error: type parameter `T` is part of concrete type but not used in parameter list for the `impl Trait` type alias | |
--> $DIR/issue-55872.rs:14:28 | |
| | |
LL | fn foo<T>() -> Self::E { | |
| ____________________________^ | |
LL | | | |
LL | | || () | |
LL | | } | |
| |_____^ | |
error: aborting due to previous error | |