Bug 388754

Application: systemsettings5 (5.11.5)

Qt Version: 5.10.0
Frameworks Version: 5.41.0
Operating System: Linux 4.14.12-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

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

Any time "Font Management" is selected on the systems settings screen the system settings app crashes

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f029878cc80 (LWP 22189))]

Thread 4 (Thread 0x7f02718cd700 (LWP 22192)):
#0  0x00007f029435191b in poll () at /usr/lib/libc.so.6
#1  0x00007f028dea3ed3 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f028dea3fae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f0294c9c6b4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f0294c3e82b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f0294a4e78e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f0292abda19 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f0294a53b2d in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f02900a508c in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f029435be1f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f0279730700 (LWP 22191)):
#0  0x00007f028dea3eb8 in  () at /usr/lib/libglib-2.0.so.0
#1  0x00007f028dea3fae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#2  0x00007f0294c9c6b4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f0294c3e82b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f0294a4e78e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f0292abda19 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007f0294a53b2d in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f02900a508c in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f029435be1f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f02830a1700 (LWP 22190)):
#0  0x00007f029435191b in poll () at /usr/lib/libc.so.6
#1  0x00007f028dea3ed3 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f028dea3fae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f0294c9c6b4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f0294c3e82b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f0294a4e78e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f02950be416 in  () at /usr/lib/libQt5DBus.so.5
#7  0x00007f0294a53b2d in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f02900a508c in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f029435be1f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f029878cc80 (LWP 22189)):
[KCrash Handler]
#5  0x00007f0297732228 in vtable for KLineEdit () at /usr/lib/libKF5Completion.so.5
#6  0x00007f0290b711d5 in XAddExtension () at /usr/lib/libX11.so.6
#7  0x00007f025302da05 in  () at /usr/lib/libXft.so.2
#8  0x00007f025302dede in XftDefaultHasRender () at /usr/lib/libXft.so.2
#9  0x00007f025302e410 in XftDefaultSubstitute () at /usr/lib/libXft.so.2
#10 0x00007f0253030d45 in XftFontMatch () at /usr/lib/libXft.so.2
#11 0x00007f0253030ed3 in XftFontOpen () at /usr/lib/libXft.so.2
#12 0x00007f02536da51a in KFI::CFcEngine::getFont(int) () at /usr/lib/libkfontinstui.so.5
#13 0x00007f02536da9e4 in KFI::CFcEngine::queryFont() () at /usr/lib/libkfontinstui.so.5
#14 0x00007f02536db199 in KFI::CFcEngine::getSizes() () at /usr/lib/libkfontinstui.so.5
#15 0x00007f02536dc889 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 0x00007f0253b813fa in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#17 0x00007f0253bb15a7 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#18 0x00007f0253bc76da in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#19 0x00007f0294c70a06 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#20 0x00007f0253bc5b56 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#21 0x00007f0253ba2f23 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#22 0x00007f0253bc6e59 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#23 0x00007f0294c70a06 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#24 0x00007f0294bea848 in QItemSelectionModel::selectionChanged(QItemSelection const&, QItemSelection const&) () at /usr/lib/libQt5Core.so.5
#25 0x00007f0294bef261 in QItemSelectionModel::emitSelectionChanged(QItemSelection const&, QItemSelection const&) () at /usr/lib/libQt5Core.so.5
#26 0x00007f0294bf2506 in QItemSelectionModel::select(QItemSelection const&, QFlags<QItemSelectionModel::SelectionFlag>) () at /usr/lib/libQt5Core.so.5
#27 0x00007f0294bec90d in QItemSelectionModel::select(QModelIndex const&, QFlags<QItemSelectionModel::SelectionFlag>) () at /usr/lib/libQt5Core.so.5
#28 0x00007f0253b9c32d in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#29 0x00007f0253bb545e in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#30 0x00007f0253bc77ec in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#31 0x00007f0294c70a06 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#32 0x00007f0253bc59ff in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#33 0x00007f0253bc68e0 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#34 0x00007f0294c70a06 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#35 0x00007f0253bc8bd8 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#36 0x00007f0253bcb076 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#37 0x00007f02950c9b5d in  () at /usr/lib/libQt5DBus.so.5
#38 0x00007f0294c71452 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#39 0x00007f029685fe3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#40 0x00007f0296867816 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#41 0x00007f0294c401e0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#42 0x00007f0294c42e46 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#43 0x00007f0294c9d0a4 in  () at /usr/lib/libQt5Core.so.5
#44 0x00007f028dea2270 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#45 0x00007f028dea3f69 in  () at /usr/lib/libglib-2.0.so.0
#46 0x00007f028dea3fae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#47 0x00007f0294c9c691 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#48 0x00007f02882ddcd2 in  () at /usr/lib/libQt5WaylandClient.so.5
#49 0x00007f0294c3e82b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#50 0x00007f0294c47b18 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#51 0x000055afae533cca in  ()
#52 0x00007f0294286f4a in __libc_start_main () at /usr/lib/libc.so.6
#53 0x000055afae533d4a in _start ()

Reported using DrKonqi