Program received signal SIGSEGV, Segmentation fault.
0x0021ef8d in sigc::signal_base::impl() const () from /usr/lib/libsigc-2.0.so.0

(gdb) bt
#0  0x0021ef8d in sigc::signal_base::impl() const () from /usr/lib/libsigc-2.0.so.0
#1  0x0021f475 in sigc::signal_base::connect(sigc::slot_base const&) () from /usr/lib/libsigc-2.0.so.0
#2  0x07a88c95 in sigc::signal0<void, sigc::nil>::connect(sigc::slot<void, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil> const&) () from /usr/lib/compiz/libunityshell.so
#3  0x07a86582 in UnityScreen::UnityScreen(CompScreen*) () from /usr/lib/compiz/libunityshell.so
#4  0x07a8f407 in CompPlugin::VTableForScreenAndWindow<UnityScreen, UnityWindow>::initScreen(CompScreen*) ()
   from /usr/lib/compiz/libunityshell.so
#5  0x080fbc95 in initPlugin (p=0x8a16168) at /build/buildd/compiz-0.9.2.1+glibmainloop2/src/plugin.cpp:280
#6  0x080fcae0 in CompPlugin::push (p=0x8a16168) at /build/buildd/compiz-0.9.2.1+glibmainloop2/src/plugin.cpp:494
#7  0x080b5a23 in PrivateScreen::updatePlugins (this=0x880d530)
    at /build/buildd/compiz-0.9.2.1+glibmainloop2/src/screen.cpp:856
#8  0x080b5500 in PrivateScreen::processEvents (this=0x880d530)
    at /build/buildd/compiz-0.9.2.1+glibmainloop2/src/screen.cpp:753
#9  0x080b39a6 in CompEventSource::callback (this=0x88403d8) at /build/buildd/compiz-0.9.2.1+glibmainloop2/src/screen.cpp:153
#10 0x080d3d66 in sigc::bound_mem_functor0<bool, CompEventSource>::operator() (this=0x88446d4)
    at /usr/include/sigc++-2.0/sigc++/functors/mem_fun.h:1787
#11 0x080d2e0a in sigc::adaptor_functor<sigc::bound_mem_functor0<bool, CompEventSource> >::operator() (this=0x88446d0)
    at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#12 0x080d0b7a in sigc::internal::slot_call0<sigc::bound_mem_functor0<bool, CompEventSource>, bool>::call_it (rep=0x88446b8)
    at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#13 0x080c5126 in sigc::slot0<bool>::operator() (this=0x88403f8) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:440
#14 0x080b3a2d in CompEventSource::dispatch (this=0x88403d8, slot=0x88403f8)
    at /build/buildd/compiz-0.9.2.1+glibmainloop2/src/screen.cpp:176
#15 0x003cdeb9 in Glib::Source::dispatch_vfunc(_GSource*, int (*)(void*), void*) () from /usr/lib/libglibmm-2.4.so.1
#16 0x0051d4e8 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#17 0x0051dcb0 in g_main_context_iterate.clone.5 () from /lib/libglib-2.0.so.0
#18 0x0051e373 in g_main_loop_run () from /lib/libglib-2.0.so.0
#19 0x003cf3f5 in Glib::MainLoop::run() () from /usr/lib/libglibmm-2.4.so.1
#20 0x080b3b3f in CompScreen::eventLoop (this=0x880d4a8) at /build/buildd/compiz-0.9.2.1+glibmainloop2/src/screen.cpp:191
#21 0x080b0e2f in main (argc=1, argv=0xbfe38d04) at /build/buildd/compiz-0.9.2.1+glibmainloop2/src/main.cpp:272


(gdb) bt full
#0  0x0021ef8d in sigc::signal_base::impl() const () from /usr/lib/libsigc-2.0.so.0
No symbol table info available.
#1  0x0021f475 in sigc::signal_base::connect(sigc::slot_base const&) () from /usr/lib/libsigc-2.0.so.0
No symbol table info available.
