//# run
main() {
    let v: u64;
    let ref_v: &mut u64;
    let dead: u64;
label b0:
    v = 5;
    ref_v = &mut v;
    assert(*copy(ref_v) == 5, 42);
    dead = move(v); // cannot move local, still borrowed
    *move(ref_v) = 42;
    return;
}