Using an invalidated iterator is undefined, and likely to lead to the same kinds of problems as using a dangling pointer.

使用无效迭代器是没有定义的，可能会导致与悬垂指针相同的问题。

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Any use of an invalidated iterator is likely to yield a run-time error, but there is no guarantee that the program will crash or otherwise make it easy to detect the problem.

任何无效迭代器的使用都可能导致运行时错误，但程序不一定会崩溃，否则检查这种错误也许会容易些。

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