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RELEASES.md
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RELEASES.md
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Version 1.84.0 (2025-01-09)
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==========================
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<a id="
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Language"></a>
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Language
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--------
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- [Allow `#[deny]` inside `#[forbid]` as a no-op](https://github.com/rust-lang/rust/pull/121560/)
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- [Show a warning when `-Ctarget-feature` is used to toggle features that can lead to unsoundness due to ABI mismatches](https://github.com/rust-lang/rust/pull/129884)
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- [Use the next-generation trait solver in coherence](https://github.com/rust-lang/rust/pull/130654)
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- [Allow coercions to drop the principal of trait objects](https://github.com/rust-lang/rust/pull/131857)
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- [Support `/` as the path separator for `include!()` in all cases on Windows](https://github.com/rust-lang/rust/pull/125205)
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- [Taking a raw ref (`raw (const|mut)`) of a deref of a pointer (`*ptr`) is now safe](https://github.com/rust-lang/rust/pull/129248)
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- [Stabilize s390x inline assembly](https://github.com/rust-lang/rust/pull/131258)
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- [Stabilize Arm64EC inline assembly](https://github.com/rust-lang/rust/pull/131781)
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- [Lint against creating pointers to immediately dropped temporaries](https://github.com/rust-lang/rust/pull/128985)
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- [Execute drop glue when unwinding in an `extern "C"` function](https://github.com/rust-lang/rust/pull/129582)
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<a id="1.84.0-Compiler"></a>
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Compiler
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--------
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- [Add `--print host-tuple` flag to print the host target tuple and affirm the "target tuple" terminology over "target triple"](https://github.com/rust-lang/rust/pull/125579)
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- [Declaring functions with a calling convention not supported on the current target now triggers a hard error](https://github.com/rust-lang/rust/pull/129935)
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- [Set up indirect access to external data for `loongarch64-unknown-linux-{musl,ohos}`](https://github.com/rust-lang/rust/pull/131583)
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- [Enable XRay instrumentation for LoongArch Linux targets](https://github.com/rust-lang/rust/pull/131818)
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- [Extend the `unexpected_cfgs` lint to also warn in external macros](https://github.com/rust-lang/rust/pull/132577)
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- [Stabilize WebAssembly `multivalue`, `reference-types`, and `tail-call` target features](https://github.com/rust-lang/rust/pull/131080)
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- [Added Tier 2 support for the `wasm32v1-none` target](https://github.com/rust-lang/rust/pull/131487)
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<a id="1.84.0-Libraries"></a>
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Libraries
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---------
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- [Implement `From<&mut {slice}>` for `Box/Rc/Arc<{slice}>`](https://github.com/rust-lang/rust/pull/129329)
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- [Move `<float>::copysign`, `<float>::abs`, `<float>::signum` to `core`](https://github.com/rust-lang/rust/pull/131304)
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- [Add `LowerExp` and `UpperExp` implementations to `NonZero`](https://github.com/rust-lang/rust/pull/131377)
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- [Implement `FromStr` for `CString` and `TryFrom<CString>` for `String`](https://github.com/rust-lang/rust/pull/130608)
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- [`std::os::darwin` has been made public](https://github.com/rust-lang/rust/pull/130635)
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<a id="1.84.0-Stabilized-APIs"></a>
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Stabilized APIs
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---------------
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- [`Ipv6Addr::is_unique_local`]
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- [`Ipv6Addr::is_unicast_link_local`]
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- [`core::ptr::with_exposed_provenance`]
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- [`core::ptr::with_exposed_provenance::mut`]
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- [`<ptr>::addr`]
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- [`<ptr>::expose_provenance`]
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- [`<ptr>::with_addr`]
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- [`<ptr>::map_addr`]
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These APIs are now stable in const contexts
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- [`AtomicBool::from_ptr`]
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- [`AtomicPtr::from_ptr`]
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- [`AtomicU8::from_ptr`]
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- [`AtomicU16::from_ptr`]
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- [`AtomicU32::from_ptr`]
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- [`AtomicU64::from_ptr`]
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- [`AtomicUsize::from_ptr`]
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- [`AtomicI8::from_ptr`]
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- [`AtomicI16::from_ptr`]
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- [`AtomicI32::from_ptr`]
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- [`AtomicI64::from_ptr`]
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- [`AtomicIsize::from_ptr`]
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- [`<ptr>::is_null`]
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- [`<ptr>::as_ref`]
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- [`<ptr>::as_mut`]
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- [`core::ptr::without_provenance`]
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- [`core::ptr::without_provenance_mut`]
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- [`core::ptr::dangling`]
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- [`core::ptr::dangling_mut`]
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- [`Pin::new`]
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- [`Pin::new_unchecked`]
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- [`Pin::get_ref`]
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- [`Pin::into_ref`]
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- [`Pin::get_mut`]
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- [`Pin::get_unchecked_mut`]
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- [`Pin::static_ref`]
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- [`Pin::static_mut`]
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- [`<int>::isqrt`]
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- [`<int>::checked_isqrt`]
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- [`<uint>::isqrt`]
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- [`NonZero::isqrt`]
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<a id="1.84.0-Cargo"></a>
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Cargo
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-----
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- [Stabilize MSRV-aware resolver config](https://github.com/rust-lang/cargo/pull/14639/)
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- [Stabilize resolver v3](https://github.com/rust-lang/cargo/pull/14754/)
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<a id="1.84-Rustdoc"></a>
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Rustdoc
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-------
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- [rustdoc-search: improve type-driven search](https://github.com/rust-lang/rust/pull/127589)
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<a id="1.84.0-Compatibility-Notes"></a>
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Compatibility Notes
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-------------------
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- [Enable by default the `LSX` target feature for LoongArch Linux targets](https://github.com/rust-lang/rust/pull/132140)
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- [The unstable `-Zprofile` flag (“gcov-style” coverage instrumentation) has been removed.](https://github.com/rust-lang/rust/pull/131829) 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.
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- Support for the target named `wasm32-wasi` has been removed as the target is now named `wasm32-wasip1`. This completes the [transition](https://github.com/rust-lang/compiler-team/issues/607) [plan](https://github.com/rust-lang/compiler-team/issues/695) for this target following [the introduction of `wasm32-wasip1`](https://github.com/rust-lang/rust/pull/120468) in Rust 1.78. Compiler warnings on [use of `wasm32-wasi`](https://github.com/rust-lang/rust/pull/126662) introduced in Rust 1.81 are now gone as well as the target is removed.
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- [The syntax `&pin (mut|const) T` is now parsed as a type which in theory could affect macro expansion results in some edge cases](https://github.com/rust-lang/rust/pull/130635#issuecomment-2375462821)
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- [Legacy syntax for calling `std::arch` functions is no longer permitted to declare items or bodies (such as closures, inline consts, or async blocks).](https://github.com/rust-lang/rust/pull/130443#issuecomment-2445678945)
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- The `wasm32-unknown-emscripten` target's binary release of the standard library is now [built with the latest emsdk 3.1.68](https://github.com/rust-lang/rust/pull/131533), 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-std` to ensure that `std` uses the correct ABI.
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Version 1.83.0 (2024-11-28)
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==========================
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