'Ensure that a reference loop involving a dict doesn\'t lead proxyval
into an infinite loop:'

def test_selfreferential_dict(self):

    (gdb_repr, gdb_output) = self.get_gdb_repr("a    =    {}    ;    b    =    {'bar':a}    ;    a['foo']    =    b    ;    id(a)")
    self.assertEqual(gdb_repr, "{'foo':    {'bar':    {...}}}")
