error[E0277]: the trait bound `Foo: HasComponent<()>` is not satisfied --> $DIR/issue-91594.rs:10:1 | LL | impl HasComponent<>::Interface> for Foo {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `HasComponent<()>` is not implemented for `Foo` | = help: the trait `HasComponent<>::Interface>` is implemented for `Foo` note: required for `Foo` to implement `Component` --> $DIR/issue-91594.rs:13:27 | LL | impl> Component for Foo { | ^^^^^^^^^^^^ ^^^ error: aborting due to previous error For more information about this error, try `rustc --explain E0277`.