Application: plasmashell (5.8.6)
 (Compiled from sources)
Qt Version: 5.7.1
Frameworks Version: 5.32.0
Operating System: Linux 4.9.14-200.fc25.x86_64 x86_64
Distribution: "Fedora release 25 (Twenty Five)"

-- Information about the crash:
- What I was doing when the application crashed:i tried toadd simple menu widget to the palne when the crash happen 

- Unusual behavior I noticead:

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f80f721c3c0 (LWP 3802))]

Thread 8 (Thread 0x7f803a9b1700 (LWP 3848)):
#0  0x00007f80fcc22fe2 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#1  0x00007f80fcc2327c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#2  0x00007f8104ec56eb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#3  0x00007f8104e7668a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f8104cd35e3 in QThread::exec() () at /lib64/libQt5Core.so.5
#5  0x00007f803c26f2c7 in KCupsConnection::run() () at /lib64/libkcupslib.so
#6  0x00007f8104cd79ca in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#7  0x00007f81034136ca in start_thread () at /lib64/libpthread.so.0
#8  0x00007f81040caf7f in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7f804c80d700 (LWP 3814)):
#0  0x00007f81040bf01d in poll () at /lib64/libc.so.6
#1  0x00007f80fcc23166 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f80fcc2327c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f8104ec56eb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f8104e7668a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f8104cd35e3 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f81088d68b6 in QQuickPixmapReader::run() () at /lib64/libQt5Quick.so.5
#7  0x00007f8104cd79ca in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f81034136ca in start_thread () at /lib64/libpthread.so.0
#9  0x00007f81040caf7f in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f80de5a8700 (LWP 3807)):
#0  0x00007f8103419460 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f810a9972f4 in QTWTF::TCMalloc_PageHeap::scavengerThread() () at /lib64/libQt5Script.so.5
#2  0x00007f810a997339 in  () at /lib64/libQt5Script.so.5
#3  0x00007f81034136ca in start_thread () at /lib64/libpthread.so.0
#4  0x00007f81040caf7f in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f80dffff700 (LWP 3806)):
#0  0x00007f80fcc22bb5 in g_main_context_check () at /lib64/libglib-2.0.so.0
#1  0x00007f80fcc23104 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f80fcc2327c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f8104ec56eb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f8104e7668a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f8104cd35e3 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f8107f4b4e5 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f8104cd79ca in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f81034136ca in start_thread () at /lib64/libpthread.so.0
#9  0x00007f81040caf7f in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f80e5c09700 (LWP 3805)):
#0  0x00007f80fcc68879 in g_mutex_lock () at /lib64/libglib-2.0.so.0
#1  0x00007f80fcc23122 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f80fcc2327c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f8104ec56eb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f8104e7668a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f8104cd35e3 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f8107f4b4e5 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f8104cd79ca in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f81034136ca in start_thread () at /lib64/libpthread.so.0
#9  0x00007f81040caf7f in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f80e764e700 (LWP 3804)):
#0  0x00007f81040bf01d in poll () at /lib64/libc.so.6
#1  0x00007f80fcc23166 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f80fcc2327c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f8104ec56eb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f8104e7668a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f8104cd35e3 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f8105573739 in QDBusConnectionManager::run() () at /lib64/libQt5DBus.so.5
#7  0x00007f8104cd79ca in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f81034136ca in start_thread () at /lib64/libpthread.so.0
#9  0x00007f81040caf7f in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f80ed023700 (LWP 3803)):
#0  0x00007f81040bf01d in poll () at /lib64/libc.so.6
#1  0x00007f81092a2d10 in _xcb_conn_wait () at /lib64/libxcb.so.1
#2  0x00007f81092a4aa9 in xcb_wait_for_event () at /lib64/libxcb.so.1
#3  0x00007f80f0658d69 in QXcbEventReader::run() () at /lib64/libQt5XcbQpa.so.5
#4  0x00007f8104cd79ca in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#5  0x00007f81034136ca in start_thread () at /lib64/libpthread.so.0
#6  0x00007f81040caf7f in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f80f721c3c0 (LWP 3802)):
[KCrash Handler]
#6  0x00007f803d329427 in NotificationsApplet::onScreenChanges() () at /usr/lib64/qt5/plugins/plasma/applets/plasma_applet_notifications.so
#7  0x00007f8104e9ea56 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#8  0x000055ee2e1e6997 in ShellCorona::panelContainmentDestroyed(QObject*) ()
#9  0x00007f8104e9ea56 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#10 0x00007f8104e9f06f in QObject::destroyed(QObject*) () at /lib64/libQt5Core.so.5
#11 0x00007f8104ea5d5a in QObject::~QObject() () at /lib64/libQt5Core.so.5
#12 0x00007f8108e05f69 in Plasma::Containment::~Containment() () at /lib64/libKF5Plasma.so.5
#13 0x00007f8104e9f820 in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#14 0x00007f8105743ecc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#15 0x00007f810574b671 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#16 0x00007f8104e776fa in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#17 0x00007f8104e79de0 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib64/libQt5Core.so.5
#18 0x00007f8104ec5653 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5Core.so.5
#19 0x00007f80fcc22e52 in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#20 0x00007f80fcc231d0 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#21 0x00007f80fcc2327c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#22 0x00007f8104ec56cf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#23 0x00007f8104e7668a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#24 0x00007f8104e7e18c in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#25 0x000055ee2e1c7752 in main ()

Reported using DrKonqi