Application: plasmashell (5.12.4)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.15.0-15-generic x86_64
Distribution: Ubuntu Bionic Beaver (development branch)

-- Information about the crash:
- What I was doing when the application crashed:

After changing the settings for what is shown in the notification area, it crashes.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f7190d19800 (LWP 2260))]

Thread 9 (Thread 0x7f70b0f6d700 (LWP 6803)):
#0  0x00007f718a2f00b4 in __GI___libc_read (fd=36, buf=0x7f70b0f6ccd0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f7184ea2960 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7184e5df27 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7184e5e3e0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7184e5e7d2 in g_main_loop_run () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f70cf66de76 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007f7184e85e05 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f7189b876db in start_thread (arg=0x7f70b0f6d700) at pthread_create.c:463
#8  0x00007f718a30188f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f70b1caf700 (LWP 6802)):
#0  0x00007f718a2f4bf9 in __GI___poll (fds=0x55862254d220, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f7184e5e439 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7184e5e54c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7184e5e591 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7184e85e05 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f7189b876db in start_thread (arg=0x7f70b1caf700) at pthread_create.c:463
#6  0x00007f718a30188f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f70d80ec700 (LWP 6741)):
#0  0x00007f7184ea3cd9 in g_mutex_lock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f7184e5d9a3 in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7184e5e36b in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7184e5e54c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f718ac4290b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f718abe79ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f718aa0622a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f70c5fe1747 in KCupsConnection::run() () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#8  0x00007f718aa0b16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f7189b876db in start_thread (arg=0x7f70d80ec700) at pthread_create.c:463
#10 0x00007f718a30188f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f71667c0700 (LWP 2383)):
#0  0x00007f7189b8d9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f71906e8fb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f7189b8d9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f71906e8f68, cond=0x7f71906e8f90) at pthread_cond_wait.c:502
#2  0x00007f7189b8d9f3 in __pthread_cond_wait (cond=0x7f71906e8f90, mutex=0x7f71906e8f68) at pthread_cond_wait.c:655
#3  0x00007f71903f25f4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007f71903f2639 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007f7189b876db in start_thread (arg=0x7f71667c0700) at pthread_create.c:463
#6  0x00007f718a30188f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f7167fff700 (LWP 2382)):
#0  0x00007f718a2f4bf9 in __GI___poll (fds=0x7f715c003ce0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f7184e5e439 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7184e5e54c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f718ac4290b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f718abe79ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f718aa0622a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f718db786f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f718aa0b16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f7189b876db in start_thread (arg=0x7f7167fff700) at pthread_create.c:463
#9  0x00007f718a30188f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f716e7b1700 (LWP 2291)):
#0  0x00007f7184e5d8dc in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f7184e5e36b in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7184e5e54c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f718ac4290b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f718abe79ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f718aa0622a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f718db786f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f718aa0b16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f7189b876db in start_thread (arg=0x7f716e7b1700) at pthread_create.c:463
#9  0x00007f718a30188f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f7170209700 (LWP 2281)):
#0  0x00007f718a2f4bf9 in __GI___poll (fds=0x7f7168006420, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f7184e5e439 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7184e5e54c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f718ac4290b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f718abe79ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f718aa0622a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f718b0bfd45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f718aa0b16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f7189b876db in start_thread (arg=0x7f7170209700) at pthread_create.c:463
#9  0x00007f718a30188f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f717aa85700 (LWP 2272)):
#0  0x00007f718a2f4bf9 in __GI___poll (fds=0x7f717aa84ca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f718f31e747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f718f32036a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f717d41e2a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f718aa0b16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f7189b876db in start_thread (arg=0x7f717aa85700) at pthread_create.c:463
