(Mosty harmless) protocol error when pushing

I am not sure whether this has been reported before. I follow this mailing list, but I don't read all emails in detail, so I could have missed a bug report or a fix for the problem.

Anyway, what seems to happen is that some protocol error happens when an automatic GC is triggered during a push. The push succeeded, despite the error messages.

My version of git is 1.7.1.86.g0e460. Here is what happened (I force-pushed a single branch):

Counting objects: 270, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (71/71), done.
Writing objects: 100% (184/184), 151.33 KiB, done.
Total 184 (delta 157), reused 134 (delta 113)
Auto packing the repository for optimum performance.
fatal: protocol error: bad line length character: Remo
error: error in sideband demultiplexer
To git@github.com:bjorng/otp.git
 + 7651a63...874192d bg/nif_error -> bg/nif_error (forced update)
error: failed to push some refs to 'git@github.com:bjorng/otp.git'