed-closures/unboxed-closure-illegal-move.nll.stderr
@@ -6,6 +6,21 @@ LL |         let x = Box::new(0);
 LL |         let f = to_fn(|| drop(x)); //~ ERROR cannot move
    |                               ^ cannot move out of captured variable in an `Fn` closure
 
+error[E0507]: cannot move out of `x`, as it is a captured variable in a `Fn` closure
+  --> $DIR/unboxed-closure-illegal-move.rs:25:31
+   |
+LL |         let f = to_fn(|| drop(x)); //~ ERROR cannot move
+   |                               ^
+   |                               |
+   |                               cannot move out of `x`, as it is a captured variable in a `Fn` closure
+   |                               cannot move
+   |
+help: consider changing this to accept closures that implement `FnMut`
+  --> $DIR/unboxed-closure-illegal-move.rs:25:23
+   |
+LL |         let f = to_fn(|| drop(x)); //~ ERROR cannot move
+   |                       ^^^^^^^^^^
+
 error[E0507]: cannot move out of captured variable in an `FnMut` closure
   --> $DIR/unboxed-closure-illegal-move.rs:29:35
    |
@@ -22,6 +37,21 @@ LL |         let x = Box::new(0);
 LL |         let f = to_fn(move || drop(x)); //~ ERROR cannot move
    |                                    ^ cannot move out of captured variable in an `Fn` closure
 
+error[E0507]: cannot move out of `x`, as it is a captured variable in a `Fn` closure
+  --> $DIR/unboxed-closure-illegal-move.rs:38:36
+   |
+LL |         let f = to_fn(move || drop(x)); //~ ERROR cannot move
+   |                                    ^
+   |                                    |
+   |                                    cannot move out of `x`, as it is a captured variable in a `Fn` closure
+   |                                    cannot move
+   |
+help: consider changing this to accept closures that implement `FnMut`
+  --> $DIR/unboxed-closure-illegal-move.rs:38:23
+   |
+LL |         let f = to_fn(move || drop(x)); //~ ERROR cannot move
+   |                       ^^^^^^^^^^^^^^^
+
 error[E0507]: cannot move out of captured variable in an `FnMut` closure
   --> $DIR/unboxed-closure-illegal-move.rs:42:40
    |
@@ -30,6 +60,6 @@ LL |         let x = Box::new(0);
 LL |         let f = to_fn_mut(move || drop(x)); //~ ERROR cannot move
    |                                        ^ cannot move out of captured variable in an `FnMut` closure
 
-error: aborting due to 4 previous errors
+error: aborting due to 6 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/src/test/ui/unboxed-closures/unboxed-closure-immutable-capture.nll.stderr b/src/test/ui/unboxed-closures/unboxed-closure-immutable-capture.nll.stderr
index 084d7ff3bcd61..ee91ea3b66f30 100644
--- a/src/test/ui/unboxed-closures/unboxed-closure-immutable-capture.nll.stderr
+++ b/src/test/ui/unboxed-closures/unboxed-closure-immutable-capture.nll.stderr
@@ -33,7 +33,7 @@ LL |     let x = 0;
 LL |     move || set(&mut x); //~ ERROR cannot borrow
    |                 ^^^^^^ cannot borrow as mutable
 
-error[E0594]: cannot assign to `x`, as it is not declared as mutable
+warning[E0594]: cannot assign to `x`, as it is not declared as mutable
   --> $DIR/unboxed-closure-immutable-capture.rs:23:8
    |
 LL |     let x = 0;
@@ -41,8 +41,12 @@ LL |     let x = 0;
 ...
 LL |     || x = 1; //~ ERROR cannot assign
    |        ^^^^^ cannot assign
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
-error[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
+warning[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
   --> $DIR/unboxed-closure-immutable-capture.rs:25:12
    |
 LL |     let x = 0;
@@ -50,8 +54,12 @@ LL |     let x = 0;
 ...
