error[E0308]: mismatched types --> $DIR/issue-5500.rs:2:5 | LL | fn main() { | - expected `()` because of default return type LL | &panic!() | ^^^^^^^^^ expected `()`, found `&_` | = note: expected unit type `()` found reference `&_` help: consider removing the borrow | LL - &panic!() LL + panic!() | error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0308`.