| 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 |
| Rust 1.85.1 Mar 18, 2025 |
Language: Stabilize &mut, *mut, &Cell, and *const Cell in const. Allow creating references to statics in const initializers. Implement raw lifetimes and labels ('r#ident). Define behavior when atomic and non-atomic reads race. Non-exhaustive structs may now be empty. Disallow implicit coercions from places of type ! const extern functions can now be defined for other calling conventions. Stabilize expr_2021 macro fragment specifier in all editions. The non_local_definitions lint now fires on less code and warns by default. Compiler: Deprecate unsound -Csoft-float flag. Add many new tier 3 targets: aarch64_unknown_nto_qnx700 arm64e-apple-tvos armv7-rtems-eabihf loongarch64-unknown-linux-ohos riscv32-wrs-vxworks and riscv64-wrs-vxworks riscv32{e|em|emc}-unknown-none-elf x86_64-unknown-hurd-gnu x86_64-unknown-trusty Refer to Rust's platform support page for more information on Rust's tiered platform support. Libraries: Implement PartialEq for ExitCode. Document that catch_unwind can deal with foreign exceptions without UB, although the exact behavior is unspecified. Implement Default for HashMap/HashSet iterators that don't already have it. Bump Unicode to version 16.0.0. Change documentation of ptr::add/sub to not claim equivalence with offset.. Stabilized APIs: BufRead::skip_until ControlFlow::break_value ControlFlow::continue_value ControlFlow::map_break ControlFlow::map_continue DebugList::finish_non_exhaustive DebugMap::finish_non_exhaustive DebugSet::finish_non_exhaustive DebugTuple::finish_non_exhaustive ErrorKind::ArgumentListTooLong ErrorKind::Deadlock ErrorKind::DirectoryNotEmpty ErrorKind::ExecutableFileBusy ErrorKind::FileTooLarge ErrorKind::HostUnreachable ErrorKind::IsADirectory ErrorKind::NetworkDown ErrorKind::NetworkUnreachable ErrorKind::NotADirectory ErrorKind::NotSeekable ErrorKind::ReadOnlyFilesystem ErrorKind::ResourceBusy ErrorKind::StaleNetworkFileHandle ErrorKind::StorageFull ErrorKind::TooManyLinks Option::get_or_insert_default Waker::data Wak |
| Rust 1.85.0 Feb 20, 2025 |
Language: Stabilize &mut, *mut, &Cell, and *const Cell in const. Allow creating references to statics in const initializers. Implement raw lifetimes and labels ('r#ident). Define behavior when atomic and non-atomic reads race. Non-exhaustive structs may now be empty. Disallow implicit coercions from places of type ! const extern functions can now be defined for other calling conventions. Stabilize expr_2021 macro fragment specifier in all editions. The non_local_definitions lint now fires on less code and warns by default. Compiler: Deprecate unsound -Csoft-float flag. Add many new tier 3 targets: aarch64_unknown_nto_qnx700 arm64e-apple-tvos armv7-rtems-eabihf loongarch64-unknown-linux-ohos riscv32-wrs-vxworks and riscv64-wrs-vxworks riscv32{e|em|emc}-unknown-none-elf x86_64-unknown-hurd-gnu x86_64-unknown-trusty Refer to Rust's platform support page for more information on Rust's tiered platform support. Libraries: Implement PartialEq for ExitCode. Document that catch_unwind can deal with foreign exceptions without UB, although the exact behavior is unspecified. Implement Default for HashMap/HashSet iterators that don't already have it. Bump Unicode to version 16.0.0. Change documentation of ptr::add/sub to not claim equivalence with offset.. Stabilized APIs: BufRead::skip_until ControlFlow::break_value ControlFlow::continue_value ControlFlow::map_break ControlFlow::map_continue DebugList::finish_non_exhaustive DebugMap::finish_non_exhaustive DebugSet::finish_non_exhaustive DebugTuple::finish_non_exhaustive ErrorKind::ArgumentListTooLong ErrorKind::Deadlock ErrorKind::DirectoryNotEmpty ErrorKind::ExecutableFileBusy ErrorKind::FileTooLarge ErrorKind::HostUnreachable ErrorKind::IsADirectory ErrorKind::NetworkDown ErrorKind::NetworkUnreachable ErrorKind::NotADirectory ErrorKind::NotSeekable ErrorKind::ReadOnlyFilesystem ErrorKind::ResourceBusy ErrorKind::StaleNetworkFileHandle ErrorKind::StorageFull ErrorKind::TooManyLinks Option::get_or_insert_default Waker::data Wak |
