!752

sclass A {
  B b;
  
  class B {
    A a() { ret A.this; }
  }
}

p {
  new A a;
  A.B b = a.new B;
  a.b = b;
  
  S s = structure(b);
  print(s);
  b = (A.B) unstructure(s);
  assertNotNull("b.a", b.a());
  
  s = structure(a);
  print(s);
  a = (A) unstructure(s);
  assertNotNull("a", a);
  assertNotNull("a.b", a.b);
  assertSame("a.b.a", a, a.b.a());
}