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Version 1.69.0 (2023-04-20)
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==========================
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<a id="1.69.0-Language"></a>
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Language
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--------
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- [Deriving built-in traits on packed structs works with `Copy` fields.](https://github.com/rust-lang/rust/pull/104429/)
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- [Stabilize the `cmpxchg16b` target feature on x86 and x86_64.](https://github.com/rust-lang/rust/pull/106774/)
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- [Improve analysis of trait bounds for associated types.](https://github.com/rust-lang/rust/pull/103695/)
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- [Allow associated types to be used as union fields.](https://github.com/rust-lang/rust/pull/106938/)
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- [Allow `Self: Autotrait` bounds on dyn-safe trait methods.](https://github.com/rust-lang/rust/pull/107082/)
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- [Treat `str` as containing `[u8]` for auto trait purposes.](https://github.com/rust-lang/rust/pull/107941/)
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<a id="1.69.0-Compiler"></a>
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Compiler
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--------
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- [Upgrade `*-pc-windows-gnu` on CI to mingw-w64 v10 and GCC 12.2.](https://github.com/rust-lang/rust/pull/100178/)
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- [Rework min_choice algorithm of member constraints.](https://github.com/rust-lang/rust/pull/105300/)
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- [Support `true` and `false` as boolean flags in compiler arguments.](https://github.com/rust-lang/rust/pull/107043/)
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- [Default `repr(C)` enums to `c_int` size.](https://github.com/rust-lang/rust/pull/107592/)
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<a id="1.69.0-Libraries"></a>
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Libraries
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---------
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- [Implement the unstable `DispatchFromDyn` for cell types, allowing downstream experimentation with custom method receivers.](https://github.com/rust-lang/rust/pull/97373/)
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- [Document that `fmt::Arguments::as_str()` may return `Some(_)` in more cases after optimization, subject to change.](https://github.com/rust-lang/rust/pull/106823/)
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- [Implement `AsFd` and `AsRawFd` for `Rc`.](https://github.com/rust-lang/rust/pull/107317/)
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<a id="1.69.0-Stabilized-APIs"></a>
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Stabilized APIs
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---------------
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- [`CStr::from_bytes_until_nul`](https://doc.rust-lang.org/stable/core/ffi/struct.CStr.html#method.from_bytes_until_nul)
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- [`core::ffi::FromBytesUntilNulError`](https://doc.rust-lang.org/stable/core/ffi/struct.FromBytesUntilNulError.html)
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These APIs are now stable in const contexts:
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- [`SocketAddr::new`](https://doc.rust-lang.org/stable/std/net/enum.SocketAddr.html#method.new)
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- [`SocketAddr::ip`](https://doc.rust-lang.org/stable/std/net/enum.SocketAddr.html#method.ip)
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- [`SocketAddr::port`](https://doc.rust-lang.org/stable/std/net/enum.SocketAddr.html#method.port)
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- [`SocketAddr::is_ipv4`](https://doc.rust-lang.org/stable/std/net/enum.SocketAddr.html#method.is_ipv4)
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- [`SocketAddr::is_ipv6`](https://doc.rust-lang.org/stable/std/net/enum.SocketAddr.html#method.is_ipv6)
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- [`SocketAddrV4::new`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV4.html#method.new)
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- [`SocketAddrV4::ip`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV4.html#method.ip)
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- [`SocketAddrV4::port`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV4.html#method.port)
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- [`SocketAddrV6::new`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.new)
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- [`SocketAddrV6::ip`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.ip)
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- [`SocketAddrV6::port`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.port)
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- [`SocketAddrV6::flowinfo`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.flowinfo)
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- [`SocketAddrV6::scope_id`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.scope_id)
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<a id="1.69.0-Cargo"></a>
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Cargo
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-----
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- [Cargo now suggests `cargo fix` or `cargo clippy --fix` when compilation warnings are auto-fixable.](https://github.com/rust-lang/cargo/pull/11558/)
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- [Cargo now suggests `cargo add` if you try to install a library crate.](https://github.com/rust-lang/cargo/pull/11410/)
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- [Cargo now sets the `CARGO_BIN_NAME` environment variable also for binary examples.](https://github.com/rust-lang/cargo/pull/11705/)
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<a id="1.69.0-Rustdoc"></a>
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Rustdoc
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-----
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- [Vertically compact trait bound formatting.](https://github.com/rust-lang/rust/pull/102842/)
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- [Only include stable lints in `rustdoc::all` group.](https://github.com/rust-lang/rust/pull/106316/)
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- [Compute maximum Levenshtein distance based on the query.](https://github.com/rust-lang/rust/pull/107141/)
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- [Remove inconsistently-present sidebar tooltips.](https://github.com/rust-lang/rust/pull/107490/)
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- [Search by macro when query ends with `!`.](https://github.com/rust-lang/rust/pull/108143/)
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<a id="1.69.0-Compatibility-Notes"></a>
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Compatibility Notes
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-------------------
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- [The `rust-analysis` component from `rustup` now only contains a warning placeholder.](https://github.com/rust-lang/rust/pull/101841/) This was primarily intended for RLS, and the corresponding `-Zsave-analysis` flag has been removed from the compiler as well.