| Rust 1.84.1 Jan 30, 2025 |
Language: Stabilize &mut, *mut, &Cell, and *const Cell in const. Allow creating references to statics in const initializers. Implement raw lifetimes and labels ('r#ident). Define behavior when atomic and non-atomic reads race. Non-exhaustive structs may now be empty. Disallow implicit coercions from places of type ! const extern functions can now be defined for other calling conventions. Stabilize expr_2021 macro fragment specifier in all editions. The non_local_definitions lint now fires on less code and warns by default. Compiler: Deprecate unsound -Csoft-float flag. Add many new tier 3 targets: aarch64_unknown_nto_qnx700 arm64e-apple-tvos armv7-rtems-eabihf loongarch64-unknown-linux-ohos riscv32-wrs-vxworks and riscv64-wrs-vxworks riscv32{e|em|emc}-unknown-none-elf x86_64-unknown-hurd-gnu x86_64-unknown-trusty Refer to Rust's platform support page for more information on Rust's tiered platform support. Libraries: Implement PartialEq for ExitCode. Document that catch_unwind can deal with foreign exceptions without UB, although the exact behavior is unspecified. Implement Default for HashMap/HashSet iterators that don't already have it. Bump Unicode to version 16.0.0. Change documentation of ptr::add/sub to not claim equivalence with offset.. Stabilized APIs: BufRead::skip_until ControlFlow::break_value ControlFlow::continue_value ControlFlow::map_break ControlFlow::map_continue DebugList::finish_non_exhaustive DebugMap::finish_non_exhaustive DebugSet::finish_non_exhaustive DebugTuple::finish_non_exhaustive ErrorKind::ArgumentListTooLong ErrorKind::Deadlock ErrorKind::DirectoryNotEmpty ErrorKind::ExecutableFileBusy ErrorKind::FileTooLarge ErrorKind::HostUnreachable ErrorKind::IsADirectory ErrorKind::NetworkDown ErrorKind::NetworkUnreachable ErrorKind::NotADirectory ErrorKind::NotSeekable ErrorKind::ReadOnlyFilesystem ErrorKind::ResourceBusy ErrorKind::StaleNetworkFileHandle ErrorKind::StorageFull ErrorKind::TooManyLinks Option::get_or_insert_default Waker::data Wak |
| Rust 1.83.0 Nov 28, 2024 |
Language: Stabilize &mut, *mut, &Cell, and *const Cell in const. Allow creating references to statics in const initializers. Implement raw lifetimes and labels ('r#ident). Define behavior when atomic and non-atomic reads race. Non-exhaustive structs may now be empty. Disallow implicit coercions from places of type ! const extern functions can now be defined for other calling conventions. Stabilize expr_2021 macro fragment specifier in all editions. The non_local_definitions lint now fires on less code and warns by default. Compiler: Deprecate unsound -Csoft-float flag. Add many new tier 3 targets: aarch64_unknown_nto_qnx700 arm64e-apple-tvos armv7-rtems-eabihf loongarch64-unknown-linux-ohos riscv32-wrs-vxworks and riscv64-wrs-vxworks riscv32{e|em|emc}-unknown-none-elf x86_64-unknown-hurd-gnu x86_64-unknown-trusty Refer to Rust's platform support page for more information on Rust's tiered platform support. Libraries: Implement PartialEq for ExitCode. Document that catch_unwind can deal with foreign exceptions without UB, although the exact behavior is unspecified. Implement Default for HashMap/HashSet iterators that don't already have it. Bump Unicode to version 16.0.0. Change documentation of ptr::add/sub to not claim equivalence with offset.. Stabilized APIs: BufRead::skip_until ControlFlow::break_value ControlFlow::continue_value ControlFlow::map_break ControlFlow::map_continue DebugList::finish_non_exhaustive DebugMap::finish_non_exhaustive DebugSet::finish_non_exhaustive DebugTuple::finish_non_exhaustive ErrorKind::ArgumentListTooLong ErrorKind::Deadlock ErrorKind::DirectoryNotEmpty ErrorKind::ExecutableFileBusy ErrorKind::FileTooLarge ErrorKind::HostUnreachable ErrorKind::IsADirectory ErrorKind::NetworkDown ErrorKind::NetworkUnreachable ErrorKind::NotADirectory ErrorKind::NotSeekable ErrorKind::ReadOnlyFilesystem ErrorKind::ResourceBusy ErrorKind::StaleNetworkFileHandle ErrorKind::StorageFull ErrorKind::TooManyLinks Option::get_or_insert_default Waker::data Wak |
