Add `multiple_unsafe_ops_per_block` lint
Adds a lint, which restricts an `unsafe` block to only one unsafe operation.
Closes#10064
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changelog: New lint: [`multiple_unsafe_ops_per_block`]
[#10206](https://github.com/rust-lang/rust-clippy/pull/10206)
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Fix suggestion in `transmutes_expressible_as_ptr_casts` when the source type is a borrow.
fixes#9894
changelog: `transmutes_expressible_as_ptr_casts`: Fix suggestion when the source type is a borrow.
[needless_return]: Remove all semicolons on suggestion
Closes#10182
Multiple semicolons currently breaks autofix for `needless_return` suggestions. Any semicolons left after removing return means that the return type will always be `()`, and thus fail to compile.
This PR allows `needless_return` to remove multiple semicolons.
The change won't cover the case where there is multiple line yet.
i.e.
```rust
fn needless_return() -> bool {
return true;
;;
}
```
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changelog: Sugg: [`needless_return`]: Now removes all semicolons on the same line
[#10187](https://github.com/rust-lang/rust-clippy/pull/10187)
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`cast_possible_truncation` Suggest TryFrom when truncation possible
This fixes the last issues from https://github.com/rust-lang/rust-clippy/pull/9664 as the author seems to be inactive. The PR author was sadly kept during the rebase, due to the conflict resolution.
IDK if it's worth it do to a full review, I only added the last commit, everything else remained the same, besides a rebase.
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changelog: Sugg: [`cast_possible_truncation`]: Now suggests using `try_from` or allowing the lint
[#10038](https://github.com/rust-lang/rust-clippy/pull/10038)
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closes: https://github.com/rust-lang/rust-clippy/issues/9231
Add missing arguments to `new_lint` example of `cargo` lints
changelog: Add missing arguments to `new_lint` code example.
From the surrounding text, it seems like this code example is missing the arguments to create a new `cargo` lint.
Don't pass `--sysroot` twice if SYSROOT is set
This is useful for rust-lang/rust to allow setting a sysroot that's *only* for build scripts, different from the regular sysroot passed in RUSTFLAGS (since cargo doesn't apply RUSTFLAGS to build scripts or proc-macros).
That said, the exact motivation is not particularly important: this fixes a regression from
5907e9155e (r1060215684).
Note that only RUSTFLAGS is tested in the new integration test; passing --sysroot through `clippy-driver` never worked as far as I can tell, and no one is using it, so I didn't fix it here.
Helps with https://github.com/rust-lang/rust/pull/106394.
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changelog: other: `SYSROOT` and `--sysroot` can now be set at the same time
[#10149](https://github.com/rust-lang/rust-clippy/pull/10149)
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Whne SYSROOT is defined, clippy-driver will insert a --sysroot argument
when calling rustc. However, when a sysroot argument is already defined,
e.g. through RUSTFLAGS=--sysroot=... the `cargo clippy` call would
error. This tests that the sysroot argument is only passed once and that
SYSROOT is ignored in this case.
This is useful for rust-lang/rust to allow setting a sysroot that's
*only* for build scripts, different from the regular sysroot passed in
RUSTFLAGS (since cargo doesn't apply RUSTFLAGS to build scripts or
proc-macros).
That said, the exact motivation is not particularly important: this
fixes a regression from
5907e9155e (r1060215684).
Note that only RUSTFLAGS is tested in the new integration test; passing
--sysroot through `clippy-driver` never worked as far as I can tell, and
no one is using it, so I didn't fix it here.
Allow implementing `Hash` with derived `PartialEq` (`derive_hash_xor_eq`
This is a common pattern and is totally allowed by the `Hash` trait.
Fixes#2627
changelog: Move: Renamed `derive_hash_xor_eq` to [`derived_hash_with_manual_eq`]
[#10184](https://github.com/rust-lang/rust-clippy/pull/10184)
changelog: Enhancement: [`derived_hash_with_manual_eq`]: Now allows `#[derive(PartialEq)]` with custom `Hash` implementations
[#10184](https://github.com/rust-lang/rust-clippy/pull/10184)
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trim paths in `suspicious_to_owned`
This continues my path trimming spree. I'm not going to add yet another changelog entry, we should have one "trim paths in some applicable lints" entry instead.
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changelog: none
expl_impl_clone_on_copy: ignore packed structs with type/const params
changelog: [`expl_impl_clone_on_copy`]: Ignore `#[repr(packed)]` structs with type or const paramaters
Fixes#10188
A more involved solution that checks if any bound on the trait impl aren't present on the struct definition would be ideal, but I couldn't see a nice way to go about that
unused_self: Don't trigger if the method body contains todo!()
If the author is using todo!(), presumably they intend to use self at some point later, so we don't have a good basis to recommend factoring out to an associated function.
Fixes#10117.
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changelog: Enhancement: [`unused_self`]: No longer lints, if the method body contains a `todo!()` call
[#10166](https://github.com/rust-lang/rust-clippy/pull/10166)
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[arithmetic_side_effects] Add more tests related to custom types
Add tests to ensure that custom types are triggered with any type of arithmetic operation as well as combinations with or without references.
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changelog: none
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