Application: plasmashell (5.8.5)

Qt Version: 5.7.1
Frameworks Version: 5.29.0
Operating System: Linux 4.9.6-200.fc25.x86_64 x86_64
Distribution: "Fedora release 25 (Twenty Five)"

-- Information about the crash:
- What I was doing when the application crashed:
setting show/hide config for items in sys-tray settings

- Unusual behavior I noticed:
lots of plasma lockups and crashes on my system

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f582d8d0940 (LWP 2775))]

Thread 8 (Thread 0x7f57715cf700 (LWP 5635)):
#0  0x00007f58344d67f9 in g_mutex_lock () at /lib64/libglib-2.0.so.0
#1  0x00007f58344901c4 in g_main_context_release () at /lib64/libglib-2.0.so.0
#2  0x00007f583449110a in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007f583449126c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f583c4f073b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f583c4a173a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f583c2fe5f3 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f583f56f4e5 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#8  0x00007f583c3029da in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x00007f583aa3f6ca in start_thread () at /lib64/libpthread.so.0
#10 0x00007f583b6f5f7f in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7f5774670700 (LWP 4004)):
#0  0x00007f583b6e5bed in read () at /lib64/libc.so.6
#1  0x00007f58344d5450 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007f5834490c60 in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007f58344910f4 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007f583449126c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007f583c4f073b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f583c4a173a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#7  0x00007f583c2fe5f3 in QThread::exec() () at /lib64/libQt5Core.so.5
#8  0x00007f5775f402c7 in KCupsConnection::run() () at /lib64/libkcupslib.so
#9  0x00007f583c3029da in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#10 0x00007f583aa3f6ca in start_thread () at /lib64/libpthread.so.0
#11 0x00007f583b6f5f7f in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f580ffff700 (LWP 3883)):
#0  0x00007f583aa45460 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f5841daa2f4 in QTWTF::TCMalloc_PageHeap::scavengerThread() () at /lib64/libQt5Script.so.5
#2  0x00007f5841daa339 in  () at /lib64/libQt5Script.so.5
#3  0x00007f583aa3f6ca in start_thread () at /lib64/libpthread.so.0
#4  0x00007f583b6f5f7f in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f581a9b6700 (LWP 3744)):
#0  0x00007f583b6ea01d in poll () at /lib64/libc.so.6
#1  0x00007f5834491156 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f583449126c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f583c4f073b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f583c4a173a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f583c2fe5f3 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f583f56f4e5 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f583c3029da in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f583aa3f6ca in start_thread () at /lib64/libpthread.so.0
#9  0x00007f583b6f5f7f in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f581bfff700 (LWP 3009)):
#0  0x00007f583448e1e7 in g_source_iter_next () at /lib64/libglib-2.0.so.0
#1  0x00007f5834490ac4 in g_main_context_check () at /lib64/libglib-2.0.so.0
#2  0x00007f58344910f4 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007f583449126c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f583c4f073b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f583c4a173a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f583c2fe5f3 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f583f56f4e5 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#8  0x00007f583c3029da in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x00007f583aa3f6ca in start_thread () at /lib64/libpthread.so.0
#10 0x00007f583b6f5f7f in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f5821e02700 (LWP 2911)):
#0  0x00007f583b6ea01d in poll () at /lib64/libc.so.6
#1  0x00007f5834491156 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f583449126c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f583c4f073b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f583c4a173a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f583c2fe5f3 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f583cb9e739 in QDBusConnectionManager::run() () at /lib64/libQt5DBus.so.5
#7  0x00007f583c3029da in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f583aa3f6ca in start_thread () at /lib64/libpthread.so.0
#9  0x00007f583b6f5f7f in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f58233f1700 (LWP 2899)):
#0  0x00007f583b6ea01d in poll () at /lib64/libc.so.6
#1  0x00007f58406b5d10 in _xcb_conn_wait () at /lib64/libxcb.so.1
#2  0x00007f58406b7aa9 in xcb_wait_for_event () at /lib64/libxcb.so.1
#3  0x00007f5826c46d69 in QXcbEventReader::run() () at /lib64/libQt5XcbQpa.so.5
#4  0x00007f583c3029da in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#5  0x00007f583aa3f6ca in start_thread () at /lib64/libpthread.so.0
#6  0x00007f583b6f5f7f in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f582d8d0940 (LWP 2775)):
[KCrash Handler]
#6  0x00007f583c4ab49b in QMetaObject::cast(QObject const*) const () at /lib64/libQt5Core.so.5
#7  0x00007f581810956f in QQuickMenu1::menuBar() () at /usr/lib64/qt5/qml/QtQuick/Controls/libqtquickcontrolsplugin.so
#8  0x00007f581810e1c1 in QQuickMenuPopupWindow1::shouldForwardEventAfterDismiss(QMouseEvent*) const () at /usr/lib64/qt5/qml/QtQuick/Controls/libqtquickcontrolsplugin.so
#9  0x00007f581810ed10 in QQuickPopupWindow1::forwardEventToTransientParent(QMouseEvent*) () at /usr/lib64/qt5/qml/QtQuick/Controls/libqtquickcontrolsplugin.so
#10 0x00007f581810ef7d in QQuickPopupWindow1::mousePressEvent(QMouseEvent*) () at /usr/lib64/qt5/qml/QtQuick/Controls/libqtquickcontrolsplugin.so
#11 0x00007f583c7e48a5 in QWindow::event(QEvent*) () at /lib64/libQt5Gui.so.5
#12 0x00007f583ff9d615 in QQuickWindow::event(QEvent*) () at /lib64/libQt5Quick.so.5
#13 0x00007f581810f3e1 in QQuickPopupWindow1::event(QEvent*) () at /usr/lib64/qt5/qml/QtQuick/Controls/libqtquickcontrolsplugin.so
#14 0x00007f583cd6eecc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#15 0x00007f583cd76671 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#16 0x00007f583c4a27aa in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#17 0x00007f583c7d92b3 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () at /lib64/libQt5Gui.so.5
#18 0x00007f583c7dad85 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /lib64/libQt5Gui.so.5
#19 0x00007f583c7bbc4b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Gui.so.5
#20 0x00007f5826c7d750 in userEventSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5XcbQpa.so.5
#21 0x00007f5834490e42 in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#22 0x00007f58344911c0 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#23 0x00007f583449126c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#24 0x00007f583c4f071f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#25 0x00007f583c4a173a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#26 0x00007f583c4a923c in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#27 0x0000556e5acca452 in main ()

Reported using DrKonqi