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ty::Error does not match other types for region constraints

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This commit is contained in:
Michael Goulet 2022-08-17 17:23:52 +00:00
parent 86c6ebee8f
commit fc7fc0fae5
3 changed files with 36 additions and 1 deletions
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9
compiler/rustc_infer/src/infer/outlives/test_type_match.rs
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@ -174,7 +174,14 @@ impl<'tcx> TypeRelation<'tcx> for Match<'tcx> {
#[instrument(skip(self), level = "debug")]
fn tys(&mut self, pattern: Ty<'tcx>, value: Ty<'tcx>) -> RelateResult<'tcx, Ty<'tcx>> {
if pattern == value { Ok(pattern) } else { relate::super_relate_tys(self, pattern, value) }
if let ty::Error(_) = pattern.kind() {
// Unlike normal `TypeRelation` rules, `ty::Error` does not equal any type.
self.no_match()
} else if pattern == value {
Ok(pattern)
} else {
relate::super_relate_tys(self, pattern, value)
}
}
#[instrument(skip(self), level = "debug")]