Application: systemsettings5 (5.12.5)

Qt Version: 5.11.0
Frameworks Version: 5.47.0
Operating System: Linux 4.16.13-2-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
- What I was doing when the application crashed:
I opened under systemsettings: Fonts --> Font Management. The crash happens every time.

- Custom settings of the application:
Wayland

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 0x7fd2b0145800 (LWP 9151))]

Thread 17 (Thread 0x7fd24ca93700 (LWP 9172)):
#0  0x00007fd2abb9b934 in read () at /usr/lib/libc.so.6
#1  0x00007fd2a56c2ed1 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fd2a567cff8 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007fd2a567d4c6 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007fd2a567d8e2 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#5  0x00007fd24da11348 in  () at /usr/lib/libgio-2.0.so.0
#6  0x00007fd2a56a5a2a in  () at /usr/lib/libglib-2.0.so.0
#7  0x00007fd2a7cdf075 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007fd2abbaa53f in clone () at /usr/lib/libc.so.6

Thread 16 (Thread 0x7fd24d294700 (LWP 9171)):
#0  0x00007fd2abb9b934 in read () at /usr/lib/libc.so.6
#1  0x00007fd2a56c2ed1 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fd2a567cff8 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007fd2a567d4c6 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007fd2a567d63e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007fd2a567d692 in  () at /usr/lib/libglib-2.0.so.0
#6  0x00007fd2a56a5a2a in  () at /usr/lib/libglib-2.0.so.0
#7  0x00007fd2a7cdf075 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007fd2abbaa53f in clone () at /usr/lib/libc.so.6

Thread 15 (Thread 0x7fd24ffff700 (LWP 9167)):
#0  0x00007fd2a7ce4ffc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fd292b990a4 in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007fd292b98d98 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007fd2a7cdf075 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fd2abbaa53f in clone () at /usr/lib/libc.so.6

Thread 14 (Thread 0x7fd25cc20700 (LWP 9166)):
#0  0x00007fd2a7ce4ffc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fd292b990a4 in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007fd292b98d98 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007fd2a7cdf075 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fd2abbaa53f in clone () at /usr/lib/libc.so.6

Thread 13 (Thread 0x7fd25e982700 (LWP 9165)):
#0  0x00007fd2a7ce4ffc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fd292b990a4 in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007fd292b98d98 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007fd2a7cdf075 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fd2abbaa53f in clone () at /usr/lib/libc.so.6

Thread 12 (Thread 0x7fd25f183700 (LWP 9164)):
#0  0x00007fd2a7ce4ffc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fd292b990a4 in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007fd292b98d98 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007fd2a7cdf075 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fd2abbaa53f in clone () at /usr/lib/libc.so.6

Thread 11 (Thread 0x7fd268e4d700 (LWP 9163)):
#0  0x00007fd2abb9b934 in read () at /usr/lib/libc.so.6
#1  0x00007fd2a56c2ed1 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fd2a567cff8 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007fd2a567d4c6 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007fd2a567d63e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007fd2ac4bbe64 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007fd2ac46785c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007fd2ac2b0ac9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007fd2a9d98559 in  () at /usr/lib/libQt5Qml.so.5
#9  0x00007fd2ac2bab95 in  () at /usr/lib/libQt5Core.so.5
#10 0x00007fd2a7cdf075 in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007fd2abbaa53f in clone () at /usr/lib/libc.so.6

