error[E0308]: `if` and `else` have incompatible types --> $DIR/dont-suggest-box-on-empty-else-arm.rs:4:12 | LL | if true { | ------- `if` and `else` have incompatible types LL | "boo2" | ------ expected because of this LL | } else { | ____________^ LL | | LL | | } | |_____^ expected `&str`, found `()` error: aborting due to previous error For more information about this error, try `rustc --explain E0308`.