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Delay a bug if we try and fail to relate an opaque to itself in TypeRelating

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This commit is contained in:
Michael Goulet 2022-08-10 03:36:05 +00:00
parent 28b6373b1d
commit 534426d0f3
1 changed files with 4 additions and 0 deletions
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4
compiler/rustc_infer/src/infer/nll_relate/mod.rs
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@ -599,6 +599,10 @@ fn tys(&mut self, a: Ty<'tcx>, mut b: Ty<'tcx>) -> RelateResult<'tcx, Ty<'tcx>>
(&ty::Opaque(a_def_id, _), &ty::Opaque(b_def_id, _)) if a_def_id == b_def_id => { (&ty::Opaque(a_def_id, _), &ty::Opaque(b_def_id, _)) if a_def_id == b_def_id => {
infcx.commit_if_ok(|_| infcx.super_combine_tys(self, a, b)).or_else(|err| { infcx.commit_if_ok(|_| infcx.super_combine_tys(self, a, b)).or_else(|err| {
self.tcx().sess.delay_span_bug(
self.delegate.span(),
"failure to relate an opaque to itself should result in an error later on",
);
if a_def_id.is_local() { self.relate_opaques(a, b) } else { Err(err) } if a_def_id.is_local() { self.relate_opaques(a, b) } else { Err(err) }
}) })
} }