error[E0426]: use of undeclared label `'L`
  --> $DIR/issue-50576.rs:2:23
   |
LL |     |bool: [u8; break 'L]| 0;
   |                       ^^ undeclared label `'L`

error[E0268]: `break` outside of a loop
  --> $DIR/issue-50576.rs:2:17
   |
LL |     |bool: [u8; break 'L]| 0;
   |                 ^^^^^^^^ cannot `break` outside of a loop

error[E0268]: `break` outside of a loop
  --> $DIR/issue-50576.rs:5:16
   |
LL |     Vec::<[u8; break]>::new();
   |                ^^^^^ cannot `break` outside of a loop

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0268, E0426.
For more information about an error, try `rustc --explain E0268`.