Bug 388419

Application: systemsettings5 (5.11.4)

Qt Version: 5.10.0
Frameworks Version: 5.41.0
Operating System: Linux 4.14.9-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
appearance settings, themes settings,startup screen settings always crashing

The crash can be reproduced every time.

-- Backtrace:
Application: Ρυθμίσεις συστήματος (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f3c1ec74800 (LWP 1789))]

Thread 6 (Thread 0x7f3be262d700 (LWP 1798)):
#0  0x00007f3c1431c664 in g_mutex_unlock () at /usr/lib/libglib-2.0.so.0
#1  0x00007f3c142f4ec8 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f3c142f4fae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f3c1b1af6b4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f3c1b15182b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f3c1af6178e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f3c18fcfa19 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f3c1af66b2d in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f3c165b708a in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f3c1a86e42f in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f3bea58d700 (LWP 1796)):
#0  0x00007f3c1431c664 in g_mutex_unlock () at /usr/lib/libglib-2.0.so.0
#1  0x00007f3c142f380a in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#2  0x00007f3c142f4e76 in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007f3c142f4fae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007f3c1b1af6b4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f3c1b15182b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f3c1af6178e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007f3c18fcfa19 in  () at /usr/lib/libQt5Qml.so.5
#8  0x00007f3c1af66b2d in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f3c165b708a in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f3c1a86e42f in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f3bf2a2c700 (LWP 1795)):
#0  0x00007f3c1431c664 in g_mutex_unlock () at /usr/lib/libglib-2.0.so.0
#1  0x00007f3c142f4d6e in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f3c142f4fae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f3c1b1af6b4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f3c1b15182b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f3c1af6178e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f3c18fcfa19 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f3c1af66b2d in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f3c165b708a in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f3c1a86e42f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f3bfc622700 (LWP 1793)):
#0  0x00007f3c1a863f2b in poll () at /usr/lib/libc.so.6
#1  0x00007f3c142f4ed3 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f3c142f4fae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f3c1b1af6b4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f3c1b15182b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f3c1af6178e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f3c1b5d1416 in  () at /usr/lib/libQt5DBus.so.5
#7  0x00007f3c1af66b2d in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f3c165b708a in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f3c1a86e42f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f3c08dec700 (LWP 1792)):
#0  0x00007f3c1a863f2b in poll () at /usr/lib/libc.so.6
#1  0x00007f3c16e3a8e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007f3c16e3c679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f3c0bb9a7aa in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f3c1af66b2d in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f3c165b708a in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f3c1a86e42f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f3c1ec74800 (LWP 1789)):
[KCrash Handler]
#5  0x00007f3c1cd995b0 in QWidget::style() const () at /usr/lib/libQt5Widgets.so.5
#6  0x00007f3bffe85d81 in dstyle::Style::drawPushButtonLabel(QStyleOption const*, QPainter*, QWidget const*) const () at /usr/lib/qt/plugins/styles/libdstyleplugin.so
#7  0x00007f3bffe7a288 in dstyle::Style::drawControl(QStyle::ControlElement, QStyleOption const*, QPainter*, QWidget const*) const () at /usr/lib/qt/plugins/styles/libdstyleplugin.so
#8  0x00007f3c1cdf42e2 in QCommonStyle::drawControl(QStyle::ControlElement, QStyleOption const*, QPainter*, QWidget const*) const () at /usr/lib/libQt5Widgets.so.5
#9  0x00007f3bffe7a2a1 in dstyle::Style::drawControl(QStyle::ControlElement, QStyleOption const*, QPainter*, QWidget const*) const () at /usr/lib/qt/plugins/styles/libdstyleplugin.so
#10 0x00007f3bf119d84f in  () at /usr/lib/qt/qml/QtQuick/Controls/libqtquickcontrolsplugin.so
#11 0x00007f3bf119e3e6 in  () at /usr/lib/qt/qml/QtQuick/Controls/libqtquickcontrolsplugin.so
#12 0x00007f3c194f6233 in QQuickWindowPrivate::polishItems() () at /usr/lib/libQt5Quick.so.5
#13 0x00007f3c19b81eb6 in  () at /usr/lib/libQt5QuickWidgets.so.5
#14 0x00007f3c19b84e4e in QQuickWidget::resizeEvent(QResizeEvent*) () at /usr/lib/libQt5QuickWidgets.so.5
#15 0x00007f3c1cdb3a12 in QWidget::event(QEvent*) () at /usr/lib/libQt5Widgets.so.5
#16 0x00007f3c19b85b1c in QQuickWidget::event(QEvent*) () at /usr/lib/libQt5QuickWidgets.so.5
#17 0x00007f3c1cd72e3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#18 0x00007f3c1cd7a816 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#19 0x00007f3c1b1531e0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#20 0x00007f3c1cdab67d in QWidgetPrivate::sendPendingMoveAndResizeEvents(bool, bool) () at /usr/lib/libQt5Widgets.so.5
#21 0x00007f3c1cdaf6d4 in QWidgetPrivate::show_helper() () at /usr/lib/libQt5Widgets.so.5
#22 0x00007f3c1cdb29c9 in QWidget::setVisible(bool) () at /usr/lib/libQt5Widgets.so.5
#23 0x00007f3c1cdb1fb2 in  () at /usr/lib/libQt5Widgets.so.5
#24 0x00007f3c1b184452 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#25 0x00007f3c1cdb356c in QWidget::event(QEvent*) () at /usr/lib/libQt5Widgets.so.5
#26 0x00007f3c19b85b1c in QQuickWidget::event(QEvent*) () at /usr/lib/libQt5QuickWidgets.so.5
#27 0x00007f3c1cd72e3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#28 0x00007f3c1cd7a816 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#29 0x00007f3c1b1531e0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#30 0x00007f3c1b155e46 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#31 0x00007f3c1b1b00a4 in  () at /usr/lib/libQt5Core.so.5
#32 0x00007f3c142f3270 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#33 0x00007f3c142f4f69 in  () at /usr/lib/libglib-2.0.so.0
#34 0x00007f3c142f4fae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#35 0x00007f3c1b1af691 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#36 0x00007f3c0bc22152 in  () at /usr/lib/libQt5XcbQpa.so.5
#37 0x00007f3c1b15182b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#38 0x00007f3c1b15ab18 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#39 0x0000556aec2a2cca in  ()
#40 0x00007f3c1a798f4a in __libc_start_main () at /usr/lib/libc.so.6
#41 0x0000556aec2a2d4a in _start ()

Reported using DrKonqi