1 error[E0283]: type annotations needed
2 --> $DIR/fallback.rs:24:5
4 LL | fn unconstrained_foo() -> Wrapper<Foo> {
5 | ------------ type must be known at this point
7 | ^^^^^^^^^^^^^^^ cannot infer type of the type parameter `T` declared on the enum `Wrapper`
9 = note: cannot satisfy `_: Copy`
10 help: consider specifying the generic argument
12 LL | Wrapper::<T>::Second
15 error: aborting due to previous error
17 For more information about this error, try `rustc --explain E0283`.