.
Thread 1 (process 11691):
#0  0xb794b24b in pkgDepCache::CheckDep ()
   from /usr/lib/libapt-pkg-libc6.4-6.so.3.53
#1  0xb794c2c1 in pkgDepCache::DependencyState ()
   from /usr/lib/libapt-pkg-libc6.4-6.so.3.53
#2  0xb794e84d in pkgDepCache::Update ()
   from /usr/lib/libapt-pkg-libc6.4-6.so.3.53
#3  0xb794ef36 in pkgDepCache::Init ()
   from /usr/lib/libapt-pkg-libc6.4-6.so.3.53
#4  0xb797067c in pkgCacheFile::Open ()
   from /usr/lib/libapt-pkg-libc6.4-6.so.3.53
#5  0xb79f3340 in TmpGetCache ()
   from /usr/lib/python2.5/site-packages/apt_pkg.so
#6  0x080c508c in PyEval_EvalFrameEx ()
#7  0x080c62e5 in PyEval_EvalCodeEx ()
#8  0x080c6357 in PyEval_EvalCode ()
#9  0x080e5b98 in PyRun_FileExFlags ()
#10 0x080e5e27 in PyRun_SimpleFileExFlags ()
#11 0x08059310 in Py_Main ()
#12 0x08058842 in main ()