--- /dev/null
+error[E0277]: the trait bound `u16: Trait` is not satisfied
+ --> $DIR/on-structs-and-enums-in-impls.rs:20:6
+ |
+LL | struct Foo<T:Trait> {
+ | ----- required by this bound in `Foo`
+...
+LL | impl PolyTrait<Foo<u16>> for Struct {
+ | ^^^^^^^^^^^^^^^^^^^ the trait `Trait` is not implemented for `u16`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.