repo sync error: .repo/manifests/: contains uncommitted changes

andorid 源码库同步，报错如标题，好几次想放弃，尝试了网上不少办法，无效，

最终从 stackoverflow 得到答案：

After issued repo sync, I got a error message like error: .repo/manifests/: contains uncommitted changes, but git status or git diff showed nothing changed.

What's cause of the problem and why it happened?

老外的 git status or git diff 没有变化，可我在 .repo/manifests 执行git status 有变化

Answer is :

Find the root cause, all files under .repo/manifests were changed with their filemode, "git config core.filemode false" can fix this "Modify".

翻译过来就是，进入.repo/manifests 目录，然后执行 git config core.filemode false， 问题解决了。