Application: systemsettings5 (5.2.2)

Qt Version: 5.4.1
Operating System: Linux 4.0.0-040000-generic x86_64
Distribution: Ubuntu 15.04

-- Information about the crash:
- What I was doing when the application crashed:
Installed some top window decorations. Now after launching System settings it crashing all the time.

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fcab2882780 (LWP 10006))]

Thread 4 (Thread 0x7fcaa1ee9700 (LWP 10007)):
#0  0x00007fcaaf0088dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fcaad322b72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fcaad32464f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fcaa4434099 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#4  0x00007fcaaf689b0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fcaac23c6aa in start_thread (arg=0x7fcaa1ee9700) at pthread_create.c:333
#6  0x00007fcaaf013eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fca916d8700 (LWP 10064)):
#0  0x00007fcaabd627a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fcaabd1deb1 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcaabd1dfcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fcaaf920c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fcaaf8c53e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fcaaf684b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fcaae64ff65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fcaaf689b0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fcaac23c6aa in start_thread (arg=0x7fca916d8700) at pthread_create.c:333
#9  0x00007fcaaf013eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fca8a20e700 (LWP 10065)):
#0  0x00007fcaaf00449d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fcaabd612f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcaabd1d96c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fcaabd1de60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fcaabd1dfcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fcaaf920c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fcaaf8c53e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fcaaf684b44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fcaae64ff65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007fcaaf689b0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fcaac23c6aa in start_thread (arg=0x7fca8a20e700) at pthread_create.c:333
#11 0x00007fcaaf013eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fcab2882780 (LWP 10006)):
[KCrash Handler]
#6  0x0000006500000065 in ?? ()
#7  0x00007fcaae0d4628 in QSGOpaqueTextureMaterial::setTexture(QSGTexture*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007fcaae0d3d3c in QSGSimpleTextureNode::setTexture(QSGTexture*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007fca9019ec9a in ?? () from /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/core/libcorebindingsplugin.so
#10 0x00007fcaae1274bf in QQuickWindowPrivate::updateDirtyNode(QQuickItem*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007fcaae1284cb in QQuickWindowPrivate::updateDirtyNodes() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007fcaae128d80 in QQuickWindowPrivate::syncSceneGraph() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x00007fcaae0f7f05 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x00007fcaae0f8979 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007fcab06b3b2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007fcab06b9000 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007fcaaf8c7c2b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007fcaaf91fae5 in QTimerInfoList::activateTimers() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007fcaaf91ff61 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007fcaabd1dc3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007fcaabd1df20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007fcaabd1dfcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007fcaaf920c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007fcaaf8c53e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007fcaaf8cd02c in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x000000000040eebc in main ()

Reported using DrKonqi