Rust Release Tracker
version.rs
Track Rust compiler releases, changelogs, and upcoming milestones.
Recent Releases
1.96.0
2026-05-28
1.96.0
2026-05-28
Version 1.96.0Beta
Merged PRs:
- Tracking issue for release notes of #152911: Stabilize
control_flow_ok(10d ago) - Set the Fuchsia ABI to the documented minimum (42d ago)
- implement
StructuralPartialEqforMaybeDangling(45d ago) - rustc: Stop passing
--allow-undefinedon wasm targets (48d ago) - rustdoc: seperate methods and associated functions in sidebar (50d ago)
- +20 more
1.95.0
2026-04-16
1.95.0
2026-04-16
- Stabilize
if letguards on match arms irrefutable_let_patternslint no longer lints on let chains- Support importing path-segment keywords with renaming
- Stabilize inline assembly for PowerPC and PowerPC64
- const-eval: be more consistent in the behavior of padding during typed copies
- Const blocks are no longer evaluated to determine if expressions involving fallible operations can implicitly be constant-promoted.. Expressions whose ability to implicitly be promoted would depend on the result of a const block are no longer implicitly promoted.
- Make operational semantics of pattern matching independent of crate and module
thread::scope: document how join interacts with TLS destructors- Speed up
str::containson aarch64 targets withneontarget feature enabled by default - [
MaybeUninit<[T; N]>: From<[MaybeUninit](https://doc.rust-lang.org/stable/std/mem/union.MaybeUninit.html#impl-From%3CMaybeUninit%3C%5BT;+N%5D%3E%3E-for-%5BMaybeUninit%3CT%3E;+N%5D); N]> - [
MaybeUninit<[T; N]>: AsRef<[MaybeUninit](https://doc.rust-lang.org/stable/std/mem/union.MaybeUninit.html#impl-AsRef%3C%5BMaybeUninit%3CT%3E;+N%5D%3E-for-MaybeUninit%3C%5BT;+N%5D%3E); N]> - [
MaybeUninit<[T; N]>: AsRef<[MaybeUninit](https://doc.rust-lang.org/stable/std/mem/union.MaybeUninit.html#impl-AsRef%3C%5BMaybeUninit%3CT%3E%5D%3E-for-MaybeUninit%3C%5BT;+N%5D%3E)]> - [
MaybeUninit<[T; N]>: AsMut<[MaybeUninit](https://doc.rust-lang.org/beta/std/mem/union.MaybeUninit.html#impl-AsMut%3C%5BMaybeUninit%3CT%3E;+N%5D%3E-for-MaybeUninit%3C%5BT;+N%5D%3E); N]> - [
MaybeUninit<[T; N]>: AsMut<[MaybeUninit](https://doc.rust-lang.org/stable/std/mem/union.MaybeUninit.html#impl-AsMut%3C%5BMaybeUninit%3CT%3E%5D%3E-for-MaybeUninit%3C%5BT;+N%5D%3E)]> - [
[MaybeUninit](https://doc.rust-lang.org/stable/std/mem/union.MaybeUninit.html#impl-From%3C%5BMaybeUninit%3CT%3E;+N%5D%3E-for-MaybeUninit%3C%5BT;+N%5D%3E); N]: From - [
Cell<[T; N]>: AsRef<[Cell](https://doc.rust-lang.org/stable/std/cell/struct.Cell.html#impl-AsRef%3C%5BCell%3CT%3E;+N%5D%3E-for-Cell%3C%5BT;+N%5D%3E); N]> - [
Cell<[T; N]>: AsRef<[Cell](https://doc.rust-lang.org/stable/std/cell/struct.Cell.html#impl-AsRef%3C%5BCell%3CT%3E%5D%3E-for-Cell%3C%5BT;+N%5D%3E)]> - [
Cell<[T]>: AsRef<[Cell](https://doc.rust-lang.org/stable/std/cell/struct.Cell.html#impl-AsRef%3C%5BCell%3CT%3E%5D%3E-for-Cell%3C%5BT%5D%3E)]> bool: TryFrom<{integer}>AtomicPtr::updateAtomicPtr::try_updateAtomicBool::updateAtomicBool::try_updateAtomicIn::updateAtomicIn::try_updateAtomicUn::updateAtomicUn::try_updatecfg_select!mod core::rangecore::range::RangeInclusivecore::range::RangeInclusiveItercore::hint::cold_path<*const T>::as_ref_unchecked<*mut T>::as_ref_unchecked<*mut T>::as_mut_uncheckedfmt::from_fnControlFlow::is_breakControlFlow::is_continue
- Array coercions may now result in less inference constraints than before
- Importing
$cratewithout renaming, i.e.use $crate::{self};, is now no longer permitted due to stricter error checking forselfimports. - const-eval: be more consistent in the behavior of padding during typed copies.
