Application: systemsettings5 (5.12.4)

Qt Version: 5.10.1
Frameworks Version: 5.45.0
Operating System: Linux 4.14.34-1-MANJARO x86_64
Distribution: "Netrunner Rolling"

-- Information about the crash:
- What I was doing when the application crashed:
I was testing and reproduced bug https://bugs.kde.org/show_bug.cgi?id=391615 - contents of previously selected menu was displayed - and i selected one of the left menus - i don't quite remember which one - and System Settings app crashed

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f8558d30800 (LWP 19991))]

Thread 4 (Thread 0x7f852bfff700 (LWP 19995)):
#0  0x00007f854e3182f4 in g_mutex_unlock () at /usr/lib/libglib-2.0.so.0
#1  0x00007f854e2d1518 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f854e2d163e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f85550ca264 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f855506c32b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f8554e7b72e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f85529ca379 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f8554e80acd in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f855093808c in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f8554788e7f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f85341d3700 (LWP 19994)):
#0  0x00007f855477e97b in poll () at /usr/lib/libc.so.6
#1  0x00007f854e2d1523 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f854e2d163e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f85550ca264 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f855506c32b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f8554e7b72e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f85529ca379 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f8554e80acd in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f855093808c in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f8554788e7f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f8543016700 (LWP 19993)):
#0  0x00007f855477a3d8 in read () at /usr/lib/libc.so.6
#1  0x00007f854e316ed1 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f854e2d0ff8 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007f854e2d14c6 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007f854e2d163e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007f85550ca264 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f855506c32b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007f8554e7b72e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007f85569e7416 in  () at /usr/lib/libQt5DBus.so.5
#9  0x00007f8554e80acd in  () at /usr/lib/libQt5Core.so.5
#10 0x00007f855093808c in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007f8554788e7f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f8558d30800 (LWP 19991)):
[KCrash Handler]
#6  0x00007f85537b51d3 in XAddExtension () at /usr/lib/libX11.so.6
#7  0x00007f851916ca05 in  () at /usr/lib/libXft.so.2
#8  0x00007f851916cede in XftDefaultHasRender () at /usr/lib/libXft.so.2
#9  0x00007f851916d410 in XftDefaultSubstitute () at /usr/lib/libXft.so.2
#10 0x00007f851916fd45 in XftFontMatch () at /usr/lib/libXft.so.2
#11 0x00007f851916fed3 in XftFontOpen () at /usr/lib/libXft.so.2
#12 0x00007f851959b68a in KFI::CFcEngine::getFont(int) () at /usr/lib/libkfontinstui.so.5
#13 0x00007f851959bb63 in KFI::CFcEngine::queryFont() () at /usr/lib/libkfontinstui.so.5
#14 0x00007f851959c329 in KFI::CFcEngine::getSizes() () at /usr/lib/libkfontinstui.so.5
#15 0x00007f851959d4d8 in KFI::CFcEngine::draw(QString const&, unsigned int, int, QColor const&, QColor const&, int, int, bool, QList<KFI::CFcEngine::TRange> const&, QList<KFI::CFcEngine::TChar>*) () at /usr/lib/libkfontinstui.so.5
#16 0x00007f85197c5c76 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#17 0x00007f85197eec37 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#18 0x00007f851980232a in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#19 0x00007f855509e616 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#20 0x00007f8519800816 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#21 0x00007f85197e25d3 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#22 0x00007f8519801c09 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#23 0x00007f855509e616 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#24 0x00007f8555017e88 in QItemSelectionModel::selectionChanged(QItemSelection const&, QItemSelection const&) () at /usr/lib/libQt5Core.so.5
#25 0x00007f855501c8a1 in QItemSelectionModel::emitSelectionChanged(QItemSelection const&, QItemSelection const&) () at /usr/lib/libQt5Core.so.5
#26 0x00007f855501fb46 in QItemSelectionModel::select(QItemSelection const&, QFlags<QItemSelectionModel::SelectionFlag>) () at /usr/lib/libQt5Core.so.5
#27 0x00007f8555019f4d in QItemSelectionModel::select(QModelIndex const&, QFlags<QItemSelectionModel::SelectionFlag>) () at /usr/lib/libQt5Core.so.5
#28 0x00007f85197dbe3d in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#29 0x00007f85197f0d6e in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#30 0x00007f851980243c in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#31 0x00007f855509e616 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#32 0x00007f85198006bf in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#33 0x00007f8519801690 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#34 0x00007f855509e616 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#35 0x00007f8519803886 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#36 0x00007f8519804606 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#37 0x00007f85569f2b5d in  () at /usr/lib/libQt5DBus.so.5
#38 0x00007f855509f062 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#39 0x00007f855607dfec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#40 0x00007f85560859c6 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#41 0x00007f855506dcf0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#42 0x00007f8555070956 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#43 0x00007f85550cac54 in  () at /usr/lib/libQt5Core.so.5
#44 0x00007f854e2d1368 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#45 0x00007f854e2d15b1 in  () at /usr/lib/libglib-2.0.so.0
#46 0x00007f854e2d163e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#47 0x00007f85550ca241 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#48 0x00007f85484314e2 in  () at /usr/lib/libQt5WaylandClient.so.5
#49 0x00007f855506c32b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#50 0x00007f8555075728 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#51 0x0000556d66b42d30 in  ()
#52 0x00007f85546b3f4a in __libc_start_main () at /usr/lib/libc.so.6
#53 0x0000556d66b42dba in _start ()

Reported using DrKonqi