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This PR contains the following updates:
1.80.1->1.81.0Release Notes
rust-lang/rust (rust)
### [`v1.81.0`](https://redirect.github.com/rust-lang/rust/blob/HEAD/RELEASES.md#Version-1810-2024-09-05) [Compare Source](https://redirect.github.com/rust-lang/rust/compare/1.80.1...1.81.0) \========================== ## Language - [Abort on uncaught panics in `extern "C"` functions.](https://redirect.github.com/rust-lang/rust/pull/116088/) - [Fix ambiguous cases of multiple `&` in elided self lifetimes.](https://redirect.github.com/rust-lang/rust/pull/117967/) - [Stabilize `#[expect]` for lints (RFC 2383),](https://redirect.github.com/rust-lang/rust/pull/120924/) like `#[allow]` with a warning if the lint is *not* fulfilled. - [Change method resolution to constrain hidden types instead of rejecting method candidates.](https://redirect.github.com/rust-lang/rust/pull/123962/) - [Bump `elided_lifetimes_in_associated_constant` to deny.](https://redirect.github.com/rust-lang/rust/pull/124211/) - [`offset_from`: always allow pointers to point to the same address.](https://redirect.github.com/rust-lang/rust/pull/124921/) - [Allow constraining opaque types during subtyping in the trait system.](https://redirect.github.com/rust-lang/rust/pull/125447/) - [Allow constraining opaque types during various unsizing casts.](https://redirect.github.com/rust-lang/rust/pull/125610/) - [Deny keyword lifetimes pre-expansion.](https://redirect.github.com/rust-lang/rust/pull/126762/) ## Compiler - [Make casts of pointers to trait objects stricter.](https://redirect.github.com/rust-lang/rust/pull/120248/) - [Check alias args for well-formedness even if they have escaping bound vars.](https://redirect.github.com/rust-lang/rust/pull/123737/) - [Deprecate no-op codegen option `-Cinline-threshold=...`.](https://redirect.github.com/rust-lang/rust/pull/124712/) - [Re-implement a type-size based limit.](https://redirect.github.com/rust-lang/rust/pull/125507/) - [Properly account for alignment in `transmute` size checks.](https://redirect.github.com/rust-lang/rust/pull/125740/) - [Remove the `box_pointers` lint.](https://redirect.github.com/rust-lang/rust/pull/126018/) - [Ensure the interpreter checks bool/char for validity when they are used in a cast.](https://redirect.github.com/rust-lang/rust/pull/126265/) - [Improve coverage instrumentation for functions containing nested items.](https://redirect.github.com/rust-lang/rust/pull/127199/) - Target changes: - [Add Tier 3 `no_std` Xtensa targets:](https://redirect.github.com/rust-lang/rust/pull/125141/) `xtensa-esp32-none-elf`, `xtensa-esp32s2-none-elf`, `xtensa-esp32s3-none-elf` - [Add Tier 3 `std` Xtensa targets:](https://redirect.github.com/rust-lang/rust/pull/126380/) `xtensa-esp32-espidf`, `xtensa-esp32s2-espidf`, `xtensa-esp32s3-espidf` - [Add Tier 3 i686 Redox OS target:](https://redirect.github.com/rust-lang/rust/pull/126192/) `i686-unknown-redox` - [Promote `arm64ec-pc-windows-msvc` to Tier 2.](https://redirect.github.com/rust-lang/rust/pull/126039/) - [Promote `wasm32-wasip2` to Tier 2.](https://redirect.github.com/rust-lang/rust/pull/126967/) - [Promote `loongarch64-unknown-linux-musl` to Tier 2 with host tools.](https://redirect.github.com/rust-lang/rust/pull/126298/) - [Enable full tools and profiler for LoongArch Linux targets.](https://redirect.github.com/rust-lang/rust/pull/127078/) - [Unconditionally warn on usage of `wasm32-wasi`.](https://redirect.github.com/rust-lang/rust/pull/126662/) (see compatibility note below) - Refer to Rust's \[platform support page]\[platform-support-doc] for more information on Rust's tiered platform support. ## Libraries - [Split core's `PanicInfo` and std's `PanicInfo`.](https://redirect.github.com/rust-lang/rust/pull/115974/) (see compatibility note below) - [Generalize `{Rc,Arc}::make_mut()` to unsized types.](https://redirect.github.com/rust-lang/rust/pull/116113/) - [Replace sort implementations with stable `driftsort` and unstable `ipnsort`.](https://redirect.github.com/rust-lang/rust/pull/124032/) All `slice::sort*` and `slice::select_nth*` methods are expected to see significant performance improvements. See the [research project](https://redirect.github.com/Voultapher/sort-research-rs) for more details. - [Document behavior of `create_dir_all` with respect to empty paths.](https://redirect.github.com/rust-lang/rust/pull/125112/) - [Fix interleaved output in the default panic hook when multiple threads panic simultaneously.](https://redirect.github.com/rust-lang/rust/pull/127397/) ## Stabilized