Application: plasmashell (5.9.3)

Qt Version: 5.8.0
Frameworks Version: 5.31.0
Operating System: Linux 4.9.11-1-ARCH x86_64
Distribution: "Arch Linux"

-- Information about the crash:
I was looking at my empty desktop (layout: desktop with unlocked widgets) and I double clicked on the menu icon at the top left of the screen (with the three line).
The task bar disappeared and reloaded by itself with the notification of the crash.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fdc83ef1800 (LWP 5524))]

Thread 9 (Thread 0x7fdbb055f700 (LWP 10568)):
#0  0x00007fdc7d5a248d in poll () at /usr/lib/libc.so.6
#1  0x00007fdc783c07a6 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fdc783c08bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fdc7dec606b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fdc7de6f89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fdc7dc91a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fdc80dcb025 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007fdc7dc966d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fdc7cb61454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fdc7d5ab7df in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7fdbc977c700 (LWP 5747)):
#0  0x00007fdc7d5a248d in poll () at /usr/lib/libc.so.6
#1  0x00007fdc783c07a6 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fdc783c08bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fdc7dec606b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fdc7de6f89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fdc7dc91a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fdc8197efd6 in  () at /usr/lib/libQt5Quick.so.5
#7  0x00007fdc7dc966d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fdc7cb61454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fdc7d5ab7df in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7fdc53de9700 (LWP 5723)):
#0  0x00007fdc7cb6710f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fdc83673234 in  () at /usr/lib/libQt5Script.so.5
#2  0x00007fdc83673279 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007fdc7cb61454 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fdc7d5ab7df in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7fdc5daeb700 (LWP 5722)):
#0  0x00007fdc78405e49 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0
#1  0x00007fdc783bfc99 in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#2  0x00007fdc783c06cb in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007fdc783c08bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007fdc7dec606b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fdc7de6f89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007fdc7dc91a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007fdc7dc966d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fdc7cb61454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fdc7d5ab7df in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7fdc5f791700 (LWP 5721)):
#0  0x00007ffd84bf5939 in  ()
#1  0x00007ffd84bf5bc5 in clock_gettime ()
#2  0x00007fdc7d5b86b6 in clock_gettime () at /usr/lib/libc.so.6
#3  0x00007fdc7dec5201 in  () at /usr/lib/libQt5Core.so.5
#4  0x00007fdc7dec39c9 in QTimerInfoList::updateCurrentTime() () at /usr/lib/libQt5Core.so.5
#5  0x00007fdc7dec3f75 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/libQt5Core.so.5
#6  0x00007fdc7dec563e in  () at /usr/lib/libQt5Core.so.5
#7  0x00007fdc783bfc8d in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#8  0x00007fdc783c06cb in  () at /usr/lib/libglib-2.0.so.0
#9  0x00007fdc783c08bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#10 0x00007fdc7dec606b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#11 0x00007fdc7de6f89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#12 0x00007fdc7dc91a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#13 0x00007fdc80dcb025 in  () at /usr/lib/libQt5Qml.so.5
#14 0x00007fdc7dc966d8 in  () at /usr/lib/libQt5Core.so.5
#15 0x00007fdc7cb61454 in start_thread () at /usr/lib/libpthread.so.0
#16 0x00007fdc7d5ab7df in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7fdc659de700 (LWP 5600)):
#0  0x00007fdc78405e64 in g_mutex_unlock () at /usr/lib/libglib-2.0.so.0
#1  0x00007fdc783c079a in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fdc783c08bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fdc7dec606b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fdc7de6f89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fdc7dc91a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fdc80dcb025 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007fdc7dc966d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fdc7cb61454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fdc7d5ab7df in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7fdc67426700 (LWP 5592)):
#0  0x00007fdc7d5a248d in poll () at /usr/lib/libc.so.6
#1  0x00007fdc783c07a6 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fdc783c08bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fdc7dec606b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fdc7de6f89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fdc7dc91a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fdc7e2db125 in  () at /usr/lib/libQt5DBus.so.5
#7  0x00007fdc7dc966d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fdc7cb61454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fdc7d5ab7df in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7fdc6d17d700 (LWP 5539)):
#0  0x00007fdc7d5a248d in poll () at /usr/lib/libc.so.6
#1  0x00007fdc825998e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007fdc8259b679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007fdc6f0bc239 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007fdc7dc966d8 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007fdc7cb61454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fdc7d5ab7df in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7fdc83ef1800 (LWP 5524)):
[KCrash Handler]
#6  0x00007fdc81a29de1 in QQuickItemPrivate::setEffectiveVisibleRecur(bool) () at /usr/lib/libQt5Quick.so.5
#7  0x00007fdc81a29dea in QQuickItemPrivate::setEffectiveVisibleRecur(bool) () at /usr/lib/libQt5Quick.so.5
#8  0x00007fdc81a29f44 in QQuickItem::setVisible(bool) () at /usr/lib/libQt5Quick.so.5
#9  0x00007fdc839a708c in  () at /usr/lib/libKF5PlasmaQuick.so.5
#10 0x00007fdc839a88c6 in PlasmaQuick::Dialog::event(QEvent*) () at /usr/lib/libKF5PlasmaQuick.so.5
#11 0x00007fdc7eddf34c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#12 0x00007fdc7ede6b61 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#13 0x00007fdc7de71440 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#14 0x00007fdc7e65478e in QWindow::setVisible(bool) () at /usr/lib/libQt5Gui.so.5
#15 0x00007fdc839a497c in PlasmaQuick::Dialog::setVisible(bool) () at /usr/lib/libKF5PlasmaQuick.so.5
#16 0x00007fdc839a7818 in  () at /usr/lib/libKF5PlasmaQuick.so.5
#17 0x00007fdc839a907b in PlasmaQuick::Dialog::qt_metacall(QMetaObject::Call, int, void**) () at /usr/lib/libKF5PlasmaQuick.so.5
#18 0x00007fdc80d3eac9 in  () at /usr/lib/libQt5Qml.so.5
#19 0x00007fdc80d3d498 in QQmlPropertyPrivate::write(QObject*, QQmlPropertyData const&, QVariant const&, QQmlContextData*, QFlags<QQmlPropertyData::WriteFlag>) () at /usr/lib/libQt5Qml.so.5
#20 0x00007fdc80d07b7b in QV4::QObjectWrapper::setProperty(QV4::ExecutionEngine*, QObject*, QQmlPropertyData*, QV4::Value const&) () at /usr/lib/libQt5Qml.so.5
#21 0x00007fdc80d08390 in QV4::QObjectWrapper::setQmlProperty(QV4::ExecutionEngine*, QQmlContextData*, QObject*, QV4::String*, QV4::QObjectWrapper::RevisionMode, QV4::Value const&) () at /usr/lib/libQt5Qml.so.5
#22 0x00007fdc80d084a6 in QV4::QObjectWrapper::put(QV4::Managed*, QV4::String*, QV4::Value const&) () at /usr/lib/libQt5Qml.so.5
#23 0x00007fdc80d18f56 in QV4::Runtime::method_setProperty(QV4::ExecutionEngine*, QV4::Value const&, int, QV4::Value const&) () at /usr/lib/libQt5Qml.so.5
#24 0x00007fdc5c0c7f42 in  ()
#25 0x00000000008bb280 in  ()
#26 0x00007fdc5c0c8504 in  ()
#27 0x0000000000000000 in  ()

Reported using DrKonqi