 LL |     || set(&mut x); //~ ERROR cannot assign
    |            ^^^^^^ cannot borrow as mutable
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
-error[E0594]: cannot assign to `x`, as it is not declared as mutable
+warning[E0594]: cannot assign to `x`, as it is not declared as mutable
   --> $DIR/unboxed-closure-immutable-capture.rs:26:8
    |
 LL |     let x = 0;
@@ -59,8 +67,12 @@ LL |     let x = 0;
 ...
 LL |     || x = 1; //~ ERROR cannot assign
    |        ^^^^^ cannot assign
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
-error[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
+warning[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
   --> $DIR/unboxed-closure-immutable-capture.rs:28:12
    |
 LL |     let x = 0;
@@ -68,8 +80,12 @@ LL |     let x = 0;
 ...
 LL |     || set(&mut x); //~ ERROR cannot assign
    |            ^^^^^^ cannot borrow as mutable
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
-error: aborting due to 8 previous errors
+error: aborting due to 4 previous errors
 
 Some errors occurred: E0594, E0596.
 For more information about an error, try `rustc --explain E0594`.
diff --git a/src/test/ui/unboxed-closures/unboxed-closures-infer-argument-types-two-region-pointers.nll.stderr b/src/test/ui/unboxed-closures/unboxed-closures-infer-argument-types-two-region-pointers.nll.stderr
deleted file mode 100644
index a3501290cd607..0000000000000
--- a/src/test/ui/unboxed-closures/unboxed-closures-infer-argument-types-two-region-pointers.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/unboxed-closures-infer-argument-types-two-region-pointers.rs:27:9
-   |
-LL |     doit(0, &|x, y| {
-   |               -  - has type `&'1 i32`
-   |               |
-   |               has type `&std::cell::Cell<&'2 i32>`
-LL |         x.set(y); //~ ERROR E0312
-   |         ^^^^^^^^ argument requires that `'1` must outlive `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/unboxed-closures/unboxed-closures-infer-fnmut-calling-fnmut-no-mut.nll.stderr b/src/test/ui/unboxed-closures/unboxed-closures-infer-fnmut-calling-fnmut-no-mut.nll.stderr
index 718c3a19938c4..fa0aba96e18be 100644
--- a/src/test/ui/unboxed-closures/unboxed-closures-infer-fnmut-calling-fnmut-no-mut.nll.stderr
+++ b/src/test/ui/unboxed-closures/unboxed-closures-infer-fnmut-calling-fnmut-no-mut.nll.stderr
@@ -1,4 +1,4 @@
-error[E0596]: cannot borrow `tick1` as mutable, as it is not declared as mutable
+warning[E0596]: cannot borrow `tick1` as mutable, as it is not declared as mutable
   --> $DIR/unboxed-closures-infer-fnmut-calling-fnmut-no-mut.rs:27:9
    |
 LL |     let tick1 = || {
@@ -6,6 +6,10 @@ LL |     let tick1 = || {
 ...
 LL |         tick1();
    |         ^^^^^ cannot borrow as mutable
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
 error[E0596]: cannot borrow `tick2` as mutable, as it is not declared as mutable
   --> $DIR/unboxed-closures-infer-fnmut-calling-fnmut-no-mut.rs:30:5
@@ -16,6 +20,6 @@ LL |     let tick2 = || { //~ ERROR closure cannot assign to immutable local var
 LL |     tick2(); //~ ERROR cannot borrow
    |     ^^^^^ cannot borrow as mutable
 
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
 For more information about this error, try `rustc --explain E0596`.
