(gdb) run
Starting program: /usr/bin/apt-get install kdebase
[New Thread 1024 (LWP 20696)]
Reading Package Lists... Done
Building Dependency Tree... Done

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1024 (LWP 20696)]
0x4009d1ea in pkgProblemResolver::Resolve(bool) (this=0xbffff420,
    BrokenFix=true) at algorithms.cc:960
warning: Source file is more recent than executable.

960                    if (Scores[I->ID] <= Scores[Pkg->ID] ||
(gdb) p I
$4 = {Pkg = 0x0, Owner = 0x407e9874, HashIndex = 0}
(gdb) p Pkg
$5 = {Pkg = 0x407b87d0, Owner = 0x807fd10, HashIndex = 0}
(gdb) bt
#0  0x4009d1ea in pkgProblemResolver::Resolve(bool) (this=0xbffff420,
    BrokenFix=true) at algorithms.cc:960
#1  0x08056e80 in DoInstall(CommandLine&) (CmdL=@0xbffff4f0) at apt-get.cc:1626
#2  0x4007f4d5 in CommandLine::DispatchArg(CommandLine::Dispatch*, bool) (
    this=0xbffff4f0, Map=0xbffff500, NoMatch=true) at contrib/cmndline.cc:340
#3  0x0805af65 in main (argc=3, argv=0xbffff844) at apt-get.cc:2539
#4  0x40290662 in __libc_start_main () from /lib/libc.so.6