| Version | Change log |
| Rust 1.88.0 Jun 27, 2025 |
Language: Stabilize #![feature(let_chains)] in the 2024 edition. 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)]. 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)]. This allows using boolean literals as cfg predicates, e.g. #[cfg(true)] and #[cfg(false)]. Fully de-stabilize the #[bench] attribute. 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. The lint will be bumped to deny-by-default in the next version of Rust. Add invalid_null_arguments lint to prevent invalid usage of null pointers. This lint is uplifted from clippy::invalid_null_ptr_usage. Change trait impl candidate preference for builtin impls and trivial where-clauses. Check types of generic const parameter defaults Compiler: Stabilize -Cdwarf-version for selecting the version of DWARF debug information to generate. Platform Support: Demote i686-pc-windows-gnu to Tier 2. Refer to Rust's platform support page for more information on Rust's tiered platform support. Libraries: Remove backticks from #[should_panic] test failure message. Guarantee that [T; N]::from_fn is generated in order of increasing indices., for those passing it a stateful closure. The libtest flag --nocapture is deprecated in favor of the more consistent --no-capture flag. Guarantee that {float}::NAN is a quiet NaN. Stabilized APIs: Cell::update impl Default for *const T impl Default for *mut T HashMap::extract_if HashSet::extract_if proc_macro::Span::line proc_macro::S |
| Rust 1.87.0 May 15, 2025 |
Language: Stabilize asm_goto feature Allow parsing open beginning ranges (..EXPR) after unary operators !, -, and *. Don't require method impls for methods with Self: Sized bounds in impls for unsized types Stabilize feature(precise_capturing_in_traits) allowing use<...> bounds on return position impl Trait in traits Compiler: x86: make SSE2 required for i686 targets and use it to pass SIMD types Platform Support: Remove i586-pc-windows-msvc target Refer to Rust's platform support page for more information on Rust's tiered platform support. Libraries: Stabilize the anonymous pipe API Add support for unbounded left/right shift operations Print pointer metadata in Debug impl of raw pointers Vec::with_capacity guarantees it allocates with the amount requested, even if Vec::capacity returns a different number. Most std::arch intrinsics which don't take pointer arguments can now be called from safe code if the caller has the appropriate target features already enabled (rust-lang/stdarch#1714, rust-lang/stdarch#1716, rust-lang/stdarch#1717) Undeprecate env::home_dir Denote ControlFlow as #[must_use] Macros such as assert_eq! and vec! now support const {...} expressions Stabilized APIs: Vec::extract_if vec::ExtractIf LinkedList::extract_if linked_list::ExtractIf <[T]>::split_off <[T]>::split_off_mut <[T]>::split_off_first <[T]>::split_off_first_mut <[T]>::split_off_last <[T]>::split_off_last_mut String::extend_from_within os_str::Display OsString::display OsStr::display io::pipe io::PipeReader io::PipeWriter impl From<PipeReader> for OwnedHandle impl From<PipeWriter> for OwnedHandle impl From<PipeReader> for Stdio impl From<PipeWriter> for Stdio impl From<PipeReader> for OwnedFd impl From<PipeWriter> for OwnedFd Box<MaybeUninit<T>>::write impl TryFrom<Vec<u8>> for String <*const T>::offset_from_unsigned <*const T>::byte_offset_from_unsigned <*mut T>::offs |
| Rust 1.86.0 Apr 13, 2025 |
Language: Stabilize upcasting trait objects to supertraits. Allow safe functions to be marked with the #[target_feature] attribute. The missing_abi lint now warns-by-default. Rust now lints about double negations, to catch cases that might have intended to be a prefix decrement operator (--x) as written in other languages. This was previously a clippy lint, clippy::double_neg, and is now available directly in Rust as double_negations. More pointers are now detected as definitely not-null based on their alignment in const eval. Empty repr() attribute applied to invalid items are now correctly rejected. Inner attributes #![test] and #![rustfmt::skip] are no longer accepted in more places than intended. Compiler: Debug-assert that raw pointers are non-null on access. Change -O to mean -C opt-level=3 instead of -C opt-level=2 to match Cargo's defaults. Fix emission of overflowing_literals under certain macro environments. Platform Support: Replace i686-unknown-redox target with i586-unknown-redox. Increase baseline CPU of i686-unknown-hurd-gnu to Pentium 4. New tier 3 targets: {aarch64-unknown,x86_64-pc}-nto-qnx710_iosock. For supporting Neutrino QNX 7.1 with io-socket network stack. {aarch64-unknown,x86_64-pc}-nto-qnx800. For supporting Neutrino QNX 8.0 (no_std-only). {x86_64,i686}-win7-windows-gnu. Intended for backwards compatibility with Windows 7. {x86_64,i686}-win7-windows-msvc are the Windows MSVC counterparts that already exist as Tier 3 targets. amdgcn-amd-amdhsa. x86_64-pc-cygwin. {mips,mipsel}-mti-none-elf. Initial bare-metal support. m68k-unknown-none-elf. armv7a-nuttx-{eabi,eabihf}, aarch64-unknown-nuttx, and thumbv7a-nuttx-{eabi,eabihf}. Refer to Rust's platform support page for more information on Rust's tiered platform support. Libraries: The type of FromBytesWithNulError in CStr::from_bytes_with_nul(bytes: &[u8]) -> Result<&Self, FromBytesWithNulError> was changed from an opaque struct to an enum, allowing users to examine why the conversion fa |
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