Check elaborated projections from dyn don't mention unconstrained late bound lifetimes by compiler-errors · Pull Request #130367 · rust-lang/rust (original) (raw)

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Sep 14, 2024

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

Sep 14, 2024

… r=

Check elaborated projections from dyn don't mention unconstrained late bound lifetimes

Check that the projections that are not explicitly written but which we deduce from elaborating the principal of a dyn also do not reference unconstrained late-bound lifetimes, just like the ones that the user writes by hand.

Fixes rust-lang#130347

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

Sep 14, 2024

[CRATER] Crater rollup

This is a crater rollup of:

What is a crater rollup? It's simply a (manually set-up) crater job that is run on all of the containing PRs together, and then we can set the crates list for each of these jobs to just the list of failures after it's done. It should cut out on the bulk of "normal" crates that do nothing and simply just waste time to build without being affected by the union of all of these changes.

After this is finished, I will adjust all of the jobs to use only the list of failed crates. That should significantly speed up these jobs from taking like ~6 days to taking ~2. See the last time I did this: rust-lang#129660.

Given that rust-lang#130285 is running in build-and-test mode, let's run all of them in build-and-test mode.

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.

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Oct 4, 2024

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

Oct 5, 2024

…kingjubilee

Rollup of 9 pull requests

Successful merges:

rust-lang#129517 (Compute array length from type for unconditional panic lint. )
rust-lang#130367 (Check elaborated projections from dyn don't mention unconstrained late bound lifetimes)
rust-lang#130403 (Stabilize const_slice_from_raw_parts_mut)
rust-lang#130633 (Add support for reborrowing pinned method receivers)
rust-lang#131105 (update Literal's intro)
rust-lang#131194 (Fix needless_lifetimes in stable_mir)
rust-lang#131260 (rustdoc: cleaner errors on disambiguator/namespace mismatches)
rust-lang#131267 (Stabilize BufRead::skip_until)
rust-lang#131273 (Account for impl Trait { when impl Trait for Type { was intended)

r? @ghost @rustbot modify labels: rollup

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

Oct 5, 2024

Rollup merge of rust-lang#130367 - compiler-errors:super-unconstrained, r=spastorino

Check elaborated projections from dyn don't mention unconstrained late bound lifetimes

That is to say, given:

trait Foo<T>: Bar<Assoc = T> {}

trait Bar {
    type Assoc;
}

The type dyn for<'a> Foo<&'a T> (basically) elaborates to dyn for<'a> Foo<&'a T> + for<'a> Bar<Assoc = &'a T>[^1]. However, the Bar projection predicate is not well-formed, since 'a must show up in the trait's arguments to be referenced in the term of a projection. We must error in this situation[^well], or else dyn for<'a> Foo<&'a T> is unsound.

We already detect this for user-written projections during HIR->rustc_middle conversion, so this largely replicates that logic using the helper functions that were already conveniently defined.

I'm cratering this first to see the fallout; if it's minimal or zero, then let's land it as-is. If not, the way that this is implemented is very conducive to an FCW.

Fixes rust-lang#130347

[^1]: We don't actually elaborate it like that in rustc; we only keep the principal trait ref Foo<&'a T> and the projection part of Bar<Assoc = ...>, but it's useful to be a bit verbose here for the purpose of explaining the issue. [^well]: Well, we could also make dyn for<'a> Foo<&'a T> not implement for<'a> Bar<Assoc = &'a T>, but this is inconsistent with the case where the user writes Assoc = ... in the type itself, and it overly complicates the implementation of trait objects' built-in impls.

Mark-Simulacrum added the relnotes

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

label

Nov 22, 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.

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)