Application: kontact (5.7.3)

Qt Version: 5.9.5
Frameworks Version: 5.46.0
Operating System: Linux 4.15.0-23-generic x86_64
Distribution: Ubuntu 18.04 LTS

-- Information about the crash:
- What I was doing when the application crashed:
starting kontact

when starting from command line, i get something like

kf5.kxmlgui: cannot find .rc file "kontactsummary_part.rc" for component "kontact"
No such XML file "/home/me/.local/share/kontact/default-.rc"
parse error from icalcomponent_new_from_string. string= "87015_r0"
Failed to parse incidence! Item id =  43916 Storage collection id  221 parentCollectionId =  221
"87015_r0"
org.kde.pim.akonadicore: Unable to deserialize payload part: "RFC822" in item 43916 collection 221
org.kde.pim.akonadicore: Payload data was:  "87015_r0"
ASSERT: "uint(i) < uint(size())" in file /usr/include/x86_64-linux-gnu/qt5/QtCore/qstring.h, line 887
*** KMail got signal 6 (Exiting)
*** Dead letters dumped.
KCrash: crashing... crashRecursionCounter = 2
KCrash: Application Name = kontact path = /usr/bin pid = 11917
KCrash: Arguments: /usr/bin/kontact 
KCrash: Attempting to start /usr/lib/x86_64-linux-gnu/libexec/drkonqi from kdeinit
sock_file=/run/user/1004/kdeinit5__0
QSocketNotifier: Invalid socket 9 and type 'Read', disabling...
QSocketNotifier: Invalid socket 67 and type 'Read', disabling...
QSocketNotifier: Invalid socket 10 and type 'Read', disabling...

and after a short while >1000 lines  saying
[warn] epoll_wait: Ungültiger Dateideskriptor

the last words meaning "invalid file descriptor"

The crash can be reproduced every time.

-- Backtrace:
Application: Kontact (kontact), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f8d0ba91b80 (LWP 10963))]

