Application: plasmashell (5.9.2)

Qt Version: 5.8.0
Frameworks Version: 5.31.0
Operating System: Linux 4.9.9-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
After performing an upgrade on my ArchLinux x86_64 machine I did a reboot, a couple of seconds after login back Plasma crashed - I wasn't doing anything on the machine at that moment just waiting for everything to start up.

The crash does not seem to be reproducible.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fd324b99800 (LWP 950))]

Thread 8 (Thread 0x7fd269050700 (LWP 1064)):
#0  0x00007fd3190c9e64 in g_mutex_unlock () at /usr/lib/libglib-2.0.so.0
#1  0x00007fd31908464d in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fd3190848bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fd31eb8a06b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fd31eb3389a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fd31e955a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fd322642fd6 in  () at /usr/lib/libQt5Quick.so.5
#7  0x00007fd31e95a6d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fd31d825454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fd31e26f7df in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7fd2fcdce700 (LWP 1061)):
#0  0x00007fd31d82b10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fd324337234 in  () at /usr/lib/libQt5Script.so.5
#2  0x00007fd324337279 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007fd31d825454 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fd31e26f7df in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7fd2febeb700 (LWP 1060)):
#0  0x00007fd31e2624ed in read () at /usr/lib/libc.so.6
#1  0x00007fd3190c8aa0 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fd31908426e in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007fd319084744 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007fd3190848bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007fd31eb8a06b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007fd31eb3389a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007fd31e955a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007fd31e95a6d8 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007fd31d825454 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007fd31e26f7df in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7fd2fffff700 (LWP 1056)):
#0  0x00007fd3190c9e45 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0
#1  0x00007fd3190837b4 in g_main_context_release () at /usr/lib/libglib-2.0.so.0
#2  0x00007fd31908475a in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007fd3190848bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007fd31eb8a06b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fd31eb3389a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007fd31e955a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007fd321a8f025 in  () at /usr/lib/libQt5Qml.so.5
#8  0x00007fd31e95a6d8 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007fd31d825454 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007fd31e26f7df in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7fd3067c0700 (LWP 1018)):
#0  0x00007fd31e2624ed in read () at /usr/lib/libc.so.6
#1  0x00007fd3190c8aa0 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fd31908426e in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007fd319084744 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007fd3190848bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007fd31eb8a06b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007fd31eb3389a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007fd31e955a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007fd321a8f025 in  () at /usr/lib/libQt5Qml.so.5
#9  0x00007fd31e95a6d8 in  () at /usr/lib/libQt5Core.so.5
#10 0x00007fd31d825454 in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007fd31e26f7df in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7fd307fff700 (LWP 974)):
#0  0x00007fd31e26648d in poll () at /usr/lib/libc.so.6
#1  0x00007fd3190847a6 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fd3190848bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fd31eb8a06b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fd31eb3389a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fd31e955a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fd31ef9f125 in  () at /usr/lib/libQt5DBus.so.5
#7  0x00007fd31e95a6d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fd31d825454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fd31e26f7df in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7fd30de8b700 (LWP 961)):
#0  0x00007fd31e26648d in poll () at /usr/lib/libc.so.6
#1  0x00007fd32325d8e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007fd32325f679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007fd30fdca239 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007fd31e95a6d8 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007fd31d825454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fd31e26f7df in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7fd324b99800 (LWP 950)):
[KCrash Handler]
#6  0x00007fd3226edde1 in QQuickItemPrivate::setEffectiveVisibleRecur(bool) () at /usr/lib/libQt5Quick.so.5
#7  0x00007fd3226eddea in QQuickItemPrivate::setEffectiveVisibleRecur(bool) () at /usr/lib/libQt5Quick.so.5
#8  0x00007fd3226edf44 in QQuickItem::setVisible(bool) () at /usr/lib/libQt5Quick.so.5
#9  0x00007fd32466b08c in  () at /usr/lib/libKF5PlasmaQuick.so.5
#10 0x00007fd32466c8c6 in PlasmaQuick::Dialog::event(QEvent*) () at /usr/lib/libKF5PlasmaQuick.so.5
#11 0x00007fd31faa334c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#12 0x00007fd31faaab61 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#13 0x00007fd31eb35440 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#14 0x00007fd31f31878e in QWindow::setVisible(bool) () at /usr/lib/libQt5Gui.so.5
#15 0x00007fd32466897c in PlasmaQuick::Dialog::setVisible(bool) () at /usr/lib/libKF5PlasmaQuick.so.5
#16 0x00007fd32466b818 in  () at /usr/lib/libKF5PlasmaQuick.so.5
#17 0x00007fd32466d07b in PlasmaQuick::Dialog::qt_metacall(QMetaObject::Call, int, void**) () at /usr/lib/libKF5PlasmaQuick.so.5
#18 0x00007fd321a02ac9 in  () at /usr/lib/libQt5Qml.so.5
#19 0x00007fd321a01498 in QQmlPropertyPrivate::write(QObject*, QQmlPropertyData const&, QVariant const&, QQmlContextData*, QFlags<QQmlPropertyData::WriteFlag>) () at /usr/lib/libQt5Qml.so.5
#20 0x00007fd3219cbb7b in QV4::QObjectWrapper::setProperty(QV4::ExecutionEngine*, QObject*, QQmlPropertyData*, QV4::Value const&) () at /usr/lib/libQt5Qml.so.5
#21 0x00007fd3219cc390 in QV4::QObjectWrapper::setQmlProperty(QV4::ExecutionEngine*, QQmlContextData*, QObject*, QV4::String*, QV4::QObjectWrapper::RevisionMode, QV4::Value const&) () at /usr/lib/libQt5Qml.so.5
#22 0x00007fd3219cc4a6 in QV4::QObjectWrapper::put(QV4::Managed*, QV4::String*, QV4::Value const&) () at /usr/lib/libQt5Qml.so.5
#23 0x00007fd3219dcf56 in QV4::Runtime::method_setProperty(QV4::ExecutionEngine*, QV4::Value const&, int, QV4::Value const&) () at /usr/lib/libQt5Qml.so.5
#24 0x00007fd269be0f42 in  ()
#25 0x0000000000000018 in  ()
#26 0x00007fd269be1504 in  ()
#27 0x00007fff7ec18c00 in  ()
#28 0x0003400000000001 in  ()
#29 0x00007fd2ff000368 in  ()
#30 0x0003400000000000 in  ()
#31 0x00007fff7ec18a40 in  ()
#32 0x0000000000000000 in  ()

Reported using DrKonqi