Application: plasmashell (5.16.5)

Qt Version: 5.13.1
Frameworks Version: 5.61.0
Operating System: Linux 5.2.14-arch1-1-ARCH x86_64
Distribution: "Arch Linux"

-- Information about the crash:
- Unusual behavior I noticed:

Desktop doesn't appear at all, it just crash when Plasma Shell starts.
It seems related to calendar plugin but it worked before...

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 0x7f1bdc4c5880 (LWP 1436))]

Thread 10 (Thread 0x7f1bb09e4700 (LWP 2076)):
#0  0x00007f1be0c55667 in poll () at /usr/lib/libc.so.6
#1  0x00007f1bdf47a130 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f1bdf47a201 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f1be11f7a1c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f1be119e4ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f1be0fd0385 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f1be2d396eb in  () at /usr/lib/libQt5Quick.so.5
#7  0x00007f1be0fd15b0 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f1be049f57f in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f1be0c600e3 in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7f1bc1a6c700 (LWP 2055)):
#0  0x00007f1be0c55667 in poll () at /usr/lib/libc.so.6
#1  0x00007f1bdf47a130 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f1bdf47a201 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f1be11f7a1c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f1be119e4ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f1be0fd0385 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f1be0fd15b0 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f1be049f57f in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f1be0c600e3 in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7f1bc126b700 (LWP 1968)):
#0  0x00007f1be04a5415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f1be0fd7660 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/libQt5Core.so.5
#2  0x00007f1be0fd7752 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#3  0x00007f1be2dc4dad in  () at /usr/lib/libQt5Quick.so.5
#4  0x00007f1be2dc505e in  () at /usr/lib/libQt5Quick.so.5
#5  0x00007f1be0fd15b0 in  () at /usr/lib/libQt5Core.so.5
#6  0x00007f1be049f57f in start_thread () at /usr/lib/libpthread.so.0
#7  0x00007f1be0c600e3 in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7f1bc0a6a700 (LWP 1967)):
#0  0x00007f1be04a5415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f1be0fd7660 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/libQt5Core.so.5
#2  0x00007f1be0fd7752 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#3  0x00007f1be2dc4dad in  () at /usr/lib/libQt5Quick.so.5
#4  0x00007f1be2dc505e in  () at /usr/lib/libQt5Quick.so.5
#5  0x00007f1be0fd15b0 in  () at /usr/lib/libQt5Core.so.5
#6  0x00007f1be049f57f in start_thread () at /usr/lib/libpthread.so.0
#7  0x00007f1be0c600e3 in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7f1bc2636700 (LWP 1961)):
#0  0x00007f1be0c55667 in poll () at /usr/lib/libc.so.6
#1  0x00007f1bdf47a130 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f1bdf47a201 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f1be11f7a1c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f1be119e4ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f1be0fd0385 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f1be0fd15b0 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f1be049f57f in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f1be0c600e3 in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f1bcaec8700 (LWP 1940)):
#0  0x00007f1be04a5415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f1bcb173f5c in  () at /usr/lib/dri/i965_dri.so
#2  0x00007f1bcb173b58 in  () at /usr/lib/dri/i965_dri.so
#3  0x00007f1be049f57f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f1be0c600e3 in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f1bd96d1700 (LWP 1632)):
#0  0x00007f1be0c55667 in poll () at /usr/lib/libc.so.6
#1  0x00007f1bdf47a130 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f1bdf47a201 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f1be11f7a1c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f1be119e4ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f1be0fd0385 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f1be2a59849 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f1be0fd15b0 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f1be049f57f in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f1be0c600e3 in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f1bda903700 (LWP 1562)):
#0  0x00007f1bdf42a479 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0
#1  0x00007f1bdf47a115 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f1bdf47a201 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f1be11f7a1c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f1be119e4ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f1be0fd0385 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f1be1a73b37 in  () at /usr/lib/libQt5DBus.so.5
#7  0x00007f1be0fd15b0 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f1be049f57f in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f1be0c600e3 in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f1bdb6f0700 (LWP 1473)):
#0  0x00007f1be0c55667 in poll () at /usr/lib/libc.so.6
#1  0x00007f1be31ca630 in  () at /usr/lib/libxcb.so.1
#2  0x00007f1be31cc2db in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f1bdc05d101 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f1be0fd15b0 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f1be049f57f in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f1be0c600e3 in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f1bdc4c5880 (LWP 1436)):
[KCrash Handler]
#6  0x0000000000000020 in  ()
#7  0x00007f1bb3ee1af5 in  () at /usr/lib/qt/qml/org/kde/plasma/calendar/libcalendarplugin.so
#8  0x00007f1bb3edc546 in  () at /usr/lib/qt/qml/org/kde/plasma/calendar/libcalendarplugin.so
#9  0x00007f1be11cc44a in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#10 0x00007f1be1ce14f5 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#11 0x00007f1be1ceae11 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#12 0x00007f1be119f9c2 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#13 0x00007f1be11a2739 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#14 0x00007f1be11f8404 in  () at /usr/lib/libQt5Core.so.5
#15 0x00007f1bdf4783ae in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#16 0x00007f1bdf47a1c1 in  () at /usr/lib/libglib-2.0.so.0
#17 0x00007f1bdf47a201 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#18 0x00007f1be11f7a03 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#19 0x00007f1be119e4ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#20 0x00007f1be11a6326 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#21 0x000055c747b41df6 in  ()
#22 0x00007f1be0b8aee3 in __libc_start_main () at /usr/lib/libc.so.6
#23 0x000055c747b422ae in _start ()
[Inferior 1 (process 1436) detached]

Reported using DrKonqi