| Rust 1.82.0 Oct 17, 2024 |
Language: Don't make statement nonterminals match pattern nonterminals Patterns matching empty types can now be omitted in common cases Enforce supertrait outlives obligations when using trait impls addr_of(_mut)! macros and the newly stabilized &raw (const|mut) are now safe to use with all static items size_of_val_raw: for length 0 this is safe to call Reorder trait bound modifiers after for<...> binder in trait bounds Stabilize opaque type precise capturing (RFC 3617) Stabilize &raw const and &raw mut operators (RFC 2582) Stabilize unsafe extern blocks (RFC 3484) Stabilize nested field access in offset_of! Do not require T to be live when dropping [T; 0] Stabilize const operands in inline assembly Stabilize floating-point arithmetic in const fn Stabilize explicit opt-in to unsafe attributes Document NaN bit patterns guarantees Compiler: Promote riscv64gc-unknown-linux-musl to tier 2 Promote Mac Catalyst targets aarch64-apple-ios-macabi and x86_64-apple-ios-macabi to Tier 2, and ship them with rustup Add tier 3 NuttX based targets for RISC-V and ARM Add tier 3 powerpc-unknown-linux-muslspe target Improved diagnostics to explain why a pattern is unreachable The compiler now triggers the unreachable code warning properly for async functions that don't return/are -> ! Promote aarch64-apple-darwin to Tier 1 Add Trusty OS target aarch64-unknown-trusty and armv7-unknown-trusty as tier 3 targets Promote wasm32-wasip2 to Tier 2. Libraries: Generalize {Rc,Arc}::make_mut() to Path, OsStr, and CStr. Stabilized APIs: std::thread::Builder::spawn_unchecked std::str::CharIndices::offset std::option::Option::is_none_or [T]::is_sorted [T]::is_sorted_by [T]::is_sorted_by_key Iterator::is_sorted Iterator::is_sorted_by Iterator::is_sorted_by_key std::future::Ready::into_inner std::iter::repeat_n impl<T: Clone> DoubleEndedIterator for Take<Repeat<T>> impl<T: Clone> ExactSizeIterator for Take<Repeat<T>> impl<T: Clone> ExactSizeIterator |
| Rust 1.81.0 Sep 5, 2024 |
Fix miscompilation in the jump threading MIR optimization when comparing floats Revert changes to the dead_code lint from 1.80.0 |
| Rust 1.80.1 Aug 8, 2024 |
Language: Document maximum allocation size Allow zero-byte offsets and ZST read/writes on arbitrary pointers Support C23's variadics without a named parameter Stabilize exclusive_range_pattern feature Guarantee layout and ABI of Result in some scenarios Compiler: Update cc crate to v1.0.97 allowing additional spectre mitigations on MSVC targets Allow field reordering on types marked repr(packed(1)) Add a lint against never type fallback affecting unsafe code Disallow cast with trailing braced macro in let-else Expand for_loops_over_fallibles lint to lint on fallibles behind references. self-contained linker: retry linking without -fuse-ld=lld on CCs that don't support it Do not parse CVarArgs (...) as a type in trait bounds Improvements to LLDB formatting #124458 #124500 For the wasm32-wasip2 target default to PIC and do not use -fuse-ld=lld Add x86_64-unknown-linux-none as a tier 3 target Lint on foo.into_iter() resolving to &Box<[T]>: IntoIterator Libraries: Add size_of and size_of_val and align_of and align_of_val to the prelude Abort a process when FD ownership is violated io::Write::write_fmt: panic if the formatter fails when the stream does not fail Panic if PathBuf::set_extension would add a path separator Add assert_unsafe_precondition to unchecked_{add,sub,neg,mul,shl,shr} methods Update c_char on AIX to use the correct type offset_of! no longer returns a temporary Handle sigma in str.to_lowercase correctly Raise DEFAULT_MIN_STACK_SIZE to at least 64KiB Stabilized APIs: impl Default for Rc<CStr> impl Default for Rc<str> impl Default for Rc<[T]> impl Default for Arc<str> impl Default for Arc<CStr> impl Default for Arc<[T]> impl IntoIterator for Box<[T]> impl FromIterator<String> for Box<str> impl FromIterator<char> for Box<str> LazyCell LazyLock Duration::div_duration_f32 Duration::div_duration_f64 Option::take_if Seek::seek_relative BinaryHeap::as_slice NonNull::offset NonNull::byte_of |
