don't link to the nightly version of the Edition Guide in stable lints
As reported in rust-lang/rust#143557 for `rust_2024_incompatible_pat`, most future-Edition-incompatibility lints link to the nightly version of the Edition Guide; the lints were written before their respective Editions (and their guides) stabilized. But now that Rusts 2021 and 2024 are stable, these lints are emitted on stable versions of the compiler, where it makes more sense to present users with links that don't say "nightly" in them.
This does not change the link for `rust_2024_incompatible_pat`. That's handled in rust-lang/rust#144006.
clippy: make tests work in stage 1
This finally fixes https://github.com/rust-lang/rust/issues/78717 :)
Similar to what Miri already does, the clippy test step needs to carefully consider which compiler is used to build clippy and which compiler is linked into clippy (and thus must be used to build the test dependencies). On top of that we have some extra complications that Miri avoided by using `cargo-miri` for building its test dependencies: we need cargo to use the right rustc and the right sysroot, but https://github.com/rust-lang/cargo/issues/4423 makes this quite hard to do. See the long comment in `src/tools/clippy/tests/compile-test.rs` for details.
Some clippy tests tried to import rustc crates; that fundamentally requires a full bootstrap loop so it cannot work in stage 1. I had to kind of guess what those tests were doing so I don't know if my changes there make any sense.
Cc ```@flip1995``` ```@Kobzol```
Fix false positive in `useless_attribute` with `redundant_imports`
Add `redundant_imports` to the list of allowed lints on use items to
prevent
`useless_attribute` from triggering false positives when
`#[expect(redundant_imports)]`
or similar attributes are used on use statements.
fixesrust-lang/rust-clippy#15316
---
changelog: [`useless_attribute`]: fix false positive when using
`#[expect(redundant_imports)]` and similar lint attributes on `use`
statements
The useless_attribute lint was incorrectly flagging #[expect(redundant_imports)]
as useless when applied to macro re-exports. This occurred because the lint
didn't recognize 'redundant_imports' as a valid rustc lint name.
This commit:
- Adds 'redundant_imports' to the list of known rustc lints in sym.rs
- Updates the useless_attribute lint to properly handle this case
- Adds a regression test to prevent future false positives
Fixesrust-lang/rust-clippy#15192 by adding checks for no_std while
giving out Box recommendation
```
changelog: [`large_enum_variant`]: Dont suggest `Box` in `no_std` mode
```
- Updated the `help:` text to include a more general suggestion
- Ensures compatibility with `#[no_std]` environments where boxing is
still possible via `alloc`.
Closesrust-lang/rust-clippy#15007
Removes the `break` stmt and the dead code after it when appropriate.
changelog: [`never_loop`] Make sure to remove `break` in suggestions
