error[E0080]: evaluation of constant value failed
  --> $DIR/ctfe-labelled-loop.rs:6:5
   |
LL | /     'mylabel: loop {
LL | |         if i > n {
LL | |             break 'mylabel
LL | |         }
LL | |         i += 1;
LL | |     }
   | |_____^ exceeded interpreter step limit (see `#[const_eval_limit]`)
   |
note: inside `labelled_loop`
  --> $DIR/ctfe-labelled-loop.rs:6:5
   |
LL | /     'mylabel: loop {
LL | |         if i > n {
LL | |             break 'mylabel
LL | |         }
LL | |         i += 1;
LL | |     }
   | |_____^
note: inside `X`
  --> $DIR/ctfe-labelled-loop.rs:15:16
   |
LL | const X: u32 = labelled_loop(19);
   |                ^^^^^^^^^^^^^^^^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0080`.