Bug 384712

Application: systemsettings5 (5.10.95)

Qt Version: 5.9.1
Frameworks Version: 5.38.0
Operating System: Linux 4.13.2-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
- What I was doing when the application crashed: Open systemsettings on Wayland and change e.g. the DPI settings in the fonts. Save and close the window. Then systemsettings will crash.
- Unusual behavior I noticed: Application doesn't close as it should.

- Custom settings of the application: Change DPI

The crash can be reproduced every time.

-- Backtrace:
Application: Systemeinstellungen (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f74a55f4d40 (LWP 2212))]

Thread 5 (Thread 0x7f746489e700 (LWP 2232)):
#0  0x00007f74a123dcbb in poll () from /usr/lib/libc.so.6
#1  0x00007f7491ad97c3 in ?? () from /usr/lib/libpulse.so.0
#2  0x00007f7491acac20 in pa_mainloop_poll () from /usr/lib/libpulse.so.0
#3  0x00007f7491acb2c1 in pa_mainloop_iterate () from /usr/lib/libpulse.so.0
#4  0x00007f7491acb351 in pa_mainloop_run () from /usr/lib/libpulse.so.0
#5  0x00007f7491ad96fe in ?? () from /usr/lib/libpulse.so.0
#6  0x00007f749167288c in ?? () from /usr/lib/pulseaudio/libpulsecommon-11.0.so
#7  0x00007f749cfe708a in start_thread () from /usr/lib/libpthread.so.0
#8  0x00007f74a12481bf in clone () from /usr/lib/libc.so.6

Thread 4 (Thread 0x7f747b297700 (LWP 2216)):
#0  0x00007f74a123dcbb in poll () from /usr/lib/libc.so.6
#1  0x00007f749ae01c09 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f749ae01d1c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f74a1b7a084 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007f74a1b1dffb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f74a193740e in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f749f9d23d9 in ?? () from /usr/lib/libQt5Qml.so.5
#7  0x00007f74a193c15b in ?? () from /usr/lib/libQt5Core.so.5
#8  0x00007f749cfe708a in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f74a12481bf in clone () from /usr/lib/libc.so.6

Thread 3 (Thread 0x7f7483604700 (LWP 2215)):
#0  0x00007f749ae46a69 in g_mutex_lock () from /usr/lib/libglib-2.0.so.0
#1  0x00007f749ae00a90 in g_main_context_acquire () from /usr/lib/libglib-2.0.so.0
#2  0x00007f749ae01ac5 in ?? () from /usr/lib/libglib-2.0.so.0
#3  0x00007f749ae01d1c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#4  0x00007f74a1b7a084 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f74a1b1dffb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#6  0x00007f74a193740e in QThread::exec() () from /usr/lib/libQt5Core.so.5
#7  0x00007f749f9d23d9 in ?? () from /usr/lib/libQt5Qml.so.5
#8  0x00007f74a193c15b in ?? () from /usr/lib/libQt5Core.so.5
#9  0x00007f749cfe708a in start_thread () from /usr/lib/libpthread.so.0
#10 0x00007f74a12481bf in clone () from /usr/lib/libc.so.6