diff --git a/src/test/ui/unboxed-closures/unboxed-closures-mutate-upvar.nll.stderr b/src/test/ui/unboxed-closures/unboxed-closures-mutate-upvar.nll.stderr
index f765f207303d2..9858b8db2112d 100644
--- a/src/test/ui/unboxed-closures/unboxed-closures-mutate-upvar.nll.stderr
+++ b/src/test/ui/unboxed-closures/unboxed-closures-mutate-upvar.nll.stderr
@@ -1,4 +1,4 @@
-error[E0594]: cannot assign to `n`, as it is not declared as mutable
+warning[E0594]: cannot assign to `n`, as it is not declared as mutable
   --> $DIR/unboxed-closures-mutate-upvar.rs:25:9
    |
 LL |     let n = 0;
@@ -6,6 +6,10 @@ LL |     let n = 0;
 LL |     let mut f = to_fn_mut(|| { //~ ERROR closure cannot assign
 LL |         n += 1;
    |         ^^^^^^ cannot assign
+   |
+   = warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
+           It represents potential unsoundness in your code.
+           This warning will become a hard error in the future.
 
 error[E0594]: cannot assign to `n`, as it is not declared as mutable
   --> $DIR/unboxed-closures-mutate-upvar.rs:42:9
@@ -40,6 +44,6 @@ LL | |         n += 1; //~ ERROR cannot assign
 LL | |     });
    | |_____^
 
-error: aborting due to 4 previous errors
+error: aborting due to 3 previous errors
 
 For more information about this error, try `rustc --explain E0594`.
diff --git a/src/test/ui/underscore-lifetime/dyn-trait-underscore.nll.stderr b/src/test/ui/underscore-lifetime/dyn-trait-underscore.nll.stderr
deleted file mode 100644
index 7adb195b7d022..0000000000000
--- a/src/test/ui/underscore-lifetime/dyn-trait-underscore.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/dyn-trait-underscore.rs:18:5
-   |
-LL | fn a<T>(items: &[T]) -> Box<dyn Iterator<Item=&T>> {
-   |                - let's call the lifetime of this reference `'1`
-LL |     //                      ^^^^^^^^^^^^^^^^^^^^^ bound *here* defaults to `'static`
-LL |     Box::new(items.iter()) //~ ERROR cannot infer an appropriate lifetime
-   |     ^^^^^^^^^^^^^^^^^^^^^^ returning this value requires that `'1` must outlive `'static`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/underscore-lifetime/underscore-lifetime-elison-mismatch.nll.stderr b/src/test/ui/underscore-lifetime/underscore-lifetime-elison-mismatch.nll.stderr
deleted file mode 100644
index eedbfbf5f61a7..0000000000000
--- a/src/test/ui/underscore-lifetime/underscore-lifetime-elison-mismatch.nll.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/underscore-lifetime-elison-mismatch.rs:11:42
-   |
-LL | fn foo(x: &mut Vec<&'_ u8>, y: &'_ u8) { x.push(y); } //~ ERROR lifetime mismatch
-   |                    -           -         ^^^^^^^^^ argument requires that `'1` must outlive `'2`
-   |                    |           |
-   |                    |           let's call the lifetime of this reference `'1`
-   |                    let's call the lifetime of this reference `'2`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/unop-move-semantics.nll.stderr b/src/test/ui/unop-move-semantics.nll.stderr
index 111940aab2c32..8112ddbe2f16e 100644
--- a/src/test/ui/unop-move-semantics.nll.stderr
+++ b/src/test/ui/unop-move-semantics.nll.stderr
@@ -21,7 +21,19 @@ error[E0507]: cannot move out of borrowed content
 LL |     !*n;  //~ ERROR: cannot move out of borrowed content
    |      ^^ cannot move out of borrowed content
 
-error: aborting due to 3 previous errors
+error[E0507]: cannot move out of `*n` which is behind a `&` reference
+  --> $DIR/unop-move-semantics.rs:36:6
+   |
+LL |     let n = &y;
+   |             -- help: consider changing this to be a mutable reference: `&mut y`
+...
+LL |     !*n;  //~ ERROR: cannot move out of borrowed content
+   |      ^^
+   |      |
+   |      cannot move out of `*n` which is behind a `&` reference
+   |      `n` is a `&` reference, so the data it refers to cannot be moved
+
+error: aborting due to 4 previous errors
 
 Some errors occurred: E0382, E0507.
