Rollup of 10 pull requests
Successful merges:
- #117910 (Refactor uses of `objc_msgSend` to no longer have clashing definitions)
- #118639 (Undeprecate lint `unstable_features` and make use of it in the compiler)
- #119801 (Fix deallocation with wrong allocator in (A)Rc::from_box_in)
- #120058 (bootstrap: improvements for compiler builds)
- #120059 (Make generic const type mismatches not hide trait impls from the trait solver)
- #120097 (Report unreachable subpatterns consistently)
- #120137 (Validate AggregateKind types in MIR)
- #120164 (`maybe_lint_impl_trait`: separate `is_downgradable` from `is_object_safe`)
- #120181 (Allow any `const` expression blocks in `thread_local!`)
- #120218 (rustfmt: Check that a token can begin a nonterminal kind before parsing it as a macro arg)
r? `@ghost`
`@rustbot` modify labels: rollup
`maybe_lint_impl_trait`: separate `is_downgradable` from `is_object_safe`
https://github.com/rust-lang/rust/pull/119752 leveraged and overloaded `is_object_safe` to prevent an ICE, but accurate object safety information is needed for precise suggestions. This separates out `is_downgradable`, used for the ICE prevention, and `is_object_safe`, which returns to its original meaning.
Report unreachable subpatterns consistently
We weren't reporting unreachable subpatterns in function arguments and `let` expressions. This wasn't very important, but never patterns make it more relevant: a user might write `let (Ok(x) | Err(!)) = ...` in a case where `let Ok(x) = ...` is accepted, so we should report the `Err(!)` as redundant.
r? ```@compiler-errors```
Make generic const type mismatches not hide trait impls from the trait solver
pulled out of https://github.com/rust-lang/rust/pull/119895
It does improve diagnostics somewhat, but also causes some extraneous diagnostics in potentially misleading order.
The issue was that a const type mismatch, instead of reporting an error, would silently poison the constant, only for that information to be thrown away and the impl to be treated as "not matching". In #119895 this would cause ICEs as well as errors on impls stating that the impl needs to exist for itself to be valid.
Don't actually make bound ty/const for RTN
Avoid creating an unnecessary non-lifetime binder when we do RTN on a method that has ty/const params.
Fixes#120208
r? oli-obk
add help message for `exclusive_range_pattern` error
Fixes#120047
this error
```
error[E0658]: exclusive range pattern syntax is experimental
--> src/lib.rs:3:9
|
3 | 0..42 => {},
| ^^^^^
|
= note: see issue #37854 <https://github.com/rust-lang/rust/issues/37854> for more information
= help: use an inclusive range pattern, like N..=M
```
now includes a help message
Not sure of proper procedure here but this seemed like a good help message (used the one suggested in the original issue), if you have a idea for one that is better or something I missed please comment!
exclude unexported macro bindings from extern crate
Fixes#119301
Macros that aren't exported from an external crate should not be defined.
r? ``@petrochenkov``
Remove special handling of `box` expressions from parser
#108471 added a temporary hack to parse `box expr`. It's been almost a year since then, so I think it's safe to remove the special handling.
As a drive-by cleanup, move `parser/removed-syntax*` tests to their own directory.
`single_use_lifetimes`: Don't suggest deleting lifetimes with bounds
Closes#117965
```
9 | pub fn get<'b: 'a>(&'b self) -> &'a str {
| ^^ -- ...is used only here
| |
| this lifetime...
```
In this example, I think the `&'b self` can be replaced with the bound itself, yielding `&'a self`, but this would require a deeper refactor. Happy to do as a follow-on PR if desired.
Avoid ICEs in trait names without `dyn`
Check diagnostic is error before downgrading. Fix#119633.
Account for traits using self-trait by name without `dyn`. Fix#119652.
Stabilize single-field offset_of
This PR stabilizes offset_of for a single field. There has been some further discussion at https://github.com/rust-lang/rust/issues/106655 about whether this is advisable; I'm opening the PR anyway so that the code is available.
