rustfmt wrongly deletes labels

[cychen2021]

match x {
    0 => 'label: {
        if some_flag {
            break 'label;
        }
        println!("hello");
    }
    _ => { println!("no hello"); }
}

becomes

match x {
    0 => {
        if some_flag {
            break 'label;
        }
        println!("hello");
    }
    _ => { println!("no hello"); }
}

after formatting.

[ytmimi]

Thanks for the report! This is a duplicate of #5676

#5677 is already merged and fixes this issue. All that's left to do now is wait for the next release.