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Delay bug for negative auto trait rather than ICEing
Fixes #138149
r? oli-obk
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rustdoc: Add attribute-related tests for rustdoc JSON.
Add rustdoc JSON tests covering the use of the following attributes:
- `#[non_exhaustive]` applied to enums, variants, and structs
- `#[must_use]`, both with and without a message
- `#[no_mangle]`, in both edition 2021 and 2024 (`#[unsafe(no_mangle)]`) flavors
- `#[export_name]`, also in both edition 2021 and 2024 flavors
Related to #137645; this is a subset of the attributes that `cargo-semver-checks` relies on and tests in its own test suite or in the test suites of its components such as `trustfall-rustdoc-adapter`.
Helps with #81359
r? `@aDotInTheVoid`
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Remove i586-pc-windows-msvc
See [MCP 840](https://github.com/rust-lang/compiler-team/issues/840).
I left a specialized error message that should help users that hit this in the wild (for example, because they use it in their CI).
```
error: Error loading target specification: the `i586-pc-windows-msvc` target has been removed. Use the `i686-pc-windows-msvc` target instead.
Windows 10 (the minimum required OS version) requires a CPU baseline of at least i686 so you can safely switch. Run `rustc --print target-list` for a list of built-in targets
```
``@workingjubilee`` ``@calebzulawski`` fyi portable-simd uses this target in CI, if you wanna remove it already before this happens
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Prevent `rmake.rs` from using unstable features, and fix 3 run-make tests that currently do
Addresses (mostly) #137532.
Follow-up to #137373.
### Summary
- Fix 3 run-make tests that currently use unstable features:
1. `tests/run-make/issue-107495-archive-permissions/rmake.rs` uses `#![feature(rustc_private)]` for `libc` on `unix`, but `run_make_support` already exports `libc`, so just use that.
2. `tests/run-make/cross-lang-lto/rmake.rs` uses `#![feature(path_file_prefix)]` for convenience, replaced with similar filename prefix logic.
3. `tests/run-make/broken-pipe-no-ice/rmake.rs` uses `#![feature(anonymous_pipe)]` for anonymous pipes. This is more complicated[^race-condition], and I decided to temporarily introduce a dependency on [`os_pipe`] before std's `anonymous_pipe` library feature is stabilized[^pipe-stab]. I left a FIXME tracked by #137532 to make the switch once `anonymous_pipe` stabilizes and reaches beta.
- Use `RUSTC_BOOTSTRAP=-1` when building `rmake.rs` to have the stage 0 rustc reject any unstable features used in `rmake.rs`.
- The requirement that `rmake.rs` may not use any unstable features is now documented in rustc-dev-guide.
- This PR does not impose `RUSTC_BOOTSTRAP=-1` when building `run-make-support`, but I suppose we could.
r? `@Kobzol`
try-job: x86_64-msvc-1
try-job: x86_64-mingw-1
[`os_pipe`]: https://github.com/oconnor663/os_pipe.rs
[^race-condition]: We can't just try to spawn `rustc` and immediate close the stderr handle because of race condition, as there's no guarantee `rustc` will not try to print to stderr before the handle gets closed.
[^pipe-stab]: In-progress stabilization PR over at https://github.com/rust-lang/rust/pull/135822.
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tests: fix some typos in comment
fix some typos in comment
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Suggest struct or union to add generic that impls trait
Fixes #135759
cc ```@tdittr```
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Reduce `kw::Empty` usage, part 1
This PR fixes some confusing `kw::Empty` usage, fixing a crash test along the way.
r? ```@spastorino```
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Ergonomic ref counting
This is an experimental first version of ergonomic ref counting.
This first version implements most of the RFC but doesn't implement any of the optimizations. This was left for following iterations.
RFC: https://github.com/rust-lang/rfcs/pull/3680
Tracking issue: https://github.com/rust-lang/rust/issues/132290
Project goal: https://github.com/rust-lang/rust-project-goals/issues/107
r? ```@nikomatsakis```
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Rollup of 6 pull requests
Successful merges:
- #137674 (Enable `f16` for LoongArch)
- #138034 (library: Use `size_of` from the prelude instead of imported)
- #138060 (Revert #138019 after further discussion about how hir-pretty printing should work)
- #138073 (Break critical edges in inline asm before code generation)
- #138107 (`librustdoc`: clippy fixes)
- #138111 (Use `default_field_values` for `rustc_errors::Context`, `rustc_session::config::NextSolverConfig` and `rustc_session::config::ErrorOutputType`)
r? `@ghost`
`@rustbot` modify labels: rollup
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Currently it relies on special treatment of `kw::Empty`, which is really
easy to get wrong. This commit makes the special case clearer in the
type system by using `Option`. It's a bit clumsy, but the synthetic name
handling itself is a bit clumsy; better to make it explicit than sneak
it in.
Fixes #133426.
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Break critical edges in inline asm before code generation
An inline asm terminator defines outputs along its target edges -- a
fallthrough target and labeled targets. Code generation implements this
by inserting code directly into the target blocks. This approach works
only if the target blocks don't have other predecessors.
Establish required invariant by extending existing code that breaks
critical edges before code generation.