#2  0x07a88c95 in sigc::signal0<void, sigc::nil>::connect(sigc::slot<void, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil> const&) () from /usr/lib/compiz/libunityshell.so
No symbol table info available.
#3  0x07a86582 in UnityScreen::UnityScreen(CompScreen*) () from /usr/lib/compiz/libunityshell.so
No symbol table info available.
#4  0x07a8f407 in CompPlugin::VTableForScreenAndWindow<UnityScreen, UnityWindow>::initScreen(CompScreen*) ()
   from /usr/lib/compiz/libunityshell.so
No symbol table info available.
#5  0x080fbc95 in initPlugin (p=0x8a16168) at /build/buildd/compiz-0.9.2.1+glibmainloop2/src/plugin.cpp:280
No locals.
#6  0x080fcae0 in CompPlugin::push (p=0x8a16168) at /build/buildd/compiz-0.9.2.1+glibmainloop2/src/plugin.cpp:494
        name = 0x8a268fc "unityshell"
        insertRet = {first = {_M_node = 0x8a11908}, second = true}
#7  0x080b5a23 in PrivateScreen::updatePlugins (this=0x880d530)
    at /build/buildd/compiz-0.9.2.1+glibmainloop2/src/screen.cpp:856
        pp = 0x8a16168
        _foreach_continue852 = false
        _foreach_end852 = @0xbfe387f0
        _foreach_cur852 = @0xbfe387f4
        _foreach_col852 = @0xbfe387f8
        i = 23
        pop = {<std::_List_base<CompPlugin*, std::allocator<CompPlugin*> >> = {
            _M_impl = {<std::allocator<std::_List_node<CompPlugin*> >> = {<__gnu_cxx::new_allocator<std::_List_node<CompPlugin*> >> = {<No data fields>}, <No data fields>}, _M_node = {_M_next = 0x8a122a0, _M_prev = 0x8a122a0}}}, <No data fields>}
        list = @0x880fccc
        p = 0x0
        nPop = 5
        j = 5
        failedPush = false
#8  0x080b5500 in PrivateScreen::processEvents (this=0x880d530)
    at /build/buildd/compiz-0.9.2.1+glibmainloop2/src/screen.cpp:753
        event = {type = 1810929, xany = {type = 1810929, serial = 1147831, send_event = 143183840, display = 0x1197a9, 
            window = 142690364}, xkey = {type = 1810929, serial = 1147831, send_event = 143183840, display = 0x1197a9, 
            window = 142690364, root = 0, subwindow = 3219360156, time = 18498, x = 1339380, y = 0, x_root = -1075607124, 
            y_root = -1075607224, state = 1276182, keycode = 142690364, same_screen = -1075607128}, xbutton = {type = 1810929, 
            serial = 1147831, send_event = 143183840, display = 0x1197a9, window = 142690364, root = 0, 
            subwindow = 3219360156, time = 18498, x = 1339380, y = 0, x_root = -1075607124, y_root = -1075607224, 
            state = 1276182, button = 142690364, same_screen = -1075607128}, xmotion = {type = 1810929, serial = 1147831, 
            send_event = 143183840, display = 0x1197a9, window = 142690364, root = 0, subwindow = 3219360156, time = 18498, 
            x = 1339380, y = 0, x_root = -1075607124, y_root = -1075607224, state = 1276182, is_hint = 60 '<', 
            same_screen = -1075607128}, xcrossing = {type = 1810929, serial = 1147831, send_event = 143183840, 
            display = 0x1197a9, window = 142690364, root = 0, subwindow = 3219360156, time = 18498, x = 1339380, y = 0, 
            x_root = -1075607124, y_root = -1075607224, mode = 1276182, detail = 142690364, same_screen = -1075607128, 
            focus = 41, state = 144900716}, xfocus = {type = 1810929, serial = 1147831, send_event = 143183840, 
            display = 0x1197a9, window = 142690364, mode = 0, detail = -1075607140}, xexpose = {type = 1810929, 
            serial = 1147831, send_event = 143183840, display = 0x1197a9, window = 142690364, x = 0, y = -1075607140, 
            width = 18498, height = 1339380, count = 0}, xgraphicsexpose = {type = 1810929, serial = 1147831, 