- A future-incompatibility warning lint
ambiguous_glob_imported_traitsis now reported when using an ambiguously glob imported trait - Check lifetime bounds of types mentioning only type parameters
- Report more visibility-related ambiguous import errors
- Deprecate
Eq::assert_receiver_is_total_eqand emit future compatibility warnings on manual impls - powerpc64: Use the ELF ABI version set in target spec instead of guessing (fixes the ELF ABI used by the OpenBSD target)
- Matching on a
#[non_exhaustive]enum now reads the discriminant, even if the enum has only one variant. This can cause closures to capture values that they previously wouldn't. mut refandmut ref mutpatterns, part of the unstable Match Ergonomics 2024 RFC, were accidentally allowed on stable within struct pattern field shorthand. These patterns are now correctly feature-gated as unstable in this position.- Add future-compatibility warning for derive helper attributes which conflict with built-in attributes
- JSON target specs have been destabilized and now require
-Z unstable-optionsto use. Previously, they could not be used without the standard library, which has no stable build mechanism. In preparation for thebuild-stdproject adding that support, JSON target specs are being proactively gated to ensure they remain unstable even ifbuild-stdis stabilized. Cargo now includes the-Z json-target-specCLI flag to automatically pass-Z unstable-optionsto the compiler when needed. See #150151, #151534, and rust-lang/cargo#16557. - [The arguments of
#[feature]attributes on invalid targets are now checked](https://github.com/rust-lang/rust/issues/153764)
- Promote
powerpc64-unknown-linux-muslto Tier 2 with host tools - Promote
aarch64-apple-tvosto Tier 2 - Promote
aarch64-apple-tvos-simto Tier 2 - Promote
aarch64-apple-watchosto Tier 2 - Promote
aarch64-apple-watchos-simto Tier 2 - Promote
aarch64-apple-visionosto Tier 2 - Promote
aarch64-apple-visionos-simto Tier 2 - In search results, rank unstable items lower
- Add new "hide deprecated items" setting in rustdoc
- Update to LLVM 22
1.94.1
2026-03-26
1.94.0
2026-03-05
1.94.0
2026-03-05
- Impls and impl items inherit
dead_codelint level of the corresponding traits and trait items - Stabilize additional 29 RISC-V target features including large portions of the RVA22U64 / RVA23U64 profiles
- Add warn-by-default
unused_visibilitieslint for visibility onconst _declarations - Update to Unicode 17
- Avoid incorrect lifetime errors for closures
- Relax
T: Ordbound for someBinaryHeapmethods. - [
<[T]>::array_windows](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.array_windows) - [
<[T]>::element_offset](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.element_offset) LazyCell::getLazyCell::get_mutLazyCell::force_mutLazyLock::getLazyLock::get_mutLazyLock::force_mutimpl TryFromfor usize std::iter::Peekable::next_if_mapstd::iter::Peekable::next_if_map_mut- x86
avx512fp16intrinsics - AArch64 NEON fp16 intrinsics
f32::consts::EULER_GAMMAf64::consts::EULER_GAMMAf32::consts::GOLDEN_RATIOf64::consts::GOLDEN_RATIOf32::mul_addf64::mul_add
- Stabilize the config include key. The top-level include config key allows loading additional config files, enabling better organization, sharing, and management of Cargo configurations across projects and environments. docs #16284
- Stabilize the pubtime field in registry index. This records when a crate version was published and enables time-based dependency resolution in the future. Note that crates.io will gradually backfill existing packages when a new version is published. Not all crates have pubtime yet. #16369 #16372
