.
Thread 3 (LWP 2944):
#0  0x00007f92c16a4b5d in poll () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x00007f92be65c39c in g_main_context_iterate.isra () from /tmp/apport_sandbox_xTMfPP/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f92be65c4ac in g_main_context_iteration () from /tmp/apport_sandbox_xTMfPP/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f92c1fde7cf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#4  0x00007f92c1f85b4a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#5  0x00007f92c1da2834 in QThread::exec() () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#6  0x00007f92c123b3c5 in QQmlThreadPrivate::run() () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
No symbol table info available.
#7  0x00007f92c1da77be in QThreadPrivate::start(void*) () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#8  0x00007f92bf644754 in ?? () from /tmp/apport_sandbox_xTMfPP/usr/lib/nvidia-304/libGL.so.1
No symbol table info available.
#9  0x00007f92c01b970a in start_thread (arg=0x7f92a8a61700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7f92a8a61700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140267871409920, -2432396269832437848, 0, 140736890686335, 140267871410624, 15677648, 2385558936979177384, 2385751451050508200}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#10 0x00007f92c16b082d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.
.
Thread 2 (LWP 2943):
#0  0x00007f92c16a4b5d in poll () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x00007f92b5e63c62 in _xcb_conn_wait () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libxcb.so.1
No symbol table info available.
#2  0x00007f92b5e658d7 in xcb_wait_for_event () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libxcb.so.1
No symbol table info available.
#3  0x00007f92b41cb629 in QXcbEventReader::run() () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
No symbol table info available.
#4  0x00007f92c1da77be in QThreadPrivate::start(void*) () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#5  0x00007f92bf644754 in ?? () from /tmp/apport_sandbox_xTMfPP/usr/lib/nvidia-304/libGL.so.1
No symbol table info available.
#6  0x00007f92c01b970a in start_thread (arg=0x7f92b1809700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7f92b1809700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140268019947264, -2432396269832437848, 0, 140736890685535, 140268019947968, 15224336, 2385508655797043112, 2385751451050508200}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#7  0x00007f92c16b082d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.
.
Thread 1 (LWP 2942):
#0  0x00007f92c15df428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
        resultvar = 0
        pid = 2942
        selftid = 2942
#1  0x00007f92c15e102a in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x0, sa_sigaction = 0x0}, sa_mask = {__val = {140268286343199, 140736890685824, 140268298643336, 140736890686256, 3, 140268294213136, 140736890686384, 140268297106400, 140268315412720, 4294967295, 140268315415056, 140736890685968, 69, 140268315412736, 17192841382047422976, 0}}, sa_flags = -597669072, sa_restorer = 0x7fffdc604b30}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007f92c1d94f81 in QMessageLogger::fatal(char const*, ...) const () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#3  0x00007f92c2d0faf1 in QSGRenderLoop::handleContextCreationFailure(QQuickWindow*, bool) () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
No symbol table info available.
#4  0x00007f92c2d18332 in QSGThreadedRenderLoop::handleExposure(QQuickWindow*) () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
No symbol table info available.
#5  0x00007f92c2d18733 in QSGThreadedRenderLoop::exposureChanged(QQuickWindow*) () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
No symbol table info available.
#6  0x00007f92c22d52b5 in QWindow::event(QEvent*) () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
No symbol table info available.
#7  0x00007f92c2d4b871 in QQuickWindow::event(QEvent*) () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
No symbol table info available.
#8  0x00007f92c1f88259 in QCoreApplication::notify(QObject*, QEvent*) () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#9  0x00007f92c1f8838b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#10 0x00007f92c22cd4ac in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
No symbol table info available.
#11 0x00007f92c22ce21d in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
No symbol table info available.
#12 0x00007f92c22b1f08 in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
No symbol table info available.
#13 0x00007f92b41fd060 in userEventSourceDispatch(_GSource*, int (*)(void*), void*) () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
No symbol table info available.
#14 0x00007f92be65c1a7 in g_main_context_dispatch () from /tmp/apport_sandbox_xTMfPP/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#15 0x00007f92be65c400 in g_main_context_iterate.isra () from /tmp/apport_sandbox_xTMfPP/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#16 0x00007f92be65c4ac in g_main_context_iteration () from /tmp/apport_sandbox_xTMfPP/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#17 0x00007f92c1fde7cf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#18 0x00007f92c1f85b4a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#19 0x00007f92c1f8dbec in QCoreApplication::exec() () from /tmp/apport_sandbox_xTMfPP/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#20 0x0000000000405231 in main ()
No symbol table info available.