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- [Unaligned references to packed fields are now a hard error.](https://github.com/rust-lang/rust/pull/102513/) This has been a warning since 1.53, and denied by default with a future-compatibility warning since 1.62.
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- [Update the minimum external LLVM to 14.](https://github.com/rust-lang/rust/pull/107573/)
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- [Cargo now emits errors on invalid characters in a registry token.](https://github.com/rust-lang/cargo/pull/11600/)
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- [When `default-features` is set to false of a workspace dependency, and an inherited dependency of a member has `default-features = true`, Cargo will enable default features of that dependency.](https://github.com/rust-lang/cargo/pull/11409/)
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- [Cargo denies `CARGO_HOME` in the `[env]` configuration table. Cargo itself doesn't pick up this value, but recursive calls to cargo would, which was not intended.](https://github.com/rust-lang/cargo/pull/11644/)
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- [Debuginfo for build dependencies is now off if not explicitly set. This is expected to improve the overall build time.](https://github.com/rust-lang/cargo/pull/11252/)
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<a id="1.69.0-Internal-Changes"></a>
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Internal Changes
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----------------
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These changes do not affect any public interfaces of Rust, but they represent
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significant improvements to the performance or internals of rustc and related
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tools.
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- [Move `format_args!()` into AST (and expand it during AST lowering)](https://github.com/rust-lang/rust/pull/106745/)
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Version 1.68.2 (2023-03-28)
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===========================
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- [Update the GitHub RSA host key bundled within Cargo](https://github.com/rust-lang/cargo/pull/11883).
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The key was [rotated by GitHub](https://github.blog/2023-03-23-we-updated-our-rsa-ssh-host-key/)
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on 2023-03-24 after the old one leaked.
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- [Mark the old GitHub RSA host key as revoked](https://github.com/rust-lang/cargo/pull/11889).
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This will prevent Cargo from accepting the leaked key even when trusted by
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the system.
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- [Add support for `@revoked` and a better error message for `@cert-authority` in Cargo's SSH host key verification](https://github.com/rust-lang/cargo/pull/11635)
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Version 1.68.1 (2023-03-23)
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===========================
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- [Fix miscompilation in produced Windows MSVC artifacts](https://github.com/rust-lang/rust/pull/109094)
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This was introduced by enabling ThinLTO for the distributed rustc which led
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to miscompilations in the resulting binary. Currently this is believed to be
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limited to the -Zdylib-lto flag used for rustc compilation, rather than a
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general bug in ThinLTO, so only rustc artifacts should be affected.
