//# run
main() {
    let x: u64;
    let y: u64;
label b0:
    jump_if (true) b2;
label b1:
    assert(false, 42);
    jump b3;
label b2:
    x = 5;
label b3:
    jump_if_false (true) b5;
label b4:
    y = 5;
label b5:
    assert(copy(x) == copy(y), 42); // invalid copy
    return;
}