Application: kontact (5.12.2)

Qt Version: 5.13.1
Frameworks Version: 5.63.0
Operating System: Linux 5.2.14-1-default x86_64
Distribution: "openSUSE Tumbleweed"

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

Kontact -> calendar -> right click on date -> new event
enter subject and text body, add a reminder -> ok
right click the event -> edit
reminder -> add some reminders -> ok -> crash

The crash can be reproduced sometimes.

-- Backtrace:
Application: Kontact (kontact), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
29	  return SYSCALL_CANCEL (poll, fds, nfds, timeout);
[Current thread is 1 (Thread 0x7fdbc6863a80 (LWP 2633))]

Thread 25 (Thread 0x7fdae1a76700 (LWP 4093)):
#0  futex_abstimed_wait_cancelable (private=0, abstime=0x7fdae1a758e0, clockid=<optimized out>, expected=0, futex_word=0x7fdae1a75a08) at ../sysdeps/unix/sysv/linux/futex-internal.h:208
#1  __pthread_cond_wait_common (abstime=0x7fdae1a758e0, clockid=<optimized out>, mutex=0x7fdae1a759b8, cond=0x7fdae1a759e0) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x7fdae1a759e0, mutex=0x7fdae1a759b8, abstime=0x7fdae1a758e0) at pthread_cond_wait.c:656
#3  0x00007fdbcee24486 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fdbcee24e53 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fdbcee24fd1 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#6  0x00007fdbceddd141 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#7  0x00007fdbceddffdd in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#8  0x00007fdbcede06d4 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#9  0x00007fdbcee272c5 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#10 0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#11 0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7fdbb65ed700 (LWP 3989)):
#0  futex_abstimed_wait_cancelable (private=0, abstime=0x7fdbb65ec8e0, clockid=<optimized out>, expected=0, futex_word=0x7fdbb65eca08) at ../sysdeps/unix/sysv/linux/futex-internal.h:208
#1  __pthread_cond_wait_common (abstime=0x7fdbb65ec8e0, clockid=<optimized out>, mutex=0x7fdbb65ec9b8, cond=0x7fdbb65ec9e0) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x7fdbb65ec9e0, mutex=0x7fdbb65ec9b8, abstime=0x7fdbb65ec8e0) at pthread_cond_wait.c:656
#3  0x00007fdbcee24486 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fdbcee24e53 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fdbcee24fd1 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#6  0x00007fdbceddd141 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#7  0x00007fdbcede032b in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#8  0x00007fdbcede06d4 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#9  0x00007fdbcee272c5 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#10 0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#11 0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7fdb99ffb700 (LWP 3771)):
#0  futex_abstimed_wait_cancelable (private=0, abstime=0x7fdb99ffa8e0, clockid=<optimized out>, expected=0, futex_word=0x7fdb99ffaa08) at ../sysdeps/unix/sysv/linux/futex-internal.h:208
#1  __pthread_cond_wait_common (abstime=0x7fdb99ffa8e0, clockid=<optimized out>, mutex=0x7fdb99ffa9b8, cond=0x7fdb99ffa9e0) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x7fdb99ffa9e0, mutex=0x7fdb99ffa9b8, abstime=0x7fdb99ffa8e0) at pthread_cond_wait.c:656
#3  0x00007fdbcee24486 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fdbcee24e53 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fdbcee24fd1 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#6  0x00007fdbceddd141 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#7  0x00007fdbcede032b in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#8  0x00007fdbcede06d4 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#9  0x00007fdbcee272c5 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#10 0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#11 0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7fdadeeee700 (LWP 3739)):
#0  0x00007fdbd6833bdf in __GI___poll (fds=0x7fdbb00037e0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fdbd4e40a5e in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007fdbd4e40b2f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fdbd6def99b in QEventDispatcherGlib::processEvents (this=0x7fdbb0000ed0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fdbd6d980db in QEventLoop::exec (this=this@entry=0x7fdadeeedb20, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007fdbd6bd0021 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007fdbd6bd11a2 in QThreadPrivate::start (arg=0x56423da155f0) at thread/qthread_unix.cpp:360