 For more information about an error, try `rustc --explain E0382`.
diff --git a/src/test/ui/variance/variance-btree-invariant-types.nll.stderr b/src/test/ui/variance/variance-btree-invariant-types.nll.stderr
deleted file mode 100644
index f09dcdf25dac9..0000000000000
--- a/src/test/ui/variance/variance-btree-invariant-types.nll.stderr
+++ /dev/null
@@ -1,106 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:16:5
-   |
-LL | fn iter_cov_key<'a, 'new>(v: IterMut<'a, &'static (), ()>) -> IterMut<'a, &'new (), ()> {
-   |                     ---- lifetime `'new` defined here
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:19:5
-   |
-LL | fn iter_cov_val<'a, 'new>(v: IterMut<'a, (), &'static ()>) -> IterMut<'a, (), &'new ()> {
-   |                     ---- lifetime `'new` defined here
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:22:5
-   |
-LL | fn iter_contra_key<'a, 'new>(v: IterMut<'a, &'new (), ()>) -> IterMut<'a, &'static (), ()> {
-   |                        ---- lifetime `'new` defined here
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:25:5
-   |
-LL | fn iter_contra_val<'a, 'new>(v: IterMut<'a, (), &'new ()>) -> IterMut<'a, (), &'static ()> {
-   |                        ---- lifetime `'new` defined here
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:30:5
-   |
-LL | fn occ_cov_key<'a, 'new>(v: OccupiedEntry<'a, &'static (), ()>)
-   |                    ---- lifetime `'new` defined here
-LL |                          -> OccupiedEntry<'a, &'new (), ()> {
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:34:5
-   |
-LL | fn occ_cov_val<'a, 'new>(v: OccupiedEntry<'a, (), &'static ()>)
-   |                    ---- lifetime `'new` defined here
-LL |                          -> OccupiedEntry<'a, (), &'new ()> {
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:38:5
-   |
-LL | fn occ_contra_key<'a, 'new>(v: OccupiedEntry<'a, &'new (), ()>)
-   |                       ---- lifetime `'new` defined here
-LL |                             -> OccupiedEntry<'a, &'static (), ()> {
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:42:5
-   |
-LL | fn occ_contra_val<'a, 'new>(v: OccupiedEntry<'a, (), &'new ()>)
-   |                       ---- lifetime `'new` defined here
-LL |                             -> OccupiedEntry<'a, (), &'static ()> {
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:47:5
-   |
-LL | fn vac_cov_key<'a, 'new>(v: VacantEntry<'a, &'static (), ()>)
-   |                    ---- lifetime `'new` defined here
-LL |                          -> VacantEntry<'a, &'new (), ()> {
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:51:5
-   |
-LL | fn vac_cov_val<'a, 'new>(v: VacantEntry<'a, (), &'static ()>)
-   |                    ---- lifetime `'new` defined here
-LL |                          -> VacantEntry<'a, (), &'new ()> {
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:55:5
-   |
-LL | fn vac_contra_key<'a, 'new>(v: VacantEntry<'a, &'new (), ()>)
-   |                       ---- lifetime `'new` defined here
-LL |                             -> VacantEntry<'a, &'static (), ()> {
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-btree-invariant-types.rs:59:5
-   |
-LL | fn vac_contra_val<'a, 'new>(v: VacantEntry<'a, (), &'new ()>)
-   |                       ---- lifetime `'new` defined here
-LL |                             -> VacantEntry<'a, (), &'static ()> {
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'new` must outlive `'static`
-
-error: aborting due to 12 previous errors
-
diff --git a/src/test/ui/variance/variance-cell-is-invariant.nll.stderr b/src/test/ui/variance/variance-cell-is-invariant.nll.stderr
deleted file mode 100644
index eb01c2bbb05b1..0000000000000
--- a/src/test/ui/variance/variance-cell-is-invariant.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-cell-is-invariant.rs:24:12
-   |
-LL | fn use_<'short,'long>(c: Foo<'short>,
-   |         ------ ----- lifetime `'long` defined here
-   |         |
-   |         lifetime `'short` defined here
-...