Fixes #137867.
r? ``@bjorn3``
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Revert #138019 after further discussion about how hir-pretty printing should work
After some more discussion, #138019 was probably merged a little fast. Though there probably is a real bug in pretty printing, it is not feasible to add similar pretty printing routines for all attributes, and making this specific exception is likely not desired either. For more context, see post-merge comments on #138019
I kept the tests around, but reverted the hir-pretty change.
r? ```@compiler-errors```
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Suggest typo fix for static lifetime
...and don't try to introduce a new lifetime param named something like `'statoc`.
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Improve the generic MIR in the default `PartialOrd::le` and friends
It looks like I regressed this accidentally in #137197 due to #137901
So this PR does two things:
1. Tweaks the way we're calling `is_some_and` so that it optimizes in the generic MIR (rather than needing to optimize it in every monomorphization) -- the first commit adds a MIR test, so you can see the difference in the second commit.
2. Updates the implementations of `is_le` and friends to be slightly simpler, and parallel how clang does them.
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Rollup of 17 pull requests
Successful merges:
- #137827 (Add timestamp to unstable feature usage metrics)
- #138041 (bootstrap and compiletest: Use `size_of_val` from the prelude instead of imported)
- #138046 (trim channel value in `get_closest_merge_commit`)
- #138053 (Increase the max. custom try jobs requested to `20`)
- #138061 (triagebot: add a `compiler_leads` ad-hoc group)
- #138064 (Remove - from xtensa targets cpu names)
- #138075 (Use final path segment for diagnostic)
- #138078 (Reduce the noise of bootstrap changelog warnings in --dry-run mode)
- #138081 (Move `yield` expressions behind their own feature gate)
- #138090 (`librustdoc`: flatten nested ifs)
- #138092 (Re-add `DynSend` and `DynSync` impls for `TyCtxt`)
- #138094 (a small borrowck cleanup)
- #138098 (Stabilize feature `const_copy_from_slice`)
- #138103 (Git ignore citool's target directory)
- #138105 (Fix broken link to Miri intrinsics in documentation)
- #138108 (Mention me (WaffleLapkin) when changes to `rustc_codegen_ssa` occur)
- #138117 ([llvm/PassWrapper] use `size_t` when building arg strings)
r? `@ghost`
`@rustbot` modify labels: rollup
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Signed-off-by: tcpdumppy <847462026@qq.com>
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a small borrowck cleanup
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Move `yield` expressions behind their own feature gate
In order to make progress with the `iter!` macro (e.g. in #137725), we need `yield` expressions to be available without the `coroutines` feature. This PR moves `yield` to be guarded by the `yield_expr` feature so that we can stabilize that independently (or at least, concurrently with the `iter_macro` feature). Note that once `yield` is stable, it will still be an error to use `yield` expressions outside something like a generator or coroutine, and these features remain unstable.
r? `@oli-obk`
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Use final path segment for diagnostic
Test changes should prove the effect of this PR; we want to mention the *function name* not the arbitrary first segment of the path.
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Add timestamp to unstable feature usage metrics
part of https://github.com/rust-lang/rust/issues/129485
with this we should be able to temporarily enable metrics on docs.rs to gather a nice test dataset for the initial PoC dashboard
r? ```@estebank```
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An inline asm terminator defines outputs along its target edges -- a
fallthrough target and labeled targets. Code generation implements this
by inserting code directly into the target blocks. This approach works
only if the target blocks don't have other predecessors.
Establish required invariant by extending existing code that breaks
critical edges before code generation.
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Improve error message for `AsyncFn` trait failure for RPIT
Use a `WellFormedDerived` obligation cause to make sure we can turn an `AsyncFnKindHelper` trait goal into its parent `AsyncFn*` goal, then fix the logic for reporting `AsyncFn*` kind mismatches.
Best reviewed without whitespace.
Fixes #137905
r? oli-obk
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Provide more context on resolve error caused from incorrect RTN
When encountering a resolve E0575 error for an associated method (when a type was expected), see if it could have been an intended return type notation bound.
```
error[E0575]: expected associated type, found associated function `Trait::method`
--> $DIR/bad-inputs-and-output.rs:31:36
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LL | fn foo_qualified<T: Trait>() where <T as Trait>::method(i32): Send {}
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help: you might have meant to use the return type notation syntax
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LL - fn foo_qualified<T: Trait>() where <T as Trait>::method(i32): Send {}
LL + fn foo_qualified<T: Trait>() where T::method(..): Send {}
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```
Built on top of #137824, only second commit is relevant for review.
r? ````````@compiler-errors````````
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Do not require that unsafe fields lack drop glue
Instead, we adopt the position that introducing an `unsafe` field itself carries a safety invariant: that if you assign an invariant to that field weaker than what the field's destructor requires, you must ensure that field is in a droppable state in your destructor.
See:
- https://github.com/rust-lang/rfcs/pull/3458#discussion_r1971676100
- https://rust-lang.zulipchat.com/#narrow/channel/213817-t-lang/topic/unsafe.20fields.20RFC/near/502113897
Tracking Issue: #132922
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adjust Layout debug printing to match the internal field name
The field got renamed a while ago, but the debug printing was not updated to match.
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r=lcnr
Ensure that negative auto impls are always applicable
r? lcnr (or reassign if you dont want to review)
https://github.com/rust-lang/rust/issues/68318#issuecomment-2689265030
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fix usage of ty decl macro fragments in attributes
See the test case. Due to one missing code path (and also the changes in #137517), using $ty or other specific fragments as part of an attr wouldn't work. $tt used to work since it wouldn't be parsed anywhere along the way.
Closes #137662
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