#0  0x00007f8ee26083a5 in __GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        resultvar = 0
        pid = <optimized out>
        selftid = <optimized out>
#1  0x00007f8ee260bb0b in __GI_abort () at abort.c:92
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x1a2, sa_sigaction = 0x1a2}, sa_mask = {__val = {140251661267329, 140251425919520, 140251661259226, 140735222290096, 140251660262770, 418, 206158430232, 140735222290112, 140735222289888, 4, 206158430256, 30244432, 140251663614400, 30244572, 0, 140735222298931}}, sa_flags = -495791654, sa_restorer = 0x7f8ed46b6a40}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007f8ee2600d4d in __GI___assert_fail (assertion=0x7f8ed46b690e "px != 0", file=<optimized out>, line=418, function=<optimized out>) at assert.c:81
        buf = 0x1cd7e50 "compiz: /usr/include/boost/smart_ptr/shared_ptr.hpp:418: T* boost::shared_ptr<T>::operator->() const [with T = UnityFBO]: Assertion `px != 0' failed.\n"
#3  0x00007f8ed46a9a3e in operator-> (this=<optimized out>) at /usr/include/boost/smart_ptr/shared_ptr.hpp:418
No locals.
#4  operator-> (this=<optimized out>) at /build/buildd/unity-4.10.2/plugins/unityshell/src/unityshell.cpp:2142
No locals.
#5  glPaintOutput (this=<optimized out>, attrib=<optimized out>, transform=<optimized out>, region=<optimized out>, output=<optimized out>, mask=<optimized out>) at /build/buildd/unity-4.10.2/plugins/unityshell/src/unityshell.cpp:671
No locals.
#6  UnityScreen::glPaintOutput (this=0x15be500, attrib=..., transform=..., region=..., output=0x103d300, mask=3) at /build/buildd/unity-4.10.2/plugins/unityshell/src/unityshell.cpp:662
No locals.
#7  0x00007f8eda0fdcfc in GLScreen::glPaintOutput (this=0x116aff0, sAttrib=..., transform=<optimized out>, region=..., output=0x103d300, mask=<optimized out>) at /build/buildd/compiz-0.9.5.92+bzr2791/plugins/opengl/src/paint.cpp:463
        rv = <optimized out>
        curr = 0
        sTransform = {m = {8.96362871e-38, 0, -1.39048638e+21, 4.57580001e-41, 2.42122851e-38, 0, 3.87146435e+34, 4.59163468e-41, 1.43492963e-42, 0, 8.40779079e-43, 0, 5.60519386e-45, 0, -1.05574255e+21, 4.57580001e-41}}
#8  0x00007f8eda0f2cdc in PrivateGLScreen::paintOutputs (this=0x116b050, outputs=..., mask=4, region=<optimized out>) at /build/buildd/compiz-0.9.5.92+bzr2791/plugins/opengl/src/screen.cpp:1060
        identity = {m = {1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1}}
        output = 0x103d300
        _foreach_continue1034 = false
        r = {x = 0, y = <optimized out>, width = 1024, height = 600}
        tmpRegion = {priv = 0x116ffa0}
#9  0x00007f8eda318c79 in CompositeScreen::paint (this=0x1160ee0, outputs=<optimized out>, mask=<optimized out>) at /build/buildd/compiz-0.9.5.92+bzr2791/plugins/composite/src/screen.cpp:915
        curr = 0
#10 0x00007f8eda31a23f in CompositeScreen::handlePaintTimeout (this=0x1160ee0) at /build/buildd/compiz-0.9.5.92+bzr2791/plugins/composite/src/screen.cpp:855
        timeDiff = <optimized out>
        mask = 4
        outputs = {<std::_List_base<CompOutput*, std::allocator<CompOutput*> >> = {_M_impl = {<std::allocator<std::_List_node<CompOutput*> >> = {<__gnu_cxx::new_allocator<std::_List_node<CompOutput*> >> = {<No data fields>}, <No data fields>}, _M_node = {_M_next = 0x1972950, _M_prev = 0x1b1cf70}}}, <No data fields>}
        tv = {tv_sec = 1314799735, tv_usec = 873124}
        timeToNextRedraw = <optimized out>
#11 0x000000000042208b in operator() (this=<optimized out>) at /usr/include/boost/function/function_template.hpp:1013
No locals.
#12 CompTimer::triggerCallback (this=<optimized out>) at /build/buildd/compiz-0.9.5.92+bzr2791/src/timer.cpp:234
No locals.
#13 0x00000000004221c2 in CompTimeoutSource::callback (this=<optimized out>) at /build/buildd/compiz-0.9.5.92+bzr2791/src/timer.cpp:162
        t = 0x1162850
#14 0x00000000004216bd in operator() (this=<optimized out>) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:440
No locals.
#15 dispatch (slot=<optimized out>, this=<optimized out>) at /build/buildd/compiz-0.9.5.92+bzr2791/src/timer.cpp:148
No locals.
#16 CompTimeoutSource::dispatch (this=<optimized out>, slot=<optimized out>) at /build/buildd/compiz-0.9.5.92+bzr2791/src/timer.cpp:146
No locals.
#17 0x00007f8ee3c7b81f in Glib::Source::dispatch_vfunc (callback=<optimized out>, user_data=<optimized out>) at main.cc:892
        self = <optimized out>
        callback_data = <optimized out>
        __PRETTY_FUNCTION__ = "static gboolean Glib::Source::dispatch_vfunc(GSource*, GSourceFunc, void*)"
#18 0x00007f8ee3780efd in g_main_dispatch (context=0xf95770) at /build/buildd/glib2.0-2.29.16/./glib/gmain.c:2439
        dispatch = 0x7f8ee3c7b7d0 <Glib::Source::dispatch_vfunc(_GSource*, int (*)(void*), void*)>
        was_in_call = 0
        user_data = 0x103b630
        callback = 0x7f8ee3c7b8c0 <(anonymous namespace)::glibmm_dummy_source_callback(void*)>
        cb_funcs = 0x7f8ee3a31670
        cb_data = 0x1156890
        current_source_link = {data = 0x1156d20, next = 0x0}
        need_destroy = <optimized out>
        source = 0x1156d20
        current = 0x107a570
        i = <optimized out>
#19 g_main_context_dispatch (context=0xf95770) at /build/buildd/glib2.0-2.29.16/./glib/gmain.c:3008
No locals.
#20 0x00007f8ee37816f8 in g_main_context_iterate (context=0xf95770, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.29.16/./glib/gmain.c:3086
        max_priority = 2147483647
        timeout = 1
        some_ready = 1
        nfds = 8
        allocated_nfds = <optimized out>
        fds = <optimized out>
#21 0x00007f8ee3781c32 in g_main_loop_run (loop=0x1156930) at /build/buildd/glib2.0-2.29.16/./glib/gmain.c:3294
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#22 0x000000000042b546 in CompScreen::eventLoop (this=0x1029e30) at /build/buildd/compiz-0.9.5.92+bzr2791/src/screen.cpp:128
No locals.
#23 0x000000000041f57a in main (argc=2, argv=0x7fff78ee9d48) at /build/buildd/compiz-0.9.5.92+bzr2791/src/main.cpp:295
        manager = {plugins = {<std::_List_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::_List_node<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >> = {<__gnu_cxx::new_allocator<std::_List_node<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >> = {<No data fields>}, <No data fields>}, _M_node = {_M_next = 0xf9a620, _M_prev = 0xf9a620}}}, <No data fields>}, disableSm = false, clientId = 0x0, displayName = 0x0}