APIs - [`core::error`](https://doc.rust-lang.org/stable/core/error/index.html) - [`hint::assert_unchecked`](https://doc.rust-lang.org/stable/core/hint/fn.assert_unchecked.html) - [`fs::exists`](https://doc.rust-lang.org/stable/std/fs/fn.exists.html) - [`AtomicBool::fetch_not`](https://doc.rust-lang.org/stable/core/sync/atomic/struct.AtomicBool.html#method.fetch_not) - [`Duration::abs_diff`](https://doc.rust-lang.org/stable/core/time/struct.Duration.html#method.abs_diff) - [`IoSlice::advance`](https://doc.rust-lang.org/stable/std/io/struct.IoSlice.html#method.advance) - [`IoSlice::advance_slices`](https://doc.rust-lang.org/stable/std/io/struct.IoSlice.html#method.advance_slices) - [`IoSliceMut::advance`](https://doc.rust-lang.org/stable/std/io/struct.IoSliceMut.html#method.advance) - [`IoSliceMut::advance_slices`](https://doc.rust-lang.org/stable/std/io/struct.IoSliceMut.html#method.advance_slices) - [`PanicHookInfo`](https://doc.rust-lang.org/stable/std/panic/struct.PanicHookInfo.html) - [`PanicInfo::message`](https://doc.rust-lang.org/stable/core/panic/struct.PanicInfo.html#method.message) - [`PanicMessage`](https://doc.rust-lang.org/stable/core/panic/struct.PanicMessage.html) These APIs are now stable in const contexts: - [`char::from_u32_unchecked`](https://doc.rust-lang.org/stable/core/char/fn.from_u32\_unchecked.html) (function) - [`char::from_u32_unchecked`](https://doc.rust-lang.org/stable/core/primitive.char.html#method.from_u32\_unchecked) (method) - [`CStr::count_bytes`](https://doc.rust-lang.org/stable/core/ffi/c_str/struct.CStr.html#method.count_bytes) - [`CStr::from_ptr`](https://doc.rust-lang.org/stable/core/ffi/c_str/struct.CStr.html#method.from_ptr) ## Cargo - [Generated `.cargo_vcs_info.json` is always included, even when `--allow-dirty` is passed.](https://redirect.github.com/rust-lang/cargo/pull/13960/) - [Disallow `package.license-file` and `package.readme` pointing to non-existent files during packaging.](https://redirect.github.com/rust-lang/cargo/pull/13921/) - [Disallow passing `--release`/`--debug` flag along with the `--profile` flag.](https://redirect.github.com/rust-lang/cargo/pull/13971/) - [Remove `lib.plugin` key support in `Cargo.toml`. Rust plugin support has been deprecated for four years and was removed in 1.75.0.](https://redirect.github.com/rust-lang/cargo/pull/13902/) ## Compatibility Notes - Usage of the `wasm32-wasi` target will now issue a compiler warning and request users switch to the `wasm32-wasip1` target instead. Both targets are the same, `wasm32-wasi` is only being renamed, and this [change to the WASI target](https://blog.rust-lang.org/2024/04/09/updates-to-rusts-wasi-targets.html) is being done to enable removing `wasm32-wasi` in January 2025. - We have renamed `std::panic::PanicInfo` to `std::panic::PanicHookInfo`. The old name will continue to work as an alias, but will result in a deprecation warning starting in Rust 1.82.0. `core::panic::PanicInfo` will remain unchanged, however, as this is now a *different type*. The reason is that these types have different roles: `std::panic::PanicHookInfo` is the argument to the [panic hook](https://doc.rust-lang.org/stable/std/panic/fn.set_hook.html) in std context (where panics can have an arbitrary payload), while `core::panic::PanicInfo` is the argument to the [`#[panic_handler]`](https://doc.rust-lang.org/nomicon/panic-handler.html) in no_std context (where panics always carry a formatted *message*). Separating these types allows us to add more useful methods to these types, such as `std::panic::PanicHookInfo::payload_as_str()` and `core::panic::PanicInfo::message()`. - The new sort implementations may panic if a type's implementation of [`Ord`](https://doc.rust-lang.org/std/cmp/trait.Ord.html) (or the given comparison function) does not implement a [total order](https://en.wikipedia.org/wiki/Total_order) as the trait requires. `Ord`'s supertraits (`PartialOrd`, `Eq`, and `PartialEq`) must also be consistent. The previous implementations would not "notice" any problem, but the new implementations have a good chance of detecting inconsistencies, throwing a panic rather than returning knowingly unsorted data. ## Internal Changes These changes do not affect any public interfaces of Rust, but they represent significant improvements to the performance or internals of rustc and related tools. - [Add a Rust-for Linux `auto` CI job to check kernel builds.](https://redirect.github.com/rust-lang/rust/pull/125209/)Configuration
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