Properly report error on `const gen fn`
Fixes#130232
Also removes some (what I thought were unused) functions, and fixes a bug in clippy where we considered `gen fn` to be the same as `fn` because it was only built to consider asyncness.
Fix `clippy::useless_conversion`
Self-explanatory. Probably the last clippy change I'll actually put up since this is the only other one I've actually seen in the wild.
Simplify some nested `if` statements
Applies some but not all instances of `clippy::collapsible_if`. Some ended up looking worse afterwards, though, so I left those out. Also applies instances of `clippy::collapsible_else_if`
Review with whitespace disabled please.
Fix default/minimum deployment target for Aarch64 simulator targets
The minimum that `rustc` encoded did not match [the version in Clang](https://github.com/llvm/llvm-project/blob/llvmorg-18.1.8/llvm/lib/TargetParser/Triple.cpp#L1900-L1932), and that meant that that when linking, Clang ended up bumping the version. See https://github.com/rust-lang/rust/issues/129432 for more motivation behind this change.
Specifically, this PR sets the correct deployment target of the following targets:
- `aarch64-apple-ios-sim` from 10.0 to 14.0
- `aarch64-apple-tvos-sim` from 10.0 to 14.0
- `aarch64-apple-watchos-sim` from 5.0 to 7.0
- `aarch64-apple-ios-macabi` from 13.1 to 14.0
I have chosen not to document the `-sim` changes in the platform support docs, as it is fundamentally uninteresting; the normal targets (e.g. `aarch64-apple-ios`) still have the same deployment target, and that's what developers should actually target.
r? compiler
CC `@BlackHoleFox`
Pass deployment target when linking with CC on Apple targets
This PR effectively implements what's also being considered in the `cc` crate [here](https://github.com/rust-lang/cc-rs/issues/1030#issuecomment-2051020649), that is:
- When linking macOS targets with CC, pass the `-mmacosx-version-min=.` option to specify the desired deployment target. Also, no longer pass `-m32`/`-m64`, these are redundant since we already pass `-arch`.
- When linking with CC on iOS, tvOS, watchOS and visionOS, only pass `-target` (we assume for these targets that CC forwards to Clang).
This is required to get the linker to emit the correct `LC_BUILD_VERSION` of the final binary. See https://github.com/rust-lang/rust/issues/129432 for more motivation behind this change.
r? compiler
CC `@BlackHoleFox`
Add -Z small-data-threshold
This flag allows specifying the threshold size above which LLVM should not consider placing small objects in a `.sdata` or `.sbss` section.
Support is indicated in the target options via the
small-data-threshold-support target option, which can indicate either an
LLVM argument or an LLVM module flag. To avoid duplicate specifications
in a large number of targets, the default value for support is
DefaultForArch, which is translated to a concrete value according to the
target's architecture.
Use the same span for attributes and Try expansion of ?
This is needed for Clippy to know that the `#[allow(unused)]` attributes added by the expansion of `?` are part of the desugaring, and that they do not come from the user code.
rust-lang/rust-clippy#13380 exhibits a manifestation of this problem and will be fixed by this change.
miri: fix overflow detection for unsigned pointer offset
This is the Miri part of https://github.com/rust-lang/rust/pull/130229. This is already UB in codegen so we better make Miri detect it; updating the docs may take time if we have to follow some approval process, but let's make Miri match reality ASAP.
r? ``@scottmcm``
Don't warn empty branches unreachable for now
The [stabilization](https://github.com/rust-lang/rust/pull/122792) of `min_exhaustive_patterns` updated the `unreachable_pattern` lint to trigger on empty arms too. This has caused some amount of churn, and imposes an unjoyful `#[allow(unreachable_patterns)]` onto library authors who want to stay backwards-compatible.
While I think the lint should eventually cover these cases, for transition's sake I'd prefer to revert linting to what it was prior to stabilization, at least for now.
Fixes https://github.com/rust-lang/rust/issues/129031.
r? ``@compiler-errors``
This is needed for Clippy to know that the `#[allow(unused)]` attributes
added by the expansion of `?` are part of the desugaring, and that they
do not come from the user code.
rust-lang/rust-clippy#13380 exhibits a manifestation of this problem.
Rollup of 9 pull requests
Successful merges:
- #129260 (Don't suggest adding return type for closures with default return type)
- #129520 (Suggest the correct pattern syntax on usage of unit variant pattern for a struct variant)
- #129866 (Clarify documentation labelling and definitions for std::collections)
- #130123 (Report the `note` when specified in `diagnostic::on_unimplemented`)
- #130161 (refactor merge base logic and fix `x fmt`)
- #130206 (Map `WSAEDQUOT` to `ErrorKind::FilesystemQuotaExceeded`)
- #130207 (Map `ERROR_CANT_RESOLVE_FILENAME` to `ErrorKind::FilesystemLoop`)
- #130219 (Fix false positive with `missing_docs` and `#[test]`)
- #130221 (Make SearchPath::new public)
r? `@ghost`
`@rustbot` modify labels: rollup
Make SearchPath::new public
I'm writing a tool that uses `rustc_interface`, and would like to construct `SearchPath` with its `new` method.
