所以要回答你的问题，你必须假定这是实现定义的行为。

So to answer your question, you must assume this is implementation defined behaviour.

youdao

任何自定义的实现都必须考虑这些行为。

Any custom implementation must consider these behaviors.

youdao

如果出现这种情形，通常这些方法的行为是未定义的，虽然这里的具体实现可能会尝试做某些合理的事情。

If it does, the behavior of these methods is undefined in the general case, although this specific implementation attempts to do something reasonable.

youdao