error[E0277]: the trait bound `<Self as SomeTrait>::Type1: std::marker::Copy` is not satisfied
  --> $DIR/wf-trait-associated-type-trait.rs:11:5
   |
LL | struct IsCopy<T:Copy> { x: T }
   | --------------------- required by `IsCopy`
...
LL |     type Type2 = IsCopy<Self::Type1>;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `<Self as SomeTrait>::Type1`
   |
   = help: consider adding a `where <Self as SomeTrait>::Type1: std::marker::Copy` bound

error: aborting due to previous error

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