Application: kwin_x11 (5.8.6)

Qt Version: 5.6.1
Frameworks Version: 5.26.0
Operating System: Linux 4.4.49-16-default x86_64
Distribution: "openSUSE Leap 42.2"

-- Information about the crash:
- What I was doing when the application crashed:
Clicking on a window, and suddenly I notice the bug message.  No consistancy in the occurance of this event.

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fced9d0e940 (LWP 2063))]

Thread 7 (Thread 0x7fceadc1a700 (LWP 2461)):
#0  0x00007fced68e24c0 in clock_gettime@plt () at /usr/lib64/libQt5Core.so.5
#1  0x00007fced69b8826 in  () at /usr/lib64/libQt5Core.so.5
#2  0x00007fced6b1e989 in QTimerInfoList::updateCurrentTime() () at /usr/lib64/libQt5Core.so.5
#3  0x00007fced6b1ef05 in QTimerInfoList::timerWait(timespec&) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fced6b1e58a in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fced6acdfdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007fced6908f1a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#7  0x00007fced149a9c8 in  () at /usr/lib64/libQt5Qml.so.5
#8  0x00007fced690d9e9 in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007fced9736734 in start_thread () at /lib64/libpthread.so.0
#10 0x00007fced946fd3d in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7fce1c48d700 (LWP 2196)):
#0  0x00007fced973b0af in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fce27988533 in  () at /usr/lib64/dri/r600_dri.so
#2  0x00007fce27987d57 in  () at /usr/lib64/dri/r600_dri.so
#3  0x00007fced9736734 in start_thread () at /lib64/libpthread.so.0
#4  0x00007fced946fd3d in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7fceaece4700 (LWP 2153)):
#0  0x00007fced973b0af in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fced5a8993b in  () at /usr/lib64/libQt5Script.so.5
#2  0x00007fced5a89969 in  () at /usr/lib64/libQt5Script.so.5
#3  0x00007fced9736734 in start_thread () at /lib64/libpthread.so.0
#4  0x00007fced946fd3d in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7fceafd5d700 (LWP 2149)):
#0  0x00007fced9468b03 in select () at /lib64/libc.so.6
#1  0x00007fced6b1c849 in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib64/libQt5Core.so.5
#2  0x00007fced6b1e0c3 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5
#3  0x00007fced6b1e527 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fced6acdfdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fced6908f1a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fced149a9c8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fced690d9e9 in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fced9736734 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fced946fd3d in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7fcebe345700 (LWP 2102)):
#0  0x00007fced9468b03 in select () at /lib64/libc.so.6
#1  0x00007fced6b1c849 in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib64/libQt5Core.so.5
#2  0x00007fced6b1e0c3 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5
#3  0x00007fced6b1e527 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fced6acdfdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fced6908f1a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fced066d1d5 in  () at /usr/lib64/libQt5DBus.so.5
#7  0x00007fced690d9e9 in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fced9736734 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fced946fd3d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7fcec0245700 (LWP 2083)):
#0  0x00007fced946749d in poll () at /lib64/libc.so.6
#1  0x00007fced85e13e2 in  () at /usr/lib64/libxcb.so.1
#2  0x00007fced85e2fcf in xcb_wait_for_event () at /usr/lib64/libxcb.so.1
#3  0x00007fcec0f07839 in  () at /usr/lib64/libQt5XcbQpa.so.5
#4  0x00007fced690d9e9 in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007fced9736734 in start_thread () at /lib64/libpthread.so.0
#6  0x00007fced946fd3d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7fced9d0e940 (LWP 2063)):
[KCrash Handler]
#6  0x00007fced1486de0 in QQmlBinding::write(QQmlPropertyData const&, QV4::Value const&, bool, QFlags<QQmlPropertyPrivate::WriteFlag>) () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fced148825a in QQmlBinding::update(QFlags<QQmlPropertyPrivate::WriteFlag>) () at /usr/lib64/libQt5Qml.so.5
#8  0x00007fced1491306 in  () at /usr/lib64/libQt5Qml.so.5
#9  0x00007fced141f94b in QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) () at /usr/lib64/libQt5Qml.so.5
#10 0x00007fced141fa07 in QQmlComponentPrivate::completeCreate() () at /usr/lib64/libQt5Qml.so.5
#11 0x00007fced141f890 in QQmlComponent::create(QQmlContext*) () at /usr/lib64/libQt5Qml.so.5
#12 0x00007fceafd7c7cf in  () at /usr/lib64/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#13 0x00007fced908b097 in  () at /usr/lib64/libkwin.so.5
#14 0x00007fced8f6f761 in KWin::Client::createDecoration(QRect const&) () at /usr/lib64/libkwin.so.5
#15 0x00007fced8f7047b in KWin::Client::updateDecoration(bool, bool) () at /usr/lib64/libkwin.so.5
#16 0x00007fced8fd1db6 in KWin::Client::manage(unsigned int, bool) () at /usr/lib64/libkwin.so.5
#17 0x00007fced8f537e4 in KWin::Workspace::createClient(unsigned int, bool) () at /usr/lib64/libkwin.so.5
#18 0x00007fced8fbffc0 in KWin::Workspace::workspaceEvent(xcb_generic_event_t*) () at /usr/lib64/libkwin.so.5
#19 0x00007fced6acd270 in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib64/libQt5Core.so.5
#20 0x00007fcec0f05be4 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib64/libQt5XcbQpa.so.5
#21 0x00007fcec0f07c3b in QXcbConnection::processXcbEvents() () at /usr/lib64/libQt5XcbQpa.so.5
#22 0x00007fced6afb166 in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5
#23 0x00007fced77dae3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#24 0x00007fced77df49a in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#25 0x00007fced6acffc5 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#26 0x00007fced6ad1daa in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/libQt5Core.so.5
#27 0x00007fced6b1e4b4 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#28 0x00007fcec0f6994d in  () at /usr/lib64/libQt5XcbQpa.so.5
#29 0x00007fced6acdfdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#30 0x00007fced6ad5ec6 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5
#31 0x00007fced99579cc in kdemain () at /usr/lib64/libkdeinit5_kwin_x11.so
#32 0x00007fced93a66e5 in __libc_start_main () at /lib64/libc.so.6
#33 0x0000000000400809 in _start ()

Reported using DrKonqi