error[E0277]: the trait bound `T: Clone` is not satisfied
  --> $DIR/bounds-are-checked-2.rs:6:13
   |
LL | type X<T> = impl Clone;
   |             ^^^^^^^^^^ the trait `Clone` is not implemented for `T`
   |
help: consider restricting type parameter `T`
   |
LL | type X<T: Clone> = impl Clone;
   |         ^^^^^^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0277`.