error[E0277]: the trait bound `T: Copy` is not satisfied
  --> $DIR/wf-trait-associated-type-bound.rs:10:17
   |
LL | trait ExtraCopy<T:Copy> { }
   |                   ---- required by this bound in `ExtraCopy`
...
LL |     type Type1: ExtraCopy<T>;
   |                 ^^^^^^^^^^^^ the trait `Copy` is not implemented for `T`
   |
help: consider restricting type parameter `T`
   |
LL | trait SomeTrait<T: std::marker::Copy> {
   |                  ^^^^^^^^^^^^^^^^^^^

error: aborting due to previous error

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