error[E0792]: expected generic lifetime parameter, found `'_`
  --> $DIR/early_bound.rs:7:17
   |
LL | fn test<'a: 'a>(n: bool) -> impl Sized + 'a {
   |                                          -- this generic parameter must be used with a generic lifetime parameter
...
LL |         let _ = identity::<&'a ()>(test(false));
   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: concrete type differs from previous defining opaque type use
  --> $DIR/early_bound.rs:3:29
   |
LL | fn test<'a: 'a>(n: bool) -> impl Sized + 'a {
   |                             ^^^^^^^^^^^^^^^ expected `&()`, got `()`
   |
note: previous use here
  --> $DIR/early_bound.rs:7:36
   |
LL |         let _ = identity::<&'a ()>(test(false));
   |                                    ^^^^^^^^^^^

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0792`.