error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
  --> $DIR/issue-43784-supertrait.rs:8:9
   |
LL | impl<T> Complete for T {}
   |      -  ^^^^^^^^ the trait `std::marker::Copy` is not implemented for `T`
   |      |
   |      help: consider restricting this bound: `T: std::marker::Copy`

error: aborting due to previous error

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