Fatal git error on .git/modules/libffi-tarballs

[Edward Z. Yang]

Hello Karel,

You should blow away your copy (well, preserve the patches), upgrade
your version of Git and then check out again.  You've run into
this bug:

    http://comments.gmane.org/gmane.comp.version-control.git/193492

Cheers,
Edward

Excerpts from Karel Gardas's message of 2014-07-20 18:55:08 +0100:
> 
> Hello,
> 
> while working on HEAD and after a few iteraction of ./validate my git 
> complains with:
> 
> $ git status
> fatal: Not a git repository: 
> /export/home/karel/vcs/ghc-src/ghc-git-test-2/.git/modules/libffi-tarballs
> karel at silence:~/vcs/ghc-src/ghc-solaris-validate-fix$
> 
> Is this a known error or is there any known workaround for this issue?
> 
> Thanks!
> Karel