Application: systemsettings5 (5.12.2)

Qt Version: 5.10.1
Frameworks Version: 5.43.0
Operating System: Linux 4.15.3-2-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
- What I was doing when the application crashed:
I was opening the "window decoration" section, and KCM suddenly crashes. I observed the "boarder size" is already displayed, but the center parts (themes) are not.

(Not sure if relevant:)
I changed GTK fonts first, and then switched to "widget style" ("Fine Tuning" section). Then I switched to "Window Decorations" and the crash happens immediately.

The crash does not seem to be reproducible.

-- Backtrace:
Application: 系统设置 (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f31fd9ba800 (LWP 18685))]

Thread 9 (Thread 0x7f31a9cc3700 (LWP 19041)):
#0  0x00007f31f2ec1784 in g_thread_self () at /usr/lib/libglib-2.0.so.0
#1  0x00007f31f2e97e4d in g_main_context_acquire () at /usr/lib/libglib-2.0.so.0
#2  0x00007f31f2e98ea7 in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007f31f2e9910e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007f31f9cc3314 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f31f9c653db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f31f9a747ae in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007f31f759a379 in  () at /usr/lib/libQt5Qml.so.5
#8  0x00007f31f9a79b4d in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f31f54eb08c in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f31f9381e7f in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7f31abc9b700 (LWP 19039)):
#0  0x00007f31f937797b in poll () at /usr/lib/libc.so.6
#1  0x00007f31f2e98ff3 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f31f2e9910e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f31f9cc3314 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f31f9c653db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f31f9a747ae in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f31f759a379 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f31f9a79b4d in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f31f54eb08c in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f31f9381e7f in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7f31c3645700 (LWP 19031)):
#0  0x00007f31f937797b in poll () at /usr/lib/libc.so.6
#1  0x00007f31f2e98ff3 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f31f2e9910e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f31adde8b0e in  () at /usr/lib/gio/modules/libdconfsettings.so
#4  0x00007f31f2ec126a in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007f31f54eb08c in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f31f9381e7f in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7f31c3e46700 (LWP 18695)):
#0  0x00007f31f937797b in poll () at /usr/lib/libc.so.6
#1  0x00007f31f2e98ff3 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f31f2e993b2 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#3  0x00007f31c53806d8 in  () at /usr/lib/libgio-2.0.so.0
#4  0x00007f31f2ec126a in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007f31f54eb08c in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f31f9381e7f in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f31c4647700 (LWP 18694)):
#0  0x00007f31f2edfb79 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0
#1  0x00007f31f2e98386 in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#2  0x00007f31f2e98f1e in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007f31f2e9910e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007f31f2e99162 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007f31f2ec126a in  () at /usr/lib/libglib-2.0.so.0
#6  0x00007f31f54eb08c in start_thread () at /usr/lib/libpthread.so.0
#7  0x00007f31f9381e7f in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f31cd486700 (LWP 18692)):
#0  0x00007f31f2edfb79 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0
#1  0x00007f31f2e990f9 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#2  0x00007f31f9cc3314 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f31f9c653db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f31f9a747ae in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f31f759a379 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007f31f9a79b4d in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f31f54eb08c in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f31f9381e7f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f31d5343700 (LWP 18690)):
#0  0x00007f31f937797b in poll () at /usr/lib/libc.so.6
