error: non-defining opaque type use in defining scope
  --> $DIR/generic_duplicate_param_use.rs:13:30
   |
LL | fn one_ty<T: Debug>(t: T) -> TwoTys<T, T> {
   |                              ^^^^^^^^^^^^
   |
note: type used multiple times
  --> $DIR/generic_duplicate_param_use.rs:9:13
   |
LL | type TwoTys<T, U> = impl Debug;
   |             ^  ^

error: non-defining opaque type use in defining scope
  --> $DIR/generic_duplicate_param_use.rs:18:36
   |
LL | fn one_lifetime<'a>(t: &'a u32) -> TwoLifetimes<'a, 'a> {
   |                                    ^^^^^^^^^^^^^^^^^^^^
   |
note: lifetime used multiple times
  --> $DIR/generic_duplicate_param_use.rs:10:19
   |
LL | type TwoLifetimes<'a, 'b> = impl Debug;
   |                   ^^  ^^

error: non-defining opaque type use in defining scope
  --> $DIR/generic_duplicate_param_use.rs:23:50
   |
LL | fn one_const<const N: usize>(t: *mut [u8; N]) -> TwoConsts<N, N> {
   |                                                  ^^^^^^^^^^^^^^^
   |
note: constant used multiple times
  --> $DIR/generic_duplicate_param_use.rs:11:22
   |
LL | type TwoConsts<const X: usize, const Y: usize> = impl Debug;
   |                      ^               ^

error: aborting due to 3 previous errors