E0767 - Error codes index
Description: Book listing all Rust error codes

# Error code E0767

An unreachable label was used.

Erroneous code example:

    #![allow(unused)]
    fn main() {
    'a: loop {
        || {
            loop { break 'a } // error: use of unreachable label `'a`
        };
    }
    }

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

    #![allow(unused)]
    fn main() {
    'a: loop {
        break 'a; // ok!
    }
    }