#6  0x00007f718a30188f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f7190d19800 (LWP 2260)):
[KCrash Handler]
#6  0x00007f718daa7a65 in QV4::QObjectWrapper::getProperty(QV4::ExecutionEngine*, QObject*, int, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f718dabee53 in QV4::Runtime::method_getQmlQObjectProperty(QV4::ExecutionEngine*, QV4::Value const&, int, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f70c717e21b in  ()
#9  0x00007f718b0a90f0 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0xe708bfc0615f0900 in  ()
#11 0x000055861c8885e0 in  ()
#12 0x00007ffc00b7e4b0 in  ()
#13 0x00007f70cdc6a2f0 in TaskManager::XWindowTasksModel::data(QModelIndex const&, int) const () at /usr/lib/x86_64-linux-gnu/libtaskmanager.so.6
#14 0x00007ffc00b7e720 in  ()
#15 0x00007ffc00b7e3b0 in  ()
#16 0x00007f71670003c0 in  ()
#17 0x00007ffc00b7e5f0 in  ()
#18 0x000055861c647330 in  ()
#19 0x000055861e81dc00 in  ()
#20 0x00007f718da2f8cc in QV4::ExecutionContext::simpleCall(QV4::Scope&, QV4::CallData*, QV4::Function*) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#21 0x00007f718db58a29 in QQmlJavaScriptExpression::evaluate(QV4::CallData*, bool*, QV4::Scope&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#22 0x00007f718db62ce6 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#23 0x00007f718db5fb23 in QQmlBinding::update(QFlags<QQmlPropertyData::WriteFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#24 0x00007f718db35573 in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#25 0x00007f718dad2f99 in QQmlData::signalEmitted(QAbstractDeclarativeData*, QObject*, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#26 0x00007f718ac17def in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007f718e7cd858 in QQuickItem::geometryChanged(QRectF const&, QRectF const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#28 0x00007f718e7c77fb in QQuickItem::setX(double) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#29 0x00007f718e7d71a4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#30 0x00007f718db6276e in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#31 0x00007f718db62d7e in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#32 0x00007f718db5fb23 in QQmlBinding::update(QFlags<QQmlPropertyData::WriteFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#33 0x00007f718db35573 in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#34 0x00007f718dad2f99 in QQmlData::signalEmitted(QAbstractDeclarativeData*, QObject*, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#35 0x00007f718ac17def in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#36 0x00007f718e7c05f2 in QQuickItem::childrenRectChanged(QRectF const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#37 0x00007f718e7c4353 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#38 0x00007f718e7cd7fd in QQuickItem::geometryChanged(QRectF const&, QRectF const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#39 0x00007f718e7c7a18 in QQuickItem::setPosition(QPointF const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#40 0x00007f718e8d5798 in QQuickBasePositioner::positionItem(double, double, QQuickBasePositioner::PositionedItem*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#41 0x00007f718e8d990e in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#42 0x00007f718e8d7a0a in QQuickBasePositioner::prePositioning() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#43 0x00007f718e7e3693 in QQuickWindowPrivate::polishItems() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#44 0x00007f718e775e2f in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#45 0x00007f718e7eb5c6 in QQuickWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#46 0x000055861bac986b in  ()
#47 0x00007f718bbf182c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#48 0x00007f718bbf90f4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#49 0x00007f718abe99a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#50 0x00007f718b441141 in QWindowPrivate::deliverUpdateRequest() () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#51 0x00007f718b441659 in QWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#52 0x00007f718e7eb565 in QQuickWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#53 0x000055861bac986b in  ()
#54 0x00007f718bbf182c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#55 0x00007f718bbf90f4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#56 0x00007f718abe99a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#57 0x00007f718ac41d8e in QTimerInfoList::activateTimers() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#58 0x00007f718ac42551 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#59 0x00007f7184e5e287 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#60 0x00007f7184e5e4c0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#61 0x00007f7184e5e54c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#62 0x00007f718ac428ef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#63 0x00007f718abe79ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#64 0x00007f718abf0a84 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#65 0x000055861babacfa in  ()
#66 0x00007f718a201b97 in __libc_start_main (main=0x55861baba320, argc=1, argv=0x7ffc00b82ff8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc00b82fe8) at ../csu/libc-start.c:310
#67 0x000055861babb09a in _start ()

Reported using DrKonqi