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Delay span bug when we can't map lifetimes back in collect_trait_impl_trait_tys

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This commit is contained in:
Michael Goulet 2022-10-24 18:45:50 +00:00
parent c07a6a9c0c
commit fa5cf90b8d
3 changed files with 47 additions and 2 deletions
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12
compiler/rustc_hir_analysis/src/check/compare_method.rs
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@ -598,8 +598,16 @@ pub fn collect_trait_impl_trait_tys<'tcx>(
let num_impl_substs = tcx.generics_of(impl_m.container_id(tcx)).params.len();
let ty = tcx.fold_regions(ty, |region, _| {
let ty::ReFree(_) = region.kind() else { return region; };
let ty::ReEarlyBound(e) = map[&region.into()].expect_region().kind()
else { bug!("expected ReFree to map to ReEarlyBound"); };
let Some(ty::ReEarlyBound(e)) = map.get(&region.into()).map(|r| r.expect_region().kind())
else {
tcx
.sess
.delay_span_bug(
return_span,
"expected ReFree to map to ReEarlyBound"
);
return tcx.lifetimes.re_static;
};
tcx.mk_region(ty::ReEarlyBound(ty::EarlyBoundRegion {
def_id: e.def_id,
name: e.name,