Bug 439808

Application: systemsettings5 (5.22.2)

Qt Version: 5.15.2
Frameworks Version: 5.83.0
Operating System: Linux 5.12.14-300.fc34.x86_64 x86_64
Windowing System: Wayland
Drkonqi Version: 5.22.2
Distribution: Fedora 34 (KDE Plasma)

-- Information about the crash:
- What I was doing when the application crashed:

Open System Settings
Click on Workspace Behavior
Click on Desktop Effects
Scroll to Blur
Disable Blur
Enable Blur
--> System Settings crashed

I tried to search "Blur" then click on "Desktop Effects" then disable and enable it and System Settings didn't crash.
I also tried to search "General Behavior", open it then click on "Desktop Effects" then disable and enable "Blur" and System Settings didn't crash.

You need to open "General Behavior" by clicking on "Workspace Behavior" then you can go anywhere in the System Settings, then go in "Desktop Effects" (by clicking on "Workspace Behavior" or by a search) and disable/enable "Blur" to crash System Settings.

The crash can be reproduced every time.

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

[KCrash Handler]
#4  0x00007f2a5de46f34 in QWaylandClientExtensionPrivate::handleRegistryGlobal(void*, wl_registry*, unsigned int, QString const&, unsigned int) () from /lib64/libQt5WaylandClient.so.5
#5  0x00007f2a5de33419 in QtWaylandClient::QWaylandDisplay::registry_global(unsigned int, QString const&, unsigned int) () from /lib64/libQt5WaylandClient.so.5
#6  0x00007f2a5de4f7c3 in QtWayland::wl_registry::handle_global(void*, wl_registry*, unsigned int, char const*, unsigned int) () from /lib64/libQt5WaylandClient.so.5
#7  0x00007f2a5b7b1c04 in ffi_call_unix64 () from /lib64/libffi.so.6
#8  0x00007f2a5b7b1107 in ffi_call () from /lib64/libffi.so.6
#9  0x00007f2a5dda0d10 in wl_closure_invoke.constprop () from /lib64/libwayland-client.so.0
#10 0x00007f2a5dda142b in dispatch_event.isra () from /lib64/libwayland-client.so.0
#11 0x00007f2a5dda161c in wl_display_dispatch_queue_pending () from /lib64/libwayland-client.so.0
#12 0x00007f2a5de2b5df in QtWaylandClient::QWaylandDisplay::flushRequests() () from /lib64/libQt5WaylandClient.so.5
#13 0x00007f2a60440ce0 in void doActivate<false>(QObject*, int, void**) () from /lib64/libQt5Core.so.5
#14 0x00007f2a6045e72b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#15 0x00007f2a6040bab2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#16 0x00007f2a60413fe4 in QCoreApplication::exec() () from /lib64/libQt5Core.so.5
#17 0x000055ee3c02f58c in main ()
[Inferior 1 (process 5257) detached]

Reported using DrKonqi