            send_event = 143183840, display = 0x1197a9, drawable = 142690364, x = 0, y = -1075607140, width = 18498, 
            height = 1339380, count = 0, major_code = -1075607124, minor_code = -1075607224}, xnoexpose = {type = 1810929, 
            serial = 1147831, send_event = 143183840, display = 0x1197a9, drawable = 142690364, major_code = 0, 
            minor_code = -1075607140}, xvisibility = {type = 1810929, serial = 1147831, send_event = 143183840, 
            display = 0x1197a9, window = 142690364, state = 0}, xcreatewindow = {type = 1810929, serial = 1147831, 
            send_event = 143183840, display = 0x1197a9, parent = 142690364, window = 0, x = -1075607140, y = 18498, 
            width = 1339380, height = 0, border_width = -1075607124, override_redirect = -1075607224}, xdestroywindow = {
            type = 1810929, serial = 1147831, send_event = 143183840, display = 0x1197a9, event = 142690364, window = 0}, 
          xunmap = {type = 1810929, serial = 1147831, send_event = 143183840, display = 0x1197a9, event = 142690364, 
            window = 0, from_configure = -1075607140}, xmap = {type = 1810929, serial = 1147831, send_event = 143183840, 
            display = 0x1197a9, event = 142690364, window = 0, override_redirect = -1075607140}, xmaprequest = {
            type = 1810929, serial = 1147831, send_event = 143183840, display = 0x1197a9, parent = 142690364, window = 0}, 
          xreparent = {type = 1810929, serial = 1147831, send_event = 143183840, display = 0x1197a9, event = 142690364, 
            window = 0, parent = 3219360156, x = 18498, y = 1339380, override_redirect = 0}, xconfigure = {type = 1810929, 
            serial = 1147831, send_event = 143183840, display = 0x1197a9, event = 142690364, window = 0, x = -1075607140, 
            y = 18498, width = 1339380, height = 0, border_width = -1075607124, above = 3219360072, 
            override_redirect = 1276182}, xgravity = {type = 1810929, serial = 1147831, send_event = 143183840, 
            display = 0x1197a9, event = 142690364, window = 0, x = -1075607140, y = 18498}, xresizerequest = {type = 1810929, 
            serial = 1147831, send_event = 143183840, display = 0x1197a9, window = 142690364, width = 0, 
            height = -1075607140}, xconfigurerequest = {type = 1810929, serial = 1147831, send_event = 143183840, 
            display = 0x1197a9, parent = 142690364, window = 0, x = -1075607140, y = 18498, width = 1339380, height = 0, 
            border_width = -1075607124, above = 3219360072, detail = 1276182, value_mask = 142690364}, xcirculate = {
            type = 1810929, serial = 1147831, send_event = 143183840, display = 0x1197a9, event = 142690364, window = 0, 
            place = -1075607140}, xcirculaterequest = {type = 1810929, serial = 1147831, send_event = 143183840, 
            display = 0x1197a9, parent = 142690364, window = 0, place = -1075607140}, xproperty = {type = 1810929, 
            serial = 1147831, send_event = 143183840, display = 0x1197a9, window = 142690364, atom = 0, time = 3219360156, 
            state = 18498}, xselectionclear = {type = 1810929, serial = 1147831, send_event = 143183840, display = 0x1197a9, 
            window = 142690364, selection = 0, time = 3219360156}, xselectionrequest = {type = 1810929, serial = 1147831, 
            send_event = 143183840, display = 0x1197a9, owner = 142690364, requestor = 0, selection = 3219360156, 
            target = 18498, property = 1339380, time = 0}, xselection = {type = 1810929, serial = 1147831, 
