Application: kwin_x11 (5.9.4)

Qt Version: 5.7.1
Frameworks Version: 5.33.0
Operating System: Linux 4.10.12-200.fc25.x86_64 x86_64
Distribution: "Fedora release 25 (Twenty Five)"

-- Information about the crash:
- What I was doing when the application crashed:
VirtaulBox was updated via the update service (Apper). This always means I have to update the installed extension. After installation of the Extension package (in VirtualBox) KWin crashed (and restarted itself).

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 0x7f2a1b12e940 (LWP 4329))]

Thread 8 (Thread 0x7f29f021e700 (LWP 25098)):
#0  0x00007f2a2a7450e1 in ppoll () at /lib64/libc.so.6
#1  0x00007f2a2b549971 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /lib64/libQt5Core.so.5
#2  0x00007f2a2b54ae86 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#3  0x00007f2a2b4fe68a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f2a2b35b5e3 in QThread::exec() () at /lib64/libQt5Core.so.5
#5  0x00007f2a2b35f9ca in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#6  0x00007f2a2d2e56ca in start_thread () at /lib64/libpthread.so.0
#7  0x00007f2a2a750f7f in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7f29fb24b700 (LWP 5460)):
#0  0x00007f2a2a7450e1 in ppoll () at /lib64/libc.so.6
#1  0x00007f2a2b549971 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /lib64/libQt5Core.so.5
#2  0x00007f2a2b54ae86 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#3  0x00007f2a2b4fe68a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f2a2b35b5e3 in QThread::exec() () at /lib64/libQt5Core.so.5
#5  0x00007f2a31e594e5 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#6  0x00007f2a2b35f9ca in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#7  0x00007f2a2d2e56ca in start_thread () at /lib64/libpthread.so.0
#8  0x00007f2a2a750f7f in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f29efa1d700 (LWP 5134)):
#0  0x00007f2a2d2eb460 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f2a32c042f4 in QTWTF::TCMalloc_PageHeap::scavengerThread() () at /lib64/libQt5Script.so.5
#2  0x00007f2a32c04339 in  () at /lib64/libQt5Script.so.5
#3  0x00007f2a2d2e56ca in start_thread () at /lib64/libpthread.so.0
#4  0x00007f2a2a750f7f in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f29f0c24700 (LWP 5084)):
#0  0x00007f2a2d2eb460 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f29f8cc2c5b in util_queue_thread_func () at /usr/lib64/dri/r600_dri.so
#2  0x00007f29f8cc2ab7 in impl_thrd_routine () at /usr/lib64/dri/r600_dri.so
#3  0x00007f2a2d2e56ca in start_thread () at /lib64/libpthread.so.0
#4  0x00007f2a2a750f7f in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f2a03fff700 (LWP 5007)):
#0  0x00007f2a2a7450e1 in ppoll () at /lib64/libc.so.6
#1  0x00007f2a2b549971 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /lib64/libQt5Core.so.5
#2  0x00007f2a2b54ae86 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#3  0x00007f2a2b4fe68a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f2a2b35b5e3 in QThread::exec() () at /lib64/libQt5Core.so.5
#5  0x00007f2a31e594e5 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#6  0x00007f2a2b35f9ca in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#7  0x00007f2a2d2e56ca in start_thread () at /lib64/libpthread.so.0
#8  0x00007f2a2a750f7f in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f2a11f9c700 (LWP 4615)):
#0  0x00007f2a2a7450e1 in ppoll () at /lib64/libc.so.6
#1  0x00007f2a2b549971 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /lib64/libQt5Core.so.5
#2  0x00007f2a2b54ae86 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#3  0x00007f2a2b4fe68a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f2a2b35b5e3 in QThread::exec() () at /lib64/libQt5Core.so.5
#5  0x00007f2a2fa89739 in QDBusConnectionManager::run() () at /lib64/libQt5DBus.so.5
#6  0x00007f2a2b35f9ca in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#7  0x00007f2a2d2e56ca in start_thread () at /lib64/libpthread.so.0
#8  0x00007f2a2a750f7f in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f2a13685700 (LWP 4465)):
#0  0x00007f2a2a74501d in poll () at /lib64/libc.so.6
#1  0x00007f2a2cc4ad10 in _xcb_conn_wait () at /lib64/libxcb.so.1
#2  0x00007f2a2cc4caa9 in xcb_wait_for_event () at /lib64/libxcb.so.1
#3  0x00007f2a1455fd69 in QXcbEventReader::run() () at /lib64/libQt5XcbQpa.so.5
#4  0x00007f2a2b35f9ca in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#5  0x00007f2a2d2e56ca in start_thread () at /lib64/libpthread.so.0
#6  0x00007f2a2a750f7f in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f2a1b12e940 (LWP 4329)):
[KCrash Handler]
#6  0x00000000000000c0 in  ()
#7  0x00007f2a2b52c878 in QObject::connect(QObject const*, char const*, QObject const*, char const*, Qt::ConnectionType) () at /lib64/libQt5Core.so.5
#8  0x00007f2a32c46d2f in QScriptEnginePrivate::qobjectData(QObject*) () at /lib64/libQt5Script.so.5
#9  0x00007f2a32c46df4 in QScriptEnginePrivate::newQObject(QObject*, QScriptEngine::ValueOwnership, QFlags<QScriptEngine::QObjectWrapOption> const&) () at /lib64/libQt5Script.so.5
#10 0x00007f2a32c470e2 in QScriptEngine::newQObject(QObject*, QScriptEngine::ValueOwnership, QFlags<QScriptEngine::QObjectWrapOption> const&) () at /lib64/libQt5Script.so.5
#11 0x00007f2a33629f2c in KWin::effectWindowToScriptValue(QScriptEngine*, KWin::EffectWindow* const&) () at /lib64/libkwin.so.5
#12 0x00007f2a32c47395 in QScriptEnginePrivate::create(QTJSC::ExecState*, int, void const*) () at /lib64/libQt5Script.so.5
#13 0x00007f2a32c700d6 in QScript::QObjectConnectionManager::execute(int, void**) () at /lib64/libQt5Script.so.5
#14 0x00007f2a32c783e1 in QScript::QObjectConnectionManager::qt_metacall(QMetaObject::Call, int, void**) () at /lib64/libQt5Script.so.5
#15 0x00007f2a2b52689b in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#16 0x00007f2a332387d8 in KWin::EffectsHandler::desktopPresenceChanged(KWin::EffectWindow*, int, int) () at /lib64/libkwineffects.so.10
#17 0x00007f2a3323a1a1 in KWin::EffectsHandler::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () at /lib64/libkwineffects.so.10
#18 0x00007f2a2b5277e9 in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#19 0x00007f2a2bd3fecc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#20 0x00007f2a2bd47671 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#21 0x00007f2a2b4ff6fa in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#22 0x00007f2a2b501de0 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib64/libQt5Core.so.5
#23 0x00007f2a2b54acfb in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#24 0x00007f2a145d970d in QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5XcbQpa.so.5
#25 0x00007f2a2b4fe68a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#26 0x00007f2a2b50618c in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#27 0x00007f2a33950002 in kdemain () at /lib64/libkdeinit5_kwin_x11.so
#28 0x00007f2a2a669401 in __libc_start_main () at /lib64/libc.so.6
#29 0x000055f473274cca in _start ()

Reported using DrKonqi