//# run
main() {
    let x: u64;
label b0:
    x = 0;
label while:
    jump_if_false (copy(x) < 5) while_cont;
label while_b0:
    x = copy(x) + 1;
    jump while;
label while_cont:
    assert(move(x) == 5, 42);
    return;
}