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- [Fix --enable-local-rust builds](https://github.com/rust-lang/rust/pull/109111/)
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- [Treat `$prefix-clang` as `clang` in linker detection code](https://github.com/rust-lang/rust/pull/109156)
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- [Fix panic in compiler code](https://github.com/rust-lang/rust/pull/108162)
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Version 1.68.0 (2023-03-09)
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==========================
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<a id="1.68.0-Language"></a>
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Language
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--------
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- [Stabilize default_alloc_error_handler](https://github.com/rust-lang/rust/pull/102318/)
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This allows usage of `alloc` on stable without requiring the
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definition of a handler for allocation failure. Defining custom handlers is still unstable.
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- [Stabilize `efiapi` calling convention.](https://github.com/rust-lang/rust/pull/105795/)
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- [Remove implicit promotion for types with drop glue](https://github.com/rust-lang/rust/pull/105085/)
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<a id="1.68.0-Compiler"></a>
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Compiler
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--------
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- [Change `bindings_with_variant_name` to deny-by-default](https://github.com/rust-lang/rust/pull/104154/)
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- [Allow .. to be parsed as let initializer](https://github.com/rust-lang/rust/pull/105701/)
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- [Add `armv7-sony-vita-newlibeabihf` as a tier 3 target](https://github.com/rust-lang/rust/pull/105712/)
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- [Always check alignment during compile-time const evaluation](https://github.com/rust-lang/rust/pull/104616/)
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- [Disable "split dwarf inlining" by default.](https://github.com/rust-lang/rust/pull/106709/)
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- [Add vendor to Fuchsia's target triple](https://github.com/rust-lang/rust/pull/106429/)
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- [Enable sanitizers for s390x-linux](https://github.com/rust-lang/rust/pull/107127/)
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<a id="1.68.0-Libraries"></a>
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Libraries
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---------
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- [Loosen the bound on the Debug implementation of Weak.](https://github.com/rust-lang/rust/pull/90291/)
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- [Make `std::task::Context` !Send and !Sync](https://github.com/rust-lang/rust/pull/95985/)
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- [PhantomData layout guarantees](https://github.com/rust-lang/rust/pull/104081/)
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- [Don't derive Debug for `OnceWith` & `RepeatWith`](https://github.com/rust-lang/rust/pull/104163/)
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- [Implement DerefMut for PathBuf](https://github.com/rust-lang/rust/pull/105018/)
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- [Add O(1) `Vec -> VecDeque` conversion guarantee](https://github.com/rust-lang/rust/pull/105128/)
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- [Leak amplification for peek_mut() to ensure BinaryHeap's invariant is always met](https://github.com/rust-lang/rust/pull/105851/)
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<a id="1.68.0-Stabilized-APIs"></a>
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Stabilized APIs
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---------------
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- [`{core,std}::pin::pin!`](https://doc.rust-lang.org/stable/std/pin/macro.pin.html)
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- [`impl From<bool> for {f32,f64}`](https://doc.rust-lang.org/stable/std/primitive.f32.html#impl-From%3Cbool%3E-for-f32)
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- [`std::path::MAIN_SEPARATOR_STR`](https://doc.rust-lang.org/stable/std/path/constant.MAIN_SEPARATOR_STR.html)
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- [`impl DerefMut for PathBuf`](https://doc.rust-lang.org/stable/std/path/struct.PathBuf.html#impl-DerefMut-for-PathBuf)
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These APIs are now stable in const contexts:
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- [`VecDeque::new`](https://doc.rust-lang.org/stable/std/collections/struct.VecDeque.html#method.new)
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<a id="1.68.0-Cargo"></a>
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Cargo
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-----
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- [Stabilize sparse registry support for crates.io](https://github.com/rust-lang/cargo/pull/11224/)
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- [`cargo build --verbose` tells you more about why it recompiles.](https://github.com/rust-lang/cargo/pull/11407/)
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- [Show progress of crates.io index update even `net.git-fetch-with-cli` option enabled](https://github.com/rust-lang/cargo/pull/11579/)
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<a id="1.68.0-Misc"></a>
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Misc
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----
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<a id="1.68.0-Compatibility-Notes"></a>
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Compatibility Notes
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-------------------
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- [Only support Android NDK 25 or newer](https://blog.rust-lang.org/2023/01/09/android-ndk-update-r25.html)
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- [Add `SEMICOLON_IN_EXPRESSIONS_FROM_MACROS` to future-incompat report](https://github.com/rust-lang/rust/pull/103418/)
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- [Only specify `--target` by default for `-Zgcc-ld=lld` on wasm](https://github.com/rust-lang/rust/pull/101792/)
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- [Bump `IMPLIED_BOUNDS_ENTAILMENT` to Deny + ReportNow](https://github.com/rust-lang/rust/pull/106465/)
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- [`std::task::Context` no longer implements Send and Sync](https://github.com/rust-lang/rust/pull/95985)
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<a id="1.68.0-Internal-Changes"></a>
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Internal Changes
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----------------
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These changes do not affect any public interfaces of Rust, but they represent
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significant improvements to the performance or internals of rustc and related
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tools.
