error: concrete type differs from previous defining opaque type use
  --> $DIR/early_bound.rs:6:36
   |
LL |         let _ = identity::<&'a ()>(test(false));
   |                                    ^^^^^^^^^^^ expected `()`, got `&()`
   |
note: previous use here
  --> $DIR/early_bound.rs:3:29
   |
LL | fn test<'a: 'a>(n: bool) -> impl Sized + 'a {
   |                             ^^^^^^^^^^^^^^^

error: aborting due to 1 previous error