Cloning empty Vec does not create a new Vec instance

[bitzoic]

When creating a new Vec, no new ptr is created and therefor the following fails:

#[test]
fn test_clone() {
    let vec_1: Vec<u64> = Vec::new();
    let vec_2: Vec<u64> = Vec::new();
    let vec_3: Vec<u64> = vec_1.clone();

    assert(vec_1.ptr() != vec_2.ptr()); // This fails
    assert(vec_1.ptr() != vec_3.ptr()); // This fails
}