Bug 360130

Application: systemsettings5 (5.5.95)

Qt Version: 5.6.0
Frameworks Version: Unknown
Operating System: Linux 4.4.4-desktop-1.mga6 x86_64
Distribution: "Mageia 6"

-- Information about the crash:
- What I was doing when the application crashed:
I've opened System Settings, selected "Look of workspace" and after ~2 sec. it crashed.

-- Backtrace:
Application: Ustawienia systemowe (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb96587e800 (LWP 21579))]

Thread 4 (Thread 0x7fb954336700 (LWP 21580)):
#0  0x00007fb961f4ff5d in poll () at /lib64/libc.so.6
#1  0x00007fb95ff03ac2 in _xcb_conn_wait () at /lib64/libxcb.so.1
#2  0x00007fb95ff05697 in xcb_wait_for_event () at /lib64/libxcb.so.1
#3  0x00007fb956866809 in QXcbEventReader::run() (this=0xb103c0) at qxcbconnection.cpp:1313
#4  0x00007fb962641649 in QThreadPrivate::start(void*) (arg=0xb103c0) at thread/qthread_unix.cpp:340
#5  0x00007fb95f69065d in start_thread () at /lib64/libpthread.so.0
#6  0x00007fb961f5bdad in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7fb94bfff700 (LWP 21581)):
#0  0x00007fb95f1b3a64 in g_mutex_unlock () at /lib64/libglib-2.0.so.0
#1  0x00007fb95f170409 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007fb95f17051c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007fb962856a4b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fb9440008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#4  0x00007fb96280234a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fb94bffeda0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fb96263ca3c in QThread::exec() (this=this@entry=0x7fb965a2dd40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:503
#6  0x00007fb9659bd3e5 in QDBusConnectionManager::run() (this=0x7fb965a2dd40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:181
#7  0x00007fb962641649 in QThreadPrivate::start(void*) (arg=0x7fb965a2dd40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:340
#8  0x00007fb95f69065d in start_thread () at /lib64/libpthread.so.0
#9  0x00007fb961f5bdad in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7fb942e7a700 (LWP 21586)):
#0  0x00007fb95f1b3a64 in g_mutex_unlock () at /lib64/libglib-2.0.so.0
#1  0x00007fb95f16fa30 in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#2  0x00007fb95f170343 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007fb95f17051c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007fb962856a4b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fb93c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#5  0x00007fb96280234a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fb942e79db0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fb96263ca3c in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fb960fda835 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#8  0x00007fb962641649 in QThreadPrivate::start(void*) (arg=0xf3b5e0) at thread/qthread_unix.cpp:340
#9  0x00007fb95f69065d in start_thread () at /lib64/libpthread.so.0
#10 0x00007fb961f5bdad in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7fb96587e800 (LWP 21579)):
[KCrash Handler]
#6  0x00007fb941dd9eb2 in QQuickStyleItem::updatePaintNode(QSGNode*, QQuickItem::UpdatePaintNodeData*) (this=<optimized out>) at /usr/lib64/qt5/include/QtQuick/5.6.0/QtQuick/private/qquickitem_p.h:877
#7  0x00007fb941dd9eb2 in QQuickStyleItem::updatePaintNode(QSGNode*, QQuickItem::UpdatePaintNodeData*) (this=0x10a2050, node=0x0) at Private/qquickstyleitem.cpp:1830
#8  0x00007fb96129f460 in QQuickWindowPrivate::updateDirtyNode(QQuickItem*) () at /lib64/libQt5Quick.so.5
#9  0x00007fb96129fc50 in QQuickWindowPrivate::updateDirtyNodes() () at /lib64/libQt5Quick.so.5
#10 0x00007fb9612a0bee in QQuickWindowPrivate::syncSceneGraph() () at /lib64/libQt5Quick.so.5
#11 0x00007fb961270e56 in QSGGuiThreadRenderLoop::renderWindow(QQuickWindow*) () at /lib64/libQt5Quick.so.5
#12 0x00007fb961272420 in QSGGuiThreadRenderLoop::exposureChanged(QQuickWindow*) () at /lib64/libQt5Quick.so.5
#13 0x00007fb963746c5b in QWindow::event(QEvent*) (this=0x102f0a0, ev=<optimized out>) at kernel/qwindow.cpp:2096
#14 0x00007fb9612a9c65 in QQuickWindow::event(QEvent*) () at /lib64/libQt5Quick.so.5
#15 0x00007fb963d5440c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=<optimized out>, receiver=0x102f0a0, e=0x7fffc67d2fe0) at kernel/qapplication.cpp:3714
#16 0x00007fb963d592b6 in QApplication::notify(QObject*, QEvent*) (this=0x7fffc67d33a0, receiver=0x102f0a0, e=0x7fffc67d2fe0) at kernel/qapplication.cpp:3495
#17 0x00007fb962804498 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=receiver@entry=0x102f0a0, event=event@entry=0x7fffc67d2fe0) at kernel/qcoreapplication.cpp:1015
#18 0x00007fb96373d497 in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) (event=0x7fffc67d2fe0, receiver=0x102f0a0) at ../../src/corelib/kernel/qcoreapplication.h:230
#19 0x00007fb96373d497 in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) (e=0x102f790) at kernel/qguiapplication.cpp:2732
#20 0x00007fb96373df9d in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) (e=<optimized out>) at kernel/qguiapplication.cpp:1714
#21 0x00007fb96371c89b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) (flags=...) at kernel/qwindowsysteminterface.cpp:645
#22 0x00007fb956897810 in userEventSourceDispatch(GSource*, GSourceFunc, gpointer) (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#23 0x00007fb95f170247 in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#24 0x00007fb95f170478 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#25 0x00007fb95f17051c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#26 0x00007fb962856a26 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0xb37580, flags=...) at kernel/qeventdispatcher_glib.cpp:417
#27 0x00007fb96280234a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fffc67d3290, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#28 0x00007fb96280a701 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1285
#29 0x000000000040bf7e in main ()

Reported using DrKonqi