diff options
| -rw-r--r-- | compiler/rustc_mir_transform/src/reveal_all.rs | 5 | ||||
| -rw-r--r-- | src/test/ui/mir/issue-91745.rs | 21 |
2 files changed, 25 insertions, 1 deletions
diff --git a/compiler/rustc_mir_transform/src/reveal_all.rs b/compiler/rustc_mir_transform/src/reveal_all.rs index a717dd3e0cd..ee661793a44 100644 --- a/compiler/rustc_mir_transform/src/reveal_all.rs +++ b/compiler/rustc_mir_transform/src/reveal_all.rs @@ -36,6 +36,9 @@ impl<'tcx> MutVisitor<'tcx> for RevealAllVisitor<'tcx> { #[inline] fn visit_ty(&mut self, ty: &mut Ty<'tcx>, _: TyContext) { - *ty = self.tcx.normalize_erasing_regions(self.param_env, ty); + // We have to use `try_normalize_erasing_regions` here, since it's + // possible that we visit impossible-to-satisfy where clauses here, + // see #91745 + *ty = self.tcx.try_normalize_erasing_regions(self.param_env, *ty).unwrap_or(ty); } } diff --git a/src/test/ui/mir/issue-91745.rs b/src/test/ui/mir/issue-91745.rs new file mode 100644 index 00000000000..ca3d66b1c8e --- /dev/null +++ b/src/test/ui/mir/issue-91745.rs @@ -0,0 +1,21 @@ +// check-pass + +pub trait Foo { + type Bar; +} + +pub trait Broken { + type Assoc; + fn broken(&self) where Self::Assoc: Foo; +} + +impl<T> Broken for T { + type Assoc = (); + fn broken(&self) where Self::Assoc: Foo { + let _x: <Self::Assoc as Foo>::Bar; + } +} + +fn main() { + let _m: &dyn Broken<Assoc=()> = &(); +} |