Do not overwrite lifetime binders for another HirId. #101454
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| error[E0277]: the trait bound `for<'b> for<'b> fn(&'b ()): Foo` is not satisfied | |||
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The diagnostic looks a bit silly. I don't know why we are choosing a 'b for the inner param.
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☔ The latest upstream changes (presumably #102306) made this pull request unmergeable. Please resolve the merge conflicts. |
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Finished benchmarking commit (307dd93): comparison URL. Overall result: no relevant changes - no action needed@rustbot label: -perf-regression Instruction countThis benchmark run did not return any relevant results for this metric. Max RSS (memory usage)This benchmark run did not return any relevant results for this metric. CyclesThis benchmark run did not return any relevant results for this metric. |
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Do not overwrite lifetime binders for another HirId. This PR makes higher-ranked bounds in where clauses a bit more principled. We used to conflate `for<'a> T: Trait` with `(for<'a> T): Trait`. This PR separates both binders. This caused issued with fn types, which have their own binder, causing us to overwrite the predicates's binders with `fn`'s binders, ICEing. Fixes rust-lang#98594
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This PR makes higher-ranked bounds in where clauses a bit more principled.
We used to conflate
for<'a> T: Traitwith(for<'a> T): Trait.This PR separates both binders.
This caused issued with fn types, which have their own binder, causing us to overwrite the predicates's binders with
fn's binders, ICEing.Fixes #98594