            send_event = 143183840, display = 0x1197a9, requestor = 142690364, selection = 0, target = 3219360156, 
            property = 18498, time = 1339380}, xcolormap = {type = 1810929, serial = 1147831, send_event = 143183840, 
            display = 0x1197a9, window = 142690364, colormap = 0, c_new = -1075607140, state = 18498}, xclient = {
            type = 1810929, serial = 1147831, send_event = 143183840, display = 0x1197a9, window = 142690364, 
            message_type = 0, format = -1075607140, data = {
              b = "BH\000\000\364o\024\000\000\000\000\000\254\211\343\277H\211\343\277", s = {18498, 0, 28660, 20, 0, 0, 
                -30292, -16413, -30392, -16413}, l = {18498, 1339380, 0, -1075607124, -1075607224}}}, xmapping = {
            type = 1810929, serial = 1147831, send_event = 143183840, display = 0x1197a9, window = 142690364, request = 0, 
            first_keycode = -1075607140, count = 18498}, xerror = {type = 1810929, display = 0x1183b7, resourceid = 143183840, 
            serial = 1152937, error_code = 60 '<', request_code = 72 'H', minor_code = 129 '\201'}, xkeymap = {type = 1810929, 
            serial = 1147831, send_event = 143183840, display = 0x1197a9, window = 142690364, 
            key_vector = "\000\000\000\000\234\211\343\277BH\000\000\364o\024\000\000\000\000\000\254\211\343\277H\211\343\277\026y\023"}, xgeneric = {type = 1810929, serial = 1147831, send_event = 143183840, display = 0x1197a9, extension = 142690364, 
            evtype = 0}, xcookie = {type = 1810929, serial = 1147831, send_event = 143183840, display = 0x1197a9, 
            extension = 142690364, evtype = 0, cookie = 3219360156, data = 0x4842}, pad = {1810929, 1147831, 143183840, 
            1152937, 142690364, 0, -1075607140, 18498, 1339380, 0, -1075607124, -1075607224, 1276182, 142690364, -1075607128, 
            41, 144900716, 12202944, 12197876, -1075607128, 142690364, -1075607224, 11243101, 11348486}}
        peekEvent = {type = -1, xany = {type = -1, serial = 3219359912, send_event = 142690440, display = 0x0, window = 0}, 
          xkey = {type = -1, serial = 3219359912, send_event = 142690440, display = 0x0, window = 0, root = 14079, 
            subwindow = 0, time = 17, x = 2838685, y = 1147831, x_root = 12197876, y_root = 1152937, state = 143183840, 
            keycode = 3219359944, same_screen = 11243101}, xbutton = {type = -1, serial = 3219359912, send_event = 142690440, 
            display = 0x0, window = 0, root = 14079, subwindow = 0, time = 17, x = 2838685, y = 1147831, x_root = 12197876, 
            y_root = 1152937, state = 143183840, button = 3219359944, same_screen = 11243101}, xmotion = {type = -1, 
            serial = 3219359912, send_event = 142690440, display = 0x0, window = 0, root = 14079, subwindow = 0, time = 17, 
            x = 2838685, y = 1147831, x_root = 12197876, y_root = 1152937, state = 143183840, is_hint = -56 '\310', 
            same_screen = 11243101}, xcrossing = {type = -1, serial = 3219359912, send_event = 142690440, display = 0x0, 
            window = 0, root = 14079, subwindow = 0, time = 17, x = 2838685, y = 1147831, x_root = 12197876, y_root = 1152937, 
            mode = 143183840, detail = -1075607352, same_screen = 11243101, focus = 18498, state = 1339380}, xfocus = {
            type = -1, serial = 3219359912, send_event = 142690440, display = 0x0, window = 0, mode = 14079, detail = 0}, 
          xexpose = {type = -1, serial = 3219359912, send_event = 142690440, display = 0x0, window = 0, x = 14079, y = 0, 
            width = 17, height = 2838685, count = 1147831}, xgraphicsexpose = {type = -1, serial = 3219359912, 
