bjoernager/rust
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unconstrained region vars: do not ICE ICE baby

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This commit is contained in:
lcnr 2023-09-05 11:10:00 +02:00
parent 8cfaf70c32
commit 98fa0c93ee
3 changed files with 53 additions and 9 deletions
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14
compiler/rustc_trait_selection/src/traits/outlives_bounds.rs
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@ -57,16 +57,12 @@ impl<'a, 'tcx: 'a> InferCtxtExt<'a, 'tcx> for InferCtxt<'tcx> {
let ty = OpportunisticRegionResolver::new(self).fold_ty(ty);
// We do not expect existential variables in implied bounds.
// We may however encounter unconstrained lifetime variables in invalid
// code. See #110161 for context.
// We may however encounter unconstrained lifetime variables
// in very rare cases.
//
// See `ui/implied-bounds/implied-bounds-unconstrained-2.rs` for
// an example.
assert!(!ty.has_non_region_infer());
if ty.has_infer() {
self.tcx.sess.delay_span_bug(
self.tcx.def_span(body_id),
"skipped implied_outlives_bounds due to unconstrained lifetimes",
);
return vec![];
}
let mut canonical_var_values = OriginalQueryValues::default();
let canonical_ty =