| error: type parameter `T` is part of concrete type but not used in parameter list for the `impl Trait` type alias | |
| --> $DIR/issue-53598.rs:21:42 | |
| | | |
| LL | fn foo<T: Debug>(_: T) -> Self::Item { | |
| | __________________________________________^ | |
| LL | | | |
| LL | | S::<T>(Default::default()) | |
| LL | | } | |
| | |_____^ | |
| error: aborting due to previous error | |