error[E0107]: this type alias takes 1 lifetime argument but 2 lifetime arguments were supplied --> $DIR/mismatched_arg_count.rs:9:29 | LL | fn bar<'a, T: Trait<'a>>(_: Alias<'a, 'a, T>) {} | ^^^^^ -- help: remove this lifetime argument | | | expected 1 lifetime argument | note: type alias defined here, with 1 lifetime parameter: `'a` --> $DIR/mismatched_arg_count.rs:7:6 | LL | type Alias<'a, T> = >::Assoc; | ^^^^^ -- error: aborting due to previous error For more information about this error, try `rustc --explain E0107`.