            send_event = 142690440, display = 0x0, drawable = 0, x = 14079, y = 0, width = 17, height = 2838685, 
            count = 1147831, major_code = 12197876, minor_code = 1152937}, xnoexpose = {type = -1, serial = 3219359912, 
            send_event = 142690440, display = 0x0, drawable = 0, major_code = 14079, minor_code = 0}, xvisibility = {
            type = -1, serial = 3219359912, send_event = 142690440, display = 0x0, window = 0, state = 14079}, 
          xcreatewindow = {type = -1, serial = 3219359912, send_event = 142690440, display = 0x0, parent = 0, window = 14079, 
            x = 0, y = 17, width = 2838685, height = 1147831, border_width = 12197876, override_redirect = 1152937}, 
          xdestroywindow = {type = -1, serial = 3219359912, send_event = 142690440, display = 0x0, event = 0, window = 14079}, 
          xunmap = {type = -1, serial = 3219359912, send_event = 142690440, display = 0x0, event = 0, window = 14079, 
            from_configure = 0}, xmap = {type = -1, serial = 3219359912, send_event = 142690440, display = 0x0, event = 0, 
            window = 14079, override_redirect = 0}, xmaprequest = {type = -1, serial = 3219359912, send_event = 142690440, 
            display = 0x0, parent = 0, window = 14079}, xreparent = {type = -1, serial = 3219359912, send_event = 142690440, 
            display = 0x0, event = 0, window = 14079, parent = 0, x = 17, y = 2838685, override_redirect = 1147831}, 
          xconfigure = {type = -1, serial = 3219359912, send_event = 142690440, display = 0x0, event = 0, window = 14079, 
            x = 0, y = 17, width = 2838685, height = 1147831, border_width = 12197876, above = 1152937, 
            override_redirect = 143183840}, xgravity = {type = -1, serial = 3219359912, send_event = 142690440, display = 0x0, 
            event = 0, window = 14079, x = 0, y = 17}, xresizerequest = {type = -1, serial = 3219359912, 
            send_event = 142690440, display = 0x0, window = 0, width = 14079, height = 0}, xconfigurerequest = {type = -1, 
            serial = 3219359912, send_event = 142690440, display = 0x0, parent = 0, window = 14079, x = 0, y = 17, 
            width = 2838685, height = 1147831, border_width = 12197876, above = 1152937, detail = 143183840, 
            value_mask = 3219359944}, xcirculate = {type = -1, serial = 3219359912, send_event = 142690440, display = 0x0, 
            event = 0, window = 14079, place = 0}, xcirculaterequest = {type = -1, serial = 3219359912, 
            send_event = 142690440, display = 0x0, parent = 0, window = 14079, place = 0}, xproperty = {type = -1, 
            serial = 3219359912, send_event = 142690440, display = 0x0, window = 0, atom = 14079, time = 0, state = 17}, 
          xselectionclear = {type = -1, serial = 3219359912, send_event = 142690440, display = 0x0, window = 0, 
            selection = 14079, time = 0}, xselectionrequest = {type = -1, serial = 3219359912, send_event = 142690440, 
            display = 0x0, owner = 0, requestor = 14079, selection = 0, target = 17, property = 2838685, time = 1147831}, 
          xselection = {type = -1, serial = 3219359912, send_event = 142690440, display = 0x0, requestor = 0, 
            selection = 14079, target = 0, property = 17, time = 2838685}, xcolormap = {type = -1, serial = 3219359912, 
            send_event = 142690440, display = 0x0, window = 0, colormap = 14079, c_new = 0, state = 17}, xclient = {type = -1, 
            serial = 3219359912, send_event = 142690440, display = 0x0, window = 0, message_type = 14079, format = 0, data = {