Thread 29 (Thread 0x7f8bb69be700 (LWP 11011)):
#0  0x00007f8d08436bf9 in __GI___poll (fds=0x7f8ba8004a10, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8d02140439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8d0214054c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8d08f9c90b in QEventDispatcherGlib::processEvents (this=0x7f8ba8000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f8d08f419ea in QEventLoop::exec (this=this@entry=0x7f8bb69bda20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f8d08d6022a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#6  0x00007f8d08d6516d in QThreadPrivate::start (arg=0x556f2cc02bf0) at thread/qthread_unix.cpp:368
#7  0x00007f8d041c06db in start_thread (arg=0x7f8bb69be700) at pthread_create.c:463
#8  0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 28 (Thread 0x7f8bb71bf700 (LWP 11008)):
#0  0x00007f8d08436bf9 in __GI___poll (fds=0x7f8bb0003ce0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8d02140439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8d0214054c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8d08f9c90b in QEventDispatcherGlib::processEvents (this=0x7f8bb0000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f8d08f419ea in QEventLoop::exec (this=this@entry=0x7f8bb71bea20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f8d08d6022a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#6  0x00007f8d08d6516d in QThreadPrivate::start (arg=0x556f2cbb22d0) at thread/qthread_unix.cpp:368
#7  0x00007f8d041c06db in start_thread (arg=0x7f8bb71bf700) at pthread_create.c:463
#8  0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 27 (Thread 0x7f8bbef0b700 (LWP 10999)):
#0  0x00007f8d02185cd9 in g_mutex_lock () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f8d021403fe in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8d0214054c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8d08f9c90b in QEventDispatcherGlib::processEvents (this=0x7f8bb8000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f8d08f419ea in QEventLoop::exec (this=this@entry=0x7f8bbef0aa20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f8d08d6022a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#6  0x00007f8d08d6516d in QThreadPrivate::start (arg=0x556f2c8c79e0) at thread/qthread_unix.cpp:368
#7  0x00007f8d041c06db in start_thread (arg=0x7f8bbef0b700) at pthread_create.c:463
#8  0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 26 (Thread 0x7f8bcbfff700 (LWP 10996)):
#0  0x00007f8d02185cd9 in g_mutex_lock () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f8d0213f9a3 in g_main_context_prepare () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8d0214036b in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8d0214054c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8d08f9c90b in QEventDispatcherGlib::processEvents (this=0x7f8bc0000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f8d08f419ea in QEventLoop::exec (this=this@entry=0x7f8bcbffea20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f8d08d6022a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#7  0x00007f8d08d6516d in QThreadPrivate::start (arg=0x556f2c7664b0) at thread/qthread_unix.cpp:368
#8  0x00007f8d041c06db in start_thread (arg=0x7f8bcbfff700) at pthread_create.c:463
#9  0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7f8bd0cac700 (LWP 10995)):
#0  0x00007f8d08436bf9 in __GI___poll (fds=0x7f8bc4003ce0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8d02140439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8d0214054c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8d08f9c90b in QEventDispatcherGlib::processEvents (this=0x7f8bc4000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f8d08f419ea in QEventLoop::exec (this=this@entry=0x7f8bd0caba20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f8d08d6022a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#6  0x00007f8d08d6516d in QThreadPrivate::start (arg=0x556f2c72fbd0) at thread/qthread_unix.cpp:368
#7  0x00007f8d041c06db in start_thread (arg=0x7f8bd0cac700) at pthread_create.c:463
#8  0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7f8bd1b4b700 (LWP 10994)):
#0  0x00007f8d02185cf4 in g_mutex_unlock () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f8d0213fdc8 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8d021403e0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8d0214054c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8d08f9c90b in QEventDispatcherGlib::processEvents (this=0x7f8bcc000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f8d08f419ea in QEventLoop::exec (this=this@entry=0x7f8bd1b4aa20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f8d08d6022a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#7  0x00007f8d08d6516d in QThreadPrivate::start (arg=0x556f2c756f20) at thread/qthread_unix.cpp:368
#8  0x00007f8d041c06db in start_thread (arg=0x7f8bd1b4b700) at pthread_create.c:463
#9  0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7f8c7affd700 (LWP 10993)):
#0  0x00007f8d041c69f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f8cf2fd9fb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f8cf2fd9f68, cond=0x7f8cf2fd9f90) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f8cf2fd9f90, mutex=0x7f8cf2fd9f68) at pthread_cond_wait.c:655
#3  0x00007f8cf2ce35f4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007f8cf2ce3639 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007f8d041c06db in start_thread (arg=0x7f8c7affd700) at pthread_create.c:463
#6  0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7f8c7b7fe700 (LWP 10990)):
#0  0x00007f8d041c69f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x556f2c4952cc) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x556f2c495278, cond=0x556f2c4952a0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x556f2c4952a0, mutex=0x556f2c495278) at pthread_cond_wait.c:655
