1 error: non-defining opaque type use in defining scope
2 --> $DIR/issue-68368-non-defining-use.rs:9:29
4 LL | fn f<'a>() -> Alias<'a, ()> {}
7 note: used non-generic type `()` for generic parameter
8 --> $DIR/issue-68368-non-defining-use.rs:7:16
10 LL | type Alias<'a, U> = impl Trait<U>;
13 error: aborting due to previous error