Error code E0767

An unreachable label was used.

Erroneous code example:

'a: loop {
    || {
        loop { break 'a } // error: use of unreachable label `'a`
    };
}
Run

Ensure that the label is within scope. Labels are not reachable through functions, closures, async blocks or modules. Example:

'a: loop {
    break 'a; // ok!
}
Run

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