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fix: #88110
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Rollup of 6 pull requests
Successful merges:
- #87976 (Account for tabs when highlighting multiline code suggestions)
- #88174 (Clarify some wording in Rust 2021 lint docs)
- #88188 (Greatly improve limitation handling on parallel rustdoc GUI test run)
- #88230 (Fix typos “a”→“an”)
- #88232 (Add notes to macro-not-found diagnostics to point out how things with the same name were not a match.)
- #88259 (Do not mark `-Z thir-unsafeck` as unsound anymore)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
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Otherwise, we can get into a situation where you have
a subtype obligation `#1 <: #2` pending, #1 is constrained
by `check_casts`, but #2` is unaffected.
Co-authored-by: Niko Matsakis <niko@alum.mit.edu>
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Add notes to macro-not-found diagnostics to point out how things with the same name were not a match.
This adds notes like:
```
error: cannot find derive macro `Serialize` in this scope
--> $DIR/issue-88206.rs:22:10
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LL | #[derive(Serialize)]
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note: `Serialize` is imported here, but it is not a derive macro
--> $DIR/issue-88206.rs:17:11
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LL | use hey::{Serialize, Deserialize};
| ^^^^^^^^^
```
Fixes https://github.com/rust-lang/rust/issues/88206
Includes https://github.com/rust-lang/rust/pull/88229
r? `@estebank`
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Fix typos “a”→“an”
Fix typos in comments; found using a regex to find some easy instance of incorrect usage of a vs. an.
While automation was used to find these, every change was checked manually.
Changes in submodules get separate PRs:
* https://github.com/rust-lang/stdarch/pull/1201
* https://github.com/rust-lang/cargo/pull/9821
* https://github.com/rust-lang/miri/pull/1874
* https://github.com/rust-lang/rls/pull/1746
* https://github.com/rust-analyzer/rust-analyzer/pull/9984
_folks @ rust-analyzer are fast at merging…_
* https://github.com/rust-analyzer/rust-analyzer/pull/9985
* https://github.com/rust-analyzer/rust-analyzer/pull/9987
* https://github.com/rust-analyzer/rust-analyzer/pull/9989
_For `clippy`, I don’t know if the changes should better better be moved to a PR to the original repo._
<hr>
This has some overlap with #88226, but neither is a strict superset of the other.
If you want multiple commits, I can split it up; in that case, make sure to suggest a criterion for splitting.
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Greatly improve limitation handling on parallel rustdoc GUI test run
Follow-up of https://github.com/rust-lang/rust/pull/88082.
r? `@dns2utf8`
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2229: Handle MutBorrow/UniqueImmBorrow better
We only want to use UniqueImmBorrow when the capture place is truncated and we
drop Deref of a MutRef.
r? `@nikomatsakis`
Fixes: https://github.com/rust-lang/project-rfc-2229/issues/56
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Improve error reporting for closure return type mismatches
Fixes #87461.
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Previously, converting `&mut [T; N]` to `&[Cell<T>; N]` looks like this:
let array = &mut [1, 2, 3];
let cells: &[Cell<i32>; 3] = Cell::from_mut(&mut array[..])
.as_slice_of_cells()
.try_into()
.unwrap();
With this new helper method, it looks like this:
let array = &mut [1, 2, 3];
let cells: &[Cell<i32>; 3] = Cell::from_mut(array).as_array_of_cells();
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Test TAITs different lifetimes in defining uses fail
r? `@oli-obk`
Related to #86727
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Rollup of 7 pull requests
Successful merges:
- #86747 (Improve wording of the `drop_bounds` lint)
- #87166 (Show discriminant before overflow in diagnostic for duplicate values.)
- #88077 (Generate an iOS LLVM target with a specific version)
- #88164 (PassWrapper: adapt for LLVM 14 changes)
- #88211 (cleanup: `Span::new` -> `Span::with_lo`)
- #88229 (Suggest importing the right kind of macro.)
- #88238 (Stop tracking namespace in used_imports.)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
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Suggest importing the right kind of macro.
Fixes #88228.
r? `@estebank`
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cleanup: `Span::new` -> `Span::with_lo`
Extracted from https://github.com/rust-lang/rust/pull/84373 as suggested in https://github.com/rust-lang/rust/pull/84373#issuecomment-857773867.
It turned out less useful then I expected, but anyway.
r? `@cjgillot`
`@bors` rollup
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Show discriminant before overflow in diagnostic for duplicate values.
This PR adds the value before overflow for explicit discriminant values in the error for duplicate discriminant values.
I found it rather confusing to see only the overflowed value.
It only does this for literals, since overflows in const evaluated arithmetic are already a hard error.
This is my first PR to the compiler, so please let me know if the implementation can be improved :)
Before:
After:
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Improve wording of the `drop_bounds` lint
This PR addresses #86653. The issue is sort of a false positive of the `drop_bounds` lint, but I would argue that the best solution for #86653 is simply a rewording of the warning message and lint description, because even if the lint is _technically_ wrong, it still forces the programmer to think about what they are doing, and they can always use `#[allow(drop_bounds)]` if they think that they really need the `Drop` bound.
There are two issues with the current warning message and lint description:
- First, it says that `Drop` bounds are "useless", which is technically incorrect because they actually do have the effect of allowing you e.g. to call methods that also have a `Drop` bound on their generic arguments for some reason. I have changed the wording to emphasize not that the bound is "useless", but that it is most likely not what was intended.
- Second, it claims that `std::mem::needs_drop` detects whether a type has a destructor. But I think this is also technically wrong: The `Drop` bound says whether the type has a destructor or not, whereas `std::mem::needs_drop` also takes nested types with destructors into account, even if the top-level type does not itself have one (although I'm not 100% sure about the exact terminology here, i.e. whether the "drop glue" of the top-level type counts as a destructor or not).
cc `@jonhoo,` does this solve the issue for you?
r? `@GuillaumeGomez`
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canonicalize consts before calling try_unify_abstract_consts query
Fixes #88022
Fixes #86953
Fixes #77708
Fixes #82034
Fixes #85031
these ICEs were all caused by calling the `try_unify_abstract_consts` query with inference vars in substs
r? `@lcnr`
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same search
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This reverts commit 5f0c54db4e595a6a77048f2b0605138ffa49a326.
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Fix clippy::collapsible_match with let expressions
This fixes rust-lang/rust-clippy#7575 which is a regression from #80357. I am fixing the bug here instead of in the clippy repo (if that's okay) because a) the regression has not been synced yet and b) I would like to land the fix on nightly asap.
The fix is basically to re-generalize `match` and `if let` for the lint implementation (they were split because `if let` no longer desugars to `match` in the HIR).
Also fixes rust-lang/rust-clippy#7586 and fixes rust-lang/rust-clippy#7591
cc `@rust-lang/clippy`
`@xFrednet` do you want to review this?
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marker_traits: require `EvaluatedToOk` during winnowing
closes #84955, while it doesn't really fix it in a way that makes me happy it should prevent the issue for now and this
test can't be reproduced anyways, so it doesn't make much sense to keep it open.
fixes #84917 as only one of the impls depends on regions, so we now drop the ambiguous one instead of the correct one.
cc https://rust-lang.zulipchat.com/#narrow/stream/144729-wg-traits/topic/winnowing.20soundly/near/247899832
r? `@nikomatsakis`
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Test that incomplete inference for TAITs fail
r? `@oli-obk`
Related to #86727
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