error[E0277]: the trait bound `String: Copy` is not satisfied
  --> $DIR/own-bound-span.rs:14:24
   |
LL |     let _: <S as D>::P<String>;
   |                        ^^^^^^ the trait `Copy` is not implemented for `String`
   |
note: required by a bound in `D::P`
  --> $DIR/own-bound-span.rs:4:15
   |
LL |     type P<T: Copy>;
   |               ^^^^ required by this bound in `D::P`

error: aborting due to previous error

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