#0  0x00007f302d26c418 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
        resultvar = 0
        pid = 3621
        selftid = 3621
#1  0x00007f302d26e01a in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x0, sa_sigaction = 0x0}, sa_mask = {__val = {139844893465145, 0, 139844892949295, 139844896404800, 1, 0, 140731775656784, 139844907276128, 139844907276128, 1, 139844907278480, 39993968, 66, 139844907276160, 139844905306796, 39744280}}, sa_flags = 764029056, sa_restorer = 0x25e7318}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007f302d8a584d in __gnu_cxx::__verbose_terminate_handler() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
No symbol table info available.
#3  0x00007f302d8a36b6 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
No symbol table info available.
#4  0x00007f302d8a3701 in std::terminate() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
No symbol table info available.
#5  0x00007f302d8a3919 in __cxa_throw () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
No symbol table info available.
#6  0x00007f300c14f11c in void boost::throw_exception<boost::bad_function_call>(boost::bad_function_call const&) () from /usr/lib/x86_64-linux-gnu/compiz/libunityshell.so
No symbol table info available.
#7  0x00007f300c2906d4 in unity::lockscreen::AcceleratorController::OnActionActivated(CompAction&) () from /usr/lib/x86_64-linux-gnu/compiz/libunityshell.so
No symbol table info available.
#8  0x00007f300c291412 in unity::lockscreen::Accelerator::KeyPressActivate() () from /usr/lib/x86_64-linux-gnu/compiz/libunityshell.so
No symbol table info available.
#9  0x00007f300c29185d in unity::lockscreen::Accelerator::HandleKeyPress(unsigned int, unsigned int, unity::lockscreen::PressedState) () from /usr/lib/x86_64-linux-gnu/compiz/libunityshell.so
No symbol table info available.
#10 0x00007f300c2922f6 in unity::lockscreen::Accelerators::HandleKeyPress(unsigned int, unsigned int) () from /usr/lib/x86_64-linux-gnu/compiz/libunityshell.so
No symbol table info available.
#11 0x00007f300c2a271d in unity::lockscreen::Shield::FindKeyFocusArea(unsigned int, unsigned long, unsigned long) () from /usr/lib/x86_64-linux-gnu/compiz/libunityshell.so
No symbol table info available.
#12 0x00007f300ae00f8e in nux::WindowCompositor::FindKeyFocusAreaFrom(nux::EventType, unsigned int, unsigned int, nux::InputArea*, nux::ObjectWeakPtr<nux::InputArea>&, nux::ObjectWeakPtr<nux::BaseWindow>&) () from /usr/lib/x86_64-linux-gnu/libnux-4.0.so.0
No symbol table info available.
#13 0x00007f300ae0a0ad in nux::WindowCompositor::KeyboardEventCycle(nux::Event&) () from /usr/lib/x86_64-linux-gnu/libnux-4.0.so.0
No symbol table info available.
#14 0x00007f300ae0a63d in nux::WindowCompositor::ProcessEvent(nux::Event&) () from /usr/lib/x86_64-linux-gnu/libnux-4.0.so.0
No symbol table info available.
#15 0x00007f300ae0ef09 in nux::WindowThread::DoProcessEvent(nux::Event&) () from /usr/lib/x86_64-linux-gnu/libnux-4.0.so.0
No symbol table info available.
#16 0x00007f300ade08a6 in nux::nux_event_dispatch(_GSource*, int (*)(void*), void*) () from /usr/lib/x86_64-linux-gnu/libnux-4.0.so.0
No symbol table info available.
#17 0x00007f302bb6105a in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#18 0x00007f302bb61400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#19 0x00007f302bb61722 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#20 0x00007f302dbea91f in compiz::private_screen::EventManager::startEventLoop(_XDisplay*) () from /usr/lib/x86_64-linux-gnu/libcompiz_core.so.ABI-20151010
No symbol table info available.
#21 0x00000000004017c1 in main ()
No symbol table info available.