let x = @int(0);

class foo {
  foo() { }
  foo(foo) { }
  ~foo() {
    x = x + 1;
  }
};
fun operator=(foo! x, foo y) -> foo! { return x; }

struct bar {
  foo f;
  int y;
};

fun yow() -> int@ {
  let b = @bar{ f = @foo(), y = 2 };
  return b.y;
}

fun main() -> int@ {
  let y = yow();
  return x - y;
}