As all three fields in `SearchPath` are public anyway, the proposed change should not change the privacy or encapsulation of the struct.
Fix false positive with `missing_docs` and `#[test]`
Since #130025, the compiler don't ignore missing_docs when compiling the tests. But there is now a false positive warning for every `#[test]`
For example, this code
```rust
//! Crate docs
fn just_a_test() {}
```
Would emit this warning when running `cargo test`
```
warning: missing documentation for a constant
--> src/lib.rs:5:1
|
4 | #[test]
| ------- in this procedural macro expansion
5 | fn just_a_test() {}
| ^^^^^^^^^^^^^^^^^^^
```
Report the `note` when specified in `diagnostic::on_unimplemented`
Before this PR the `note` field was completely ignored for some reason, now it is shown (I think) correctly during the hir typechecking phase.
1. Report the `note` when specified in `diagnostic::on_unimplemented`
2. Added a test for unimplemented trait diagnostic
3. Added a test for custom unimplemented trait diagnostic
Close#130084
P.S. This is my first PR to rustc.
Suggest the correct pattern syntax on usage of unit variant pattern for a struct variant
Closes#126243
I add a suggestion on usage of unit variant pattern for a struct variant.
Since #130025, the compiler don't ignore missing_docs when compiling the tests.
But there is now a false positive warning for every `#[test]`
For example, this code
```rust
//! Crate docs
fn just_a_test() {}
```
Would emit this warning when running `cargo test`
```
warning: missing documentation for a constant
--> src/lib.rs:5:1
|
4 | #[test]
| ------- in this procedural macro expansion
5 | fn just_a_test() {}
| ^^^^^^^^^^^^^^^^^^^
```
generalize: track relevant info in cache key
This was previously theoretically incomplete as we could incorrectly generalize as if the type was in an invariant context even though we're in a covariant one. Similar with the `in_alias` flag.
r? `@compiler-errors`
Enumerate lint expectations using AttrId
This PR implements the idea I outlined in https://github.com/rust-lang/rust/issues/127884#issuecomment-2240338547
We can uniquely identify a lint expectation `#[expect(lint0, lint1...)]` using the `AttrId` and the index of the lint inside the attribute. This PR uses this property in `check_expectations`.
In addition, this PR stops stashing expected diagnostics to wait for the unstable -> stable `LintExpectationId` mapping: if the lint is emitted with an unstable attribute, it must have been emitted by an `eval_always` query (like inside the resolver), so won't be loaded from cache. Decoding an `AttrId` from the on-disk cache ICEs, so we have no risk of accidentally checking an expectation.
Fixes https://github.com/rust-lang/rust/issues/127884
cc `@xFrednet`
This flag allows specifying the threshold size above which LLVM should
not consider placing small objects in a .sdata or .sbss section.
Support is indicated in the target options via the
small-data-threshold-support target option, which can indicate either an
LLVM argument or an LLVM module flag. To avoid duplicate specifications
in a large number of targets, the default value for support is
DefaultForArch, which is translated to a concrete value according to the
target's architecture.
coverage: Clean up terminology in counter creation
Some of the terminology in this module is confusing, or has drifted out of sync with other parts of the coverage code.
This PR therefore renames some variables and methods, and adjusts comments and debug logging statements, to make things clearer and more consistent.
No functional changes, other than some small tweaks to debug logging.
Also emit `missing_docs` lint with `--test` to fulfil expectations
This PR removes the "test harness" suppression of the `missing_docs` lint to be able to fulfil `#[expect]` (expectations) as it is now "relevant".
I think the goal was to maybe avoid false-positive while linting on public items under `#[cfg(test)]` but with effective visibility we should no longer have any false-positive.
Another possibility would be to query the lint level and only emit the lint if it's of expect level, but that is even more hacky.
Fixes https://github.com/rust-lang/rust/issues/130021
try-job: x86_64-gnu-aux
Rollup of 11 pull requests
Successful merges:
- #128316 (Stabilize most of `io_error_more`)
- #129473 (use `download-ci-llvm=true` in the default compiler config)
- #129529 (Add test to build crates used by r-a on stable)
- #129981 (Remove `serialized_bitcode` from `LtoModuleCodegen`.)
- #130094 (Inform the solver if evaluation is concurrent)
- #130132 ([illumos] enable SIGSEGV handler to detect stack overflows)
- #130146 (bootstrap `naked_asm!` for `compiler-builtins`)
- #130149 (Helper function for formatting with `LifetimeSuggestionPosition`)
- #130152 (adapt a test for llvm 20)
- #130162 (bump download-ci-llvm-stamp)
- #130164 (move some const fn out of the const_ptr_as_ref feature)
r? `@ghost`
`@rustbot` modify labels: rollup
