Application: kwin_x11 (5.10.5)

Qt Version: 5.7.1
Frameworks Version: 5.36.0
Operating System: Linux 4.12.13-300.fc26.i686 i686
Distribution (Platform): Fedora RPMs

-- Information about the crash:
I was rebooting the laptop when I got THREE error messages saying the kernal had crashed.  Then,  I got the Kwin crashed message,  and was  vectored here.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0xb1122840 (LWP 1170))]

Thread 4 (Thread 0xacbe6b40 (LWP 1373)):
[KCrash Handler]
#7  0xb4bd16b3 in QLockFilePrivate::tryLock_sys() () from /lib/libQt5Core.so.5
#8  0xb4b705e2 in QLockFile::tryLock(int) () from /lib/libQt5Core.so.5
#9  0xb4b708a4 in QLockFile::lock() () from /lib/libQt5Core.so.5
#10 0xb5c3f3dd in KConfigIniBackend::lock() () from /lib/libKF5ConfigCore.so.5
#11 0xb5c2573f in KConfig::sync() () from /lib/libKF5ConfigCore.so.5
#12 0xaf7da0f5 in QtPrivate::QFunctorSlotObject<KWin::X11StandalonePlatform::createOpenGLSafePoint(KWin::Platform::OpenGLSafePoint)::{lambda()#1}, 0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) () from /usr/lib/qt5/plugins/org.kde.kwin.platforms/KWinX11Platform.so
#13 0xb4c72613 in QMetaObject::activate(QObject*, int, int, void**) () from /lib/libQt5Core.so.5
#14 0xb4c72b8b in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /lib/libQt5Core.so.5
#15 0xb4cf6d11 in QTimer::timeout(QTimer::QPrivateSignal) () from /lib/libQt5Core.so.5
#16 0xb4c8065b in QTimer::timerEvent(QTimerEvent*) () from /lib/libQt5Core.so.5
#17 0xb4c73438 in QObject::event(QEvent*) () from /lib/libQt5Core.so.5
#18 0xb545c984 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/libQt5Widgets.so.5
#19 0xb5464f67 in QApplication::notify(QObject*, QEvent*) () from /lib/libQt5Widgets.so.5
#20 0xb77806aa in KWin::ApplicationX11::notify(QObject*, QEvent*) () from /lib/libkdeinit5_kwin_x11.so
#21 0xb4c44dac in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/libQt5Core.so.5
#22 0xb4ca05b1 in QTimerInfoList::activateTimers() () from /lib/libQt5Core.so.5
#23 0xb4c9d23e in QEventDispatcherUNIXPrivate::activateTimers() () from /lib/libQt5Core.so.5
#24 0xb4c9e55c in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQt5Core.so.5
#25 0xb4c43880 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQt5Core.so.5
#26 0xb4a71b08 in QThread::exec() () from /lib/libQt5Core.so.5
#27 0xb4a71c5b in QThread::run() () from /lib/libQt5Core.so.5
#28 0xb4a76eaa in QThreadPrivate::start(void*) () from /lib/libQt5Core.so.5
#29 0xb5cf62d9 in start_thread () from /lib/libpthread.so.0
#30 0xb4734a96 in clone () from /lib/libc.so.6

Thread 3 (Thread 0xadc8bb40 (LWP 1339)):
#0  0xb77b0cd9 in __kernel_vsyscall ()
#1  0xb47294d4 in ppoll () from /lib/libc.so.6
#2  0xb4c9cc56 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () from /lib/libQt5Core.so.5
#3  0xb4c9e3e5 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQt5Core.so.5
#4  0xb4c43880 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQt5Core.so.5
#5  0xb4a71b08 in QThread::exec() () from /lib/libQt5Core.so.5
#6  0xb6a1a606 in QQmlThreadPrivate::run() () from /lib/sse2/libQt5Qml.so.5
#7  0xb4a76eaa in QThreadPrivate::start(void*) () from /lib/libQt5Core.so.5
#8  0xb5cf62d9 in start_thread () from /lib/libpthread.so.0
#9  0xb4734a96 in clone () from /lib/libc.so.6