-LL |     let _: Foo<'long> = c; //~ ERROR E0623
-   |            ^^^^^^^^^^ type annotation requires that `'short` must outlive `'long`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/variance/variance-contravariant-arg-object.nll.stderr b/src/test/ui/variance/variance-contravariant-arg-object.nll.stderr
deleted file mode 100644
index a30720dc6ba8a..0000000000000
--- a/src/test/ui/variance/variance-contravariant-arg-object.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-contravariant-arg-object.rs:24:5
-   |
-LL | fn get_min_from_max<'min, 'max>(v: Box<Get<&'max i32>>)
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'min` must outlive `'max`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-contravariant-arg-object.rs:32:5
-   |
-LL | fn get_max_from_min<'min, 'max, G>(v: Box<Get<&'min i32>>)
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'min` must outlive `'max`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/variance/variance-contravariant-arg-trait-match.nll.stderr b/src/test/ui/variance/variance-contravariant-arg-trait-match.nll.stderr
deleted file mode 100644
index 69981699da8f1..0000000000000
--- a/src/test/ui/variance/variance-contravariant-arg-trait-match.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-contravariant-arg-trait-match.rs:23:5
-   |
-LL | fn get_min_from_max<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<G,&'min i32>() //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-contravariant-arg-trait-match.rs:31:5
-   |
-LL | fn get_max_from_min<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<G,&'max i32>() //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/variance/variance-contravariant-self-trait-match.nll.stderr b/src/test/ui/variance/variance-contravariant-self-trait-match.nll.stderr
deleted file mode 100644
index a8566814c6456..0000000000000
--- a/src/test/ui/variance/variance-contravariant-self-trait-match.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-contravariant-self-trait-match.rs:23:5
-   |
-LL | fn get_min_from_max<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<&'min G>(); //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-contravariant-self-trait-match.rs:32:5
-   |
-LL | fn get_max_from_min<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<&'max G>(); //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/variance/variance-covariant-arg-object.nll.stderr b/src/test/ui/variance/variance-covariant-arg-object.nll.stderr
deleted file mode 100644
index 26699a537e810..0000000000000
--- a/src/test/ui/variance/variance-covariant-arg-object.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-covariant-arg-object.rs:25:5
-   |
-LL | fn get_min_from_max<'min, 'max>(v: Box<Get<&'max i32>>)
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'min` must outlive `'max`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-covariant-arg-object.rs:32:5
-   |
-LL | fn get_max_from_min<'min, 'max, G>(v: Box<Get<&'min i32>>)
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'min` must outlive `'max`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/variance/variance-covariant-arg-trait-match.nll.stderr b/src/test/ui/variance/variance-covariant-arg-trait-match.nll.stderr
deleted file mode 100644
index bb3f5f5711cbf..0000000000000
--- a/src/test/ui/variance/variance-covariant-arg-trait-match.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-covariant-arg-trait-match.rs:24:5
-   |
-LL | fn get_min_from_max<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<G,&'min i32>() //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-covariant-arg-trait-match.rs:30:5
-   |
-LL | fn get_max_from_min<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<G,&'max i32>() //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/variance/variance-covariant-self-trait-match.nll.stderr b/src/test/ui/variance/variance-covariant-self-trait-match.nll.stderr
deleted file mode 100644
index 3bbf9c0d3f5df..0000000000000
--- a/src/test/ui/variance/variance-covariant-self-trait-match.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-covariant-self-trait-match.rs:24:5
-   |
-LL | fn get_min_from_max<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<&'min G>(); //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-covariant-self-trait-match.rs:30:5
-   |