Thread 2 (Thread 0x7f7490182700 (LWP 2214)):
#0  0x00007f74a123dcbb in poll () from /usr/lib/libc.so.6
#1  0x00007f749ae01c09 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f749ae01d1c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f74a1b7a084 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007f74a1b1dffb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f74a193740e in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f74a1f99396 in ?? () from /usr/lib/libQt5DBus.so.5
#7  0x00007f74a193c15b in ?? () from /usr/lib/libQt5Core.so.5
#8  0x00007f749cfe708a in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f74a12481bf in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7f74a55f4d40 (LWP 2212)):
[KCrash Handler]
#5  0x00007f749dac8e2e in _XSend () from /usr/lib/libX11.so.6
#6  0x00007f749dac9280 in _XFlush () from /usr/lib/libX11.so.6
#7  0x00007f749dacbe25 in _XGetRequest () from /usr/lib/libX11.so.6
#8  0x00007f749dabf56d in XQueryExtension () from /usr/lib/libX11.so.6
#9  0x00007f749dab30e2 in XInitExtension () from /usr/lib/libX11.so.6
#10 0x00007f7492332b4d in XRenderFindDisplay () from /usr/lib/libXrender.so.1
#11 0x00007f7492332e71 in XRenderQueryExtension () from /usr/lib/libXrender.so.1
#12 0x00007f74353aaa47 in ?? () from /usr/lib/libXft.so.2
#13 0x00007f74353aaede in XftDefaultHasRender () from /usr/lib/libXft.so.2
#14 0x00007f74353ab410 in XftDefaultSubstitute () from /usr/lib/libXft.so.2
#15 0x00007f74353add45 in XftFontMatch () from /usr/lib/libXft.so.2
#16 0x00007f74353aded3 in XftFontOpen () from /usr/lib/libXft.so.2
#17 0x00007f74357db51a in KFI::CFcEngine::getFont(int) () from /usr/lib/libkfontinstui.so.5
#18 0x00007f74357db9e4 in KFI::CFcEngine::queryFont() () from /usr/lib/libkfontinstui.so.5
#19 0x00007f74357dc199 in KFI::CFcEngine::getSizes() () from /usr/lib/libkfontinstui.so.5
#20 0x00007f74357dd889 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>*) () from /usr/lib/libkfontinstui.so.5
#21 0x00007f7435a063ea in ?? () from /usr/lib/qt/plugins/kcm_fontinst.so
#22 0x00007f7435a363f7 in ?? () from /usr/lib/qt/plugins/kcm_fontinst.so
#23 0x00007f7435a4c52a in ?? () from /usr/lib/qt/plugins/kcm_fontinst.so
#24 0x00007f74a1b4f786 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQt5Core.so.5
#25 0x00007f7435a4a9a6 in ?? () from /usr/lib/qt/plugins/kcm_fontinst.so
#26 0x00007f7435a27e33 in ?? () from /usr/lib/qt/plugins/kcm_fontinst.so
#27 0x00007f7435a4bca9 in ?? () from /usr/lib/qt/plugins/kcm_fontinst.so
#28 0x00007f74a1b4f786 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQt5Core.so.5
#29 0x00007f74a1acb058 in QItemSelectionModel::selectionChanged(QItemSelection const&, QItemSelection const&) () from /usr/lib/libQt5Core.so.5
#30 0x00007f74a1acf971 in QItemSelectionModel::emitSelectionChanged(QItemSelection const&, QItemSelection const&) () from /usr/lib/libQt5Core.so.5
#31 0x00007f74a1ad2186 in QItemSelectionModel::select(QItemSelection const&, QFlags<QItemSelectionModel::SelectionFlag>) () from /usr/lib/libQt5Core.so.5
#32 0x00007f74a1acd01d in QItemSelectionModel::select(QModelIndex const&, QFlags<QItemSelectionModel::SelectionFlag>) () from /usr/lib/libQt5Core.so.5
#33 0x00007f7435a211bd in ?? () from /usr/lib/qt/plugins/kcm_fontinst.so
#34 0x00007f7435a3a2ae in ?? () from /usr/lib/qt/plugins/kcm_fontinst.so
#35 0x00007f7435a4c63c in ?? () from /usr/lib/qt/plugins/kcm_fontinst.so
#36 0x00007f74a1b4f786 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQt5Core.so.5
#37 0x00007f7435a4a84f in ?? () from /usr/lib/qt/plugins/kcm_fontinst.so
#38 0x00007f7435a4b730 in ?? () from /usr/lib/qt/plugins/kcm_fontinst.so
#39 0x00007f74a1b4f786 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQt5Core.so.5
#40 0x00007f7435a4da28 in ?? () from /usr/lib/qt/plugins/kcm_fontinst.so
#41 0x00007f7435a4fec6 in ?? () from /usr/lib/qt/plugins/kcm_fontinst.so
#42 0x00007f74a1fa4add in ?? () from /usr/lib/libQt5DBus.so.5
#43 0x00007f74a1b501d2 in QObject::event(QEvent*) () from /usr/lib/libQt5Core.so.5
#44 0x00007f74a36ece4c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#45 0x00007f74a36f4926 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#46 0x00007f74a1b1fbd0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/libQt5Core.so.5
#47 0x00007f74a1b22426 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQt5Core.so.5
#48 0x00007f74a1b7aa74 in ?? () from /usr/lib/libQt5Core.so.5
#49 0x00007f749ae01a57 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#50 0x00007f749ae01c88 in ?? () from /usr/lib/libglib-2.0.so.0
#51 0x00007f749ae01d1c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#52 0x00007f74a1b7a061 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#53 0x00007f74a1b1dffb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#54 0x00007f74a1b27048 in QCoreApplication::exec() () from /usr/lib/libQt5Core.so.5
#55 0x0000559d1062fc34 in ?? ()
#56 0x00007f74a1172f6a in __libc_start_main () from /usr/lib/libc.so.6
#57 0x0000559d1062fcba in _start ()

Reported using DrKonqi