#0  0xb78dad7a in pkgPolicy::GetCandidateVer ()
   from /usr/lib/libapt-pkg-libc6.4-6.so.3.53
#1  0xb78b6dc9 in pkgDepCache::Init ()
   from /usr/lib/libapt-pkg-libc6.4-6.so.3.53
#2  0xb78d867c in pkgCacheFile::Open ()
   from /usr/lib/libapt-pkg-libc6.4-6.so.3.53
#3  0xb795b340 in TmpGetCache ()
   from /usr/lib/python2.5/site-packages/apt_pkg.so
#4  0x080c8b3c in PyEval_EvalFrameEx ()
#5  0x080c9d65 in PyEval_EvalCodeEx ()
#6  0x080c9dd7 in PyEval_EvalCode ()
#7  0x080e91d8 in PyRun_FileExFlags ()
#8  0x080e9467 in PyRun_SimpleFileExFlags ()
#9  0x08059330 in Py_Main ()
#10 0x08058862 in main ()