Implement raw lifetimes and labels (`'r#ident`) by compiler-errors · Pull Request #126452 · rust-lang/rust (original) (raw)

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This PR does two things:

Reserve lifetime prefixes, e.g. 'prefix#lt in edition 2021.
Implements raw lifetimes, e.g. 'r#async in edition 2021.

This PR additionally extends the keyword_idents_2024 lint to also check lifetimes.

cc @traviscross
r? parser

rustbot added S-waiting-on-review

Status: Awaiting review from the assignee but also interested parties.

T-compiler

Relevant to the compiler team, which will review and decide on the PR/issue.

labels

Jun 14, 2024

The only theoretical breakage is this:

macro_rules! lt { ($lt:lifetime # $id:ident) => {} }

lt!('r#a);

edit: whoops, @fmease also notes that it breaks:

#[cfg(any())] fn f<'async>(_: &'async ()) {}

This comment has been minimized.

Also, this doesn't reserve all prefixed lifetimes -- it just implements 'r#. Not sure if T-lang wants all prefixes to be reserved as well.

rust-analyzer is developed in its own repository. If possible, consider making this change to rust-lang/rust-analyzer instead.

cc @rust-lang/rust-analyzer

Some changes occurred in src/tools/rustfmt

cc @rust-lang/rustfmt

r-a and rustfmt changes are required due to changes to lexer and parser, respectively.

This comment has been minimized.

bors added a commit to rust-lang-ci/rust that referenced this pull request

Jun 14, 2024

Implement raw lifetimes and labels ('r#ident)

This PR implements a syntax for raw lifetimes and labels as requested in rust-lang#126335.

This PR also moves keyword lifetime validation (i.e. checking that we don't have something like 'async) from ast validation to the parser, similar to how we handle raw identifiers, since we don't distinguish raw identifiers after parsing.

This PR additionally extends the keyword_idents_2024 lint to also check identifiers.

cc @traviscross r? parser

☀️ Try build successful - checks-actions
Build commit: d9cbfeb (d9cbfeb054d7bd02cf942e6d32c1c0a91f042ce9)

🚧 Experiment pr-126452 is now running

ℹ️ Crater is a tool to run experiments across parts of the Rust ecosystem. Learn more

There's a crate that specifically abuses 'ref which is a keyword lifetime. Might have to find a workaround for this.

FWIW, as documented over https://docs.rs/with_locals/0.3.2/with_locals/index.html#remarks, the 'ref lifetime choice is just a default one. Users can always provide their own lifetime marker instead. This means that it is possible for users to adjust their code to the change of this PR if needs be.

(if we could afford the wait, I could even patch the crate to start warning about the direct 'ref usage (DIY FCW, sort of))

@rustbot labels -I-lang-nominated

We discussed this in the lang triage call today.

We confirmed that we mean for all prefixed lifetimes to be reserved, not just 'r# ones. We view both the missing reservation and the missing support for 'r# as bug fixes consistent with the intent of RFC 3101. The result of this reservation is that these prefixed lifetimes will be parsed as single tokens rather than as many.

Secondly, we confirmed that we're OK with moving the validation of keywords in lifetimes to pre-expansion from post-expansion. We similarly consider this a bug fix. While the breakage of the convenience feature of the with_locals crate that relies on this is unfortunate, and we wish we had not overlooked this earlier for that reason, we're fortunate that the breakage is contained to only one crate, and we're going to accept this breakage as the extra complexity we'd need to carry in the compiler to work around this isn't deemed worth it.

Thanks in particular to @danielhenrymantilla for being responsive on this and understanding of the situation.

📌 Commit b6a86be has been approved by spastorino

It is now in the queue for this repository.

bors added S-waiting-on-bors

Status: Waiting on bors to run and complete tests. Bors will change the label on completion.

and removed S-waiting-on-review

Status: Awaiting review from the assignee but also interested parties.

labels

Sep 6, 2024

This was referenced

Sep 6, 2024

bors added a commit to rust-lang-ci/rust that referenced this pull request

Sep 7, 2024

…iaskrgr

Rollup of 10 pull requests

Successful merges:

rust-lang#126452 (Implement raw lifetimes and labels ('r#ident))
rust-lang#129555 (stabilize const_float_bits_conv)
rust-lang#129594 (explain the options bootstrap passes to curl)
rust-lang#129677 (Don't build by-move body when async closure is tainted)
rust-lang#129847 (Do not call query to compute coroutine layout for synthetic body of async closure)
rust-lang#129869 (add a few more crashtests)
rust-lang#130009 (rustdoc-search: allow trailing Foo -> arg search)
rust-lang#130046 (str: make as_mut_ptr and as_bytes_mut unstably const)
rust-lang#130047 (Win: Add dbghelp to the list of import libraries)
rust-lang#130059 (Remove the unused llvm-skip-rebuild option from x.py)

r? @ghost @rustbot modify labels: rollup

rust-timer added a commit to rust-lang-ci/rust that referenced this pull request

Sep 8, 2024

Rollup merge of rust-lang#126452 - compiler-errors:raw-lifetimes, r=spastorino

Implement raw lifetimes and labels ('r#ident)

This PR does two things:

Reserve lifetime prefixes, e.g. 'prefix#lt in edition 2021.
Implements raw lifetimes, e.g. 'r#async in edition 2021.

This PR additionally extends the keyword_idents_2024 lint to also check lifetimes.

cc @traviscross r? parser

compiler-errors added the relnotes

Marks issues that should be documented in the release notes of the next release.

label

Sep 8, 2024

mattheww added a commit to mattheww/lexeywan that referenced this pull request

Oct 13, 2024

ehuss mentioned this pull request

Oct 30, 2024

wip-sync pushed a commit to NetBSD/pkgsrc-wip that referenced this pull request

Nov 30, 2024

Pkgsrc changes compared to rust182:

Remove patches related to rust-lang/rust#130110, which is now integrated upstream.
Remove patch to vendor/cc-1.0.79, now integrated in the current vendored cc crate.
Checksum updates.