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- [Encode spans relative to the enclosing item](https://github.com/rust-lang/rust/pull/84762/)
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- [Don't normalize in AstConv](https://github.com/rust-lang/rust/pull/101947/)
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- [Find the right lower bound region in the scenario of partial order relations](https://github.com/rust-lang/rust/pull/104765/)
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- [Fix impl block in const expr](https://github.com/rust-lang/rust/pull/104889/)
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- [Check ADT fields for copy implementations considering regions](https://github.com/rust-lang/rust/pull/105102/)
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- [rustdoc: simplify JS search routine by not messing with lev distance](https://github.com/rust-lang/rust/pull/105796/)
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- [Enable ThinLTO for rustc on `x86_64-pc-windows-msvc`](https://github.com/rust-lang/rust/pull/103591/)
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- [Enable ThinLTO for rustc on `x86_64-apple-darwin`](https://github.com/rust-lang/rust/pull/103647/)
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Version 1.67.1 (2023-02-09)
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===========================
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- [Optimize field ordering by grouping m\*2^n-sized fields with equivalently aligned ones.](https://github.com/rust-lang/rust/pull/102750/)
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- [Stabilize native library modifier `verbatim`.](https://github.com/rust-lang/rust/pull/104360/)
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Added and removed targets:
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Added, updated, and removed targets:
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- [Add a tier 3 target for PowerPC on AIX](https://github.com/rust-lang/rust/pull/102293/), `powerpc64-ibm-aix`.
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- [Add a tier 3 target for the Sony PlayStation 1](https://github.com/rust-lang/rust/pull/102689/), `mipsel-sony-psx`.
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- [Add tier 3 `no_std` targets for the QNX Neutrino RTOS](https://github.com/rust-lang/rust/pull/102701/),
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`aarch64-unknown-nto-qnx710` and `x86_64-pc-nto-qnx710`.
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- [Promote UEFI targets to tier 2](https://github.com/rust-lang/rust/pull/103933/), `aarch64-unknown-uefi`, `i686-unknown-uefi`, and `x86_64-unknown-uefi`.
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- [Remove tier 3 `linuxkernel` targets](https://github.com/rust-lang/rust/pull/104015/) (not used by the actual kernel).
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Refer to Rust's [platform support page][platform-support-doc]
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* [Always check types of static items][69145]
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* [Always check lifetime bounds of `Copy` impls][69145]
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* [Fix miscompilation in callers of `Layout::repeat`][69225]
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* [Rust 1.41.0 was announced as the last Rust release with tier 1 or tier 2 support for 32-bit Apple targets][apple-32bit-drop].
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That announcement did not expect a patch release. 1.41.1 also includes release binaries for these targets.
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[69225]: https://github.com/rust-lang/rust/issues/69225
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[69145]: https://github.com/rust-lang/rust/pull/69145
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Compatibility Notes
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-------------------
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- [As previously announced 1.41.0 will be the last tier 1 release for 32-bit
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- [As previously announced 1.41 will be the last tier 1 release for 32-bit
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Apple targets.][apple-32bit-drop] This means that the source code is still
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available to build, but the targets are no longer being tested and release
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binaries for those platforms will no longer be distributed by the Rust project.

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