1 error[E0412]: cannot find type `Foo` in this scope
2 --> $DIR/no-extern-crate-in-type.rs:5:22
4 LL | type Output = Option<Foo>;
5 | ^^^ not found in this scope
7 help: consider importing this struct
12 error: aborting due to previous error
14 For more information about this error, try `rustc --explain E0412`.