error[E0308]: mismatched types --> $DIR/issue-13466.rs:8:9 | LL | let _x: usize = match Some(1) { | ------- this expression has type `Option<{integer}>` LL | Ok(u) => u, | ^^^^^ expected enum `Option`, found enum `std::result::Result` | = note: expected enum `Option<{integer}>` found enum `std::result::Result<_, _>` error[E0308]: mismatched types --> $DIR/issue-13466.rs:14:9 | LL | let _x: usize = match Some(1) { | ------- this expression has type `Option<{integer}>` ... LL | Err(e) => panic!(e) | ^^^^^^ expected enum `Option`, found enum `std::result::Result` | = note: expected enum `Option<{integer}>` found enum `std::result::Result<_, _>` error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0308`.