1 error[E0426]: use of undeclared label `'x`
2 --> $DIR/hygienic-label-1.rs:12:19
4 LL | () => { break 'x; } //~ ERROR use of undeclared label `'x`
5 | ^^ did you mean `'x`?
7 LL | 'x: loop { foo!() }
8 | ------ in this macro invocation
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0426`.