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(fix #99092)
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Rollup of 5 pull requests
Successful merges:
- #97249 (`<details>`/`<summary>` UI fixes)
- #98418 (Allow macOS to build LLVM as shared library)
- #98460 (Use CSS variables to handle theming)
- #98497 (Improve some inference diagnostics)
- #98708 (rustdoc: fix 98690 Panic if invalid path for -Z persist-doctests)
Failed merges:
- #98761 (more `need_type_info` improvements)
r? `@ghost`
`@rustbot` modify labels: rollup
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trait predicate
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update coherence docs, fix generator + opaque type ICE
the world is confusing, this makes it slightly less so
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Overlap inherent impls
r? `@nikomatsakis`
Closes #94526
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This also reorders the fields to reduce the assembly operations for hashing
and changes two UI tests that depended on the former ordering because of
hashmap iteration order.
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Be more thorough in using `ItemObligation` and `BindingObligation` when
evaluating obligations so that we can point at trait bounds that
introduced unfulfilled obligations. We no longer incorrectly point at
unrelated trait bounds (`substs-ppaux.verbose.stderr`).
In particular, we now point at trait bounds on method calls.
We no longer point at "obvious" obligation sources (we no longer have a
note pointing at `Trait` saying "required by a bound in `Trait`", like
in `associated-types-no-suitable-supertrait*`).
Address part of #89418.
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overlap
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Fixes #88969
It appears that *just* disabling the evaluation cache (in #88994)
leads to other issues involving intercrate mode caching. I suspect
that since we now always end up performing the full evaluation
in intercrate mode, we end up 'polluting' the candidate and projection
caches with results that depend on being in intercrate mode in some way.
Previously, we might have hit a cached evaluation (stored during
non-intercrate mode), and skipped doing this extra work in
intercrate mode.
The whole situation with intercrate mode caching is turning into
a mess. Ideally, we would remove intercrate mode entirely - however,
this might require waiting on Chalk.
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Point at argument instead of call for their obligations
When an obligation is introduced by a specific `fn` argument, point at
the argument instead of the `fn` call if the obligation fails to be
fulfilled.
Move the information about pointing at the call argument expression in
an unmet obligation span from the `FulfillmentError` to a new
`ObligationCauseCode`.
When giving an error about an obligation introduced by a function call
that an argument doesn't fulfill, and that argument is a block, add a
span_label pointing at the innermost tail expression.
Current output:
```
error[E0425]: cannot find value `x` in this scope
--> f10.rs:4:14
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4 | Some(x * 2)
| ^ not found in this scope
error[E0277]: expected a `FnOnce<({integer},)>` closure, found `Option<_>`
--> f10.rs:2:31
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2 | let p = Some(45).and_then({
| ______________________--------_^
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| | required by a bound introduced by this call
3 | | |x| println!("doubling {}", x);
4 | | Some(x * 2)
| | -----------
5 | | });
| |_____^ expected an `FnOnce<({integer},)>` closure, found `Option<_>`
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= help: the trait `FnOnce<({integer},)>` is not implemented for `Option<_>`
```
Previous output:
```
error[E0425]: cannot find value `x` in this scope
--> f10.rs:4:14
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4 | Some(x * 2)
| ^ not found in this scope
error[E0277]: expected a `FnOnce<({integer},)>` closure, found `Option<_>`
--> f10.rs:2:22
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2 | let p = Some(45).and_then({
| ^^^^^^^^ expected an `FnOnce<({integer},)>` closure, found `Option<_>`
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= help: the trait `FnOnce<({integer},)>` is not implemented for `Option<_>`
```
Partially address #27300. Will require rebasing on top of #88546.
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r=petrochenkov
fix(rustc_typeck): produce better errors for dyn auto trait
Fixes #85026
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Co-authored-by: Vadim Petrochenkov <vadim.petrochenkov@gmail.com>
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Fixes #85026
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They were originally called "opt-in, built-in traits" (OIBITs), but
people realized that the name was too confusing and a mouthful, and so
they were renamed to just "auto traits". The feature flag's name wasn't
updated, though, so that's what this PR does.
There are some other spots in the compiler that still refer to OIBITs,
but I don't think changing those now is worth it since they are internal
and not particularly relevant to this PR.
Also see <https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/opt-in.2C.20built-in.20traits.20(auto.20traits).20feature.20name>.
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Fix #77598.
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Fix grammar in note for orphan-rule error [E0210]
Fixes the grammar in the error note for [E0210] from:
_"= note: implementing a foreign trait is only possible if at least one of the types for which **is it** implemented is local"_
to:
_"= note: implementing a foreign trait is only possible if at least one of the types for which **it is** implemented is local"_
The content of this commit is the result of running the following command at the repository root:
`find . \( -type d -name .git -prune \) -o -type f -print0 | xargs -0 sed -i 's/which is it implemented/which it is implemented/g'`
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Remove `Box::leak_with_alloc`
Add leak-test for box with allocator
Rename `AllocErr` to `AllocError` in leak-test
Add `Box::alloc` and adjust examples to use the new API
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