TODO:

Cross-compilation fails ref. rust-lang/rust#133629

Upstream changes:

Version 1.83.0 (2024-11-28)

Language

[Stabilize &mut, *mut, &Cell, and *const Cell in const.] (rust-lang/rust#129195)
[Allow creating references to statics in const initializers.] (rust-lang/rust#129759)
[Implement raw lifetimes and labels ('r#ident).] (rust-lang/rust#126452)
[Define behavior when atomic and non-atomic reads race.] (rust-lang/rust#128778)
[Non-exhaustive structs may now be empty.] (rust-lang/rust#128934)
[Disallow implicit coercions from places of type !] (rust-lang/rust#129392)
[const extern functions can now be defined for other calling conventions.] (rust-lang/rust#129753)
[Stabilize expr_2021 macro fragment specifier in all editions.] (rust-lang/rust#129972)
[The non_local_definitions lint now fires on less code and warns by default.] (rust-lang/rust#127117)

Compiler

[Deprecate unsound -Csoft-float flag.] (rust-lang/rust#129897)
Add many new tier 3 targets:
- [aarch64_unknown_nto_qnx700] (rust-lang/rust#127897)
- [arm64e-apple-tvos] (rust-lang/rust#130614)
- [armv7-rtems-eabihf] (rust-lang/rust#127021)
- [loongarch64-unknown-linux-ohos] (rust-lang/rust#130750)
- [riscv32-wrs-vxworks and riscv64-wrs-vxworks] (rust-lang/rust#130549)
- [riscv32{e|em|emc}-unknown-none-elf] (rust-lang/rust#130555)
- [x86_64-unknown-hurd-gnu] (rust-lang/rust#128345)
- [x86_64-unknown-trusty] (rust-lang/rust#130453)

Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support.

Libraries

[Implement PartialEq for ExitCode.] (rust-lang/rust#127633)
[Document that catch_unwind can deal with foreign exceptions without UB, although the exact behavior is unspecified.] (rust-lang/rust#128321)
[Implement Default for HashMap/HashSet iterators that don't already have it.] (rust-lang/rust#128711)
[Bump Unicode to version 16.0.0.] (rust-lang/rust#130183)
[Change documentation of ptr::add/sub to not claim equivalence with offset.] (rust-lang/rust#130229).

Stabilized APIs

[BufRead::skip_until] (https://doc.rust-lang.org/stable/std/io/trait.BufRead.html#method.skip_until)
[ControlFlow::break_value] (https://doc.rust-lang.org/stable/core/ops/enum.ControlFlow.html#method.break_value)
[ControlFlow::continue_value] (https://doc.rust-lang.org/stable/core/ops/enum.ControlFlow.html#method.continue_value)
[ControlFlow::map_break] (https://doc.rust-lang.org/stable/core/ops/enum.ControlFlow.html#method.map_break)
[ControlFlow::map_continue] (https://doc.rust-lang.org/stable/core/ops/enum.ControlFlow.html#method.map_continue)
[DebugList::finish_non_exhaustive] (https://doc.rust-lang.org/stable/core/fmt/struct.DebugList.html#method.finish_non_exhaustive)
[DebugMap::finish_non_exhaustive] (https://doc.rust-lang.org/stable/core/fmt/struct.DebugMap.html#method.finish_non_exhaustive)
[DebugSet::finish_non_exhaustive] (https://doc.rust-lang.org/stable/core/fmt/struct.DebugSet.html#method.finish_non_exhaustive)
[DebugTuple::finish_non_exhaustive] (https://doc.rust-lang.org/stable/core/fmt/struct.DebugTuple.html#method.finish_non_exhaustive)
[ErrorKind::ArgumentListTooLong] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.ArgumentListTooLong)
[ErrorKind::Deadlock] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.Deadlock)
[ErrorKind::DirectoryNotEmpty] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.DirectoryNotEmpty)
[ErrorKind::ExecutableFileBusy] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.ExecutableFileBusy)
[ErrorKind::FileTooLarge] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.FileTooLarge)
[ErrorKind::HostUnreachable] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.HostUnreachable)
[ErrorKind::IsADirectory] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.IsADirectory)
[ErrorKind::NetworkDown] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.NetworkDown)
[ErrorKind::NetworkUnreachable] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.NetworkUnreachable)
[ErrorKind::NotADirectory] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.NotADirectory)
[ErrorKind::NotSeekable] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.NotSeekable)
[ErrorKind::ReadOnlyFilesystem] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.ReadOnlyFilesystem)
[ErrorKind::ResourceBusy] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.ResourceBusy)
[ErrorKind::StaleNetworkFileHandle] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.StaleNetworkFileHandle)
[ErrorKind::StorageFull] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.StorageFull)
[ErrorKind::TooManyLinks] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.TooManyLinks)
[Option::get_or_insert_default] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.get_or_insert_default)
[Waker::data] (https://doc.rust-lang.org/stable/core/task/struct.Waker.html#method.data)
[Waker::new] (https://doc.rust-lang.org/stable/core/task/struct.Waker.html#method.new)
[Waker::vtable] (https://doc.rust-lang.org/stable/core/task/struct.Waker.html#method.vtable)
[char::MIN] (https://doc.rust-lang.org/stable/core/primitive.char.html#associatedconstant.MIN)
[hash_map::Entry::insert_entry] (https://doc.rust-lang.org/stable/std/collections/hash_map/enum.Entry.html#method.insert_entry)
[hash_map::VacantEntry::insert_entry] (https://doc.rust-lang.org/stable/std/collections/hash_map/struct.VacantEntry.html#method.insert_entry)

