Bug 374282

Application: kwin_x11 (5.8.5)

Qt Version: 5.7.1
Frameworks Version: 5.29.0
Operating System: Linux 4.8.13-1-ARCH x86_64
Distribution: "Arch Linux"

-- Information about the crash:
Logged in with LightDM, waiting for plasma to start, then crash.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fd72df7a840 (LWP 891))]

Thread 9 (Thread 0x7fd6f504c700 (LWP 2013)):
#0  0x00007fd726c5a4b8 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fd72ae60ae6 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007fd72ae5c1e4 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007fd72ae5fcf8 in  () at /usr/lib/libQt5Core.so.5
#4  0x00007fd726c54454 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007fd72d9e47df in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7fd6f5c5d700 (LWP 2012)):
#0  0x00007fd726c5a10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fd729fd01f4 in  () at /usr/lib/libQt5Script.so.5
#2  0x00007fd729fd0239 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007fd726c54454 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fd72d9e47df in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7fd6f667f700 (LWP 2007)):
#0  0x00007fd726c5a4b8 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fd72ae60ae6 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007fd72ae5c1e4 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007fd72ae5fcf8 in  () at /usr/lib/libQt5Core.so.5
#4  0x00007fd726c54454 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007fd72d9e47df in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7fd70b5ef700 (LWP 2006)):
#0  0x00007fd726c5a4b8 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fd72ae60ae6 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007fd72ae5c1e4 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007fd72ae5fcf8 in  () at /usr/lib/libQt5Core.so.5
#4  0x00007fd726c54454 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007fd72d9e47df in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7fd70976e700 (LWP 1158)):
[KCrash Handler]
#6  0x00007fd72af6a908 in QLockFile::tryLock(int) () at /usr/lib/libQt5Core.so.5
#7  0x00007fd72cd72339 in  () at /usr/lib/libKF5ConfigCore.so.5
#8  0x00007fd72cd56310 in KConfig::sync() () at /usr/lib/libKF5ConfigCore.so.5
#9  0x00007fd710d11df5 in  () at /usr/lib/qt/plugins/org.kde.kwin.platforms/KWinX11Platform.so
#10 0x00007fd72b06643e in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#11 0x00007fd72b073148 in QTimer::timerEvent(QTimerEvent*) () at /usr/lib/libQt5Core.so.5
#12 0x00007fd72b066ee3 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#13 0x00007fd72bd1435c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#14 0x00007fd72bd1bad1 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#15 0x00007fd72b03a8e0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#16 0x00007fd72b08e25e in QTimerInfoList::activateTimers() () at /usr/lib/libQt5Core.so.5
#17 0x00007fd72b08c16a in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#18 0x00007fd72b038d3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#19 0x00007fd72ae5b063 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#20 0x00007fd72ae5fcf8 in  () at /usr/lib/libQt5Core.so.5
#21 0x00007fd726c54454 in start_thread () at /usr/lib/libpthread.so.0
#22 0x00007fd72d9e47df in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7fd70a76f700 (LWP 1014)):
#0  0x00007fd72d9db551 in ppoll () at /usr/lib/libc.so.6
#1  0x00007fd72b08a5f9 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007fd72b08befa in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007fd72b038d3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fd72ae5b063 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007fd7259aee75 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007fd72ae5fcf8 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007fd726c54454 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007fd72d9e47df in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7fd711bce700 (LWP 976)):
#0  0x00007fd72d9db551 in ppoll () at /usr/lib/libc.so.6
#1  0x00007fd72b08a5f9 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007fd72b08befa in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007fd72b038d3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fd72ae5b063 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007fd724b78de5 in  () at /usr/lib/libQt5DBus.so.5
#6  0x00007fd72ae5fcf8 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007fd726c54454 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007fd72d9e47df in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7fd71387e700 (LWP 975)):
#0  0x00007fd72d9db48d in poll () at /usr/lib/libc.so.6
#1  0x00007fd72cb1b8e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007fd72cb1d679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007fd71432a789 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007fd72ae5fcf8 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007fd726c54454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fd72d9e47df in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7fd72df7a840 (LWP 891)):
#0  0x00007fd726c5a10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fd72ae60bab in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007fd72ae5f89e in QThread::wait(unsigned long) () at /usr/lib/libQt5Core.so.5
#3  0x00007fd710d11a9e in KWin::X11StandalonePlatform::createOpenGLSafePoint(KWin::Platform::OpenGLSafePoint) () at /usr/lib/qt/plugins/org.kde.kwin.platforms/KWinX11Platform.so
#4  0x00007fd72d565b36 in KWin::Compositor::performCompositing() () at /usr/lib/libkwin.so.5
#5  0x00007fd72b066ee3 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#6  0x00007fd72bd1435c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#7  0x00007fd72bd1bad1 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#8  0x00007fd72b03a8e0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#9  0x00007fd72b08e25e in QTimerInfoList::activateTimers() () at /usr/lib/libQt5Core.so.5
#10 0x00007fd72b08c16a in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#11 0x00007fd7143a3ddd in  () at /usr/lib/libQt5XcbQpa.so.5
#12 0x00007fd72b038d3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#13 0x00007fd72b04123c in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#14 0x00007fd72dca3495 in kdemain () at /usr/lib/libkdeinit5_kwin_x11.so
#15 0x00007fd72d91c291 in __libc_start_main () at /usr/lib/libc.so.6
#16 0x000000000040069a in _start ()