error[E0767]: use of unreachable label `'a` --> $DIR/E0767.rs:5:26 | LL | 'a: loop { | -- unreachable label defined here ... LL | loop { break 'a; } | ^^ unreachable label `'a` | = note: labels are unreachable through functions, closures, async blocks and modules error[E0308]: mismatched types --> $DIR/E0767.rs:3:9 | LL | / || { LL | | LL | | loop { break 'a; } LL | | } | |_________^ expected `()`, found closure | = note: expected unit type `()` found closure `[closure@$DIR/E0767.rs:3:9: 3:11]` error: aborting due to 2 previous errors Some errors have detailed explanations: E0308, E0767. For more information about an error, try `rustc --explain E0308`.