0.6.3: testing stalls at test_pack (gitdb.test.test_pack.TestPack) ...

Just mentioned that a sweep of builds I ran a few days back got stalled while building for Debian wheezy at

test_pack (gitdb.test.test_pack.TestPack) ...

yet not sure if wheezy specific or sporadic or what... but just wanted to report if may be there are immediate ideas