- Cargo now parses TOML v1.1 for manifests and configuration files. Note that using these features in Cargo.toml will raise your development MSRV, but the published manifest remains compatible with older parsers. #16415
- Make
CARGO_BIN_EXE_available at runtime
- Forbid freely casting lifetime bounds of
dyn-types - Make closure capturing have consistent and correct behaviour around patterns
- [Standard library macros are now imported via prelude, not via injected
#[macro_use]](https://github.com/rust-lang/rust/pull/139493) - Don't strip shebang in expression-context
include!(…)s - Ambiguous glob reexports are now also visible cross-crate
- Don't normalize where-clauses before checking well-formedness
- Introduce a future compatibility warning on codegen attributes on body-free trait methods
- On Windows
std::time::SystemTime::checked_sub_durationwill returnNonefor times before the Windows epoch (1/1/1601) - Lifetime identifiers such as
'aare now NFC normalized. - Overhaul filename handling for cross-compiler consistency
1.93.1
2026-02-12
1.93.1
2026-02-12
- Don't try to recover keyword as non-keyword identifier, fixing an ICE that especially affected rustfmt.
- Fix
clippy::panicking_unwrapfalse-positive on field access with implicit deref. - Revert "Update wasm-related dependencies in CI", fixing file descriptor leaks on the
wasm32-wasip2target.
1.93.0
2026-01-22
1.93.0
2026-01-22
- Stabilize several s390x
vector-related target features and theis_s390x_feature_detected!macro - Stabilize declaration of C-style variadic functions for the
systemABI - Emit error when using some keyword as a
cfgpredicate - Stabilize
asm_cfg - During const-evaluation, support copying pointers byte-by-byte
- LUB coercions now correctly handle function item types, and functions with differing safeties
- Allow
constitems that contain mutable references tostatic(which is very unsafe, but not always UB) - Add warn-by-default
const_item_interior_mutationslint to warn against calls which mutate interior mutableconstitems - Add warn-by-default
function_casts_as_integerlint
- Stabilize
-Cjump-tables=bool. The flag was previously called-Zno-jump-tables.
- Stop internally using
specializationon theCopytrait as it is unsound in the presence of lifetime dependentCopyimplementations. This may result in some performance regressions as some standard library APIs may now callClone::cloneinstead of performing bitwise copies - Allow the global allocator to use thread-local storage and
std::thread::current() - Make
BTree::appendnot update existing keys when appending an entry which already exists - Don't require
T: RefUnwindSafeforvec::IntoIter: UnwindSafe - [
<[MaybeUninit](https://doc.rust-lang.org/stable/core/primitive.slice.html#method.assume_init_drop)]>::assume_init_drop - [
<[MaybeUninit](https://doc.rust-lang.org/stable/core/primitive.slice.html#method.assume_init_ref)]>::assume_init_ref - [
<[MaybeUninit](https://doc.rust-lang.org/stable/core/primitive.slice.html#method.assume_init_mut)]>::assume_init_mut - [
<[MaybeUninit](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.write_copy_of_slice)]>::write_copy_of_slice - [
<[MaybeUninit](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.write_clone_of_slice)]>::write_clone_of_slice String::into_raw_partsVec::into_raw_parts::unchecked_neg ::unchecked_shl ::unchecked_shr ::unchecked_shl ::unchecked_shr - [
<[T]>::as_array](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.as_array) - [
<[T]>::as_mut_array](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.as_mut_array) - [
