Application: plasmashell (5.9.4)

Qt Version: 5.8.0
Frameworks Version: 5.32.0
Operating System: Linux 4.10.9-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
- What I was doing when the application crashed:
First, I added a defauit panel
Then, I removed this panel without any change, and Plasma crashed

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7ffa81051800 (LWP 751))]

Thread 9 (Thread 0x7ff9a2edd700 (LWP 936)):
#0  0x00007ffa7a6fa67d in poll () at /usr/lib/libc.so.6
#1  0x00007ffa754e07a6 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffa754e08bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007ffa7b02106b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007ffa7afca89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007ffa7adeca73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007ffa7df24025 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007ffa7adf16d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007ffa79ca62e7 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007ffa7a70454f in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7ff9b7bc3700 (LWP 904)):
#0  0x00007ffa754dffbd in g_main_context_query () at /usr/lib/libglib-2.0.so.0
#1  0x00007ffa754e0718 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffa754e08bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007ffa7b02106b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007ffa7afca89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007ffa7adeca73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007ff9ba5610a7 in KCupsConnection::run() () at /usr/lib/libkcupslib.so
#7  0x00007ffa7adf16d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007ffa79ca62e7 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007ffa7a70454f in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7ff9cbc1a700 (LWP 899)):
#0  0x00007ffa7a6fa67d in poll () at /usr/lib/libc.so.6
#1  0x00007ffa754e07a6 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffa754e08bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007ffa7b02106b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007ffa7afca89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007ffa7adeca73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007ffa7ead7fd6 in  () at /usr/lib/libQt5Quick.so.5
#7  0x00007ffa7adf16d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007ffa79ca62e7 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007ffa7a70454f in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7ffa575a5700 (LWP 898)):
#0  0x00007ffa79cac756 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007ffa807cb234 in  () at /usr/lib/libQt5Script.so.5
#2  0x00007ffa807cb279 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007ffa79ca62e7 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007ffa7a70454f in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7ffa61561700 (LWP 897)):
#0  0x00007ffa7b0206a3 in  () at /usr/lib/libQt5Core.so.5
#1  0x00007ffa754e01a9 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffa754e0744 in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007ffa754e08bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007ffa7b02106b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007ffa7afca89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007ffa7adeca73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007ffa7df24025 in  () at /usr/lib/libQt5Qml.so.5
#8  0x00007ffa7adf16d8 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007ffa79ca62e7 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007ffa7a70454f in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7ffa635ef700 (LWP 878)):
#0  0x00007ffa7a6fa67d in poll () at /usr/lib/libc.so.6
#1  0x00007ffa754e07a6 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffa754e08bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007ffa7b02106b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007ffa7afca89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007ffa7adeca73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007ffa7df24025 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007ffa7adf16d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007ffa79ca62e7 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007ffa7a70454f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7ffa6904a700 (LWP 779)):
#0  0x00007ffa7a6f637d in read () at /usr/lib/libc.so.6
#1  0x00007ffa75524aa0 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffa754e026e in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007ffa754e0744 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007ffa754e08bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007ffa7b02106b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007ffa7afca89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007ffa7adeca73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007ffa7bb71125 in  () at /usr/lib/libQt5DBus.so.5
#9  0x00007ffa7adf16d8 in  () at /usr/lib/libQt5Core.so.5
#10 0x00007ffa79ca62e7 in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007ffa7a70454f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7ffa6b0c6700 (LWP 777)):
#0  0x00007ffa7a6fa67d in poll () at /usr/lib/libc.so.6
#1  0x00007ffa7f6f18e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007ffa7f6f3679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007ffa6d638239 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007ffa7adf16d8 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007ffa79ca62e7 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffa7a70454f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7ffa81051800 (LWP 751)):
[KCrash Handler]
#6  0x00007ff9b674e4f7 in  () at /usr/lib/qt/plugins/plasma/applets/plasma_applet_notifications.so
#7  0x00007ffa7aff80be in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#8  0x00007ffa7aff80be in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#9  0x00007ffa7aff870f in QObject::destroyed(QObject*) () at /usr/lib/libQt5Core.so.5
#10 0x00007ffa7afff815 in QObject::~QObject() () at /usr/lib/libQt5Core.so.5
#11 0x00007ffa7f242ea9 in Plasma::Containment::~Containment() () at /usr/lib/libKF5Plasma.so.5
#12 0x00007ffa7aff8be0 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#13 0x00007ffa7bf3a34c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#14 0x00007ffa7bf41b61 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#15 0x00007ffa7afcc440 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#16 0x00007ffa7afcebcd in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#17 0x00007ffa7b020c43 in  () at /usr/lib/libQt5Core.so.5
#18 0x00007ffa754e05a7 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#19 0x00007ffa754e0810 in  () at /usr/lib/libglib-2.0.so.0
#20 0x00007ffa754e08bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#21 0x00007ffa7b02104f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#22 0x00007ffa7afca89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#23 0x00007ffa7afd2de4 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#24 0x000000000041ca42 in  ()
#25 0x00007ffa7a638511 in __libc_start_main () at /usr/lib/libc.so.6
#26 0x000000000041cdca in _start ()

Reported using DrKonqi