The rule for propagating errors is: If the process which receives an exit signal, caused by an error, is not trapping exits then the process dies and sends exit signals to all its linked processes.

• 传播错误的规则是：如果一个进程接收到退出信号（可能是由于一个错误引起的），而没有加以捕获，这个进程失效并且发送退出信号给和它相链接的其他进程。