<*const [T]>::as_array](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.as_array) - [
<*mut [T]>::as_mut_array](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.as_mut_array) VecDeque::pop_front_ifVecDeque::pop_back_ifDuration::from_nanos_u128char::MAX_LEN_UTF8char::MAX_LEN_UTF16std::fmt::from_fnstd::fmt::FromFn
- Introduce
pin_v2into the builtin attributes namespace - Update bundled musl to 1.2.5
- On Emscripten, the unwinding ABI used when compiling with
panic=unwindwas changed from the JS exception handling ABI to the wasm exception handling ABI. If linking C/C++ object files with Rust objects,-fwasm-exceptionsmust be passed to the linker now. On nightly Rust, it is possible to get the old behavior with-Zwasm-emscripten-eh=false -Zbuild-std, but it will be removed in a future release. - The
#[test]attribute, used to define tests, was previously ignored in various places where it had no meaning (e.g on trait methods or types). Putting the#[test]attribute in these places is no longer ignored, and will now result in an error; this may also result in errors when generating rustdoc. Error whentestattribute is applied to structs - Cargo now sets the
CARGO_CFG_DEBUG_ASSERTIONSenvironment variable in more situations. This will cause crates depending onstatic-initversions 1.0.1 to 1.0.3 to fail compilation with "failed to resolve: use of unresolved module or unlinked crateparking_lot". See the linked issue for details. - User written types in the
offset_of!macro are now checked to be well formed. cargo publishno longer emits.cratefiles as a final artifact for user access when thebuild.build-dirconfig is unset- Upgrade the
deref_nullptrlint from warn-by-default to deny-by-default - Add future-incompatibility warning for
...function parameters without a pattern outside ofexternblocks - Introduce future-compatibility warning for
repr(C)enums whose discriminant values do not fit into ac_intorc_uint - Introduce future-compatibility warning against ignoring
repr(C)types as part ofrepr(transparent)
- Promote
riscv64a23-unknown-linux-gnuto Tier 2 (without host tools) - [Remove
#![doc(document_private_items)]](https://github.com/rust-lang/rust/pull/146495) - Include attribute and derive macros in search filters for "macros"
- Include extern crates in search filters for
import - Validate usage of crate-level doc attributes. This means if any of
html_favicon_url,html_logo_url,html_playground_url,issue_tracker_base_url, orhtml_no_sourceeither has a missing value, an unexpected value, or a value of the wrong type, rustdoc will emit the deny-by-default lintrustdoc::invalid_doc_attributes.
1.92.0
2025-12-11
1.92.0
2025-12-11
- Document
MaybeUninitrepresentation and validity - [Allow
&raw [mut | const]for union field in safe code](https://github.com/rust-lang/rust/pull/141469) - Prefer item bounds of associated types over where-bounds for auto-traits and
Sized - [Do not materialize
Xin[X; 0]whenXis unsizing a const](https://github.com/rust-lang/rust/pull/145277) - [Support combining
#[track_caller]and#[no_mangle](requires every declaration specifying#[track_caller]as well)](https://github.com/rust-lang/rust/pull/145724) - Make never type lints
never_type_fallback_flowing_into_unsafeanddependency_on_unit_never_type_fallbackdeny-by-default - Allow specifying multiple bounds for same associated item, except in trait objects
- Slightly strengthen higher-ranked region handling in coherence
- The
unused_must_uselint no longer warns onResult<(), Uninhabited>(for instance,Result<(), !>), orControlFlow. This avoids having to check for an error that can never happen.
