Rollup of 5 pull requests #100213
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Rollup of 5 pull requests #100213
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…ark-Simulacrum deps: dedupe `annotate-snippets` crate versions Dedupes `annotate-snippets` crate versions (https://github.com/rust-lang/annotate-snippets-rs/blob/0.9.1/CHANGELOG.md). Should work, but there is not a lot of tests. Looks like switching to that crate a bit stalled.
Remove Windows function preloading After `@Mark-Simulacrum` asked me to provide guidance for when optionally imported functions should be preloaded, I realised my justifications were now quite weak. I think the strongest argument that can be made is that it avoids some degree of nondeterminism when calling these functions (in as far as system API calls can be said to be deterministic). However, I don't think that's particularly convincing unless there's a real world use case where it matters. Further discussion with `@thomcc` has strengthened my feeling that preloading isn't really needed. Note that `WaitOnAddress` needed some adjustment to work without preloading. I opted not to use a macro for this special case as it seemed silly to do so for just one thing (and I don't like macros tbh).
…pan, r=lcnr
Avoid pointing out `return` span if it has nothing to do with type error
This code:
```rust
fn f(_: String) {}
fn main() {
let x = || {
if true {
return ();
}
f("");
};
}
```
Emits this:
```
Compiling playground v0.0.1 (/playground)
error[E0308]: mismatched types
--> src/main.rs:8:11
|
8 | f("");
| ^^- help: try using a conversion method: `.to_string()`
| |
| expected struct `String`, found `&str`
|
note: return type inferred to be `String` here
--> src/main.rs:6:20
|
6 | return ();
| ^^
```
Specifically, that note has nothing to do with the type error in question. This is because the change implemented in rust-lang#84244 tries to point out the `return` span on _any_ type coercion error within a closure that happens after a `return` statement, regardless of if the error has anything to do with it.
This is really easy to trigger -- just needs a closure (or an `async`) and an early return (or any other form, e.g. `?` operator suffices) -- and super distracting in production codebases. I'm letting rust-lang#84128 regress because that issue is much harder to fix correctly, and I can re-open that issue after this lands.
As a drive-by, I added a `resolve_vars_if_possible` to the coercion error logic, which leads to some error improvements. Unrelated to the issue above, though.
…o, r=workingjubilee Optimize `pointer::as_aligned_to` This PR replaces `addr % align` with `addr & align - 1`, which is correct due to `align` being a power of two. Here is a proof that this makes things better: [[godbolt]](https://godbolt.org/z/Wbq3hx6YG). This PR also removes `assume(align != 0)`, with the new impl it does not improve anything anymore ([[godbolt]](https://rust.godbolt.org/z/zcnrG4777), [[original concern]](rust-lang#95643 (comment))).
ascii -> ASCII in code comment Easy one I spotted while reading source code.
rustbot
added
T-compiler
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@bors r+ rollup=never p=5 |
bors
added
the
S-waiting-on-bors
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☀️ Test successful - checks-actions |
|
📌 Perf builds for each rolled up PR: In the case of a perf regression, run the following command for each PR you suspect might be the cause: |
This was referenced Aug 7, 2022
|
Finished benchmarking commit (cc71eef): comparison url. Instruction countThis benchmark run did not return any relevant results for this metric. Max RSS (memory usage)Results
CyclesThis benchmark run did not return any relevant results for this metric. If you disagree with this performance assessment, please file an issue in rust-lang/rustc-perf. @rustbot label: -perf-regression Footnotes |
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Successful merges:
annotate-snippetscrate versions #100071 (deps: dedupeannotate-snippetscrate versions)returnspan if it has nothing to do with type error #100130 (Avoid pointing outreturnspan if it has nothing to do with type error)pointer::is_aligned_to#100169 (Optimizepointer::as_aligned_to)Failed merges:
r? @ghost
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