Thread 2 (Thread 0xb111fb40 (LWP 1202)):
#0  0xb77b0cd9 in __kernel_vsyscall ()
#1  0xb472940f in poll () from /lib/libc.so.6
#2  0xb1cb791b in g_poll () from /lib/libglib-2.0.so.0
#3  0xb1ca734e in g_main_context_iterate.isra () from /lib/libglib-2.0.so.0
#4  0xb1ca74ab in g_main_context_iteration () from /lib/libglib-2.0.so.0
#5  0xb4ca12af in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQt5Core.so.5
#6  0xb4c43880 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQt5Core.so.5
#7  0xb4a71b08 in QThread::exec() () from /lib/libQt5Core.so.5
#8  0xb60aa3d0 in QDBusConnectionManager::run() () from /lib/libQt5DBus.so.5
#9  0xb4a76eaa in QThreadPrivate::start(void*) () from /lib/libQt5Core.so.5
#10 0xb5cf62d9 in start_thread () from /lib/libpthread.so.0
#11 0xb4734a96 in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb1122840 (LWP 1170)):
#0  0xb77b0cd9 in __kernel_vsyscall ()
#1  0xb5cfc9dd in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb4a77768 in QWaitCondition::wait(QMutex*, unsigned long) () from /lib/libQt5Core.so.5
#3  0xb4a7026a in QSemaphore::acquire(int) () from /lib/libQt5Core.so.5
#4  0xb4c72363 in QMetaObject::activate(QObject*, int, int, void**) () from /lib/libQt5Core.so.5
#5  0xb4c72b8b in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /lib/libQt5Core.so.5
#6  0xb4c72c55 in QObject::destroyed(QObject*) () from /lib/libQt5Core.so.5
#7  0xb4c7a3cb in QObject::~QObject() () from /lib/libQt5Core.so.5
#8  0xb60c6c16 in QDBusAbstractInterface::~QDBusAbstractInterface() () from /lib/libQt5DBus.so.5
#9  0xb62c6caa in OrgKdeKglobalaccelComponentInterface::~OrgKdeKglobalaccelComponentInterface() () from /lib/libKF5GlobalAccel.so.5
#10 0xb4c79762 in QObjectPrivate::deleteChildren() () from /lib/libQt5Core.so.5
#11 0xb4c7a7f4 in QObject::~QObject() () from /lib/libQt5Core.so.5
#12 0xb62b337a in KGlobalAccel::~KGlobalAccel() () from /lib/libKF5GlobalAccel.so.5
#13 0xb62b346b in (anonymous namespace)::Q_QGS_s_instance::innerFunction()::Holder::~Holder() () from /lib/libKF5GlobalAccel.so.5
#14 0xb4673a43 in __run_exit_handlers () from /lib/libc.so.6
#15 0xb4673aa1 in exit () from /lib/libc.so.6
#16 0xb0501e34 in QXcbConnection::processXcbEvents() () from /lib/libQt5XcbQpa.so.5
#17 0xb053bbae in QXcbConnection::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) [clone .part.2] () from /lib/libQt5XcbQpa.so.5
#18 0xb4c6ffa9 in QMetaCallEvent::placeMetaCall(QObject*) () from /lib/libQt5Core.so.5
#19 0xb4c735bb in QObject::event(QEvent*) () from /lib/libQt5Core.so.5
#20 0xb05049f8 in QXcbConnection::event(QEvent*) () from /lib/libQt5XcbQpa.so.5
#21 0xb545c984 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/libQt5Widgets.so.5
#22 0xb5464f67 in QApplication::notify(QObject*, QEvent*) () from /lib/libQt5Widgets.so.5
#23 0xb77806aa in KWin::ApplicationX11::notify(QObject*, QEvent*) () from /lib/libkdeinit5_kwin_x11.so
#24 0xb4c44dac in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/libQt5Core.so.5
#25 0xb4c4748f in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /lib/libQt5Core.so.5
#26 0xb4c9e250 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQt5Core.so.5
#27 0xb058d6ca in QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQt5XcbQpa.so.5
#28 0xb4c43880 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQt5Core.so.5
#29 0xb4c4c61d in QCoreApplication::exec() () from /lib/libQt5Core.so.5
#30 0xb4f53644 in QGuiApplication::exec() () from /lib/libQt5Gui.so.5
#31 0xb545c8c4 in QApplication::exec() () from /lib/libQt5Widgets.so.5
#32 0xb778169e in kdemain () from /lib/libkdeinit5_kwin_x11.so
#33 0x004bcaa7 in main ()

Possible duplicates by query: bug 378631, bug 374755, bug 372114.

Reported using DrKonqi