src/test/ui/type-alias-impl-trait/issue-68368-non-defining-use.rs

   1 // Regression test for issue #68368
   2 // Ensures that we don't ICE when emitting an error
   3 // for a non-defining use when lifetimes are involved
   4
   5 #![feature(type_alias_impl_trait)]
   6 trait Trait<T> {}
   7 type Alias<'a, U> = impl Trait<U>;
   8 fn f<'a>() -> Alias<'a, ()> {}
   9 //~^ ERROR non-defining opaque type use in defining scope
  10
  11 fn main() {}
  12
  13 impl Trait<()> for () {}