Application: kwin_x11 (5.8.2)

Qt Version: 5.7.0
Frameworks Version: 5.27.0
Operating System: Linux 4.8.6-300.fc25.x86_64 x86_64
Distribution: "Fedora release 25 (Twenty Five)"

-- Information about the crash:
I am using KDE on Fedora 25, today, I was using virt-manager, it works fine, but when I try to add any more hardware to the exist virtual machine, after I click apply it reopen or rerun the app and all windows related to it.

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f37d5760940 (LWP 2543))]

Thread 6 (Thread 0x7f37accae700 (LWP 2573)):
#0  0x00007f37e8922460 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f37ee168bd4 in QTWTF::TCMalloc_PageHeap::scavengerThread() () from /lib64/libQt5Script.so.5
#2  0x00007f37ee168c19 in QTWTF::TCMalloc_PageHeap::runScavengerThread(void*) () from /lib64/libQt5Script.so.5
#3  0x00007f37e891c6ca in start_thread () from /lib64/libpthread.so.0
#4  0x00007f37e5afaf6f in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7f37b00a5700 (LWP 2570)):
#0  0x00007f37e68f25e3 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#1  0x00007f37e68a60ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#2  0x00007f37e6703643 in QThread::exec() () from /lib64/libQt5Core.so.5
#3  0x00007f37ed3c0735 in QQmlThreadPrivate::run() () from /lib64/libQt5Qml.so.5
#4  0x00007f37e6707a1a in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#5  0x00007f37e891c6ca in start_thread () from /lib64/libpthread.so.0
#6  0x00007f37e5afaf6f in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7f37c5fc4700 (LWP 2568)):
#0  0x00007f37e5b08f0f in __libc_enable_asynccancel () from /lib64/libc.so.6
#1  0x00007f37e5aef0b3 in ppoll () from /lib64/libc.so.6
#2  0x00007f37e68f1051 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () from /lib64/libQt5Core.so.5
#3  0x00007f37e68f2566 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#4  0x00007f37e68a60ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#5  0x00007f37e6703643 in QThread::exec() () from /lib64/libQt5Core.so.5
#6  0x00007f37ed3c0735 in QQmlThreadPrivate::run() () from /lib64/libQt5Qml.so.5
#7  0x00007f37e6707a1a in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#8  0x00007f37e891c6ca in start_thread () from /lib64/libpthread.so.0
#9  0x00007f37e5afaf6f in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f37c7fff700 (LWP 2566)):
#0  0x00007f37e5aef0d1 in ppoll () from /lib64/libc.so.6
#1  0x00007f37e68f1051 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () from /lib64/libQt5Core.so.5
#2  0x00007f37e68f2566 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#3  0x00007f37e68a60ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#4  0x00007f37e6703643 in QThread::exec() () from /lib64/libQt5Core.so.5
#5  0x00007f37e84187a9 in QDBusConnectionManager::run() () from /lib64/libQt5DBus.so.5
#6  0x00007f37e6707a1a in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#7  0x00007f37e891c6ca in start_thread () from /lib64/libpthread.so.0
#8  0x00007f37e5afaf6f in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f37cde1f700 (LWP 2565)):
#0  0x00007f37e5aef00d in poll () from /lib64/libc.so.6
#1  0x00007f37e81e6d10 in _xcb_conn_wait () from /lib64/libxcb.so.1
#2  0x00007f37e81e8aa9 in xcb_wait_for_event () from /lib64/libxcb.so.1
#3  0x00007f37ceacfa19 in QXcbEventReader::run() () from /lib64/libQt5XcbQpa.so.5
#4  0x00007f37e6707a1a in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#5  0x00007f37e891c6ca in start_thread () from /lib64/libpthread.so.0
#6  0x00007f37e5afaf6f in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f37d5760940 (LWP 2543)):
[KCrash Handler]
#6  0x0000000400000000 in ?? ()
#7  0x00007f37e68d4178 in QObject::connect(QObject const*, char const*, QObject const*, char const*, Qt::ConnectionType) () from /lib64/libQt5Core.so.5
#8  0x00007f37ee1ab5af in QScriptEnginePrivate::qobjectData(QObject*) () from /lib64/libQt5Script.so.5
#9  0x00007f37ee1ab674 in QScriptEnginePrivate::newQObject(QObject*, QScriptEngine::ValueOwnership, QFlags<QScriptEngine::QObjectWrapOption> const&) () from /lib64/libQt5Script.so.5
#10 0x00007f37ee1ab962 in QScriptEngine::newQObject(QObject*, QScriptEngine::ValueOwnership, QFlags<QScriptEngine::QObjectWrapOption> const&) () from /lib64/libQt5Script.so.5
#11 0x00007f37eeb7305c in KWin::effectWindowToScriptValue(QScriptEngine*, KWin::EffectWindow* const&) () from /lib64/libkwin.so.5
#12 0x00007f37ee1abc15 in QScriptEnginePrivate::create(QTJSC::ExecState*, int, void const*) () from /lib64/libQt5Script.so.5
#13 0x00007f37ee1d4956 in QScript::QObjectConnectionManager::execute(int, void**) () from /lib64/libQt5Script.so.5
#14 0x00007f37ee1dcc61 in QScript::QObjectConnectionManager::qt_metacall(QMetaObject::Call, int, void**) () from /lib64/libQt5Script.so.5
#15 0x00007f37e68ce16b in QMetaObject::activate(QObject*, int, int, void**) () from /lib64/libQt5Core.so.5
#16 0x00007f37ee794878 in KWin::EffectsHandler::desktopPresenceChanged(KWin::EffectWindow*, int, int) () from /lib64/libkwineffects.so.9
#17 0x00007f37ee795f49 in KWin::EffectsHandler::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /lib64/libkwineffects.so.9
#18 0x00007f37e68cf0d9 in QObject::event(QEvent*) () from /lib64/libQt5Core.so.5
#19 0x00007f37e70ef96c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#20 0x00007f37e70f7111 in QApplication::notify(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#21 0x00007f37e68a712a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib64/libQt5Core.so.5
#22 0x00007f37e68a9800 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /lib64/libQt5Core.so.5
#23 0x00007f37e68f23db in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#24 0x00007f37ceb487ed in QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5XcbQpa.so.5
#25 0x00007f37e68a60ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#26 0x00007f37e68adbac in QCoreApplication::exec() () from /lib64/libQt5Core.so.5
#27 0x00007f37eee860b6 in kdemain () from /lib64/libkdeinit5_kwin_x11.so
#28 0x00007f37e5a13401 in __libc_start_main () from /lib64/libc.so.6
#29 0x0000563967778cca in _start ()

Possible duplicates by query: bug 368248, bug 365367, bug 365003, bug 364826, bug 364643.

Reported using DrKonqi