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Equality of regions is not just on identity, but if both regions outlive each other

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This commit is contained in:
Oli Scherer 2021-09-24 17:32:58 +00:00
parent 6f71cab3b0
commit 07b8bbb1f6
1 changed files with 9 additions and 1 deletions
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10
compiler/rustc_infer/src/infer/lexical_region_resolve/mod.rs
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@ -637,7 +637,15 @@ impl<'cx, 'tcx> LexicalResolver<'cx, 'tcx> {
.choice_regions .choice_regions
.iter() .iter()
.map(|&choice_region| var_data.normalize(self.tcx(), choice_region)); .map(|&choice_region| var_data.normalize(self.tcx(), choice_region));
if !choice_regions.clone().any(|choice_region| member_region == choice_region) { let fr = &self.region_rels.free_regions;
let sub = |a, b| {
fr.is_free_or_static(a)
&& fr.is_free_or_static(b)
&& fr.sub_free_regions(self.tcx(), a, b)
};
if !choice_regions.clone().any(|choice_region| {
sub(member_region, choice_region) && sub(choice_region, member_region)
}) {
let span = self.tcx().def_span(member_constraint.opaque_type_def_id); let span = self.tcx().def_span(member_constraint.opaque_type_def_id);
errors.push(RegionResolutionError::MemberConstraintFailure { errors.push(RegionResolutionError::MemberConstraintFailure {
span, span,