error[E0767]: use of unreachable label `'a` --> $DIR/E0767.rs:4:26 | LL | 'a: loop { | -- unreachable label defined here LL | || { LL | loop { break 'a; } | ^^ unreachable label `'a` | = note: labels are unreachable through functions, closures, async blocks and modules error: aborting due to previous error For more information about this error, try `rustc --explain E0767`.