Rollup merge of #142828 - Mark-Simulacrum:relnotes, r=Mark-Simulacrum

1.88.0 release notes

r? cuviper

Author: matthiaskrgr

RELEASES.md

@@ -1,3 +1,103 @@
+Version 1.88.0 (2025-06-26)
+==========================
+
+<a id="1.88.0-Language"></a>
+
+Language
+--------
+- [Stabilize `#![feature(let_chains)]` in the 2024 edition.](https://github.com/rust-lang/rust/pull/132833)
+  This feature allows `&&`-chaining `let` statements inside `if` and `while`, allowing intermixture with boolean expressions. The patterns inside the `let` sub-expressions can be irrefutable or refutable.
+- [Stabilize `#![feature(naked_functions)]`.](https://github.com/rust-lang/rust/pull/134213)
+  Naked functions allow writing functions with no compiler-generated epilogue and prologue, allowing full control over the generated assembly for a particular function.
+- [Stabilize `#![feature(cfg_boolean_literals)]`.](https://github.com/rust-lang/rust/pull/138632)
+  This allows using boolean literals as `cfg` predicates, e.g. `#[cfg(true)]` and `#[cfg(false)]`.
+- [Fully de-stabilize the `#[bench]` attribute](https://github.com/rust-lang/rust/pull/134273). Usage of `#[bench]` without `#![feature(custom_test_frameworks)]` already triggered a deny-by-default future-incompatibility lint since Rust 1.77, but will now become a hard error.
+- [Add warn-by-default `dangerous_implicit_autorefs` lint against implicit autoref of raw pointer dereference.](https://github.com/rust-lang/rust/pull/123239)
+  The lint [will be bumped to deny-by-default](https://github.com/rust-lang/rust/pull/141661) in the next version of Rust.
+- [Add `invalid_null_arguments` lint to prevent invalid usage of null pointers.](https://github.com/rust-lang/rust/pull/119220)
+  This lint is uplifted from `clippy::invalid_null_ptr_usage`.
+- [Change trait impl candidate preference for builtin impls and trivial where-clauses.](https://github.com/rust-lang/rust/pull/138176)
+- [Check types of generic const parameter defaults](https://github.com/rust-lang/rust/pull/139646)
+
+<a id="1.88.0-Compiler"></a>
+
+Compiler
+--------
+- [Stabilize `-Cdwarf-version` for selecting the version of DWARF debug information to generate.](https://github.com/rust-lang/rust/pull/136926)
+
+
+<a id="1.88.0-Platform-Support"></a>
+
+Platform Support
+----------------
+- [Demote `i686-pc-windows-gnu` to Tier 2.](https://blog.rust-lang.org/2025/05/26/demoting-i686-pc-windows-gnu/)
+
+
+Refer to Rust's [platform support page][platform-support-doc]
+for more information on Rust's tiered platform support.
+
+[platform-support-doc]: https://doc.rust-lang.org/rustc/platform-support.html
+
+<a id="1.88.0-Libraries"></a>
+
+Libraries
+---------
+- [Remove backticks from `#[should_panic]` test failure message.](https://github.com/rust-lang/rust/pull/136160)
+- [Guarantee that `[T; N]::from_fn` is generated in order of increasing indices.](https://github.com/rust-lang/rust/pull/139099), for those passing it a stateful closure.
+- [The libtest flag `--nocapture` is deprecated in favor of the more consistent `--no-capture` flag.](https://github.com/rust-lang/rust/pull/139224)
+- [Guarantee that `{float}::NAN` is a quiet NaN.](https://github.com/rust-lang/rust/pull/139483)
+
+
+<a id="1.88.0-Stabilized-APIs"></a>
+
+Stabilized APIs
+---------------
+
+- [`Cell::update`](https://doc.rust-lang.org/stable/std/cell/struct.Cell.html#method.update)
+- [`impl Default for *const T`](https://doc.rust-lang.org/nightly/std/primitive.pointer.html#impl-Default-for-*const+T)
+- [`impl Default for *mut T`](https://doc.rust-lang.org/nightly/std/primitive.pointer.html#impl-Default-for-*mut+T)
+- [`HashMap::extract_if`](https://doc.rust-lang.org/stable/std/collections/struct.HashMap.html#method.extract_if)
+- [`HashSet::extract_if`](https://doc.rust-lang.org/stable/std/collections/struct.HashSet.html#method.extract_if)
+- [`proc_macro::Span::line`](https://doc.rust-lang.org/stable/proc_macro/struct.Span.html#method.line)
+- [`proc_macro::Span::column`](https://doc.rust-lang.org/stable/proc_macro/struct.Span.html#method.column)
+- [`proc_macro::Span::start`](https://doc.rust-lang.org/stable/proc_macro/struct.Span.html#method.start)
+- [`proc_macro::Span::end`](https://doc.rust-lang.org/stable/proc_macro/struct.Span.html#method.end)
+- [`proc_macro::Span::file`](https://doc.rust-lang.org/stable/proc_macro/struct.Span.html#method.file)
+- [`proc_macro::Span::local_file`](https://doc.rust-lang.org/stable/proc_macro/struct.Span.html#method.local_file)
+
+These previously stable APIs are now stable in const contexts:
+
+- [`NonNull<T>::replace`](https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.replace)
+- [`<*mut T>::replace`](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.replace)
+- [`std::ptr::swap_nonoverlapping`](https://github.com/rust-lang/rust/pull/137280)
+- [`Cell::{replace, get, get_mut, from_mut, as_slice_of_cells}`](https://github.com/rust-lang/rust/pull/137928)
+
+
+<a id="1.88.0-Cargo"></a>
+
+Cargo
+-----
+- [Stabilize automatic garbage collection.](https://github.com/rust-lang/cargo/pull/14287/)
+- [use `zlib-rs` for gzip compression in rust code](https://github.com/rust-lang/cargo/pull/15417/)
+
+<a id="1.88.0-Rustdoc"></a>
+
+Rustdoc
+-----
+- [Doctests can be ignored based on target names using `ignore-*` attributes.](https://github.com/rust-lang/rust/pull/137096)
+- [Stabilize the `--test-runtool` and `--test-runtool-arg` CLI options to specify a program (like qemu) and its arguments to run a doctest.](https://github.com/rust-lang/rust/pull/137096)
+
+<a id="1.88.0-Compatibility-Notes"></a>
+
+Compatibility Notes
+-------------------
+- [Finish changing the internal representation of pasted tokens](https://github.com/rust-lang/rust/pull/124141). Certain invalid declarative macros that were previously accepted in obscure circumstances are now correctly rejected by the compiler. Use of a `tt` fragment specifier can often fix these macros.
+- [Fully de-stabilize the `#[bench]` attribute](https://github.com/rust-lang/rust/pull/134273). Usage of `#[bench]` without `#![feature(custom_test_frameworks)]` already triggered a deny-by-default future-incompatibility lint since Rust 1.77, but will now become a hard error.
+- [Fix borrow checking some always-true patterns.](https://github.com/rust-lang/rust/pull/139042)
+  The borrow checker was overly permissive in some cases, allowing programs that shouldn't have compiled.
+- [Update the minimum external LLVM to 19.](https://github.com/rust-lang/rust/pull/139275)
+- [Make it a hard error to use a vector type with a non-Rust ABI without enabling the required target feature.](https://github.com/rust-lang/rust/pull/139309)
+
 Version 1.87.0 (2025-05-15)
 ==========================