Bug 347888

Application: systemsettings5 (5.3.0)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-16-generic x86_64
Distribution: Ubuntu 15.04

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

I've opened System Settings, swithed between some setting groups and close it without any changes.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Параметры системы (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7feaacde1780 (LWP 6070))]

Thread 4 (Thread 0x7fea9c43a700 (LWP 6071)):
#0  0x00007feaa95578dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007feaa7871b72 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007feaa787364f in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fea9e985099 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#4  0x00007feaa9bd8b0e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007feaa678b6aa in start_thread (arg=0x7fea9c43a700) at pthread_create.c:333
#6  0x00007feaa9562eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fea8c2a3700 (LWP 6075)):
#0  0x00007feaa95578dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007feaa626cebc in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7fea84003070, timeout=-1, context=0x7fea84000990) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:4103
#2  0x00007feaa626cebc in g_main_context_iterate (context=context@entry=0x7fea84000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:3803
#3  0x00007feaa626cfcc in g_main_context_iteration (context=0x7fea84000990, may_block=1) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:3869
#4  0x00007feaa9e6fc6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007feaa9e143e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007feaa9bd3b44 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007feaa8b9ef65 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007feaa9bd8b0e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007feaa678b6aa in start_thread (arg=0x7fea8c2a3700) at pthread_create.c:333
#10 0x00007feaa9562eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fea839be700 (LWP 6084)):
#0  0x00007feaa62b1789 in g_mutex_lock (mutex=mutex@entry=0x7fea7c000990) at /build/buildd/glib2.0-2.44.0/./glib/gthread-posix.c:1342
#1  0x00007feaa626c641 in g_main_context_query (context=context@entry=0x7fea7c000990, max_priority=2147483647, timeout=timeout@entry=0x7fea839bdce4, fds=fds@entry=0x7fea7c002e70, n_fds=n_fds@entry=1) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:3512
#2  0x00007feaa626ce37 in g_main_context_iterate (context=context@entry=0x7fea7c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:3790
#3  0x00007feaa626cfcc in g_main_context_iteration (context=0x7fea7c000990, may_block=1) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:3869
#4  0x00007feaa9e6fc6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007feaa9e143e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007feaa9bd3b44 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007feaa8b9ef65 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007feaa9bd8b0e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007feaa678b6aa in start_thread (arg=0x7fea839be700) at pthread_create.c:333
#10 0x00007feaa9562eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7feaacde1780 (LWP 6070)):
[KCrash Handler]
#6  0x00007feaa8abff97 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007feaa8a6a151 in QV4::ExecutionEngine::~ExecutionEngine() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007feaa8ba20d5 in QV8Engine::~QV8Engine() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007feaa8ba22b9 in QV8Engine::~QV8Engine() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007feaa8a07061 in QJSEngine::~QJSEngine() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007feaa8b043c5 in QQmlEngine::~QQmlEngine() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007feaa8b04499 in QQmlEngine::~QQmlEngine() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007fea821f6242 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#14 0x00007fea821fa3f8 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#15 0x00007fea821fa419 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#16 0x00007feaa9e48778 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007feaaac02b2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007feaaac08000 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007feaa9e16c2b in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007feaa9e18c9b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007feaa8647b6e in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#22 0x00007feaa8679463 in QQuickWindow::~QQuickWindow() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#23 0x00007feaa8728a49 in QQuickView::~QQuickView() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#24 0x00007feaaac61dd5 in QWindowContainer::~QWindowContainer() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#25 0x00007feaaac61df9 in QWindowContainer::~QWindowContainer() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007feaa9e4618c in QObjectPrivate::deleteChildren() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007feaaac4257a in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#28 0x00007feaaac427e9 in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#29 0x00007feaa9e4618c in QObjectPrivate::deleteChildren() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007feaaac4257a in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#31 0x00007fea83df54fe in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_kwindecoration.so
#32 0x00007feaa9e4618c in QObjectPrivate::deleteChildren() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x00007feaaac4257a in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#34 0x00007feaab6e61c7 in KCModule::~KCModule() () at /usr/lib/x86_64-linux-gnu/libKF5ConfigWidgets.so.5
#35 0x00007fea83df01a1 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_kwindecoration.so
#36 0x00007feaac969e34 in KCModuleProxy::deleteClient() () at /usr/lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#37 0x00007feaac969f36 in KCModuleProxy::~KCModuleProxy() () at /usr/lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#38 0x00007feaac96a049 in KCModuleProxy::~KCModuleProxy() () at /usr/lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#39 0x00007feaa9e4618c in QObjectPrivate::deleteChildren() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#40 0x00007feaaac4257a in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#41 0x00007feaaac427e9 in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#42 0x00007feaa9e4618c in QObjectPrivate::deleteChildren() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#43 0x00007feaaac4257a in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#44 0x00007feaaadd1059 in QScrollArea::~QScrollArea() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#45 0x00007feaa9e4618c in QObjectPrivate::deleteChildren() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#46 0x00007feaaac4257a in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#47 0x00007feaab227c5e in  () at /usr/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#48 0x00007feaa9e4618c in QObjectPrivate::deleteChildren() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#49 0x00007feaaac4257a in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#50 0x00007feaab22b5d9 in KPageWidget::~KPageWidget() () at /usr/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#51 0x00007feaa9e4618c in QObjectPrivate::deleteChildren() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#52 0x00007feaaac4257a in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#53 0x00007feaacb9bbd9 in ModuleView::~ModuleView() () at /usr/lib/x86_64-linux-gnu/libsystemsettingsview.so.3
#54 0x00007feaa9e4618c in QObjectPrivate::deleteChildren() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#55 0x00007feaaac4257a in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#56 0x00007feaaada1e79 in QStackedWidget::~QStackedWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#57 0x00007feaa9e4618c in QObjectPrivate::deleteChildren() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#58 0x00007feaaac4257a in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#59 0x00007feaaada1e79 in QStackedWidget::~QStackedWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#60 0x00007feaa9e4618c in QObjectPrivate::deleteChildren() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#61 0x00007feaaac4257a in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#62 0x00007feaabdaa2a0 in KMainWindow::~KMainWindow() () at /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#63 0x0000000000411d68 in SettingsBase::~SettingsBase() ()
#64 0x0000000000411dd9 in SettingsBase::~SettingsBase() ()
#65 0x00007feaa9e48778 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#66 0x00007feaaac46377 in QWidget::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#67 0x00007feaaad5b52b in QMainWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#68 0x00007feaabdaa737 in KMainWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#69 0x00007feaabde3f85 in KXmlGuiWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#70 0x00007feaaac02b2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#71 0x00007feaaac08000 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#72 0x00007feaa9e16c2b in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#73 0x00007feaa9e18c9b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#74 0x00007feaa9e6f843 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#75 0x00007feaa626cc3d in g_main_context_dispatch (context=0x7fea940016f0) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:3122
#76 0x00007feaa626cc3d in g_main_context_dispatch (context=context@entry=0x7fea940016f0) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:3737
#77 0x00007feaa626cf20 in g_main_context_iterate (context=context@entry=0x7fea940016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:3808
#78 0x00007feaa626cfcc in g_main_context_iteration (context=0x7fea940016f0, may_block=1) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:3869
#79 0x00007feaa9e6fc57 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#80 0x00007feaa9e143e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#81 0x00007feaa9e1c02c in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#82 0x000000000040ef5b in main ()

Reported using DrKonqi