Application: kcmshell5 (5.16.5)
 (Compiled from sources)
Qt Version: 5.13.1
Frameworks Version: 5.62.0
Operating System: Linux 5.3.1-arch1-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
- What I was doing when the application crashed: Trying to rename virtual desktops, but every time I tried, the first one's name would change and if I tried to apply any change at all the crash occured. Every time.

- Unusual behavior I noticed: I am also unable to get window thumbnails for alt +tab. I suspect it might be related.

- Custom settings of the application: Nothing unusual.

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings Module (kcmshell5), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7efbf8e16840 (LWP 14575))]

Thread 26 (Thread 0x7efb87269700 (LWP 14606)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 25 (Thread 0x7efb87fff700 (LWP 14604)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 24 (Thread 0x7efba5ffb700 (LWP 14603)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 23 (Thread 0x7efba67fc700 (LWP 14600)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 22 (Thread 0x7efba6ffd700 (LWP 14599)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 21 (Thread 0x7efba77fe700 (LWP 14598)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 20 (Thread 0x7efba7fff700 (LWP 14597)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 19 (Thread 0x7efbd0ff9700 (LWP 14596)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 18 (Thread 0x7efbd17fa700 (LWP 14595)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 17 (Thread 0x7efbd1ffb700 (LWP 14594)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 16 (Thread 0x7efbd27fc700 (LWP 14593)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 15 (Thread 0x7efbd2ffd700 (LWP 14592)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 14 (Thread 0x7efbd37fe700 (LWP 14591)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 13 (Thread 0x7efbd3fff700 (LWP 14590)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 12 (Thread 0x7efbd8ff9700 (LWP 14589)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 11 (Thread 0x7efbd97fa700 (LWP 14588)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 10 (Thread 0x7efbd9ffb700 (LWP 14587)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7efbda7fc700 (LWP 14586)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7efbdaffd700 (LWP 14585)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7efbdb7fe700 (LWP 14584)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7efbdbfff700 (LWP 14583)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7efbe0f99700 (LWP 14582)):
#0  0x00007efbfcf2a415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007efbe61359ec in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007efbe61355e8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7efbf5153700 (LWP 14581)):
#0  0x00007efbff591667 in poll () at /usr/lib/libc.so.6
#1  0x00007efbfbeaf130 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007efbfbeaf201 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007efbfe0d5a1c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007efbfe07c4ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007efbfdeae385 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007efbfd455849 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007efbfdeaf5b0 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7efbf6aab700 (LWP 14580)):
#0  0x00007efbff58d18c in read () at /usr/lib/libc.so.6
#1  0x00007efbfbe5f9f0 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007efbfbead9f1 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007efbfbeaf0d8 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007efbfbeaf201 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007efbfe0d5a1c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007efbfe07c4ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007efbfdeae385 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007efbff031b37 in  () at /usr/lib/libQt5DBus.so.5
#9  0x00007efbfdeaf5b0 in  () at /usr/lib/libQt5Core.so.5
#10 0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7efbf802d700 (LWP 14579)):
#0  0x00007efbff591667 in poll () at /usr/lib/libc.so.6
#1  0x00007efbfcc14630 in  () at /usr/lib/libxcb.so.1
#2  0x00007efbfcc162db in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007efbf89b2101 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007efbfdeaf5b0 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007efbfcf2457f in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007efbff59c0e3 in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7efbf8e16840 (LWP 14575)):
[KCrash Handler]
#6  0x00007efbf8afb4d0 in  () at /usr/lib/qt/plugins/kcms/kcm_kwin_virtualdesktops.so
#7  0x00007efbf8af8c49 in  () at /usr/lib/qt/plugins/kcms/kcm_kwin_virtualdesktops.so
#8  0x00007efbff4691b2 in  () at /usr/lib/libKF5KCMUtils.so.5
#9  0x00007efbff46fc58 in KCModuleProxy::save() () at /usr/lib/libKF5KCMUtils.so.5
#10 0x00007efbff46b85a in  () at /usr/lib/libKF5KCMUtils.so.5
#11 0x00007efbfe0a9b70 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#12 0x00007efbfeb30d53 in QAbstractButton::clicked(bool) () at /usr/lib/libQt5Widgets.so.5
#13 0x00007efbfeb30f7c in  () at /usr/lib/libQt5Widgets.so.5
#14 0x00007efbfeb32382 in  () at /usr/lib/libQt5Widgets.so.5
#15 0x00007efbfeb32546 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () at /usr/lib/libQt5Widgets.so.5
#16 0x00007efbfea7b0e6 in QWidget::event(QEvent*) () at /usr/lib/libQt5Widgets.so.5
#17 0x00007efbfea374f5 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#18 0x00007efbfea40f8a in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#19 0x00007efbfe07d9c2 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#20 0x00007efbfea4013b in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool, bool) () at /usr/lib/libQt5Widgets.so.5
#21 0x00007efbfea97391 in  () at /usr/lib/libQt5Widgets.so.5
#22 0x00007efbfea9a2d4 in  () at /usr/lib/libQt5Widgets.so.5
#23 0x00007efbfea374f5 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#24 0x00007efbfea40e11 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#25 0x00007efbfe07d9c2 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#26 0x00007efbfe419bf4 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () at /usr/lib/libQt5Gui.so.5
#27 0x00007efbfe41b49b in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/libQt5Gui.so.5
#28 0x00007efbfe3f5afc in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Gui.so.5
#29 0x00007efbf89b312c in  () at /usr/lib/libQt5XcbQpa.so.5
#30 0x00007efbfbead3ae in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#31 0x00007efbfbeaf1c1 in  () at /usr/lib/libglib-2.0.so.0
#32 0x00007efbfbeaf201 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#33 0x00007efbfe0d5a03 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#34 0x00007efbfe07c4ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#35 0x00007efbfe084326 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#36 0x00007efbff66c5f3 in kdemain () at /usr/lib/libkdeinit5_kcmshell5.so
#37 0x00007efbff4c6ee3 in __libc_start_main () at /usr/lib/libc.so.6
#38 0x000056555555405e in _start ()
[Inferior 1 (process 14575) detached]

Reported using DrKonqi