-LL | fn get_max_from_min<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<&'max G>(); //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/variance/variance-invariant-arg-object.nll.stderr b/src/test/ui/variance/variance-invariant-arg-object.nll.stderr
deleted file mode 100644
index 20ab648598618..0000000000000
--- a/src/test/ui/variance/variance-invariant-arg-object.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-invariant-arg-object.rs:21:5
-   |
-LL | fn get_min_from_max<'min, 'max>(v: Box<Get<&'max i32>>)
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'min` must outlive `'max`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-invariant-arg-object.rs:28:5
-   |
-LL | fn get_max_from_min<'min, 'max, G>(v: Box<Get<&'min i32>>)
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'min` must outlive `'max`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/variance/variance-invariant-arg-trait-match.nll.stderr b/src/test/ui/variance/variance-invariant-arg-trait-match.nll.stderr
deleted file mode 100644
index be9f5a632dd6d..0000000000000
--- a/src/test/ui/variance/variance-invariant-arg-trait-match.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-invariant-arg-trait-match.rs:20:5
-   |
-LL | fn get_min_from_max<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<G,&'min i32>() //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-invariant-arg-trait-match.rs:26:5
-   |
-LL | fn get_max_from_min<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<G,&'max i32>() //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/variance/variance-invariant-self-trait-match.nll.stderr b/src/test/ui/variance/variance-invariant-self-trait-match.nll.stderr
deleted file mode 100644
index f5827856a1bdb..0000000000000
--- a/src/test/ui/variance/variance-invariant-self-trait-match.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-invariant-self-trait-match.rs:20:5
-   |
-LL | fn get_min_from_max<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<&'min G>(); //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-invariant-self-trait-match.rs:26:5
-   |
-LL | fn get_max_from_min<'min, 'max, G>()
-   |                     ----  ---- lifetime `'max` defined here
-   |                     |
-   |                     lifetime `'min` defined here
-...
-LL |     impls_get::<&'max G>(); //~ ERROR mismatched types
-   |     ^^^^^^^^^^^^^^^^^^^^^^ requires that `'min` must outlive `'max`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/variance/variance-trait-matching.nll.stderr b/src/test/ui/variance/variance-trait-matching.nll.stderr
deleted file mode 100644
index 14b42585d6e2a..0000000000000
--- a/src/test/ui/variance/variance-trait-matching.nll.stderr
+++ /dev/null
@@ -1,12 +0,0 @@
-error[E0621]: explicit lifetime required in the type of `get`
-  --> $DIR/variance-trait-matching.rs:34:5
-   |
-LL | fn get<'a, G>(get: &G) -> i32
-   |                    -- help: add explicit lifetime `'a` to the type of `get`: `&'a G`
-...
-LL |     pick(get, &22) //~ ERROR 34:5: 34:9: explicit lifetime required in the type of `get` [E0621]
-   |     ^^^^^^^^^^^^^^ lifetime `'a` required
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0621`.
diff --git a/src/test/ui/variance/variance-use-contravariant-struct-1.nll.stderr b/src/test/ui/variance/variance-use-contravariant-struct-1.nll.stderr
deleted file mode 100644
index 37604af506322..0000000000000
--- a/src/test/ui/variance/variance-use-contravariant-struct-1.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-use-contravariant-struct-1.rs:22:5
-   |
-LL | fn foo<'min,'max>(v: SomeStruct<&'max ()>)
-   |        ---- ---- lifetime `'max` defined here
-   |        |
-   |        lifetime `'min` defined here
-...
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'min` must outlive `'max`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/variance/variance-use-covariant-struct-1.nll.stderr b/src/test/ui/variance/variance-use-covariant-struct-1.nll.stderr
deleted file mode 100644
index c7fd60301c834..0000000000000
--- a/src/test/ui/variance/variance-use-covariant-struct-1.nll.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-use-covariant-struct-1.rs:20:5
-   |
-LL | fn foo<'min,'max>(v: SomeStruct<&'min ()>)
-   |        ---- ---- lifetime `'max` defined here
-   |        |
-   |        lifetime `'min` defined here
-...