- Specialize
Iterator::eq{_by}forTrustedLeniterators - Simplify
Extendfor tuples - Added details to
DebugforEncodeWide. iter::Repeat::lastandcountwill now panic, rather than looping infinitely.NonZeroLocation::file_as_c_strRwLockWriteGuard::downgradeBox::new_zeroedBox::new_zeroed_sliceRc::new_zeroedRc::new_zeroed_sliceArc::new_zeroedArc::new_zeroed_slicebtree_map::Entry::insert_entrybtree_map::VacantEntry::insert_entryimpl Extendimpl Extendimpl Extendimpl Extend- [
<[_]>::rotate_left](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.rotate_left) - [
<[_]>::rotate_right](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.rotate_right)
- Added a new chapter to the Cargo book, "Optimizing Build Performance".
- Fix backtraces with
-C panic=aborton Linux by generating unwind tables by default. Build with-C force-unwind-tables=noto keep omitting unwind tables. - As part of the larger effort refactoring compiler built-in attributes and their diagnostics, the future-compatibility lint
invalid_macro_export_argumentsis upgraded to deny-by-default and will be reported in dependencies too. - Update the minimum external LLVM to 20
- Prevent downstream
impl DerefMut for Pin - Don't apply temporary lifetime extension rules to the arguments of non-extended
pin!and formatting macros
- If a trait item appears in rustdoc search, hide the corresponding impl items. Previously a search for "last" would show both
Iterator::lastas well as impl methods likestd::vec::IntoIter::last. Now these impl methods will be hidden, freeing up space for inherent methods likeBTreeSet::last. - Relax rules for identifiers in search. Previously you could only search for identifiers that were valid in rust code, now searches only need to be valid as part of an identifier. For example, you can now perform a search that starts with a digit.
1.91.1
2025-11-10
1.91.1
2025-11-10
- Enable file locking support in illumos. This fixes Cargo not locking the build directory on illumos.
- Fix
wasm_import_moduleattribute cross-crate. This fixes linker errors on WASM targets.
1.91.0
2025-10-30
1.91.0
2025-10-30
- Lower pattern bindings in the order they're written and base drop order on primary bindings' order
- Stabilize declaration of C-style variadic functions for
sysv64,win64,efiapi, andaapcsABIs. - Add
dangling_pointers_from_localslint to warn against dangling pointers from local variables - Upgrade
semicolon_in_expressions_from_macrosfrom warn to deny - Stabilize LoongArch32 inline assembly
- Add warn-by-default
integer_to_ptr_transmuteslint against integer-to-pointer transmutes - Stabilize
sse4aandtbmtarget features - Add
target_env = "macabi"andtarget_env = "sim"cfgs as replacements for thetarget_abicfgs with the same values.
- Print thread ID in panic message
- Fix overly restrictive lifetime in
core::panic::Location::filereturn type - Guarantee parameter order for
_by()variants ofmin/max/minmaxinstd::cmp - Document assumptions about
CloneandEqtraits std::thread: Return error if setting thread stack size failsPath::file_prefixAtomicPtr::fetch_ptr_addAtomicPtr::fetch_ptr_subAtomicPtr::fetch_byte_addAtomicPtr::fetch_byte_subAtomicPtr::fetch_orAtomicPtr::fetch_andAtomicPtr::fetch_xor{integer}::strict_add{integer}::strict_sub{integer}::strict_mul{integer}::strict_div{integer}::strict_div_euclid{integer}::strict_rem{integer}::strict_rem_euclid{integer}::strict_neg{integer}::strict_shl{integer}::strict_shr{integer}::strict_powi{N}::strict_add_unsignedi{N}::strict_sub_unsignedi{N}::strict_absu{N}::strict_add_signedu{N}::strict_sub_signedPanicHookInfo::payload_as_strcore::iter::chainu{N}::checked_signed_diffcore::array::repeatPathBuf::add_extensionPathBuf::with_added_extensionDuration::from_minsDuration::from_hoursimpl PartialEqfor PathBuf impl PartialEqfor PathBuf impl PartialEqfor Path impl PartialEqfor Path impl PartialEqfor String impl PartialEqfor String impl PartialEqfor str impl PartialEqfor str Ipv4Addr::from_octetsIpv6Addr::from_octetsIpv6Addr::from_segmentsimplDefault for Pin : Default, T: ?Sized implDefault for Pin : Default, T: ?Sized implDefault for Pin : Default, T: ?Sized Cell::as_array_of_cellsu{N}::carrying_addu{N}::borrowing_subu{N}::carrying_mulu{N}::carrying_mul_addBTreeMap::extract_ifBTreeSet::extract_ifimpl Debug for windows::ffi::EncodeWide<'_>str::ceil_char_boundarystr::floor_char_boundaryimpl Sum for Saturatingimpl Sum<&Self> for Saturatingimpl Product for Saturatingimpl Product<&Self> for Saturating- [
