error[E0426]: use of undeclared label `'b` --> $DIR/issue-28109.rs:6:9 | LL | 'b | ^^ undeclared label `'b` error[E0426]: use of undeclared label `'c` --> $DIR/issue-28109.rs:9:9 | LL | 'c | ^^ undeclared label `'c` error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0426`.