#7  0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#8  0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7fdae1275700 (LWP 3310)):
#0  0x00007fdbd6833bdf in __GI___poll (fds=0x7fdba4005ae0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fdbd4e40a5e in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007fdbd4e40b2f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fdbd6def99b in QEventDispatcherGlib::processEvents (this=0x7fdba4002c80, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fdbd6d980db in QEventLoop::exec (this=this@entry=0x7fdae1274b20, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007fdbd6bd0021 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007fdbd6bd11a2 in QThreadPrivate::start (arg=0x56423d440980) at thread/qthread_unix.cpp:360
#7  0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#8  0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7fdae4185700 (LWP 3280)):
#0  futex_wait_cancelable (private=0, expected=0, futex_word=0x7fdae4184a18) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fdae41849c8, cond=0x7fdae41849f0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fdae41849f0, mutex=0x7fdae41849c8) at pthread_cond_wait.c:638
#3  0x00007fdbcee2438c in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fdbcee24e60 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fdbcee24f8f in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#6  0x00007fdbceddd116 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#7  0x00007fdbcede032b in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#8  0x00007fdbcede0714 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#9  0x00007fdbcee272c5 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#10 0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#11 0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7fdae2277700 (LWP 3160)):
#0  0x00007fdbd683e7d6 in epoll_wait (epfd=104, events=0x7fdb9c003530, maxevents=32, timeout=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fdbcb2794f9 in ?? () from /usr/lib64/libevent-2.1.so.7
#2  0x00007fdbcb28a086 in event_base_loop () from /usr/lib64/libevent-2.1.so.7
#3  0x00007fdbcee2b17a in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fdbcedb72a7 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fdbcedee44f in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#6  0x00007fdbcee272c5 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#7  0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#8  0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7fdae570a700 (LWP 3114)):
#0  __GI___libc_read (nbytes=16, buf=0x7fdae5709910, fd=83) at ../sysdeps/unix/sysv/linux/read.c:26
#1  __GI___libc_read (fd=83, buf=0x7fdae5709910, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007fdbd4df270f in ?? () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fdbd4e3f36e in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#4  0x00007fdbd4e40a02 in ?? () from /usr/lib64/libglib-2.0.so.0
#5  0x00007fdbd4e40b2f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#6  0x00007fdbd6def99b in QEventDispatcherGlib::processEvents (this=0x7fdba0012aa0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#7  0x00007fdbd6d980db in QEventLoop::exec (this=this@entry=0x7fdae5709b20, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#8  0x00007fdbd6bd0021 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#9  0x00007fdbd6bd11a2 in QThreadPrivate::start (arg=0x5642327b47d0) at thread/qthread_unix.cpp:360
#10 0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#11 0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7fdae6548700 (LWP 3097)):
#0  __GI___libc_read (nbytes=16, buf=0x7fdae6547910, fd=76) at ../sysdeps/unix/sysv/linux/read.c:26
#1  __GI___libc_read (fd=76, buf=0x7fdae6547910, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007fdbd4df270f in ?? () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fdbd4e3f36e in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#4  0x00007fdbd4e40a02 in ?? () from /usr/lib64/libglib-2.0.so.0
#5  0x00007fdbd4e40b2f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#6  0x00007fdbd6def99b in QEventDispatcherGlib::processEvents (this=0x7fdb94005750, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#7  0x00007fdbd6d980db in QEventLoop::exec (this=this@entry=0x7fdae6547b20, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#8  0x00007fdbd6bd0021 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#9  0x00007fdbd6bd11a2 in QThreadPrivate::start (arg=0x5642327d4050) at thread/qthread_unix.cpp:360
#10 0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#11 0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7fdae6d49700 (LWP 3002)):
#0  0x00007fdbd4e3e6d1 in ?? () from /usr/lib64/libglib-2.0.so.0
