1 error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
2 --> $DIR/wf-in-fn-type-ret.rs:19:5
4 LL | x: fn() -> MustBeCopy<T> //~ ERROR E0277
5 | ^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `T`
7 = help: consider adding a `where T: std::marker::Copy` bound
8 note: required by `MustBeCopy`
9 --> $DIR/wf-in-fn-type-ret.rs:13:1
11 LL | struct MustBeCopy<T:Copy> {
12 | ^^^^^^^^^^^^^^^^^^^^^^^^^
14 error: aborting due to previous error
16 For more information about this error, try `rustc --explain E0277`.