Delayed bug audit #121285
Delayed bug audit #121285
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☔ The latest upstream changes (presumably #120576) made this pull request unmergeable. Please resolve the merge conflicts. |
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I rebased. |
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☔ The latest upstream changes (presumably #121383) made this pull request unmergeable. Please resolve the merge conflicts. |
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Sorry, I'm kind of swamped and don't currently have the patience to review this as closely as it deserves r? compiler |
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r? @lcnr |
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| let result: Result<_, ErrorGuaranteed> = self | ||
| .param_env | ||
| .and(type_op::normalize::Normalize::new(ty)) | ||
| .fully_perform(self.infcx, span) | ||
| else { | ||
| .fully_perform(self.infcx, span); | ||
| let Ok(TypeOpOutput { output: norm_ty, constraints: c, .. }) = result else { | ||
| // Note: this path is currently not reached in any test, so | ||
| // any example that triggers this would be worth minimizing | ||
| // and converting into a test. | ||
| tcx.dcx().span_delayed_bug(span, format!("failed to normalize {ty:?}")); | ||
| continue; | ||
| }; | ||
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There was a problem hiding this comment.
The commit message explains it:
The existing code calls a function that returns `Result<_,
ErrorGuaranteed>`, and then calls `span_delayed_bug` pointlessly in the
`Err` case.
The comment was added since I first wrote this, I will remove it. Or I could instead insert a span_bug here.
The existing code calls a function that returns `Result<_, ErrorGuaranteed>`, and then calls `span_delayed_bug` pointlessly in the `Err` case.
I find the function much easier to read this way. Thanks to @kadiwa4 for the suggestion.
…_ribs`. `Resolver::report_error` always emits (this commit makes that clearer), so the `span_delayed_bug` is unnecessary.
Also change its return type to `Result`.
By returning error guarantees from a few functions it relies on.
By storing error guarantees in `RegionErrors`.
To make them more concise and similar to each other.
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New code is up, hopefully it addresses all the comments. |
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@bors r+ |
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☀️ Test successful - checks-actions |
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Finished benchmarking commit (9afdb8d): comparison URL. Overall result: ✅ improvements - no action needed@rustbot label: -perf-regression Instruction countThis is a highly reliable metric that was used to determine the overall result at the top of this comment.
Max RSS (memory usage)ResultsThis is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.
CyclesThis benchmark run did not return any relevant results for this metric. Binary sizeThis benchmark run did not return any relevant results for this metric. Bootstrap: 651.401s -> 650.65s (-0.12%) |
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This wasn't expected to have any effect on performance. I suspect the (good) results are just noise. |
I went through all the calls to
delayed_bugandspan_delayed_bugand found a few places where they could be avoided.r? @compiler-errors