These APIs are now stable in const contexts:

[Cell::into_inner] (https://doc.rust-lang.org/stable/core/cell/struct.Cell.html#method.into_inner)
[Duration::as_secs_f32] (https://doc.rust-lang.org/stable/core/time/struct.Duration.html#method.as_secs_f32)
[Duration::as_secs_f64] (https://doc.rust-lang.org/stable/core/time/struct.Duration.html#method.as_secs_f64)
[Duration::div_duration_f32] (https://doc.rust-lang.org/stable/core/time/struct.Duration.html#method.div_duration_f32)
[Duration::div_duration_f64] (https://doc.rust-lang.org/stable/core/time/struct.Duration.html#method.div_duration_f64)
[MaybeUninit::as_mut_ptr] (https://doc.rust-lang.org/stable/core/mem/union.MaybeUninit.html#method.as_mut_ptr)
[NonNull::as_mut] (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.as_mut)
[NonNull::copy_from] (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.copy_from)
[NonNull::copy_from_nonoverlapping] (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.copy_from_nonoverlapping)
[NonNull::copy_to] (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.copy_to)
[NonNull::copy_to_nonoverlapping] (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.copy_to_nonoverlapping)
[NonNull::slice_from_raw_parts] (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.slice_from_raw_parts)
[NonNull::write] (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.write)
[NonNull::write_bytes] (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.write_bytes)
[NonNull::write_unaligned] (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.write_unaligned)
[OnceCell::into_inner] (https://doc.rust-lang.org/stable/core/cell/struct.OnceCell.html#method.into_inner)
[Option::as_mut] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.as_mut)
[Option::expect] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.expect)
[Option::replace] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.replace)
[Option::take] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.take)
[Option::unwrap] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.unwrap)
[Option::unwrap_unchecked] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.unwrap_unchecked)
[Option::<&_>::copied] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.copied)
[Option::<&mut _>::copied] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.copied-1)
[Option::<Option<_>>::flatten] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.flatten)
[Option::<Result<_, _>>::transpose] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.transpose)
[RefCell::into_inner] (https://doc.rust-lang.org/stable/core/cell/struct.RefCell.html#method.into_inner)
[Result::as_mut] (https://doc.rust-lang.org/stable/core/result/enum.Result.html#method.as_mut)
[Result::<&_, _>::copied] (https://doc.rust-lang.org/stable/core/result/enum.Result.html#method.copied)
[Result::<&mut _, _>::copied] (https://doc.rust-lang.org/stable/core/result/enum.Result.html#method.copied-1)
[Result::<Option<_>, _>::transpose] (https://doc.rust-lang.org/stable/core/result/enum.Result.html#method.transpose)
[UnsafeCell::get_mut] (https://doc.rust-lang.org/stable/core/cell/struct.UnsafeCell.html#method.get_mut)
[UnsafeCell::into_inner] (https://doc.rust-lang.org/stable/core/cell/struct.UnsafeCell.html#method.into_inner)
[array::from_mut] (https://doc.rust-lang.org/stable/core/array/fn.from_mut.html)
[char::encode_utf8] (https://doc.rust-lang.org/stable/core/primitive.char.html#method.encode_utf8)
[{float}::classify] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.classify)
[{float}::is_finite] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.is_finite)
[{float}::is_infinite] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.is_infinite)
[{float}::is_nan] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.is_nan)
[{float}::is_normal] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.is_normal)
[{float}::is_sign_negative] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.is_sign_negative)
[{float}::is_sign_positive] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.is_sign_positive)
[{float}::is_subnormal] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.is_subnormal)
[{float}::from_bits] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.from_bits)
[{float}::from_be_bytes] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.from_be_bytes)
[{float}::from_le_bytes] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.from_le_bytes)
[{float}::from_ne_bytes] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.from_ne_bytes)
[{float}::to_bits] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.to_bits)
[{float}::to_be_bytes] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.to_be_bytes)
[{float}::to_le_bytes] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.to_le_bytes)
[{float}::to_ne_bytes] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.to_ne_bytes)
[mem::replace] (https://doc.rust-lang.org/stable/core/mem/fn.replace.html)
[ptr::replace] (https://doc.rust-lang.org/stable/core/ptr/fn.replace.html)
[ptr::slice_from_raw_parts_mut] (https://doc.rust-lang.org/stable/core/ptr/fn.slice_from_raw_parts_mut.html)
[ptr::write] (https://doc.rust-lang.org/stable/core/ptr/fn.write.html)
[ptr::write_unaligned] (https://doc.rust-lang.org/stable/core/ptr/fn.write_unaligned.html)
[<*const _>::copy_to] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.copy_to)
[<*const _>::copy_to_nonoverlapping] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.copy_to_nonoverlapping)
[<*mut _>::copy_from] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.copy_from)
[<*mut _>::copy_from_nonoverlapping] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.copy_from_nonoverlapping)
[<*mut _>::copy_to] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.copy_to-1)
[<*mut _>::copy_to_nonoverlapping] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.copy_to_nonoverlapping-1)
[<*mut _>::write] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.write)
[<*mut _>::write_bytes] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.write_bytes)
[<*mut _>::write_unaligned] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.write_unaligned)
[slice::from_mut] (https://doc.rust-lang.org/stable/core/slice/fn.from_mut.html)
[slice::from_raw_parts_mut] (https://doc.rust-lang.org/stable/core/slice/fn.from_raw_parts_mut.html)
[<[_]>::first_mut] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.first_mut)
[<[_]>::last_mut] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.last_mut)
[<[_]>::first_chunk_mut] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.first_chunk_mut)
[<[_]>::last_chunk_mut] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.last_chunk_mut)
[<[_]>::split_at_mut] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.split_at_mut)
[<[_]>::split_at_mut_checked] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.split_at_mut_checked)
[<[_]>::split_at_mut_unchecked] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.split_at_mut_unchecked)
[<[_]>::split_first_mut] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.split_first_mut)
[<[_]>::split_last_mut] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.split_last_mut)
[<[_]>::split_first_chunk_mut] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.split_first_chunk_mut)
[<[_]>::split_last_chunk_mut] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.split_last_chunk_mut)
[str::as_bytes_mut] (https://doc.rust-lang.org/stable/core/primitive.str.html#method.as_bytes_mut)
[str::as_mut_ptr] (https://doc.rust-lang.org/stable/core/primitive.str.html#method.as_mut_ptr)
[str::from_utf8_unchecked_mut] (https://doc.rust-lang.org/stable/core/str/fn.from_utf8_unchecked_mut.html)

