struct PtrNilFoo {
    x int
}

fn test_struct_pointer_comparison_with_nil_is_nil_safe() {
    p := &PtrNilFoo{
        x: 42
    }
    same_value := &PtrNilFoo{
        x: 42
    }
    other := &PtrNilFoo{
        x: 7
    }
    nil_p := unsafe { &PtrNilFoo(nil) }
    nil_q := unsafe { &PtrNilFoo(nil) }

    assert p == same_value
    assert p != other
    assert p != nil_p
    assert nil_p != p
    assert nil_p == nil_q
}