              b = "\021\000\000\000\235P+\000\267\203\021\000\364\037\272\000\251\227\021", s = {17, 0, 20637, 43, -31817, 17, 
                8180, 186, -26711, 17}, l = {17, 2838685, 1147831, 12197876, 1152937}}}, xmapping = {type = -1, 
            serial = 3219359912, send_event = 142690440, display = 0x0, window = 0, request = 14079, first_keycode = 0, 
            count = 17}, xerror = {type = -1, display = 0xbfe388a8, resourceid = 142690440, serial = 0, error_code = 0 '\000', 
            request_code = 0 '\000', minor_code = 0 '\000'}, xkeymap = {type = -1, serial = 3219359912, 
            send_event = 142690440, display = 0x0, window = 0, 
            key_vector = "\377\066\000\000\000\000\000\000\021\000\000\000\235P+\000\267\203\021\000\364\037\272\000\251\227\021\000\340\317\210\b"}, xgeneric = {type = -1, serial = 3219359912, send_event = 142690440, display = 0x0, extension = 0, 
            evtype = 14079}, xcookie = {type = -1, serial = 3219359912, send_event = 142690440, display = 0x0, extension = 0, 
            evtype = 14079, cookie = 0, data = 0x11}, pad = {-1, -1075607384, 142690440, 0, 0, 14079, 0, 17, 2838685, 1147831, 
            12197876, 1152937, 143183840, -1075607352, 11243101, 18498, 1339380, 142690352, 0, -1075607288, 1275745, 
            142690364, 152968756, 11229078}}
#9  0x080b39a6 in CompEventSource::callback (this=0x88403d8) at /build/buildd/compiz-0.9.2.1+glibmainloop2/src/screen.cpp:153
No locals.
#10 0x080d3d66 in sigc::bound_mem_functor0<bool, CompEventSource>::operator() (this=0x88446d4)
    at /usr/include/sigc++-2.0/sigc++/functors/mem_fun.h:1787
No locals.
#11 0x080d2e0a in sigc::adaptor_functor<sigc::bound_mem_functor0<bool, CompEventSource> >::operator() (this=0x88446d0)
    at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
No locals.
#12 0x080d0b7a in sigc::internal::slot_call0<sigc::bound_mem_functor0<bool, CompEventSource>, bool>::call_it (rep=0x88446b8)
    at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
        typed_rep = 0x88446b8
#13 0x080c5126 in sigc::slot0<bool>::operator() (this=0x88403f8) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:440
No locals.
#14 0x080b3a2d in CompEventSource::dispatch (this=0x88403d8, slot=0x88403f8)
    at /build/buildd/compiz-0.9.2.1+glibmainloop2/src/screen.cpp:176
No locals.
#15 0x003cdeb9 in Glib::Source::dispatch_vfunc(_GSource*, int (*)(void*), void*) () from /usr/lib/libglibmm-2.4.so.1
No symbol table info available.
#16 0x0051d4e8 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
No symbol table info available.
#17 0x0051dcb0 in g_main_context_iterate.clone.5 () from /lib/libglib-2.0.so.0
No symbol table info available.
#18 0x0051e373 in g_main_loop_run () from /lib/libglib-2.0.so.0
No symbol table info available.
#19 0x003cf3f5 in Glib::MainLoop::run() () from /usr/lib/libglibmm-2.4.so.1
No symbol table info available.
#20 0x080b3b3f in CompScreen::eventLoop (this=0x880d4a8) at /build/buildd/compiz-0.9.2.1+glibmainloop2/src/screen.cpp:191
No locals.
#21 0x080b0e2f in main (argc=1, argv=0xbfe38d04) at /build/buildd/compiz-0.9.2.1+glibmainloop2/src/main.cpp:272
        displayName = 0x0
        i = 1
        clientId = 0x0
        plugins = {<std::_Vector_base<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >> = {
            _M_impl = {<std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >> = {<__gnu_cxx::new_allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >> = {<No data fields>}, <No data fields>}, _M_start = 0x880d448, _M_finish = 0x880d44c, _M_end_of_storage = 0x880d44c}}, <No data fields>}
        disableSm = false