message: Silence __del__ exceptions
  We have tests that they do their job, so printing exceptions is pointless
diff: @@ -1763,9 +1763,12 @@ class _PolymorphicFunctionGarbageCollector(object):
  def __del__(self):
  if func_graph_module is None or memory is None:
  return
  + try:
  while self._cache:
  self._cache.popitem()
  memory.dismantle_ordered_dict(self._cache)
  + except: # pylint: disable=bare-except
  + pass
  class _FunctionGarbageCollector(object):
  @@ -1781,4 +1784,7 @@ class _FunctionGarbageCollector(object):
  def __del__(self):
  if func_graph_module is None or memory is None or self._func_graph is None:
  return
  + try:
  func_graph_module.dismantle_func_graph(self._func_graph)
  + except: # pylint: disable=bare-except
  + pass
  