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'min` must outlive `'max`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/variance/variance-use-invariant-struct-1.nll.stderr b/src/test/ui/variance/variance-use-invariant-struct-1.nll.stderr
deleted file mode 100644
index 1638d5ec4fb7a..0000000000000
--- a/src/test/ui/variance/variance-use-invariant-struct-1.nll.stderr
+++ /dev/null
@@ -1,24 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-use-invariant-struct-1.rs:22:5
-   |
-LL | fn foo<'min,'max>(v: SomeStruct<&'max ()>)
-   |        ---- ---- lifetime `'max` defined here
-   |        |
-   |        lifetime `'min` defined here
-...
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'min` must outlive `'max`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/variance-use-invariant-struct-1.rs:29:5
-   |
-LL | fn bar<'min,'max>(v: SomeStruct<&'min ()>)
-   |        ---- ---- lifetime `'max` defined here
-   |        |
-   |        lifetime `'min` defined here
-...
-LL |     v //~ ERROR mismatched types
-   |     ^ returning this value requires that `'min` must outlive `'max`
-
-error: aborting due to 2 previous errors
-
diff --git a/src/test/ui/wf/wf-static-method.nll.stderr b/src/test/ui/wf/wf-static-method.nll.stderr
deleted file mode 100644
index bfcb16c654ff1..0000000000000
--- a/src/test/ui/wf/wf-static-method.nll.stderr
+++ /dev/null
@@ -1,55 +0,0 @@
-error: unsatisfied lifetime constraints
-  --> $DIR/wf-static-method.rs:27:9
-   |
-LL | impl<'a, 'b> Foo<'a, 'b, Evil<'a, 'b>> for () {
-   |      --  -- lifetime `'b` defined here
-   |      |
-   |      lifetime `'a` defined here
-...
-LL |         u //~ ERROR E0312
-   |         ^ returning this value requires that `'b` must outlive `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/wf-static-method.rs:36:18
-   |
-LL | impl<'a, 'b> Foo<'a, 'b, ()> for IndirectEvil<'a, 'b> {
-   |      --  -- lifetime `'b` defined here
-   |      |
-   |      lifetime `'a` defined here
-...
-LL |         let me = Self::make_me(); //~ ERROR lifetime bound not satisfied
-   |                  ^^^^^^^^^^^^^^^ requires that `'b` must outlive `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/wf-static-method.rs:43:9
-   |
-LL | impl<'a, 'b> Evil<'a, 'b> {
-   |      --  -- lifetime `'b` defined here
-   |      |
-   |      lifetime `'a` defined here
-LL |     fn inherent_evil(u: &'b u32) -> &'a u32 {
-LL |         u //~ ERROR E0312
-   |         ^ returning this value requires that `'b` must outlive `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/wf-static-method.rs:51:5
-   |
-LL | fn evil<'a, 'b>(b: &'b u32) -> &'a u32 {
-   |         --  -- lifetime `'b` defined here
-   |         |
-   |         lifetime `'a` defined here
-LL |     <()>::static_evil(b) //~ ERROR cannot infer an appropriate lifetime
-   |     ^^^^^^^^^^^^^^^^^^^^ returning this value requires that `'b` must outlive `'a`
-
-error: unsatisfied lifetime constraints
-  --> $DIR/wf-static-method.rs:55:5
-   |
-LL | fn indirect_evil<'a, 'b>(b: &'b u32) -> &'a u32 {
-   |                  --  -- lifetime `'b` defined here
-   |                  |
-   |                  lifetime `'a` defined here
-LL |     <IndirectEvil>::static_evil(b)
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ returning this value requires that `'b` must outlive `'a`
-
-error: aborting due to 5 previous errors
-