#3  0x00007f8cf91bcc95 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f8cf91bd177 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f8cf91bdf11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f8cf91ba5eb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f8d041c06db in start_thread (arg=0x7f8c7b7fe700) at pthread_create.c:463
#8  0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7f8c7bfff700 (LWP 10989)):
#0  __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f8d08454474 in ___fprintf_chk (fp=0x7f8d0870f8b0 <_IO_stdfile_2_lock>, flag=1, format=0x7f8cf18e76a8 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f8cf18cf9ad in event_logv_ () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f8cf18cfb44 in event_warn () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f8cf18d146c in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f8cf18c7114 in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f8cf918dab9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f8cf9189da8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f8cf91a677b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f8cf91be4d6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f8cf91ba5eb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f8d041c06db in start_thread (arg=0x7f8c7bfff700) at pthread_create.c:463
#12 0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7f8c94ff9700 (LWP 10988)):
#0  0x00007f8cd96ea664 in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#1  0x00007f8cd96eaa49 in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#2  0x00007f8cd96eb2cf in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#3  0x00007f8cd9b500d8 in pa_mainloop_dispatch () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f8cd9b504ae in pa_mainloop_iterate () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f8cd9b50530 in pa_mainloop_run () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f8cd9b5e399 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#7  0x00007f8cd96fb2a8 in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#8  0x00007f8d041c06db in start_thread (arg=0x7f8c94ff9700) at pthread_create.c:463
#9  0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7f8c957fa700 (LWP 10987)):
#0  0x00007f8d041c6ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f8c957f95d0, expected=0, futex_word=0x7f8c957f9758) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7f8c957f9670, mutex=0x7f8c957f9708, cond=0x7f8c957f9730) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7f8c957f9730, mutex=0x7f8c957f9708, abstime=0x7f8c957f9670) at pthread_cond_wait.c:667
#3  0x00007f8cf91eb652 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f8cf91b291e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f8cf918d52b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f8cf9189da8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f8cf91a677b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f8cf91be4d6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f8cf91ba5eb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f8d041c06db in start_thread (arg=0x7f8c957fa700) at pthread_create.c:463
#11 0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7f8c95ffb700 (LWP 10986)):
#0  0x00007f8d041c6ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f8c95ffa5d0, expected=0, futex_word=0x7f8c95ffa758) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7f8c95ffa670, mutex=0x7f8c95ffa708, cond=0x7f8c95ffa730) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7f8c95ffa730, mutex=0x7f8c95ffa708, abstime=0x7f8c95ffa670) at pthread_cond_wait.c:667
#3  0x00007f8cf91eb652 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f8cf91b291e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f8cf918d52b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f8cf9189da8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f8cf91a677b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f8cf91be4d6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f8cf91ba5eb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f8d041c06db in start_thread (arg=0x7f8c95ffb700) at pthread_create.c:463
#11 0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f8c967fc700 (LWP 10985)):
#0  0x00007f8d041c69f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x556f2c4a39e8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x556f2c4a3928, cond=0x556f2c4a39c0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x556f2c4a39c0, mutex=0x556f2c4a3928) at pthread_cond_wait.c:655
#3  0x00007f8cf9944060 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f8cf91bdf11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f8cf91ba5eb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f8d041c06db in start_thread (arg=0x7f8c967fc700) at pthread_create.c:463
#7  0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f8c96ffd700 (LWP 10984)):
#0  0x00007f8d041c69f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x556f2c4952cc) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x556f2c495278, cond=0x556f2c4952a0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x556f2c4952a0, mutex=0x556f2c495278) at pthread_cond_wait.c:655
#3  0x00007f8cf91bcc95 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f8cf91bd177 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f8cf91bdf11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f8cf91ba5eb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f8d041c06db in start_thread (arg=0x7f8c96ffd700) at pthread_create.c:463
#8  0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f8c977fe700 (LWP 10983)):
#0  0x00007f8d041c69f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f8c977fd738) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f8c977fd6e8, cond=0x7f8c977fd710) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f8c977fd710, mutex=0x7f8c977fd6e8) at pthread_cond_wait.c:655
