Unrolled build for rust-lang#130764

Rollup merge of rust-lang#130764 - compiler-errors:inherent, r=estebank

Separate collection of crate-local inherent impls from error tracking

rust-lang#119895 changed the return type of the `crate_inherent_impls` query from `CrateInherentImpls` to `Result<CrateInherentImpls, ErrorGuaranteed>` to avoid needing to use the non-parallel-friendly `track_errors()` to track if an error was reporting from within the query... This was mostly fine until rust-lang#121113, which stopped halting compilation when we hit an `Err(ErrorGuaranteed)` in the `crate_inherent_impls` query.

Thus we proceed onwards to typeck, and since a return type of `Result<CrateInherentImpls, ErrorGuaranteed>` means that the query can *either* return one of "the list inherent impls" or "error has been reported", later on when we want to assemble method or associated item candidates for inherent impls, we were just treating any `Err(ErrorGuaranteed)` return value as if Rust had no inherent impls defined anywhere at all! This leads to basically every inherent method call failing with an error, lol, which was reported in rust-lang#127798.

This PR changes the `crate_inherent_impls` query to return `(CrateInherentImpls, Result<(), ErrorGuaranteed>)`, i.e. returning the inherent impls collected *and* whether an error was reported in the query itself. It firewalls the latter part of that query into a new `crate_inherent_impls_validity_check` just for the `ensure()` call.

This fixes rust-lang#127798.

Author: rust-timer

compiler/rustc_hir_analysis/src/coherence/inherent_impls.rs

@@ -22,36 +22,38 @@ use crate::errors;
 pub(crate) fn crate_inherent_impls(
     tcx: TyCtxt<'_>,
     (): (),
-) -> Result<&'_ CrateInherentImpls, ErrorGuaranteed> {
+) -> (&'_ CrateInherentImpls, Result<(), ErrorGuaranteed>) {
     let mut collect = InherentCollect { tcx, impls_map: Default::default() };
+
     let mut res = Ok(());
     for id in tcx.hir().items() {
         res = res.and(collect.check_item(id));
     }
-    res?;
-    Ok(tcx.arena.alloc(collect.impls_map))
+
+    (tcx.arena.alloc(collect.impls_map), res)
 }
 
-pub(crate) fn crate_incoherent_impls(
+pub(crate) fn crate_inherent_impls_validity_check(
     tcx: TyCtxt<'_>,
-    simp: SimplifiedType,
-) -> Result<&[DefId], ErrorGuaranteed> {
-    let crate_map = tcx.crate_inherent_impls(())?;
-    Ok(tcx.arena.alloc_from_iter(
+    (): (),
+) -> Result<(), ErrorGuaranteed> {
+    tcx.crate_inherent_impls(()).1
+}
+
+pub(crate) fn crate_incoherent_impls(tcx: TyCtxt<'_>, simp: SimplifiedType) -> &[DefId] {
+    let (crate_map, _) = tcx.crate_inherent_impls(());
+    tcx.arena.alloc_from_iter(
         crate_map.incoherent_impls.get(&simp).unwrap_or(&Vec::new()).iter().map(|d| d.to_def_id()),
-    ))
+    )
 }
 
 /// On-demand query: yields a vector of the inherent impls for a specific type.
-pub(crate) fn inherent_impls(
-    tcx: TyCtxt<'_>,
-    ty_def_id: LocalDefId,
-) -> Result<&[DefId], ErrorGuaranteed> {
-    let crate_map = tcx.crate_inherent_impls(())?;
-    Ok(match crate_map.inherent_impls.get(&ty_def_id) {
+pub(crate) fn inherent_impls(tcx: TyCtxt<'_>, ty_def_id: LocalDefId) -> &[DefId] {
+    let (crate_map, _) = tcx.crate_inherent_impls(());
+    match crate_map.inherent_impls.get(&ty_def_id) {
         Some(v) => &v[..],
         None => &[],
-    })
+    }
 }
 
 struct InherentCollect<'tcx> {

compiler/rustc_hir_analysis/src/coherence/inherent_impls_overlap.rs

@@ -177,8 +177,7 @@ impl<'tcx> InherentOverlapChecker<'tcx> {
             return Ok(());
         }
 
-        let impls = self.tcx.inherent_impls(id.owner_id)?;
-
+        let impls = self.tcx.inherent_impls(id.owner_id);
         let overlap_mode = OverlapMode::get(self.tcx, id.owner_id.to_def_id());
 
         let impls_items = impls

compiler/rustc_hir_analysis/src/coherence/mod.rs

@@ -124,7 +124,10 @@ fn enforce_empty_impls_for_marker_traits(
 
 pub(crate) fn provide(providers: &mut Providers) {
     use self::builtin::coerce_unsized_info;
-    use self::inherent_impls::{crate_incoherent_impls, crate_inherent_impls, inherent_impls};
+    use self::inherent_impls::{
+        crate_incoherent_impls, crate_inherent_impls, crate_inherent_impls_validity_check,
+        inherent_impls,
+    };
     use self::inherent_impls_overlap::crate_inherent_impls_overlap_check;
     use self::orphan::orphan_check_impl;
 
