diff --git a/RELEASES.md b/RELEASES.md index 3c72cb1de0a3f..8a6bb214d2d52 100644 --- a/RELEASES.md +++ b/RELEASES.md @@ -1,3 +1,103 @@ +Version 1.88.0 (2025-06-26) +========================== + + + +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) + + + +Compiler +-------- +- [Stabilize `-Cdwarf-version` for selecting the version of DWARF debug information to generate.](https://github.com/rust-lang/rust/pull/136926) + + + + +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 + + + +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) + + + + +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::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) + + + + +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/) + + + +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) + + + +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) ==========================