#1  0x00007fdbd4e3f00c in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007fdbd4e3f16f in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fdbd4e40a02 in ?? () from /usr/lib64/libglib-2.0.so.0
#4  0x00007fdbd4e40b2f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#5  0x00007fdbd6def99b in QEventDispatcherGlib::processEvents (this=0x7fdb8c0cfc90, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007fdbd6d980db in QEventLoop::exec (this=this@entry=0x7fdae6d48b20, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#7  0x00007fdbd6bd0021 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#8  0x00007fdbd6bd11a2 in QThreadPrivate::start (arg=0x5642326bcf00) at thread/qthread_unix.cpp:360
#9  0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#10 0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7fdae75c4700 (LWP 2924)):
#0  0x00007fdbd6833bdf in __GI___poll (fds=0x7fdb900039e0, nfds=1, timeout=9709) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fdbd4e40a5e in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007fdbd4e40b2f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fdbd6def99b in QEventDispatcherGlib::processEvents (this=0x7fdb90001f60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fdbd6d980db in QEventLoop::exec (this=this@entry=0x7fdae75c3b20, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007fdbd6bd0021 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007fdbd6bd11a2 in QThreadPrivate::start (arg=0x564232655480) at thread/qthread_unix.cpp:360
#7  0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#8  0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7fdb7d7fa700 (LWP 2811)):
#0  futex_wait_cancelable (private=0, expected=0, futex_word=0x7fdb7d7f9a18) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fdb7d7f99c8, cond=0x7fdb7d7f99f0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fdb7d7f99f0, mutex=0x7fdb7d7f99c8) at pthread_cond_wait.c:638
#3  0x00007fdbcee2438c in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fdbcee24e60 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fdbcee24f8f in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#6  0x00007fdbceddd116 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#7  0x00007fdbcede032b in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#8  0x00007fdbcede0754 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#9  0x00007fdbcee272c5 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#10 0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#11 0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7fdb7dffb700 (LWP 2810)):
#0  0x00007fdbd683e7d6 in epoll_wait (epfd=60, events=0x7fdb88004d50, maxevents=32, timeout=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fdbcb2794f9 in ?? () from /usr/lib64/libevent-2.1.so.7
#2  0x00007fdbcb28a086 in event_base_loop () from /usr/lib64/libevent-2.1.so.7
#3  0x00007fdbcee2b17a in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fdbcedb72a7 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fdbcedee44f in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#6  0x00007fdbcee272c5 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#7  0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#8  0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7fdb7effd700 (LWP 2797)):
#0  futex_wait_cancelable (private=0, expected=0, futex_word=0x7fdbcb6e2fb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fdbcb6e2f68, cond=0x7fdbcb6e2f90) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fdbcb6e2f90, mutex=0x7fdbcb6e2f68) at pthread_cond_wait.c:638
#3  0x00007fdbcb5e71fa in ?? () from /usr/lib64/libQt5Script.so.5
#4  0x00007fdbcb5e721b in ?? () from /usr/lib64/libQt5Script.so.5
#5  0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fdb7f7fe700 (LWP 2755)):
#0  0x00007fdbd6833bdf in __GI___poll (fds=0x7fdb70008570, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fdbcaf044f2 in ?? () from /usr/lib64/libpulse.so.0
#2  0x00007fdbcaef5e39 in pa_mainloop_poll () from /usr/lib64/libpulse.so.0
#3  0x00007fdbcaef64bf in pa_mainloop_iterate () from /usr/lib64/libpulse.so.0
#4  0x00007fdbcaef6570 in pa_mainloop_run () from /usr/lib64/libpulse.so.0
#5  0x00007fdbcaf04439 in ?? () from /usr/lib64/libpulse.so.0
#6  0x00007fdbc9408c78 in ?? () from /usr/lib64/pulseaudio/libpulsecommon-13.0.so
#7  0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#8  0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fdb98ff9700 (LWP 2753)):
#0  futex_wait_cancelable (private=0, expected=0, futex_word=0x7fdb98ff8958) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fdb98ff8908, cond=0x7fdb98ff8930) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fdb98ff8930, mutex=0x7fdb98ff8908) at pthread_cond_wait.c:638