Cargo

[Introduced a new CARGO_MANIFEST_PATH environment variable, similar to CARGO_MANIFEST_DIR but pointing directly to the manifest file.] (rust-lang/cargo#14404)
[Added package.autolib to the manifest, allowing [lib] auto-discovery to be disabled.] (rust-lang/cargo#14591)
[Declare support level for each crate in Cargo's Charter / crate docs.] (rust-lang/cargo#14600)
[Declare new Intentional Artifacts as 'small' changes.] (rust-lang/cargo#14599)

Rustdoc

[The sidebar / hamburger menu table of contents now includes the # headers from the main item's doc comment] (rust-lang/rust#120736). This is similar to a third-party feature provided by the rustdoc-search-enhancements browser extension.

Compatibility Notes

[Warn against function pointers using unsupported ABI strings.] (rust-lang/rust#128784)
[Check well-formedness of the source type's signature in fn pointer casts.] (rust-lang/rust#129021) This partly closes a soundness hole that comes when casting a function item to function pointer
[Use equality instead of subtyping when resolving type dependent paths.] (rust-lang/rust#129073)
Linking on macOS now correctly includes Rust's default deployment target. Due to a linker bug, you might have to pass MACOSX_DEPLOYMENT_TARGET or fix your #[link] attributes to point to the correct frameworks. See <rust-lang/rust#129369>.
[Rust will now correctly raise an error for repr(Rust) written on non-struct/enum/union items, since it previous did not have any effect.] (rust-lang/rust#129422)
The future incompatibility lint deprecated_cfg_attr_crate_type_name [has been made into a hard error] (rust-lang/rust#129670). It was used to deny usage of #![crate_type] and #![crate_name] attributes in #![cfg_attr], which required a hack in the compiler to be able to change the used crate type and crate name after cfg expansion. Users can use --crate-type instead of #![cfg_attr(..., crate_type = "...")] and --crate-name instead of #![cfg_attr(..., crate_name = "...")] when running rustc/cargo rustc on the command line. Use of those two attributes outside of #![cfg_attr] continue to be fully supported.
Until now, paths into the sysroot were always prefixed with /rustc/$hash in diagnostics, codegen, backtrace, e.g.
```
thread 'main' panicked at 'hello world', map-panic.rs:2:50
stack backtrace:
   0: std::panicking::begin_panic
             at /rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/std/src/panicking.rs:616:12
   1: map_panic::main::{{closure}}
             at ./map-panic.rs:2:50
   2: core::option::Option<T>::map
             at /rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/core/src/option.rs:929:29
   3: map_panic::main
             at ./map-panic.rs:2:30
   4: core::ops::function::FnOnce::call_once
             at /rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/core/src/ops/function.rs:248:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
```
[RFC 3127 said] (https://rust-lang.github.io/rfcs/3127-trim-paths.html#changing-handling-of-sysroot-path-in-rustc)

We want to change this behaviour such that, when rust-src source files can be discovered, the virtual path is discarded and therefore the local path will be embedded, unless there is a --remap-path-prefix that causes this local path to be remapped in the usual way.

#129687 implements this behaviour, when rust-src is present at compile time, rustc replaces /rustc/$hash with a real path into the local rust-src component with best effort. To sanitize this, users must explicitly supply --remap-path-prefix=<path to rust-src>=foo or not have the rust-src component installed.
The allow-by-default missing_docs lint used to disable itself when invoked through rustc --test/cargo test, resulting in #[expect(missing_docs)] emitting false positives due to the expectation being wrongly unfulfilled. This behavior [has now been removed] (rust-lang/rust#130025), which allows #[expect(missing_docs)] to be fulfilled in all scenarios, but will also report new missing_docs diagnostics for publicly reachable #[cfg(test)] items, [integration test] (https://doc.rust-lang.org/cargo/reference/cargo-targets.html#integration-tests) crate-level documentation, and publicly reachable items in integration tests.
[The armv8r-none-eabihf target now uses the Armv8-R required set of floating-point features.] (rust-lang/rust#130295)
[Fix a soundness bug where rustc wouldn't detect unconstrained higher-ranked lifetimes in a dyn Trait's associated types that occur due to supertraits.] (rust-lang/rust#130367)
[Update the minimum external LLVM version to 18.] (rust-lang/rust#130487)
[Remove aarch64-fuchsia and x86_64-fuchsia target aliases in favor of aarch64-unknown-fuchsia and x86_64-unknown-fuchsia respectively.] (rust-lang/rust#130657)
[The ABI-level exception class of a Rust panic is now encoded with native-endian bytes, so it is legible in hex dumps.] (rust-lang/rust#130897)
[Visual Studio 2013 is no longer supported for MSVC targets.] (rust-lang/rust#131070)
[The sysroot no longer contains the std dynamic library in its top-level lib/ dir.] (rust-lang/rust#131188)

tmeijn pushed a commit to tmeijn/dotfiles that referenced this pull request

Dec 5, 2024

This MR contains the following updates:

Package	Update	Change
rust	minor	`1.82.0` -> `1.83.0`

MR created with the help of el-capitano/tools/renovate-bot.