<[T; N]>::each_ref](https://doc.rust-lang.org/stable/std/primitive.array.html#method.each_ref) - [
<[T; N]>::each_mut](https://doc.rust-lang.org/stable/std/primitive.array.html#method.each_mut) OsString::newPathBuf::newTypeId::ofptr::with_exposed_provenanceptr::with_exposed_provenance_mut
- 🎉 Stabilize
build.build-dir. - The
--targetflag and thebuild.targetconfiguration can now take literal
- Always require coroutine captures to be drop-live
- Apple: Always pass SDK root when linking with
cc, and pass it viaSDKROOTenv var. This should fix linking issues withrustcrunning inside Xcode. Libraries in/usr/local/libmay no longer be linked automatically, if you develop or use a crate that relies on this, you should explicitly setcargo::rustc-link-search=/usr/local/libin abuild.rsscript. - Relaxed bounds in associated type bound position like in
TraitRefare now correctly forbidden - [Add unstable
#[sanitize(xyz = "on|off")]built-in attribute that shadows procedural macros with the same name](https://github.com/rust-lang/rust/pull/142681) - Fix the drop checker being more permissive for bindings declared with let-else
- Be more strict when parsing attributes, erroring on many invalid attributes
- [Error on invalid
#[should_panic]attributes](https://github.com/rust-lang/rust/pull/143808) - [Error on invalid
#[link]attributes](https://github.com/rust-lang/rust/pull/143193) - Mark all deprecation lints in name resolution as deny-by-default and also report in dependencies
- The lint
semicolon_in_expressions_from_macros, formacro_rules!macros in expression position that expand to end in a semicolon (;), is now deny-by-default. It was already warn-by-default, and a future compatibility warning (FCW) that warned even in dependencies. This lint will become a hard error in the future. - Trait impl modifiers (e.g.,
unsafe,!,default) in inherent impls are no longer syntactically valid - Start reporting future breakage for
ill_formed_attribute_inputin dependencies - Restrict the scope of temporaries created by the macros
pin!,format_args!,write!, andwriteln!inif letscrutinees in Rust Edition 2024. This applies Rust Edition 2024'sif lettemporary scope rules to these temporaries, which previously could live past theifexpression regardless of Edition. - Invalid numeric literal suffixes in tuple indexing, tuple struct indexing, and struct field name positions are now correctly rejected
- Closures marked with the keyword
staticare now syntactically invalid - Shebangs inside
--cfgand--check-cfgarguments are no longer allowed - Add future incompatibility lint for temporary lifetime shortening in Rust 1.92
cargo publishno longer keeps.cratetarballs as final build artifacts- Adjust Cargo messages to match rustc diagnostic style.
- Tools and projects relying on the
- Promote
aarch64-pc-windows-gnullvmandx86_64-pc-windows-gnullvmto Tier 2 with host tools. - Promote
aarch64-pc-windows-msvcto Tier 1 - In search results, rank doc aliases lower than non-alias items with the same name
- Raw pointers now work in type-based search like references. This means you can now search for things like
*const u8 ->, and additionally functions that take or return raw pointers will now display their signature properly in search results. - Update to LLVM 21
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