Thread 10 (Thread 0x7fd284e41700 (LWP 9161)):
#0  0x00007fd2abb9fea9 in poll () at /usr/lib/libc.so.6
#1  0x00007fd2a567d523 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fd2a567d63e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fd2ac4bbe64 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fd2ac46785c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fd2ac2b0ac9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fd2a9d98559 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007fd2ac2bab95 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fd2a7cdf075 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fd2abbaa53f in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7fd285ffb700 (LWP 9160)):
#0  0x00007fd2a7ce4ffc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fd292b990a4 in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007fd292b98d98 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007fd2a7cdf075 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fd2abbaa53f in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7fd2867fc700 (LWP 9159)):
#0  0x00007fd2a7ce4ffc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fd292b990a4 in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007fd292b98d98 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007fd2a7cdf075 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fd2abbaa53f in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7fd286ffd700 (LWP 9158)):
#0  0x00007fd2a7ce4ffc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fd292b990a4 in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007fd292b98d98 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007fd2a7cdf075 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fd2abbaa53f in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7fd2877fe700 (LWP 9157)):
#0  0x00007fd2a7ce4ffc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fd292b990a4 in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007fd292b98d98 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007fd2a7cdf075 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fd2abbaa53f in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7fd287fff700 (LWP 9156)):
#0  0x00007fd2a7ce4ffc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fd292b990a4 in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007fd292b98d98 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007fd2a7cdf075 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fd2abbaa53f in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7fd28c841700 (LWP 9155)):
#0  0x00007fd2a7ce4ffc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fd292b990a4 in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007fd292b98d98 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007fd2a7cdf075 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fd2abbaa53f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7fd28d254700 (LWP 9154)):
#0  0x00007fd2a7ce4ffc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fd292b990a4 in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007fd292b98d98 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007fd2a7cdf075 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fd2abbaa53f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7fd29a814700 (LWP 9153)):
#0  0x00007fd2a56c42f4 in g_mutex_unlock () at /usr/lib/libglib-2.0.so.0
#1  0x00007fd2a567c3ac in g_main_context_acquire () at /usr/lib/libglib-2.0.so.0
#2  0x00007fd2a567d3d7 in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007fd2a567d63e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007fd2ac4bbe64 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fd2ac46785c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007fd2ac2b0ac9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007fd2addd8976 in  () at /usr/lib/libQt5DBus.so.5
#8  0x00007fd2ac2bab95 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007fd2a7cdf075 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007fd2abbaa53f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7fd2b0145800 (LWP 9151)):
[KCrash Handler]
#6  0x00007fd2aabbe1d3 in XAddExtension () at /usr/lib/libX11.so.6
#7  0x00007fd237df112f in  () at /usr/lib/libXft.so.2
#8  0x00007fd237df163e in XftDefaultHasRender () at /usr/lib/libXft.so.2
#9  0x00007fd237df1a79 in XftDefaultSubstitute () at /usr/lib/libXft.so.2
#10 0x00007fd237df450f in XftFontMatch () at /usr/lib/libXft.so.2
#11 0x00007fd237df46c5 in XftFontOpen () at /usr/lib/libXft.so.2
#12 0x00007fd23c30168a in KFI::CFcEngine::getFont(int) () at /usr/lib/libkfontinstui.so.5
#13 0x00007fd23c301b63 in KFI::CFcEngine::queryFont() () at /usr/lib/libkfontinstui.so.5
#14 0x00007fd23c302329 in KFI::CFcEngine::getSizes() () at /usr/lib/libkfontinstui.so.5
#15 0x00007fd23c3034d8 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 0x00007fd23c52bc76 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#17 0x00007fd23c554c37 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#18 0x00007fd23c56832a in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#19 0x00007fd2ac492a0c in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#20 0x00007fd23c566816 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#21 0x00007fd23c5485d3 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#22 0x00007fd23c567c09 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#23 0x00007fd2ac492a0c in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#24 0x00007fd2ac4295e9 in QItemSelectionModel::selectionChanged(QItemSelection const&, QItemSelection const&) () at /usr/lib/libQt5Core.so.5
#25 0x00007fd2ac42f1ae in QItemSelectionModel::emitSelectionChanged(QItemSelection const&, QItemSelection const&) () at /usr/lib/libQt5Core.so.5
#26 0x00007fd2ac431b56 in QItemSelectionModel::select(QItemSelection const&, QFlags<QItemSelectionModel::SelectionFlag>) () at /usr/lib/libQt5Core.so.5
#27 0x00007fd2ac42c18d in QItemSelectionModel::select(QModelIndex const&, QFlags<QItemSelectionModel::SelectionFlag>) () at /usr/lib/libQt5Core.so.5
#28 0x00007fd23c541e3d in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#29 0x00007fd23c556d6e in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#30 0x00007fd23c56843c in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#31 0x00007fd2ac492a0c in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#32 0x00007fd23c5666bf in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#33 0x00007fd23c567690 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#34 0x00007fd2ac492a0c in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#35 0x00007fd23c569886 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#36 0x00007fd23c56a606 in  () at /usr/lib/qt/plugins/kcm_fontinst.so
#37 0x00007fd2adde47bf in  () at /usr/lib/libQt5DBus.so.5
#38 0x00007fd2ac4932e2 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#39 0x00007fd2ad46e984 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#40 0x00007fd2ad47625b in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#41 0x00007fd2ac468bc9 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#42 0x00007fd2ac46bc5c in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#43 0x00007fd2ac4bc864 in  () at /usr/lib/libQt5Core.so.5
#44 0x00007fd2a567d368 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#45 0x00007fd2a567d5b1 in  () at /usr/lib/libglib-2.0.so.0
#46 0x00007fd2a567d63e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#47 0x00007fd2ac4bbe49 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#48 0x00007fd29f8d0f72 in  () at /usr/lib/libQt5WaylandClient.so.5
#49 0x00007fd2ac46785c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#50 0x00007fd2ac46fb56 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#51 0x0000559470332d10 in  ()
#52 0x00007fd2abad506b in __libc_start_main () at /usr/lib/libc.so.6
#53 0x0000559470332d9a in _start ()

Reported using DrKonqi