Git & Paramiko: failed to push some refs to ...

If you prefer you can see the outline of my question at stackoverflow, with better formatting than e-mail will afford:

http://stackoverflow.com/questions/3262161/git-failed-to-push-some-refs-to-with-custom-git-bridge

I am writing a Python ssh server using Paramiko. While it is very powerful software, when using it to push git repositories, I run into strange errors. The following is git's output on the client machine.

$ git push origin master
Counting objects: 5, done.
Delta compression using up to 2 threads.
Compressing objects: 100% (2/2), done.
Writing objects: 100% (3/3), 263 bytes, done.
Total 3 (delta 1), reused 0 (delta 0)
To git@localhost:/pckprojects/heyworld/
   d83f744..404debd  master -> master
error: failed to push some refs to 'git@localhost:/pckprojects/heyworld/'

From the server side I have enough print statements to see the entire transaction, which looks something like this:

git-receive-pack /home/www/data/project/heyworld/

OUT >> 00721ee2436e45c80236878132dc87d9e9fee6a81de5 refs/heads/master\x00 report-status delete-refs side-band-64k ofs-delta\n0000

IN >> 00841ee2436e45c80236878132dc87d9e9fee6a81de5 6054b3358787bafd1d96c0fdfbf016d620ccdf09 refs/heads/master\x00 report-status side-band-64k0000

IN >> PACK\x00\x00\x00\x02\x00\x00\x00\x03\x96\x0ex\x9c\xa5\x8cM\x0e\xc2 \x14\x06\xf7\x9c\x82\x0b\xd8<(?\x8f\xc4\x18\xf7n\xbc\x02\xc2\x87%\x16\xdb4\xb8\xf0\xf66\xbd\x82\xcb\x99d\xa6o\x80\x846\xd9!)\x1b\x0b\xb1\r1$dO\x05\xa6\xb0\xa3@\x06%D<\xb2\x16k\xdc\xf0\xeeRa/F\x07c\x13\x93\x1e\x1d{V\xa3\xce\x89}\x0e\x08\x05p\x91U\x86\x15\xf1\xd3\xa7e\x93\xf7\xa9\xceu\x95\xb7\xda\x1a\xbe\xf2\xbc\x1e8\xbc\x0e\xbc>[\xac\xf3\x90\x96v\x91J\xfb`X\xb3V\xf2D\x96H\xec\xb6\xd5\xde\xf1\xc7B4,\xe2\x07\xff\x8aF\xba\xaf\x01x\x9c340031Q\xc8H\xaddP\xd8P\xfcmzGg\x8aY\xc4\x8e\xad\xb1<\xca\x1b\xa3\x93\xee\xbd\x05\x00\xa8\xb4\x0c\x9by\xd3\xfe\xa0C\x86fU\x18\xbe\xa5\x86\xac5*\xf7\x11\x89\x8b9$x\x9c\x0b\x8b\x9a\x10\xc6\x92\x9b\x9a\xcf\x05\x00\x0f\xb2\x02\xe6=\x12?\xde\x1f\x9a=v\x0c3c\xf66\xc6\xcc1y\xe4\xb8\xa0

OUT >> 0030\x01000eunpack ok\n009krf/ed/atr0000

CLOSE CONNECTION

This looks healthy to me, but I'm of course not that familiar with the details. In addition, as far as I can tell, master does in fact get updated and everything properly, so I have no idea where that error message is coming from. If I use openssh-server instead of my Paramiko server, the same actions on the client work fine.

Thanks for the help!

Sincerely, Philip Kimmey