Proposed changes to behavior should be submitted there as MRs.

Release Notes

rust-lang/rust (rust)

`v1.83.0`

Compare Source

==========================

Language

Compiler

Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support.

Libraries

Stabilized APIs

These APIs are now stable in const contexts:

Cargo

Rustdoc

The sidebar / hamburger menu table of contents now includes the # headers from the main item's doc comment. This is similar to a third-party feature provided by the rustdoc-search-enhancements browser extension.

Compatibility Notes

Warn against function pointers using unsupported ABI strings.
Check well-formedness of the source type's signature in fn pointer casts. This partly closes a soundness hole that comes when casting a function item to function pointer
Use equality instead of subtyping when resolving type dependent paths.
Linking on macOS now correctly includes Rust's default deployment target. Due to a linker bug, you might have to pass MACOSX_DEPLOYMENT_TARGET or fix your #[link] attributes to point to the correct frameworks. See #129369.
Rust will now correctly raise an error for repr(Rust) written on non-struct/enum/union items, since it previous did not have any effect.
The future incompatibility lint deprecated_cfg_attr_crate_type_name has been made into a hard error. It was used to deny usage of #![crate_type] and #![crate_name] attributes in #![cfg_attr], which required a hack in the compiler to be able to change the used crate type and crate name after cfg expansion. Users can use --crate-type instead of #![cfg_attr(..., crate_type = "...")] and --crate-name instead of #![cfg_attr(..., crate_name = "...")] when running rustc/cargo rustc on the command line. Use of those two attributes outside of #![cfg_attr] continue to be fully supported.

Until now, paths into the sysroot were always prefixed with /rustc/$hash in diagnostics, codegen, backtrace, e.g.

thread 'main' panicked at 'hello world', map-panic.rs:2:50
stack backtrace:
   0: std::panicking::begin_panic
             at /rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/std/src/panicking.rs:616:12
   1: map_panic::main::{{closure}}
             at ./map-panic.rs:2:50
   2: core::option::Option<T>::map
             at /rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/core/src/option.rs:929:29
   3: map_panic::main
             at ./map-panic.rs:2:30
   4: core::ops::function::FnOnce::call_once
             at /rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/core/src/ops/function.rs:248:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

RFC 3127 said

We want to change this behaviour such that, when rust-src source files can be discovered, the virtual path is discarded and therefore the local path will be embedded, unless there is a --remap-path-prefix that causes this local path to be remapped in the usual way.

#129687 implements this behaviour, when rust-src is present at compile time, rustc replaces /rustc/$hash with a real path into the local rust-src component with best effort. To sanitize this, users must explicitly supply --remap-path-prefix=<path to rust-src>=foo or not have the rust-src component installed.

The allow-by-default missing_docs lint used to disable itself when invoked through rustc --test/cargo test, resulting in #[expect(missing_docs)] emitting false positives due to the expectation being wrongly unfulfilled. This behavior has now been removed, which allows #[expect(missing_docs)] to be fulfilled in all scenarios, but will also report new missing_docs diagnostics for publicly reachable #[cfg(test)] items, integration test crate-level documentation, and publicly reachable items in integration tests.
The armv8r-none-eabihf target now uses the Armv8-R required set of floating-point features.
Fix a soundness bug where rustc wouldn't detect unconstrained higher-ranked lifetimes in a dyn Trait's associated types that occur due to supertraits.
Update the minimum external LLVM version to 18.
Remove aarch64-fuchsia and x86_64-fuchsia target aliases in favor of aarch64-unknown-fuchsia and x86_64-unknown-fuchsia respectively.
The ABI-level exception class of a Rust panic is now encoded with native-endian bytes, so it is legible in hex dumps.
Visual Studio 2013 is no longer supported for MSVC targets.
The sysroot no longer contains the std dynamic library in its top-level lib/ dir.

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever MR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this MR and you won't be reminded about this update again.

If you want to rebase/retry this MR, check this box

This MR has been generated by Renovate Bot.

Veykril added a commit to rust-lang/fls that referenced this pull request

Dec 9, 2024

Veykril added a commit to rust-lang/fls that referenced this pull request

Dec 9, 2024

Veykril added a commit to rust-lang/fls that referenced this pull request

Dec 10, 2024

tshepang pushed a commit to ferrocene/ferrocene that referenced this pull request

Dec 18, 2024

netbsd-srcmastr pushed a commit to NetBSD/pkgsrc that referenced this pull request

Feb 24, 2025

Pkgsrc changes:

Introduce use of TOOL* settings.
On NetBSD, use patchelf in the install phase to fix up RPATHs.
Reduce verbosity by dropping -v flag to x.py invocations.
Remove patches related to rust-lang/rust#130110, which is now integrated upstream.
Remove patch to vendor/cc-1.0.79, now integrated in the current vendored cc crate.
Checksum updates.