Suggest `.swap()` when encountering conflicting borrows from `mem::swap` on a slice
This PR modifies the existing suggestion by matching on `[ProjectionElem::Deref, ProjectionElem::Index(_)]` instead of just `[ProjectionElem::Index(_)]`, which caused us to miss many cases. Additionally, it adds a more specific, machine-applicable suggestion in the case we determine `mem::swap` was used to swap elements in a slice.
Closes#102269
never_patterns: typecheck never patterns
This checks that a `!` pattern is only used on an uninhabited type (modulo match ergonomics, i.e. `!` is allowed on `&Void`).
r? `@compiler-errors`
Change return type of unstable `Waker::noop()` from `Waker` to `&Waker`.
The advantage of this is that it does not need to be assigned to a variable to be used in a `Context` creation, which is the most common thing to want to do with a noop waker. It also avoids unnecessarily executing the dynamically dispatched drop function when the noop waker is dropped.
If an owned noop waker is desired, it can be created by cloning, but the reverse is harder to do since it requires declaring a constant. Alternatively, both versions could be provided, like `futures::task::noop_waker()` and `futures::task::noop_waker_ref()`, but that seems to me to be API clutter for a very small benefit, whereas having the `&'static` reference available is a large reduction in boilerplate.
[Previous discussion on the tracking issue starting here](https://github.com/rust-lang/rust/issues/98286#issuecomment-1862159766)
use implied bounds compat mode in MIR borrowck
cc
- #119956
- #118553
This should hopefully fix bevy 🤔 `cargo test` ends up freezing my computer though, cargo build went from err to ok however 😁
r? `@jackh726`
Rollup of 10 pull requests
Successful merges:
- #118665 (Consolidate all associated items on the NonZero integer types into a single impl block per type)
- #118798 (Use AtomicU8 instead of AtomicUsize in backtrace.rs)
- #119062 (Deny braced macro invocations in let-else)
- #119138 (Docs: Use non-SeqCst in module example of atomics)
- #119907 (Update `fn()` trait implementation docs)
- #120083 (Warn when not having a profiler runtime means that coverage tests won't be run/blessed)
- #120107 (dead_code treats #[repr(transparent)] the same as #[repr(C)])
- #120110 (Update documentation for Vec::into_boxed_slice to be more clear about excess capacity)
- #120113 (Remove myself from review rotation)
- #120118 (Fix typo in documentation in base.rs)
r? `@ghost`
`@rustbot` modify labels: rollup
dead_code treats #[repr(transparent)] the same as #[repr(C)]
In #92972 we enabled linting on unused fields in tuple structs. In #118297 that lint was enabled by default. That exposed issues like #119659, where the fields of a struct marked `#[repr(transparent)]` were reported by the `dead_code` lint. The language team [decided](https://github.com/rust-lang/rust/issues/119659#issuecomment-1885172045) that the lint should treat `repr(transparent)` the same as `#[repr(C)]`.
Fixes#119659
Rollup of 8 pull requests
Successful merges:
- #119172 (Detect `NulInCStr` error earlier.)
- #119833 (Make tcx optional from StableMIR run macro and extend it to accept closures)
- #119967 (Add `PatKind::Err` to AST/HIR)
- #119978 (Move async closure parameters into the resultant closure's future eagerly)
- #120021 (don't store const var origins for known vars)
- #120038 (Don't create a separate "basename" when naming and opening a MIR dump file)
- #120057 (Don't ICE when deducing future output if other errors already occurred)
- #120073 (Remove spastorino from users_on_vacation)
r? `@ghost`
`@rustbot` modify labels: rollup
error on incorrect implied bounds in wfcheck except for Bevy dependents
Rebase of #109763
Additionally, special cases Bevy `ParamSet` types to not trigger the lint. This is tracked in #119956.
Fixes#109628
