Application: systemsettings5 (5.21.5)

Qt Version: 5.15.2
Frameworks Version: 5.81.0
Operating System: Linux 5.11.18-300.fc34.x86_64 x86_64
Windowing System: Wayland
Drkonqi Version: 5.21.5
Distribution: "Fedora release 34 (Thirty Four)"

-- Information about the crash:
- What I was doing when the application crashed:
changing system settings like global theme with external monitor connected 
also crashed when enabling/disabling both external montior display and laptop display.

- Unusual behavior I noticed:
it get frozen automatically.

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault

[KCrash Handler]
#4  0x00007f62f5344ed4 in QWaylandClientExtensionPrivate::handleRegistryGlobal(void*, wl_registry*, unsigned int, QString const&, unsigned int) () at /lib64/libQt5WaylandClient.so.5
#5  0x00007f62f53313e9 in QtWaylandClient::QWaylandDisplay::registry_global(unsigned int, QString const&, unsigned int) () at /lib64/libQt5WaylandClient.so.5
#6  0x00007f62f534d783 in QtWayland::wl_registry::handle_global(void*, wl_registry*, unsigned int, char const*, unsigned int) () at /lib64/libQt5WaylandClient.so.5
#7  0x00007f62f2d0fc04 in ffi_call_unix64 () at /lib64/libffi.so.6
#8  0x00007f62f2d0f107 in ffi_call () at /lib64/libffi.so.6
#9  0x00007f62f529ed10 in wl_closure_invoke.constprop () at /lib64/libwayland-client.so.0
#10 0x00007f62f529f42b in dispatch_event.isra () at /lib64/libwayland-client.so.0
#11 0x00007f62f529f61c in wl_display_dispatch_queue_pending () at /lib64/libwayland-client.so.0
#12 0x00007f62f53297b3 in QtWaylandClient::QWaylandDisplay::flushRequests() () at /lib64/libQt5WaylandClient.so.5
#13 0x00007f62f76b64fd in void doActivate<false>(QObject*, int, void**) () at /lib64/libQt5Core.so.5
#14 0x00007f62f76b8b3a in QSocketNotifier::activated(QSocketDescriptor, QSocketNotifier::Type, QSocketNotifier::QPrivateSignal) () at /lib64/libQt5Core.so.5
#15 0x00007f62f76b92d4 in QSocketNotifier::event(QEvent*) () at /lib64/libQt5Core.so.5
#16 0x00007f62f8210e73 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#17 0x00007f62f7685f48 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#18 0x00007f62f76d317f in socketNotifierSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5Core.so.5
#19 0x00007f62f54454cf in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#20 0x00007f62f54994e8 in g_main_context_iterate.constprop () at /lib64/libglib-2.0.so.0
#21 0x00007f62f5442c03 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#22 0x00007f62f76d26f8 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#23 0x00007f62f76849b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#24 0x00007f62f768c544 in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#25 0x0000564f666e0d4c in main ()
[Inferior 1 (process 5462) detached]

Reported using DrKonqi