Application: plasma-discover (5.20.5)

Qt Version: 5.15.2
Frameworks Version: 5.78.0
Operating System: Linux 5.10.0-23-amd64 x86_64
Windowing system: X11
Distribution: Debian GNU/Linux 11 (bullseye)

-- Information about the crash:
- What I was doing when the application crashed:
I was trying to open discover, 

- Unusual behavior I noticed:
Once this happened, it became impossible to open the system configuration apps, and all apps related to graphical configuration (add components on the desktop, modify the app launcher, use discover, and of course use the system config app)

- Custom settings of the application:
Using Chameleon style and changing it to another windows style.

The crash can be reproduced every time.

-- Backtrace:
Application: Discover (plasma-discover), signal: Segmentation fault

[KCrash Handler]
#4  0x00007fa5faa21610 in QObject::objectName() const () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fa5efa914d6 in chameleon::ChameleonStyle::drawControl(QStyle::ControlElement, QStyleOption const*, QPainter*, QWidget const*) const () from /usr/lib/x86_64-linux-gnu/qt5/plugins/styles/libchameleon.so
#6  0x00007fa5efa8b9e0 in chameleon::ChameleonStyle::drawComplexControl(QStyle::ComplexControl, QStyleOptionComplex const*, QPainter*, QWidget const*) const () from /usr/lib/x86_64-linux-gnu/qt5/plugins/styles/libchameleon.so
#7  0x00007fa5d9ec789f in ?? () from /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/qqc2desktopstyle/private/libqqc2desktopstyleplugin.so
#8  0x00007fa5d9ec887f in ?? () from /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/qqc2desktopstyle/private/libqqc2desktopstyleplugin.so
#9  0x00007fa5fc4acd95 in QQuickWindowPrivate::polishItems() () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007fa5fc451715 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007fa5fc452a72 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007fa5fadde7e5 in QWindow::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#13 0x00007fa5fb9b115f in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007fa5fa9f7fca in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007fa5fadd39bd in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#16 0x00007fa5fada864c in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#17 0x00007fa5f52207da in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#18 0x00007fa5f8edfe6b in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007fa5f8ee0118 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007fa5f8ee01cf in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007fa5faa4f51f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007fa5fa9f698b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007fa5fa9fec00 in QCoreApplication::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x000055ffcc498f34 in ?? ()
#25 0x00007fa5fa3cad0a in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
#26 0x000055ffcc4994aa in _start ()
[Inferior 1 (process 5203) detached]

Possible duplicates by query: bug 439252, bug 208726, bug 170806.

Reported using DrKonqi