Language
- Allow
#[deny]inside#[forbid]as a no-op - Show a warning when
-Ctarget-featureis used to toggle features that can lead to unsoundness due to ABI mismatches - Use the next-generation trait solver in coherence
- Allow coercions to drop the principal of trait objects
- Support
/as the path separator forinclude!()in all cases on Windows - Taking a raw ref (
raw (const|mut)) of a deref of a pointer (*ptr) is now safe - Stabilize s390x inline assembly
- Stabilize Arm64EC inline assembly
- Lint against creating pointers to immediately dropped temporaries
- Execute drop glue when unwinding in an
extern "C"function
Compiler
- Add
--print host-tupleflag to print the host target tuple and affirm the "target tuple" terminology over "target triple" - Declaring functions with a calling convention not supported on the current target now triggers a hard error
- Set up indirect access to external data for
loongarch64-unknown-linux-{musl,ohos} - Enable XRay instrumentation for LoongArch Linux targets
- Extend the
unexpected_cfgslint to also warn in external macros - Stabilize WebAssembly
multivalue,reference-types, andtail-calltarget features - Added Tier 2 support for the
wasm32v1-nonetarget
Libraries
- Implement
From<&mut {slice}>forBox/Rc/Arc<{slice}> - Move
<float>::copysign,<float>::abs,<float>::signumtocore - Add
LowerExpandUpperExpimplementations toNonZero - Implement
FromStrforCStringandTryFrom<CString>forString std::os::darwinhas been made public
Stabilized APIs
Ipv6Addr::is_unique_localIpv6Addr::is_unicast_link_localcore::ptr::with_exposed_provenancecore::ptr::with_exposed_provenance_mut<ptr>::addr<ptr>::expose_provenance<ptr>::with_addr<ptr>::map_addr<int>::isqrt<int>::checked_isqrt<uint>::isqrtNonZero::isqrtcore::ptr::without_provenancecore::ptr::without_provenance_mutcore::ptr::danglingcore::ptr::dangling_mutPin::as_deref_mut
These APIs are now stable in const contexts
AtomicBool::from_ptrAtomicPtr::from_ptrAtomicU8::from_ptrAtomicU16::from_ptrAtomicU32::from_ptrAtomicU64::from_ptrAtomicUsize::from_ptrAtomicI8::from_ptrAtomicI16::from_ptrAtomicI32::from_ptrAtomicI64::from_ptrAtomicIsize::from_ptr<ptr>::is_null<ptr>::as_ref<ptr>::as_mutPin::newPin::new_uncheckedPin::get_refPin::into_refPin::get_mutPin::get_unchecked_mutPin::static_refPin::static_mut
Cargo
Rustdoc
Compatibility Notes
- Enable by default the
LSXtarget feature for LoongArch Linux targets - The unstable
-Zprofileflag (“gcov-style” coverage instrumentation) has been removed. This does not affect the stable flags for coverage instrumentation (-Cinstrument-coverage) and profile-guided optimization (-Cprofile-generate,-Cprofile-use), which are unrelated and remain available. - Support for the target named
wasm32-wasihas been removed as the target is now namedwasm32-wasip1. This completes the transition plan for this target following the introduction ofwasm32-wasip1in Rust 1.78. Compiler warnings on use ofwasm32-wasiintroduced in Rust 1.81 are now gone as well as the target is removed. - The syntax
&pin (mut|const) Tis now parsed as a type which in theory could affect macro expansion results in some edge cases - Legacy syntax for calling
std::archfunctions is no longer permitted to declare items or bodies (such as closures, inline consts, or async blocks). - The
wasm32-unknown-emscriptentarget's binary release of the standard library is now built with the latest emsdk 3.1.68, which fixes an ABI-incompatibility with Emscripten >= 3.1.42. If you are locally using a version of emsdk with an incompatible ABI (e.g. before 3.1.42 or a future one), you should build your code with-Zbuild-stdto ensure thatstduses the correct ABI. - Declaring functions with a calling convention not supported on the current target now triggers a hard error
- The next-generation trait solver is now enabled for coherence, fixing multiple soundness issues