src/test/ui/type-alias-impl-trait/generic_duplicate_param_use4.stderr

   1 error: non-defining opaque type use in defining scope
   2   --> $DIR/generic_duplicate_param_use4.rs:11:27
   3    |
   4 LL | fn one<T: Debug>(t: T) -> Two<T, T> {
   5    |                           ^^^^^^^^^
   6    |
   7 note: type used multiple times
   8   --> $DIR/generic_duplicate_param_use4.rs:8:10
   9    |
  10 LL | type Two<T, U> = impl Debug;
  11    |          ^  ^
  12
  13 error[E0277]: `U` doesn't implement `Debug`
  14   --> $DIR/generic_duplicate_param_use4.rs:8:18
  15    |
  16 LL | type Two<T, U> = impl Debug;
  17    |                  ^^^^^^^^^^ `U` cannot be formatted using `{:?}` because it doesn't implement `Debug`
  18    |
  19 help: consider restricting type parameter `U`
  20    |
  21 LL | type Two<T, U: std::fmt::Debug> = impl Debug;
  22    |              +++++++++++++++++
  23
  24 error: aborting due to 2 previous errors
  25
  26 For more information about this error, try `rustc --explain E0277`.