error[E0277]: the trait bound `u32: Trait` is not satisfied --> $DIR/trait_objects_fail.rs:26:9 | LL | foo(&10_u32); | ^^^^^^^ the trait `Trait` is not implemented for `u32` | = help: the trait `Trait<2>` is implemented for `u32` = note: required for the cast from `&u32` to `&dyn Trait` error[E0277]: the trait bound `bool: Traitor<_>` is not satisfied --> $DIR/trait_objects_fail.rs:28:9 | LL | bar(&true); | ^^^^^ the trait `Traitor<_>` is not implemented for `bool` | = help: the trait `Traitor<2, 3>` is implemented for `bool` = note: required for the cast from `&bool` to `&dyn Traitor<_>` error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0277`.