error[E0308]: mismatched types --> $DIR/issue-13466.rs:18:9 | LL | Ok(u) => u, | ^^^^^ expected enum `std::option::Option`, found enum `std::result::Result` | = note: expected type `std::option::Option<{integer}>` found type `std::result::Result<_, _>` error[E0308]: mismatched types --> $DIR/issue-13466.rs:24:9 | LL | Err(e) => panic!(e) | ^^^^^^ expected enum `std::option::Option`, found enum `std::result::Result` | = note: expected type `std::option::Option<{integer}>` found type `std::result::Result<_, _>` error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0308`.