【unity】Unity Error: An infinite import loop has been detected

Unity Error: An infinite import loop has been detected.

ERROR
An infinite import loop has been detected. The following Assets were imported multiple times, but no changes to them have been detected. Please check if any custom code is trying to import them:

原因
可能是解析Jar包解析到一半，没删掉旧的文件又重新开始解析。

解决办法：
关闭Unity，删除Unity工程的Library目录，重新打开工程。