#3  0x00007f8cf91b2999 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f8cf91b29c7 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f8cf918d4db in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f8cf9189da8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f8cf91a677b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f8cf91be4d6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f8cf91ba5eb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f8d041c06db in start_thread (arg=0x7f8c977fe700) at pthread_create.c:463
#11 0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f8c97fff700 (LWP 10982)):
#0  __lll_unlock_wake_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:341
#1  0x00007f8d0845450c in _IO_acquire_lock_clear_flags2_fct (p=<synthetic pointer>) at ../libio/libioP.h:807
#2  ___fprintf_chk (fp=0x7f8d0870e680 <_IO_2_1_stderr_>, flag=1, format=<optimized out>) at fprintf_chk.c:30
#3  0x00007f8cf18cf9ad in event_logv_ () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f8cf18cfb44 in event_warn () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f8cf18d146c in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f8cf18c7114 in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#7  0x00007f8cf918dab9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f8cf9189da8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f8cf91a677b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f8cf8a44978 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f8cf8a44f2b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f8cf91be588 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f8cf91ba5eb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007f8d041c06db in start_thread (arg=0x7f8c97fff700) at pthread_create.c:463
#15 0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f8cb8ff9700 (LWP 10981)):
#0  0x00007f8d041c69f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f8cb8ff8358) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f8cb8ff8308, cond=0x7f8cb8ff8330) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f8cb8ff8330, mutex=0x7f8cb8ff8308) at pthread_cond_wait.c:655
#3  0x00007f8cf91b2999 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f8cf91b29c7 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f8cf918d4db in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f8cf9189da8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f8cf91a677b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f8cf8a448c8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f8cf8a44f1b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f8cf91be588 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f8cf91ba5eb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f8d041c06db in start_thread (arg=0x7f8cb8ff9700) at pthread_create.c:463
#13 0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f8cb97fa700 (LWP 10980)):
#0  0x00007f8d041c69f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f8cb97f9358) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f8cb97f9308, cond=0x7f8cb97f9330) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f8cb97f9330, mutex=0x7f8cb97f9308) at pthread_cond_wait.c:655
#3  0x00007f8cf91b2999 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f8cf91b29c7 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f8cf918d4db in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f8cf9189da8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f8cf91a677b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f8cf8a44818 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f8cf8a44f0b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f8cf91be588 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f8cf91ba5eb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f8d041c06db in start_thread (arg=0x7f8cb97fa700) at pthread_create.c:463
#13 0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f8cb9ffb700 (LWP 10979)):
#0  0x00007f8d041c69f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f8cb9ffa358) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f8cb9ffa308, cond=0x7f8cb9ffa330) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f8cb9ffa330, mutex=0x7f8cb9ffa308) at pthread_cond_wait.c:655
#3  0x00007f8cf91b2999 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f8cf91b29c7 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f8cf918d4db in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f8cf9189da8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f8cf91a677b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f8cf8a44768 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f8cf8a44efb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f8cf91be588 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f8cf91ba5eb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f8d041c06db in start_thread (arg=0x7f8cb9ffb700) at pthread_create.c:463
#13 0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f8cba7fc700 (LWP 10978)):
#0  0x00007f8d08432187 in __GI___libc_write (fd=2, buf=0x7f8cba7f86e0, nbytes=47) at ../sysdeps/unix/sysv/linux/write.c:27
#1  0x00007f8d083ad1bd in _IO_new_file_write (f=0x7f8d0870e680 <_IO_2_1_stderr_>, data=0x7f8cba7f86e0, n=47) at fileops.c:1203
#2  0x00007f8d083adb2f in new_do_write (to_do=<optimized out>, data=0x7f8cba7f86e0 "[warn] epoll_wait: Ung\303\274ltiger Dateideskriptor\n", fp=0x7f8d0870e680 <_IO_2_1_stderr_>) at fileops.c:457
#3  _IO_new_file_xsputn (f=0x7f8d0870e680 <_IO_2_1_stderr_>, data=<optimized out>, n=47) at fileops.c:1277
#4  0x00007f8d08380707 in buffered_vfprintf (s=s@entry=0x7f8d0870e680 <_IO_2_1_stderr_>, format=format@entry=0x7f8cf18e76a8 "[%s] %s\n", args=args@entry=0x7f8cba7faca0) at vfprintf.c:2350
#5  0x00007f8d0837d726 in _IO_vfprintf_internal (s=s@entry=0x7f8d0870e680 <_IO_2_1_stderr_>, format=0x7f8cf18e76a8 "[%s] %s\n", ap=ap@entry=0x7f8cba7faca0) at vfprintf.c:1301
#6  0x00007f8d084544c6 in ___fprintf_chk (fp=0x7f8d0870e680 <_IO_2_1_stderr_>, flag=1, format=<optimized out>) at fprintf_chk.c:35
