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Re: scandirat return dirents of parent dir

I've already submitted a patch for this but your fix is much
quicker... confirmed this snapshot resolved the problem. Thank you.
>> Hello:
>>      I've found this problem when compile
>> casync(https://github.com/systemd/casync.git) in cygwin,workflow to
>> trigger this :
>>     rootfd=open(".",O_CLOEXEC|O_RDONLY|O_NOCTTY);
>>     scandirat(rootfd,".", firstLevelDirEnts......);
>>     foreach dirent in firstLevelDirEnts:
>>          if dirent is dir:
>>              subdirfd=openat(rootfd,
>>                   dirent->d_name,O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
>>              scandirat(subdirfd,".",  secondLevelDirEnts......);
>>      at this time, secondLevelDirEnts should be files in subdir, but
>> in cygwin, secondLevelDirEnts is just same as firstLevelDirEnts.
>>       This problem didn't happen in linux , nor win10 WSL,  but
>> happens in both cygwin/msys2.
>First I thought you stumbled over the problem that the first two entries
>returned by scandirat are "." and "..", but on closer investigation I
>saw the problem.
>I pushed a fix to the git repo and uploaded new developer snapshots
>to https://cygwin.com/snapshots/  Please try.

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