1 error[E0282]: type annotations needed
2 --> $DIR/unconstrained-ref.rs:6:5
5 | ^^^^^^^^^^^^^^ cannot infer type of the type parameter `T` declared on the struct `S`
7 help: consider specifying the generic argument
9 LL | S::<T> { o: &None };
12 error: aborting due to previous error
14 For more information about this error, try `rustc --explain E0282`.