#7  0x00007f8cf18cf9ad in event_logv_ () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#8  0x00007f8cf18cfb44 in event_warn () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#9  0x00007f8cf18d146c in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#10 0x00007f8cf18c7114 in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#11 0x00007f8cf918dab9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f8cf9189da8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f8cf91a677b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007f8cf8a446b8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007f8cf8a44eeb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007f8cf91be588 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#17 0x00007f8cf91ba5eb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#18 0x00007f8d041c06db in start_thread (arg=0x7f8cba7fc700) at pthread_create.c:463
#19 0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f8cbaffd700 (LWP 10977)):
#0  0x00007f8d041c69f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f8cbaffc358) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f8cbaffc308, cond=0x7f8cbaffc330) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f8cbaffc330, mutex=0x7f8cbaffc308) at pthread_cond_wait.c:655
#3  0x00007f8cf91b2999 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f8cf91b29c7 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f8cf918d4db in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f8cf9189da8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f8cf91a677b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f8cf8a44608 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f8cf8a44edb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f8cf91be588 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f8cf91ba5eb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f8d041c06db in start_thread (arg=0x7f8cbaffd700) at pthread_create.c:463
#13 0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f8cbb7fe700 (LWP 10976)):
#0  0x00007f8d041c6ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f8cbb7fd7e0, expected=0, futex_word=0x7f8cb4004674) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7f8cbb7fd880, mutex=0x7f8cb4004620, cond=0x7f8cb4004648) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7f8cb4004648, mutex=0x7f8cb4004620, abstime=0x7f8cbb7fd880) at pthread_cond_wait.c:667
#3  0x00007f8cf91eb652 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f8cf91c1799 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f8cf91c1cfb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f8cf91ba5eb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f8d041c06db in start_thread (arg=0x7f8cbb7fe700) at pthread_create.c:463
#8  0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f8cbbfff700 (LWP 10975)):
#0  0x00007f8d041c6ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f8cbbffe7e0, expected=0, futex_word=0x7f8cb4004674) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7f8cbbffe880, mutex=0x7f8cb4004620, cond=0x7f8cb4004648) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7f8cb4004648, mutex=0x7f8cb4004620, abstime=0x7f8cbbffe880) at pthread_cond_wait.c:667
#3  0x00007f8cf91eb652 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f8cf91c1799 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f8cf91c1cfb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f8cf91ba5eb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f8d041c06db in start_thread (arg=0x7f8cbbfff700) at pthread_create.c:463
#8  0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f8cc8c5e700 (LWP 10974)):
#0  0x00007f8d041c69f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f8cc8c5d738) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f8cc8c5d6e8, cond=0x7f8cc8c5d710) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f8cc8c5d710, mutex=0x7f8cc8c5d6e8) at pthread_cond_wait.c:655
#3  0x00007f8cf91b2999 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f8cf91b29c7 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f8cf918d4db in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f8cf9189da8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f8cf91a677b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f8cf91be4d6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f8cf91ba5eb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f8d041c06db in start_thread (arg=0x7f8cc8c5e700) at pthread_create.c:463
#11 0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f8cc945f700 (LWP 10973)):
#0  __lll_unlock_wake_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:341
#1  0x00007f8d0845450c in _IO_acquire_lock_clear_flags2_fct (p=<synthetic pointer>) at ../libio/libioP.h:807
#2  ___fprintf_chk (fp=0x7f8d0870e680 <_IO_2_1_stderr_>, flag=1, format=<optimized out>) at fprintf_chk.c:30
#3  0x00007f8cf18cf9ad in event_logv_ () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f8cf18cfb44 in event_warn () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f8cf18d146c in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f8cf18c7114 in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#7  0x00007f8cf918dab9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f8cf9189da8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f8cf91a677b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f8cf91be4d6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f8cf91ba5eb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f8d041c06db in start_thread (arg=0x7f8cc945f700) at pthread_create.c:463
#13 0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f8ccbdf5700 (LWP 10966)):