#1  0x00007f31f2e98ff3 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f31f2e9910e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f31f9cc3314 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f31f9c653db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f31f9a747ae in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f31f759a379 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f31f9a79b4d in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f31f54eb08c in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f31f9381e7f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f31e0cfd700 (LWP 18688)):
#0  0x00007f31f937797b in poll () at /usr/lib/libc.so.6
#1  0x00007f31f2e98ff3 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f31f2e9910e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f31f9cc3314 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f31f9c653db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f31f9a747ae in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f31fb5ed416 in  () at /usr/lib/libQt5DBus.so.5
#7  0x00007f31f9a79b4d in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f31f54eb08c in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f31f9381e7f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f31fd9ba800 (LWP 18685)):
[KCrash Handler]
#5  0x00007f31f9aeea24 in QtSharedPointer::ExternalRefCountData::getAndRef(QObject const*) () at /usr/lib/libQt5Core.so.5
#6  0x00007f31f75715e8 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f31f7586892 in QV4::QmlListWrapper::toVariant() const () at /usr/lib/libQt5Qml.so.5
#8  0x00007f31f74227a8 in  () at /usr/lib/libQt5Qml.so.5
#9  0x00007f31f7422844 in QV4::ExecutionEngine::toVariant(QV4::Value const&, int, bool) () at /usr/lib/libQt5Qml.so.5
#10 0x00007f31f7580d8f in QQmlBinding::slowWrite(QQmlPropertyData const&, QQmlPropertyData const&, QV4::Value const&, bool, QFlags<QQmlPropertyData::WriteFlag>) () at /usr/lib/libQt5Qml.so.5
#11 0x00007f31f7582ed5 in  () at /usr/lib/libQt5Qml.so.5
#12 0x00007f31f75835ee in  () at /usr/lib/libQt5Qml.so.5
#13 0x00007f31f7580013 in QQmlBinding::update(QFlags<QQmlPropertyData::WriteFlag>) () at /usr/lib/libQt5Qml.so.5
#14 0x00007f31f758d0dc in QQmlObjectCreator::finalize(QQmlInstantiationInterrupt&) () at /usr/lib/libQt5Qml.so.5
#15 0x00007f31f750219f in QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) () at /usr/lib/libQt5Qml.so.5
#16 0x00007f31f75022c0 in QQmlComponentPrivate::completeCreate() () at /usr/lib/libQt5Qml.so.5
#17 0x00007f31f7502094 in QQmlComponent::create(QQmlContext*) () at /usr/lib/libQt5Qml.so.5
#18 0x00007f31aa35bfd3 in  () at /usr/lib/qt/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#19 0x00007f31aa83fad2 in  () at /usr/lib/qt/qml/org/kde/kwin/private/kdecoration/libkdecorationprivatedeclarative.so
#20 0x00007f31f758d1ee in QQmlObjectCreator::finalize(QQmlInstantiationInterrupt&) () at /usr/lib/libQt5Qml.so.5
#21 0x00007f31f75072e3 in  () at /usr/lib/libQt5Qml.so.5
#22 0x00007f31f75078cc in QQmlEnginePrivate::incubate(QQmlIncubator&, QQmlContextData*) () at /usr/lib/libQt5Qml.so.5
#23 0x00007f31f75c1caf in  () at /usr/lib/libQt5Qml.so.5
#24 0x00007f31f75c1dd2 in QQmlDelegateModel::object(int, QQmlIncubator::IncubationMode) () at /usr/lib/libQt5Qml.so.5
#25 0x00007f31f7b9c15d in  () at /usr/lib/libQt5Quick.so.5
#26 0x00007f31f7b8ec38 in  () at /usr/lib/libQt5Quick.so.5
#27 0x00007f31f7b9ad96 in  () at /usr/lib/libQt5Quick.so.5
#28 0x00007f31f7b9c7d3 in  () at /usr/lib/libQt5Quick.so.5
#29 0x00007f31f7ac32d3 in QQuickWindowPrivate::polishItems() () at /usr/lib/libQt5Quick.so.5
#30 0x00007f31f7a4e96a in  () at /usr/lib/libQt5Quick.so.5
#31 0x00007f31f7a4fa3a in  () at /usr/lib/libQt5Quick.so.5
#32 0x00007f31fa481865 in QWindow::event(QEvent*) () at /usr/lib/libQt5Gui.so.5
#33 0x00007f31f7accea6 in QQuickWindow::event(QEvent*) () at /usr/lib/libQt5Quick.so.5
#34 0x00007f31fac7ffec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#35 0x00007f31fac879c6 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#36 0x00007f31f9c66da0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#37 0x00007f31fa476383 in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () at /usr/lib/libQt5Gui.so.5
#38 0x00007f31fa47700e in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/libQt5Gui.so.5
#39 0x00007f31fa44e29c in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Gui.so.5
#40 0x00007f31eccbf48d in  () at /usr/lib/libQt5XcbQpa.so.5
#41 0x00007f31f9c653db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#42 0x00007f31f9c6e7d8 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#43 0x0000556db54aad30 in  ()
#44 0x00007f31f92acf4a in __libc_start_main () at /usr/lib/libc.so.6
#45 0x0000556db54aadba in _start ()

Reported using DrKonqi