Bug 392087

Application: kwin_x11 (5.8.7)

Qt Version: 5.6.2
Frameworks Version: 5.32.0
Operating System: Linux 4.4.114-42-default x86_64
Distribution: "openSUSE Leap 42.3"

-- Information about the crash:
After having logged in to KDE (on openSUSE 42.3), the KDE crash assistant came up while starting up the desktop.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f1620948940 (LWP 3126))]

Thread 6 (Thread 0x7f15e3cca700 (LWP 3266)):
#0  0x00007f16203770ff in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f161c6fb93b in  () at /usr/lib64/libQt5Script.so.5
#2  0x00007f161c6fb969 in  () at /usr/lib64/libQt5Script.so.5
#3  0x00007f1620372724 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f16200b1e8d in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f15fddad700 (LWP 3230)):
[KCrash Handler]
#6  0x00007f161d66a8be in QLockFile::tryLock(int) () at /usr/lib64/libQt5Core.so.5
#7  0x00007f161f470369 in  () at /usr/lib64/libKF5ConfigCore.so.5
#8  0x00007f161f45ce03 in KConfig::sync() () at /usr/lib64/libKF5ConfigCore.so.5
#9  0x00007f16046e7c6c in  () at /usr/lib64/qt5/plugins/org.kde.kwin.platforms/KWinX11Platform.so
#10 0x00007f161d757de3 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#11 0x00007f161d764dd2 in QTimer::timerEvent(QTimerEvent*) () at /usr/lib64/libQt5Core.so.5
#12 0x00007f161d758bf4 in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5
#13 0x00007f161e42e28c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#14 0x00007f161e4328ea in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#15 0x00007f161d72dbe5 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#16 0x00007f161d77dafe in QTimerInfoList::activateTimers() () at /usr/lib64/libQt5Core.so.5
#17 0x00007f161d77c448 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#18 0x00007f161d72bbfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#19 0x00007f161d566f5a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#20 0x00007f161d56ba29 in  () at /usr/lib64/libQt5Core.so.5
#21 0x00007f1620372724 in start_thread () at /lib64/libpthread.so.0
#22 0x00007f16200b1e8d in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f15fedee700 (LWP 3227)):
#0  0x00007f16200aa973 in select () at /lib64/libc.so.6
#1  0x00007f161d77a6c9 in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f161d77bf43 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5
#3  0x00007f161d77c3a7 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f161d72bbfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f161d566f5a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f161811a3d8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007f161d56ba29 in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007f1620372724 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f16200b1e8d in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f1606806700 (LWP 3142)):
#0  0x00007f16200a930d in poll () at /lib64/libc.so.6
#1  0x00007f161f22a3c2 in  () at /usr/lib64/libxcb.so.1
#2  0x00007f161f22bfaf in xcb_wait_for_event () at /usr/lib64/libxcb.so.1
#3  0x00007f16074b70d9 in  () at /usr/lib64/libQt5XcbQpa.so.5
#4  0x00007f161d56ba29 in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f1620372724 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f16200b1e8d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f1609802700 (LWP 3138)):
#0  0x00007f1620379e2d in read () at /lib64/libpthread.so.0
#1  0x00007f16163ae750 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f161636de49 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f161636e2a8 in  () at /usr/lib64/libglib-2.0.so.0
#4  0x00007f161636e42c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#5  0x00007f161d77e1ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007f161d72bbfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#7  0x00007f161d566f5a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#8  0x00007f16172f0295 in  () at /usr/lib64/libQt5DBus.so.5
#9  0x00007f161d56ba29 in  () at /usr/lib64/libQt5Core.so.5
#10 0x00007f1620372724 in start_thread () at /lib64/libpthread.so.0
#11 0x00007f16200b1e8d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f1620948940 (LWP 3126)):
#0  0x00007f16203770ff in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f161d56c69b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f161d56b626 in QThread::wait(unsigned long) () at /usr/lib64/libQt5Core.so.5
#3  0x00007f16046e7a92 in KWin::X11StandalonePlatform::createOpenGLSafePoint(KWin::Platform::OpenGLSafePoint) () at /usr/lib64/qt5/plugins/org.kde.kwin.platforms/KWinX11Platform.so
#4  0x00007f161fc481ea in KWin::Compositor::performCompositing() () at /usr/lib64/libkwin.so.5
#5  0x00007f161d758bf4 in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5
#6  0x00007f161e42e28c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#7  0x00007f161e4328ea in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#8  0x00007f161d72dbe5 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#9  0x00007f161d77dafe in QTimerInfoList::activateTimers() () at /usr/lib64/libQt5Core.so.5
#10 0x00007f161d77c448 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#11 0x00007f160751de3d in  () at /usr/lib64/libQt5XcbQpa.so.5
#12 0x00007f161d72bbfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#13 0x00007f161d733ae6 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5
#14 0x00007f16205909cc in kdemain () at /usr/lib64/libkdeinit5_kwin_x11.so
#15 0x00007f161ffe5725 in __libc_start_main () at /lib64/libc.so.6
#16 0x0000000000400809 in _start ()

Reported using DrKonqi