gcc/testsuite/rust/compile/break2.rs

// ErrorCode::E0571
fn main() {
    let mut a = 1;
    let mut b = 1;

    let mut c;
    while b > 10 {
        if (b == 2) {
            break b; // { dg-error "can only .break. with a value inside a .loop. block" }
        }
        c = a + b;
        a = b;
        b = c;
    }
}