例如，如果您在一个模板例子，或匿名联合体中错误地为操作建模，那么这样的操作应该被弃除。

For example, if you have erroneously modeled operations inside of a template instantiation or an anonymous union, then such operations need to be thrown away.

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如果发生意外错误，并且没有专门建模错误处理程序来处理该错误，则需要该操作。

This is required if an unexpected error occurs and there is no fault handler specifically modeled to handle it.

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