@@ -133,6 +136,7 @@ pub(crate) fn provide(providers: &mut Providers) {
         crate_inherent_impls,
         crate_incoherent_impls,
         inherent_impls,
+        crate_inherent_impls_validity_check,
         crate_inherent_impls_overlap_check,
         coerce_unsized_info,
         orphan_check_impl,

compiler/rustc_hir_analysis/src/hir_ty_lowering/errors.rs

@@ -1028,7 +1028,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
                 ..
             }) = node
             && let Some(ty_def_id) = qself_ty.ty_def_id()
-            && let Ok([inherent_impl]) = tcx.inherent_impls(ty_def_id)
+            && let [inherent_impl] = tcx.inherent_impls(ty_def_id)
             && let name = format!("{ident2}_{ident3}")
             && let Some(ty::AssocItem { kind: ty::AssocKind::Fn, .. }) = tcx
                 .associated_items(inherent_impl)

compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs

@@ -1272,7 +1272,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
         }
 
         let candidates: Vec<_> = tcx
-            .inherent_impls(adt_did)?
+            .inherent_impls(adt_did)
             .iter()
             .filter_map(|&impl_| {
                 let (item, scope) =

compiler/rustc_hir_analysis/src/lib.rs

@@ -170,7 +170,7 @@ pub fn check_crate(tcx: TyCtxt<'_>) {
             let _ = tcx.ensure().coherent_trait(trait_def_id);
         }
         // these queries are executed for side-effects (error reporting):
-        let _ = tcx.ensure().crate_inherent_impls(());
+        let _ = tcx.ensure().crate_inherent_impls_validity_check(());
         let _ = tcx.ensure().crate_inherent_impls_overlap_check(());
     });
 

compiler/rustc_hir_typeck/src/expr.rs

@@ -2126,7 +2126,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 .tcx
                 .inherent_impls(def_id)
                 .into_iter()
-                .flatten()
                 .flat_map(|i| self.tcx.associated_items(i).in_definition_order())
                 // Only assoc fn with no receivers.
                 .filter(|item| {

compiler/rustc_hir_typeck/src/method/probe.rs

@@ -728,13 +728,13 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
         let Some(simp) = simplify_type(self.tcx, self_ty, TreatParams::InstantiateWithInfer) else {
             bug!("unexpected incoherent type: {:?}", self_ty)
         };
-        for &impl_def_id in self.tcx.incoherent_impls(simp).into_iter().flatten() {
+        for &impl_def_id in self.tcx.incoherent_impls(simp).into_iter() {
             self.assemble_inherent_impl_probe(impl_def_id);
         }
     }
 
     fn assemble_inherent_impl_candidates_for_type(&mut self, def_id: DefId) {
-        let impl_def_ids = self.tcx.at(self.span).inherent_impls(def_id).into_iter().flatten();
+        let impl_def_ids = self.tcx.at(self.span).inherent_impls(def_id).into_iter();
         for &impl_def_id in impl_def_ids {
             self.assemble_inherent_impl_probe(impl_def_id);
         }

compiler/rustc_hir_typeck/src/method/suggest.rs

@@ -680,7 +680,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                         self.tcx
                             .inherent_impls(adt_def.did())
                             .into_iter()
-                            .flatten()
                             .any(|def_id| self.associated_value(*def_id, item_name).is_some())
                     } else {
                         false
@@ -1438,7 +1437,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                         .tcx
                         .inherent_impls(adt.did())
                         .into_iter()
-                        .flatten()
                         .copied()
                         .filter(|def_id| {
                             if let Some(assoc) = self.associated_value(*def_id, item_name) {
@@ -1900,7 +1898,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         call_args: Option<Vec<Ty<'tcx>>>,
     ) -> Option<Symbol> {
         if let ty::Adt(adt, adt_args) = rcvr_ty.kind() {
-            for inherent_impl_did in self.tcx.inherent_impls(adt.did()).into_iter().flatten() {
+            for inherent_impl_did in self.tcx.inherent_impls(adt.did()).into_iter() {
                 for inherent_method in
                     self.tcx.associated_items(inherent_impl_did).in_definition_order()
                 {
@@ -2114,9 +2112,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         let ty::Adt(adt_def, _) = rcvr_ty.kind() else {
             return;
         };
-        // FIXME(oli-obk): try out bubbling this error up one level and cancelling the other error in that case.
-        let Ok(impls) = self.tcx.inherent_impls(adt_def.did()) else { return };
-        let mut items = impls
+        let mut items = self
+            .tcx
+            .inherent_impls(adt_def.did())
             .iter()
             .flat_map(|i| self.tcx.associated_items(i).in_definition_order())
             // Only assoc fn with no receivers and only if
@@ -2495,7 +2493,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 .and_then(|simp| {
                     tcx.incoherent_impls(simp)
                         .into_iter()
-                        .flatten()
                         .find_map(|&id| self.associated_value(id, item_name))
                 })
                 .is_some()

compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs

@@ -347,7 +347,7 @@ provide! { tcx, def_id, other, cdata,
         tcx.arena.alloc_from_iter(cdata.get_associated_item_or_field_def_ids(def_id.index))
     }
     associated_item => { cdata.get_associated_item(def_id.index, tcx.sess) }
-    inherent_impls => { Ok(cdata.get_inherent_implementations_for_type(tcx, def_id.index)) }
+    inherent_impls => { cdata.get_inherent_implementations_for_type(tcx, def_id.index) }
     item_attrs => { tcx.arena.alloc_from_iter(cdata.get_item_attrs(def_id.index, tcx.sess)) }
     is_mir_available => { cdata.is_item_mir_available(def_id.index) }
     is_ctfe_mir_available => { cdata.is_ctfe_mir_available(def_id.index) }
@@ -393,7 +393,7 @@ provide! { tcx, def_id, other, cdata,
     traits => { tcx.arena.alloc_from_iter(cdata.get_traits()) }
     trait_impls_in_crate => { tcx.arena.alloc_from_iter(cdata.get_trait_impls()) }
     implementations_of_trait => { cdata.get_implementations_of_trait(tcx, other) }
-    crate_incoherent_impls => { Ok(cdata.get_incoherent_impls(tcx, other)) }
+    crate_incoherent_impls => { cdata.get_incoherent_impls(tcx, other) }
 
     dep_kind => { cdata.dep_kind }
     module_children => {