error[E0308]: `match` arms have incompatible types --> $DIR/single-line.rs:2:52 | LL | let _ = match Some(42) { Some(x) => x, None => "" }; | -------------- - ^^ expected integer, found `&str` | | | | | this is found to be of type `{integer}` | `match` arms have incompatible types error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0308`.