Upstream changes:

Version 1.83.0 (2024-11-28)

Language

[Stabilize &mut, *mut, &Cell, and *const Cell in const.] (rust-lang/rust#129195)
[Allow creating references to statics in const initializers.] (rust-lang/rust#129759)
[Implement raw lifetimes and labels ('r#ident).] (rust-lang/rust#126452)
[Define behavior when atomic and non-atomic reads race.] (rust-lang/rust#128778)
[Non-exhaustive structs may now be empty.] (rust-lang/rust#128934)
[Disallow implicit coercions from places of type !] (rust-lang/rust#129392)
[const extern functions can now be defined for other calling conventions.] (rust-lang/rust#129753)
[Stabilize expr_2021 macro fragment specifier in all editions.] (rust-lang/rust#129972)
[The non_local_definitions lint now fires on less code and warns by default.] (rust-lang/rust#127117)

Compiler

[Deprecate unsound -Csoft-float flag.] (rust-lang/rust#129897)
Add many new tier 3 targets:
- [aarch64_unknown_nto_qnx700] (rust-lang/rust#127897)
- [arm64e-apple-tvos] (rust-lang/rust#130614)
- [armv7-rtems-eabihf] (rust-lang/rust#127021)
- [loongarch64-unknown-linux-ohos] (rust-lang/rust#130750)
- [riscv32-wrs-vxworks and riscv64-wrs-vxworks] (rust-lang/rust#130549)
- [riscv32{e|em|emc}-unknown-none-elf] (rust-lang/rust#130555)
- [x86_64-unknown-hurd-gnu] (rust-lang/rust#128345)
- [x86_64-unknown-trusty] (rust-lang/rust#130453)

Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support.

Libraries

[Implement PartialEq for ExitCode.] (rust-lang/rust#127633)
[Document that catch_unwind can deal with foreign exceptions without UB, although the exact behavior is unspecified.] (rust-lang/rust#128321)
[Implement Default for HashMap/HashSet iterators that don't already have it.] (rust-lang/rust#128711)
[Bump Unicode to version 16.0.0.] (rust-lang/rust#130183)
[Change documentation of ptr::add/sub to not claim equivalence with offset.] (rust-lang/rust#130229).

Stabilized APIs

[BufRead::skip_until] (https://doc.rust-lang.org/stable/std/io/trait.BufRead.html#method.skip_until)
[ControlFlow::break_value] (https://doc.rust-lang.org/stable/core/ops/enum.ControlFlow.html#method.break_value)
[ControlFlow::continue_value] (https://doc.rust-lang.org/stable/core/ops/enum.ControlFlow.html#method.continue_value)
[ControlFlow::map_break] (https://doc.rust-lang.org/stable/core/ops/enum.ControlFlow.html#method.map_break)
[ControlFlow::map_continue] (https://doc.rust-lang.org/stable/core/ops/enum.ControlFlow.html#method.map_continue)
[DebugList::finish_non_exhaustive] (https://doc.rust-lang.org/stable/core/fmt/struct.DebugList.html#method.finish_non_exhaustive)
[DebugMap::finish_non_exhaustive] (https://doc.rust-lang.org/stable/core/fmt/struct.DebugMap.html#method.finish_non_exhaustive)
[DebugSet::finish_non_exhaustive] (https://doc.rust-lang.org/stable/core/fmt/struct.DebugSet.html#method.finish_non_exhaustive)
[DebugTuple::finish_non_exhaustive] (https://doc.rust-lang.org/stable/core/fmt/struct.DebugTuple.html#method.finish_non_exhaustive)
[ErrorKind::ArgumentListTooLong] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.ArgumentListTooLong)
[ErrorKind::Deadlock] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.Deadlock)
[ErrorKind::DirectoryNotEmpty] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.DirectoryNotEmpty)
[ErrorKind::ExecutableFileBusy] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.ExecutableFileBusy)
[ErrorKind::FileTooLarge] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.FileTooLarge)
[ErrorKind::HostUnreachable] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.HostUnreachable)
[ErrorKind::IsADirectory] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.IsADirectory)
[ErrorKind::NetworkDown] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.NetworkDown)
[ErrorKind::NetworkUnreachable] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.NetworkUnreachable)
[ErrorKind::NotADirectory] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.NotADirectory)
[ErrorKind::NotSeekable] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.NotSeekable)
[ErrorKind::ReadOnlyFilesystem] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.ReadOnlyFilesystem)
[ErrorKind::ResourceBusy] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.ResourceBusy)
[ErrorKind::StaleNetworkFileHandle] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.StaleNetworkFileHandle)
[ErrorKind::StorageFull] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.StorageFull)
[ErrorKind::TooManyLinks] (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.TooManyLinks)
[Option::get_or_insert_default] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.get_or_insert_default)
[Waker::data] (https://doc.rust-lang.org/stable/core/task/struct.Waker.html#method.data)
[Waker::new] (https://doc.rust-lang.org/stable/core/task/struct.Waker.html#method.new)
[Waker::vtable] (https://doc.rust-lang.org/stable/core/task/struct.Waker.html#method.vtable)
[char::MIN] (https://doc.rust-lang.org/stable/core/primitive.char.html#associatedconstant.MIN)
[hash_map::Entry::insert_entry] (https://doc.rust-lang.org/stable/std/collections/hash_map/enum.Entry.html#method.insert_entry)
[hash_map::VacantEntry::insert_entry] (https://doc.rust-lang.org/stable/std/collections/hash_map/struct.VacantEntry.html#method.insert_entry)

These APIs are now stable in const contexts:

[Cell::into_inner] (https://doc.rust-lang.org/stable/core/cell/struct.Cell.html#method.into_inner)
[Duration::as_secs_f32] (https://doc.rust-lang.org/stable/core/time/struct.Duration.html#method.as_secs_f32)
[Duration::as_secs_f64] (https://doc.rust-lang.org/stable/core/time/struct.Duration.html#method.as_secs_f64)
[Duration::div_duration_f32] (https://doc.rust-lang.org/stable/core/time/struct.Duration.html#method.div_duration_f32)
[Duration::div_duration_f64] (https://doc.rust-lang.org/stable/core/time/struct.Duration.html#method.div_duration_f64)
[MaybeUninit::as_mut_ptr] (https://doc.rust-lang.org/stable/core/mem/union.MaybeUninit.html#method.as_mut_ptr)
[NonNull::as_mut] (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.as_mut)
[NonNull::copy_from] (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.copy_from)
[NonNull::copy_from_nonoverlapping] (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.copy_from_nonoverlapping)
[NonNull::copy_to] (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.copy_to)
[NonNull::copy_to_nonoverlapping] (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.copy_to_nonoverlapping)
[NonNull::slice_from_raw_parts] (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.slice_from_raw_parts)
[NonNull::write] (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.write)
[NonNull::write_bytes] (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.write_bytes)
[NonNull::write_unaligned] (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.write_unaligned)
[OnceCell::into_inner] (https://doc.rust-lang.org/stable/core/cell/struct.OnceCell.html#method.into_inner)
[Option::as_mut] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.as_mut)
[Option::expect] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.expect)
[Option::replace] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.replace)
[Option::take] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.take)
[Option::unwrap] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.unwrap)
[Option::unwrap_unchecked] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.unwrap_unchecked)
[Option::<&_>::copied] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.copied)
[Option::<&mut _>::copied] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.copied-1)
[Option::<Option<_>>::flatten] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.flatten)
[Option::<Result<_, _>>::transpose] (https://doc.rust-lang.org/stable/core/option/enum.Option.html#method.transpose)
[RefCell::into_inner] (https://doc.rust-lang.org/stable/core/cell/struct.RefCell.html#method.into_inner)
[Result::as_mut] (https://doc.rust-lang.org/stable/core/result/enum.Result.html#method.as_mut)
[Result::<&_, _>::copied] (https://doc.rust-lang.org/stable/core/result/enum.Result.html#method.copied)
[Result::<&mut _, _>::copied] (https://doc.rust-lang.org/stable/core/result/enum.Result.html#method.copied-1)
[Result::<Option<_>, _>::transpose] (https://doc.rust-lang.org/stable/core/result/enum.Result.html#method.transpose)
[UnsafeCell::get_mut] (https://doc.rust-lang.org/stable/core/cell/struct.UnsafeCell.html#method.get_mut)
[UnsafeCell::into_inner] (https://doc.rust-lang.org/stable/core/cell/struct.UnsafeCell.html#method.into_inner)
[array::from_mut] (https://doc.rust-lang.org/stable/core/array/fn.from_mut.html)
[char::encode_utf8] (https://doc.rust-lang.org/stable/core/primitive.char.html#method.encode_utf8)
[{float}::classify] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.classify)
[{float}::is_finite] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.is_finite)
[{float}::is_infinite] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.is_infinite)
[{float}::is_nan] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.is_nan)
[{float}::is_normal] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.is_normal)
[{float}::is_sign_negative] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.is_sign_negative)
[{float}::is_sign_positive] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.is_sign_positive)
[{float}::is_subnormal] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.is_subnormal)
[{float}::from_bits] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.from_bits)
[{float}::from_be_bytes] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.from_be_bytes)
[{float}::from_le_bytes] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.from_le_bytes)
[{float}::from_ne_bytes] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.from_ne_bytes)
[{float}::to_bits] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.to_bits)
[{float}::to_be_bytes] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.to_be_bytes)
[{float}::to_le_bytes] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.to_le_bytes)
[{float}::to_ne_bytes] (https://doc.rust-lang.org/stable/core/primitive.f64.html#method.to_ne_bytes)
[mem::replace] (https://doc.rust-lang.org/stable/core/mem/fn.replace.html)
[ptr::replace] (https://doc.rust-lang.org/stable/core/ptr/fn.replace.html)
[ptr::slice_from_raw_parts_mut] (https://doc.rust-lang.org/stable/core/ptr/fn.slice_from_raw_parts_mut.html)
[ptr::write] (https://doc.rust-lang.org/stable/core/ptr/fn.write.html)
[ptr::write_unaligned] (https://doc.rust-lang.org/stable/core/ptr/fn.write_unaligned.html)
[<*const _>::copy_to] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.copy_to)
[<*const _>::copy_to_nonoverlapping] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.copy_to_nonoverlapping)
[<*mut _>::copy_from] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.copy_from)
[<*mut _>::copy_from_nonoverlapping] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.copy_from_nonoverlapping)
[<*mut _>::copy_to] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.copy_to-1)
[<*mut _>::copy_to_nonoverlapping] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.copy_to_nonoverlapping-1)
[<*mut _>::write] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.write)
[<*mut _>::write_bytes] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.write_bytes)
[<*mut _>::write_unaligned] (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.write_unaligned)
[slice::from_mut] (https://doc.rust-lang.org/stable/core/slice/fn.from_mut.html)
[slice::from_raw_parts_mut] (https://doc.rust-lang.org/stable/core/slice/fn.from_raw_parts_mut.html)
[<[_]>::first_mut] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.first_mut)
[<[_]>::last_mut] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.last_mut)
[<[_]>::first_chunk_mut] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.first_chunk_mut)
[<[_]>::last_chunk_mut] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.last_chunk_mut)
[<[_]>::split_at_mut] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.split_at_mut)
[<[_]>::split_at_mut_checked] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.split_at_mut_checked)
[<[_]>::split_at_mut_unchecked] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.split_at_mut_unchecked)
[<[_]>::split_first_mut] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.split_first_mut)
[<[_]>::split_last_mut] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.split_last_mut)
[<[_]>::split_first_chunk_mut] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.split_first_chunk_mut)
[<[_]>::split_last_chunk_mut] (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.split_last_chunk_mut)
[str::as_bytes_mut] (https://doc.rust-lang.org/stable/core/primitive.str.html#method.as_bytes_mut)
[str::as_mut_ptr] (https://doc.rust-lang.org/stable/core/primitive.str.html#method.as_mut_ptr)
[str::from_utf8_unchecked_mut] (https://doc.rust-lang.org/stable/core/str/fn.from_utf8_unchecked_mut.html)