#0  0x00007f8d08436bf9 in __GI___poll (fds=0x7f8cc401bde0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8d02140439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8d0214054c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8d08f9c90b in QEventDispatcherGlib::processEvents (this=0x7f8cc4000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f8d08f419ea in QEventLoop::exec (this=this@entry=0x7f8ccbdf49f0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f8d08d6022a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#6  0x00007f8d076a8d45 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f8d08d6516d in QThreadPrivate::start (arg=0x7f8d0791bd60) at thread/qthread_unix.cpp:368
#8  0x00007f8d041c06db in start_thread (arg=0x7f8ccbdf5700) at pthread_create.c:463
#9  0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f8cd1f5e700 (LWP 10965)):
#0  0x00007f8d041c69f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x556f2c0a7360) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x556f2c0a7310, cond=0x556f2c0a7338) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x556f2c0a7338, mutex=0x556f2c0a7310) at pthread_cond_wait.c:655
#3  0x00007f8cd30d4b2b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f8cd30d4857 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f8d041c06db in start_thread (arg=0x7f8cd1f5e700) at pthread_create.c:463
#6  0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f8cdc737700 (LWP 10964)):
#0  0x00007f8d08436bf9 in __GI___poll (fds=0x7f8cdc736928, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8d03bfe747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f8d03c0036a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f8cde4322a9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f8d08d6516d in QThreadPrivate::start (arg=0x556f2c07eab0) at thread/qthread_unix.cpp:368
#5  0x00007f8d041c06db in start_thread (arg=0x7f8cdc737700) at pthread_create.c:463
#6  0x00007f8d0844388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f8d0ba91b80 (LWP 10963)):
[KCrash Handler]
#6  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#7  0x00007f8d08362801 in __GI_abort () at abort.c:79
#8  0x00007f8d08d4ffa7 in qt_message_fatal (context=..., message=<synthetic pointer>...) at global/qlogging.cpp:1690
#9  QMessageLogger::fatal (this=this@entry=0x7ffd579d31b0, msg=msg@entry=0x7f8d0902eff0 "ASSERT: \"%s\" in file %s, line %d") at global/qlogging.cpp:796
#10 0x00007f8d08d4b476 in qt_assert (assertion=assertion@entry=0x7f8d008663b0 "uint(i) < uint(size())", file=file@entry=0x7f8d00866868 "/usr/include/x86_64-linux-gnu/qt5/QtCore/qstring.h", line=line@entry=887) at global/qglobal.cpp:3080
#11 0x00007f8d008288fa in QString::operator[] (i=<optimized out>, this=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qstring.h:887
#12 Akonadi::ExternalPartStorage::resolveAbsolutePath (filename=..., exists=exists@entry=0x0, legacyFallback=legacyFallback@entry=true) at ./src/private/externalpartstorage.cpp:98
#13 0x00007f8d00828ac2 in Akonadi::ExternalPartStorage::resolveAbsolutePath (filename=..., exists=exists@entry=0x0, legacyFallback=legacyFallback@entry=true) at ./src/private/externalpartstorage.cpp:71
#14 0x00007f8d07d1d04f in Akonadi::ItemSerializer::deserialize (item=..., label=..., data=..., version=version@entry=0, storage=storage@entry=Akonadi::ItemSerializer::External) at ./src/core/itemserializer.cpp:104
#15 0x00007f8d07d488ce in Akonadi::ProtocolHelper::parseItemFetchResult (data=..., valuePool=<optimized out>) at ./src/core/protocolhelper.cpp:482
#16 0x00007f8d07d9289d in Akonadi::ItemFetchJob::doHandleResponse (this=0x556f2ccbd440, tag=<optimized out>, response=...) at ./src/core/jobs/itemfetchjob.cpp:225
#17 0x00007f8d07d9ae3c in Akonadi::JobPrivate::handleResponse (this=0x556f2ccbd470, tag=4, response=...) at ./src/core/jobs/job.cpp:80
#18 0x00007f8d07d5ecd1 in Akonadi::SessionPrivate::handleCommand (this=0x556f2cbb21b0, tag=<optimized out>, cmd=...) at ./src/core/session.cpp:139
#19 0x00007f8d07d60681 in Akonadi::Session::qt_static_metacall (_o=<optimized out>, _id=<optimized out>, _a=0x7f8bb004b190, _c=<optimized out>) at ./obj-x86_64-linux-gnu/src/core/KF5AkonadiCore_autogen/include/moc_session.cpp:119
#20 0x00007f8d08f73122 in QObject::event (this=0x556f2cb96de0, e=<optimized out>) at kernel/qobject.cpp:1247
#21 0x00007f8d09cc182c in QApplicationPrivate::notify_helper (this=this@entry=0x556f2c0660c0, receiver=receiver@entry=0x556f2cb96de0, e=e@entry=0x7f8bb004b1f0) at kernel/qapplication.cpp:3722
#22 0x00007f8d09cc90f4 in QApplication::notify (this=0x7ffd579d3d90, receiver=0x556f2cb96de0, e=0x7f8bb004b1f0) at kernel/qapplication.cpp:3481
#23 0x00007f8d08f439a8 in QCoreApplication::notifyInternal2 (receiver=0x556f2cb96de0, event=event@entry=0x7f8bb004b1f0) at kernel/qcoreapplication.cpp:1024
#24 0x00007f8d08f4611d in QCoreApplication::sendEvent (event=0x7f8bb004b1f0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:233
#25 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x556f2c024490) at kernel/qcoreapplication.cpp:1699
#26 0x00007f8d08f466a8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1553
#27 0x00007f8d08f9d2c3 in postEventSourceDispatch (s=0x556f2c0bed60) at kernel/qeventdispatcher_glib.cpp:276
#28 0x00007f8d02140287 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007f8d021404c0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007f8d0214054c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007f8d08f9c8ef in QEventDispatcherGlib::processEvents (this=0x556f2c0cd1c0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#32 0x00007f8d08f419ea in QEventLoop::exec (this=this@entry=0x7ffd579d3c60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#33 0x00007f8d08f4aa84 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1297
#34 0x0000556f2ada448d in ?? ()
#35 0x00007f8d08343b97 in __libc_start_main (main=0x556f2ada3630, argc=1, argv=0x7ffd579d3ee8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd579d3ed8) at ../csu/libc-start.c:310
#36 0x0000556f2ada4aea in _start ()

Possible duplicates by query: bug 392092, bug 382868, bug 381294, bug 380831, bug 380485.

Reported using DrKonqi