error[E0277]: the trait bound `(): MyTrait` is not satisfied --> $DIR/no-use.rs:11:6 | LL | <() as MyTrait>::foo(&()); | ^^ the trait `MyTrait` is not implemented for `()` | = help: the trait `MyTrait` is implemented for `()` error: aborting due to previous error For more information about this error, try `rustc --explain E0277`.