| `break` or `continue` must include a label when used in the condition of a | |
| `while` loop. | |
| Example of erroneous code: | |
| ```compile_fail | |
| while break {} | |
| ``` | |
| To fix this, add a label specifying which loop is being broken out of: | |
| ``` | |
| 'foo: while break 'foo {} | |
| ``` |