From 5fef4621c3fd3a2b460dbacd35fbef52537d8889 Mon Sep 17 00:00:00 2001 From: Mark Rousskov Date: Tue, 1 Oct 2024 21:04:22 -0700 Subject: [PATCH] Add 1.82 release notes --- RELEASES.md | 97 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 97 insertions(+) diff --git a/RELEASES.md b/RELEASES.md index b49470c3075..b9d58d6b757 100644 --- a/RELEASES.md +++ b/RELEASES.md @@ -1,3 +1,100 @@ +Version 1.82.0 (2024-10-17) +========================== + + + +Language +-------- +- [Don't make statement nonterminals match pattern nonterminals](https://github.com/rust-lang/rust/pull/120221/) +- [Implement lint against ambiguous negative literals](https://github.com/rust-lang/rust/pull/121364/) +- [Patterns matching empty types can now be omitted in common cases](https://github.com/rust-lang/rust/pull/122792) +- [size_of_val_raw: for length 0 this is safe to call](https://github.com/rust-lang/rust/pull/126152/) +- [Reorder trait bound modifiers *after* `for<...>` binder in trait bounds](https://github.com/rust-lang/rust/pull/127054/) +- [Stabilize opaque type precise capturing (RFC 3617)](https://github.com/rust-lang/rust/pull/127672) +- [Stabilize explicit opt-in to unsafe attributes](https://github.com/rust-lang/rust/pull/128771) + + + + +Compiler +-------- +- [Promote riscv64gc-unknown-linux-musl to tier 2](https://github.com/rust-lang/rust/pull/122049) +- [Improved diagnostics to explain why a pattern is unreachable](https://github.com/rust-lang/rust/pull/128034) +- [The compiler now triggers the unreachable code warning properly for async functions that don't return/are `-> !`](https://github.com/rust-lang/rust/pull/128443) +- [Promote `wasm32-wasip2` to Tier 2.](https://github.com/rust-lang/rust/pull/126967/) + + + + +Libraries +--------- +- [Implement DoubleEnded and ExactSize for Take and Take](https://github.com/rust-lang/rust/pull/106943/) +- [Stabilize Wasm relaxed SIMD](https://github.com/rust-lang/rust/pull/117468/) +- [Stabilize const `{integer}::from_str_radix` i.e. `const_int_from_str`](https://github.com/rust-lang/rust/pull/124941/) +- [CommandExt::before_exec: deprecate safety in edition 2024](https://github.com/rust-lang/rust/pull/125970/) +- [CloneToUninit impls](https://github.com/rust-lang/rust/pull/126877/) +- [impl `Default` for collection iterators that don't already have it](https://github.com/rust-lang/rust/pull/128261/) + + + + +Stabilized APIs +--------------- + + + +Cargo +----- +- [feat: Add `info` cargo subcommand](https://github.com/rust-lang/cargo/pull/14141/) + + + +Compatibility Notes +------------------- +- [`addr_of(_mut)!` macros and the newly stabilized `&raw (const|mut)` are now safe to use with all static items](https://github.com/rust-lang/rust/pull/125834) + - We now [disallow setting some built-in cfgs via the command-line](https://github.com/rust-lang/rust/pull/126158) with the newly added [`explicit_builtin_cfgs_in_flags`](https://doc.rust-lang.org/rustc/lints/listing/deny-by-default.html#explicit-builtin-cfgs-in-flags) lint in order to prevent incoherent state, eg. `windows` cfg active but target is Linux based. The appropriate [`rustc` flag](https://doc.rust-lang.org/rustc/command-line-arguments.html) should be used instead. +- [Stabilize `&raw const` and `&raw mut` operators (RFC 2582)](https://github.com/rust-lang/rust/pull/127679) +- [Stabilize unsafe extern blocks (RFC 3484)](https://github.com/rust-lang/rust/pull/127921) +- The standard library has a new implementation of `binary_search` which is significantly improves performance (#128254). However when a sorted slice has multiple values which compare equal, the new implementation may select a different value among the equal ones than the old implementation. +- [illumos/Solaris now sets `MSG_NOSIGNAL` when writing to sockets](https://github.com/rust-lang/rust/pull/128259). This avoids killing the process with SIGPIPE when writing to a closed socket, which matches the existing behavior on other UNIX targets. +- [Stabilize offset_of_nested](https://github.com/rust-lang/rust/pull/128284) +- [Removes a problematic hack that always passed the --whole-archive linker flag for tests, which may cause linker errors for code accidentally relying on it.](https://github.com/rust-lang/rust/pull/128400) +- The WebAssembly target features `multivalue` and `reference-types` are now + both enabled by default. These two features both have subtle changes implied + for generated WebAssembly binaries. For the `multivalue` feature, WebAssembly + target support has changed when upgrading to LLVM 19. Support for generating + functions with multiple returns no longer works and + `-Ctarget-feature=+multivalue` has a different meaning than it did in LLVM 18 + and prior. There is no longer any supported means to generate a module that has + a function with multiple returns in WebAssembly from Rust source code. For the + `reference-types` feature the encoding of immediates in the `call_indirect`, a + commonly used instruction by the WebAssembly backend, has changed. Validators + and parsers which don't understand the `reference-types` proposal will no + longer accept modules produced by LLVM due to this change in encoding of + immediates. Additionally these features being enabled are encoded in the + `target_features` custom section and may affect downstream tooling such as + `wasm-opt` consuming the module. Generating a WebAssembly module that disables + default features requires `-Zbuild-std` support from Cargo and more information + can be found at + [rust-lang/rust#128511](https://github.com/rust-lang/rust/pull/128511). +- [Stabilize `const` arguments to inline asm](https://github.com/rust-lang/rust/pull/128570) +- [Promote aarch64-apple-darwin to Tier 1](https://github.com/rust-lang/rust/pull/128592) +- [stabilize floating-point arithmetic in `const fn`](https://github.com/rust-lang/rust/pull/128596) +- [float types: document NaN bit pattern guarantees](https://github.com/rust-lang/rust/pull/129559) +- [Rust now raises unsafety errors for union patterns in parameter-position](https://github.com/rust-lang/rust/pull/130531) + + + + +Internal Changes +---------------- + +These changes do not affect any public interfaces of Rust, but they represent +significant improvements to the performance or internals of rustc and related +tools. + +- [Update to LLVM 19](https://github.com/rust-lang/rust/pull/127513) + Version 1.81.0 (2024-09-05) ==========================