Cargo

[Introduced a new CARGO_MANIFEST_PATH environment variable, similar to CARGO_MANIFEST_DIR but pointing directly to the manifest file.] (rust-lang/cargo#14404)
[Added package.autolib to the manifest, allowing [lib] auto-discovery to be disabled.] (rust-lang/cargo#14591)
[Declare support level for each crate in Cargo's Charter / crate docs.] (rust-lang/cargo#14600)
[Declare new Intentional Artifacts as 'small' changes.] (rust-lang/cargo#14599)

Rustdoc

[The sidebar / hamburger menu table of contents now includes the # headers from the main item's doc comment] (rust-lang/rust#120736). This is similar to a third-party feature provided by the rustdoc-search-enhancements browser extension.

Compatibility Notes

[Warn against function pointers using unsupported ABI strings.] (rust-lang/rust#128784)
[Check well-formedness of the source type's signature in fn pointer casts.] (rust-lang/rust#129021) This partly closes a soundness hole that comes when casting a function item to function pointer
[Use equality instead of subtyping when resolving type dependent paths.] (rust-lang/rust#129073)
Linking on macOS now correctly includes Rust's default deployment target. Due to a linker bug, you might have to pass MACOSX_DEPLOYMENT_TARGET or fix your #[link] attributes to point to the correct frameworks. See <rust-lang/rust#129369>.
[Rust will now correctly raise an error for repr(Rust) written on non-struct/enum/union items, since it previous did not have any effect.] (rust-lang/rust#129422)
The future incompatibility lint deprecated_cfg_attr_crate_type_name [has been made into a hard error] (rust-lang/rust#129670). It was used to deny usage of #![crate_type] and #![crate_name] attributes in #![cfg_attr], which required a hack in the compiler to be able to change the used crate type and crate name after cfg expansion. Users can use --crate-type instead of #![cfg_attr(..., crate_type = "...")] and --crate-name instead of #![cfg_attr(..., crate_name = "...")] when running rustc/cargo rustc on the command line. Use of those two attributes outside of #![cfg_attr] continue to be fully supported.
Until now, paths into the sysroot were always prefixed with /rustc/$hash in diagnostics, codegen, backtrace, e.g.
```
thread 'main' panicked at 'hello world', map-panic.rs:2:50
stack backtrace:
   0: std::panicking::begin_panic
             at /rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/std/src/panicking.rs:616:12
   1: map_panic::main::{{closure}}
             at ./map-panic.rs:2:50
   2: core::option::Option<T>::map
             at /rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/core/src/option.rs:929:29
   3: map_panic::main
             at ./map-panic.rs:2:30
   4: core::ops::function::FnOnce::call_once
             at /rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/core/src/ops/function.rs:248:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
```
[RFC 3127 said] (https://rust-lang.github.io/rfcs/3127-trim-paths.html#changing-handling-of-sysroot-path-in-rustc)

We want to change this behaviour such that, when rust-src source files can be discovered, the virtual path is discarded and therefore the local path will be embedded, unless there is a --remap-path-prefix that causes this local path to be remapped in the usual way.

#129687 implements this behaviour, when rust-src is present at compile time, rustc replaces /rustc/$hash with a real path into the local rust-src component with best effort. To sanitize this, users must explicitly supply --remap-path-prefix=<path to rust-src>=foo or not have the rust-src component installed.
The allow-by-default missing_docs lint used to disable itself when invoked through rustc --test/cargo test, resulting in #[expect(missing_docs)] emitting false positives due to the expectation being wrongly unfulfilled. This behavior [has now been removed] (rust-lang/rust#130025), which allows #[expect(missing_docs)] to be fulfilled in all scenarios, but will also report new missing_docs diagnostics for publicly reachable #[cfg(test)] items, [integration test] (https://doc.rust-lang.org/cargo/reference/cargo-targets.html#integration-tests) crate-level documentation, and publicly reachable items in integration tests.
[The armv8r-none-eabihf target now uses the Armv8-R required set of floating-point features.] (rust-lang/rust#130295)
[Fix a soundness bug where rustc wouldn't detect unconstrained higher-ranked lifetimes in a dyn Trait's associated types that occur due to supertraits.] (rust-lang/rust#130367)
[Update the minimum external LLVM version to 18.] (rust-lang/rust#130487)
[Remove aarch64-fuchsia and x86_64-fuchsia target aliases in favor of aarch64-unknown-fuchsia and x86_64-unknown-fuchsia respectively.] (rust-lang/rust#130657)
[The ABI-level exception class of a Rust panic is now encoded with native-endian bytes, so it is legible in hex dumps.] (rust-lang/rust#130897)
[Visual Studio 2013 is no longer supported for MSVC targets.] (rust-lang/rust#131070)
[The sysroot no longer contains the std dynamic library in its top-level lib/ dir.] (rust-lang/rust#131188)

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Implement raw lifetimes and labels ('r#ident) by compiler-errors · Pull Request #126452 · rust-lang/rust (original) (raw)

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Version 1.83.0 (2024-11-28)

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Version 1.83.0 (2024-11-28)

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Implement raw lifetimes and labels (`'r#ident`) by compiler-errors · Pull Request #126452 · rust-lang/rust (original) (raw)

`v1.83.0`