Segfault on exit

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1218496832 (LWP 27614)]
0xb7ac1eb3 in free () from /lib/tls/libc.so.6
(gdb) bt full
#0  0xb7ac1eb3 in free () from /lib/tls/libc.so.6
No symbol table info available.
#1  0xb7c24361 in operator delete () from /usr/lib/gcc/i686-pc-linux-gnu/3.4.4/libstdc++.so.6
No symbol table info available.
#2  0xb7d9c8d9 in ~ListboxTextItem (this=0xb75d9710) at CEGUIListboxTextItem.h:65
No locals.
#3  0xb7d97dc0 in CEGUI::Listbox::resetList_impl (this=0x85a1c08) at stl_vector.h:462
        i = 1
#4  0xb7d97fce in ~Listbox (this=0x85a1c08) at CEGUIListbox.cpp:101
No locals.
#5  0xb7d7e2ab in ~ComboDropList (this=0x85a1c08) at CEGUIComboDropList.cpp:68
No locals.
#6  0xb7d745d5 in CEGUI::ComboDropListFactory::destroyWindow (this=0xb7e942a0, window=0x4) at CEGUIBaseFactories.h:74
No locals.
#7  0xb7d620a7 in CEGUI::WindowManager::cleanDeadPool (this=0x82afa40) at stl_iterator.h:150
        factory = (class CEGUI::WindowFactory *) 0x0
        curr = {<std::iterator<std::random_access_iterator_tag,CEGUI::Window*,ptrdiff_t,CEGUI::Window**,CEGUI::Window*&>> = {<No data fields>}, current = {_M_current = 0x82afdd0}}
#8  0xb7d3fc45 in ~System (this=0xb5e8e088) at CEGUISingleton.h:70
        pt = (utf32 *) 0x1
#9  0xb5f02050 in ~csCEGUIRenderer (this=0xb5e9e010) at ceguirenderer.cpp:101
No locals.
#10 0xb5f077a9 in scfImplementation<csCEGUIRenderer>::DecRef (this=0xb5e9e0d0) at scf_implementation.h:184
No locals.
#11 0x080d0b4a in csObjectRegistry::Clear (this=0xb7f0a9c8) at objreg.cpp:139
        b = (iBase *) 0xb5e9e0d0
        lock = {mutex = 0xb7f0a868}
        i = 34
#12 0x080a908b in csInitializer::DestroyApplication (r=0xb7f0a9dc) at initapp.cpp:493
No locals.
#13 0x080adb24 in ~csApplicationFramework (this=0xbf92d850) at csapplicationframework.cpp:59
No locals.
#14 0x0808e6b1 in ~preClient (this=0xbf92d850) at preClient.cpp:114
No locals.
#15 0x0808d01e in csApplicationRunner<Precursors::preClient>::Run (argc=1, argv=0xbf92d9d4) at csapplicationframework.h:442
        app = {<csApplicationFramework> = {<csInitializer> = {<No data fields>}, _vptr.csApplicationFramework = 0x81aec08, static m_Ptr = 0xbf92d850, static m_FoundationStringName = 0x817dbe0 "crystalspace.libcsappframe", 
    static m_ApplicationStringName = 0x817b640 "gne.Precursors", restartFlag = false, static object_reg = 0xb7f0a9dc}, <csBaseEventHandler> = {_vptr.csBaseEventHandler = 0x81acce8, queue = {obj = 0xb7f17254}, object_registry = 0xb7f0a9dc, self = 77, 
    FrameEvent = 1, PreProcess = 3, Process = 5, PostProcess = 6, FinalProcess = 7, eventh = {obj = 0xb7f0a098}}, g2d = {{obj = 0x0, obj_void = 0x0}}, g3d = {{obj = 0x0, obj_void = 0x0}}, engine = {{obj = 0x0, obj_void = 0x0}}, loader = {{obj = 0x0, 
      obj_void = 0x0}}, vfs = {{obj = 0x0, obj_void = 0x0}}, mouse_driver = {{obj = 0x0, obj_void = 0x0}}, conout = {{obj = 0x0, obj_void = 0x0}}, cdsys = {{obj = 0x0, obj_void = 0x0}}, applicationConfig = {{obj = 0x0, obj_void = 0x0}}, pl = {{
      obj = 0x0, obj_void = 0x0}}, blcpp = {obj = 0x0}, blpython = {{obj = 0x0, obj_void = 0x0}}, contentManager = {{obj = 0x0, obj_void = 0x0}}, windowManager = {{obj = 0x0, obj_void = 0x0}}, dynamics = {{obj = 0x0, obj_void = 0x0}}, cegui = {{
      obj = 0x0, obj_void = 0x0}}, cfgkeyprefix = {<csStringFast<36>> = {<csStringBase> = {_vptr.csStringBase = 0x81acb28, Data = 0x0, Size = 0, MaxSize = 0, GrowBy = 64}, 
      minibuff = "Precursors.\000\000\000\000\000ÈÉ\032\bï\a\000\000Y\222\005\b»§©·ô?··", miniused = 12}, <No data fields>}}
        result = 0
        again = false
#16 0x0808cd81 in main (argc=1, argv=0xbf92d9d4) at main.cpp:55
No locals.
(gdb)