.
Thread 1 (process 32341):
#0  0xb7e64566 in pkgProblemResolver::MakeScores ()
   from /usr/lib/libapt-pkg-libc6.7-6.so.4.6
#1  0xb7e66bac in pkgProblemResolver::Resolve ()
   from /usr/lib/libapt-pkg-libc6.7-6.so.4.6
#2  0x08060827 in ?? ()
#3  0xb7e42dcb in CommandLine::DispatchArg ()
   from /usr/lib/libapt-pkg-libc6.7-6.so.4.6
#4  0x0804f06b in ?? ()
#5  0xb7bb7450 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#6  0x0804ce91 in ?? ()