tests/ui/type-alias-impl-trait/issue-68368-non-defining-use.stderr

   1 error[E0792]: expected generic type parameter, found `()`
   2   --> $DIR/issue-68368-non-defining-use.rs:9:29
   3    |
   4 LL | type Alias<'a, U> = impl Trait<U>;
   5    |                - this generic parameter must be used with a generic type parameter
   6 LL |
   7 LL | fn f<'a>() -> Alias<'a, ()> {}
   8    |                             ^^
   9
  10 error: aborting due to previous error
  11
  12 For more information about this error, try `rustc --explain E0792`.