SUMMARY
On arch linux  with korganizer version 5.10, crashes on startup.

STEPS TO REPRODUCE
1. Open Korganizer 5.10 in arch linux


OBSERVED RESULT
Crash on opening


SOFTWARE/OS VERSIONS

Operating System: Arch Linux 
KDE Plasma Version: 5.14.4
Qt Version: 5.12.0
KDE Frameworks Version: 5.53.0
Kernel Version: 4.20.0-arch1-1-ARCH


ADDITIONAL INFORMATION

-- Backtrace --



Application: KOrganizer (korganizer), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fe5cb370840 (LWP 2511))]

Thread 5 (Thread 0x7fe5c2dee700 (LWP 2516)):
#0  0x00007fe5d3a1cc21 in poll () from /usr/lib/libc.so.6
#1  0x00007fe5d102f540 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007fe5d102f62e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007fe5d3f695c4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007fe5d3f1258c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007fe5d3d565c9 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007fe5d3d579cc in ?? () from /usr/lib/libQt5Core.so.5
#7  0x00007fe5d1c28a9d in start_thread () from /usr/lib/libpthread.so.0
#8  0x00007fe5d3a27b23 in clone () from /usr/lib/libc.so.6

Thread 4 (Thread 0x7fe5c35ef700 (LWP 2514)):
#0  0x00007fe5d0fdd424 in g_mutex_unlock () from /usr/lib/libglib-2.0.so.0
#1  0x00007fe5d102f639 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#2  0x00007fe5d3f695c4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#3  0x00007fe5d3f1258c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007fe5d3d565c9 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#5  0x00007fe5d3d579cc in ?? () from /usr/lib/libQt5Core.so.5
#6  0x00007fe5d1c28a9d in start_thread () from /usr/lib/libpthread.so.0
#7  0x00007fe5d3a27b23 in clone () from /usr/lib/libc.so.6

Thread 3 (Thread 0x7fe5c893e700 (LWP 2513)):
#0  0x00007fe5d3a1cc21 in poll () from /usr/lib/libc.so.6
#1  0x00007fe5d102f540 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007fe5d102f62e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007fe5d3f695c4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007fe5d3f1258c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007fe5d3d565c9 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007fe5d3690ba6 in ?? () from /usr/lib/libQt5DBus.so.5
#7  0x00007fe5d3d579cc in ?? () from /usr/lib/libQt5Core.so.5
#8  0x00007fe5d1c28a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007fe5d3a27b23 in clone () from /usr/lib/libc.so.6

Thread 2 (Thread 0x7fe5c9f60700 (LWP 2512)):
#0  0x00007fe5d3a1cc21 in poll () from /usr/lib/libc.so.6
#1  0x00007fe5d0fa4630 in ?? () from /usr/lib/libxcb.so.1
#2  0x00007fe5d0fa62db in xcb_wait_for_event () from /usr/lib/libxcb.so.1
#3  0x00007fe5caf3496b in ?? () from /usr/lib/libQt5XcbQpa.so.5
#4  0x00007fe5d3d579cc in ?? () from /usr/lib/libQt5Core.so.5
#5  0x00007fe5d1c28a9d in start_thread () from /usr/lib/libpthread.so.0
#6  0x00007fe5d3a27b23 in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7fe5cb370840 (LWP 2511)):
[KCrash Handler]
#6  0x00007fe5d3dfacba in ?? () from /usr/lib/libQt5Core.so.5
#7  0x00007fe5d3df45d9 in ?? () from /usr/lib/libQt5Core.so.5
#8  0x00007fe5d3d9d0ef in ?? () from /usr/lib/libQt5Core.so.5
#9  0x00007fe5d3d9d56d in ?? () from /usr/lib/libQt5Core.so.5
#10 0x00007fe5d3d9db04 in QDateTime::QDateTime(QDate const&, QTime const&, QTimeZone const&) () from /usr/lib/libQt5Core.so.5
#11 0x00007fe5d51375d0 in KCalCore::MemoryCalendar::rawEvents(QDate const&, QDate const&, QTimeZone const&, bool) const () from /usr/lib/libKF5CalendarCore.so.5
#12 0x00007fe5d50ea259 in KCalCore::Calendar::events(QDate const&, QDate const&, QTimeZone const&, bool) const () from /usr/lib/libKF5CalendarCore.so.5
#13 0x00007fe5d5488dde in ?? () from /usr/lib/libkorganizerprivate.so.5
#14 0x00007fe5d548a608 in ?? () from /usr/lib/libkorganizerprivate.so.5
#15 0x00007fe5d5484265 in ?? () from /usr/lib/libkorganizerprivate.so.5
#16 0x00007fe5d547e010 in ?? () from /usr/lib/libkorganizerprivate.so.5
#17 0x00007fe5d5472260 in CalendarView::CalendarView(QWidget*) () from /usr/lib/libkorganizerprivate.so.5
#18 0x000055cddd3da7fc in ?? ()
#19 0x000055cddd3dbc7d in ?? ()
#20 0x000055cddd3dc84f in ?? ()
#21 0x00007fe5d552c605 in KontactInterface::PimUniqueApplication::start(QStringList const&, bool) () from /usr/lib/libKF5KontactInterface.so.5
#22 0x000055cddd3d9838 in ?? ()
#23 0x00007fe5d3950223 in __libc_start_main () from /usr/lib/libc.so.6
#24 0x000055cddd3d9a4e in _start ()
[Inferior 1 (process 2511) detached]