#3  0x00007fdbcee2438c in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fdbcee24e60 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fdbcee24f8f in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#6  0x00007fdbced94cce in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#7  0x00007fdbcedb72a7 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#8  0x00007fdbcedee44f in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#9  0x00007fdbcee272c5 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#10 0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#11 0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fdb997fa700 (LWP 2752)):
#0  futex_wait_cancelable (private=0, expected=0, futex_word=0x56423261eb18) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x56423261ea58, cond=0x56423261eaf0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x56423261eaf0, mutex=0x56423261ea58) at pthread_cond_wait.c:638
#3  0x00007fdbcee2438c in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fdbcf85a1e8 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fdbcedf3b8d in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#6  0x00007fdbcee272c5 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#7  0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#8  0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fdb9b7fe700 (LWP 2744)):
#0  __GI___libc_write (nbytes=39, buf=0x7fdb9b7facf0, fd=2) at ../sysdeps/unix/sysv/linux/write.c:26
#1  __GI___libc_write (fd=2, buf=0x7fdb9b7facf0, nbytes=39) at ../sysdeps/unix/sysv/linux/write.c:24
#2  0x00007fdbd67c03c5 in _IO_new_file_write (f=0x7fdbd6900420 <_IO_2_1_stderr_>, data=0x7fdb9b7facf0, n=39) at fileops.c:1180
#3  0x00007fdbd67bf756 in new_do_write (fp=fp@entry=0x7fdbd6900420 <_IO_2_1_stderr_>, data=data@entry=0x7fdb9b7facf0 "[warn] epoll_wait: Bad file descriptor\n", to_do=to_do@entry=39) at libioP.h:947
#4  0x00007fdbd67c0ace in _IO_new_file_xsputn (n=39, data=<optimized out>, f=<optimized out>) at fileops.c:1259
#5  _IO_new_file_xsputn (f=0x7fdbd6900420 <_IO_2_1_stderr_>, data=<optimized out>, n=39) at fileops.c:1201
#6  0x00007fdbd67ac9f1 in buffered_vfprintf (s=s@entry=0x7fdbd6900420 <_IO_2_1_stderr_>, format=format@entry=0x7fdbcb29bbcc "[%s] %s\n", args=args@entry=0x7fdb9b7fd2a0, mode_flags=mode_flags@entry=2) at ../libio/libioP.h:947
#7  0x00007fdbd67a9a24 in __vfprintf_internal (s=0x7fdbd6900420 <_IO_2_1_stderr_>, format=0x7fdbcb29bbcc "[%s] %s\n", ap=ap@entry=0x7fdb9b7fd2a0, mode_flags=2) at vfprintf-internal.c:1346
#8  0x00007fdbd684c89f in ___fprintf_chk (fp=<optimized out>, flag=<optimized out>, format=<optimized out>) at fprintf_chk.c:33
#9  0x00007fdbcb274f2e in event_logv_ () from /usr/lib64/libevent-2.1.so.7
#10 0x00007fdbcb277b15 in event_warn () from /usr/lib64/libevent-2.1.so.7
#11 0x00007fdbcb279678 in ?? () from /usr/lib64/libevent-2.1.so.7
#12 0x00007fdbcb28a086 in event_base_loop () from /usr/lib64/libevent-2.1.so.7
#13 0x00007fdbcee2b128 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#14 0x00007fdbcedb72a7 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#15 0x00007fdbce2fe244 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#16 0x00007fdbcedee5c8 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#17 0x00007fdbcee272c5 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#18 0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#19 0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fdb9bfff700 (LWP 2743)):
#0  0x00007fdbced9416f in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#1  0x00007fdbcee2b15a in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#2  0x00007fdbcedb72a7 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#3  0x00007fdbcedee44f in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fdbcee272c5 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fdbb6dee700 (LWP 2706)):
#0  futex_abstimed_wait_cancelable (private=0, abstime=0x7fdbb6ded8e0, clockid=<optimized out>, expected=0, futex_word=0x7fdbb6deda08) at ../sysdeps/unix/sysv/linux/futex-internal.h:208
#1  __pthread_cond_wait_common (abstime=0x7fdbb6ded8e0, clockid=<optimized out>, mutex=0x7fdbb6ded9b8, cond=0x7fdbb6ded9e0) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x7fdbb6ded9e0, mutex=0x7fdbb6ded9b8, abstime=0x7fdbb6ded8e0) at pthread_cond_wait.c:656
#3  0x00007fdbcee24486 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fdbcee24e53 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fdbcee24fd1 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#6  0x00007fdbceddd141 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#7  0x00007fdbcede032b in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#8  0x00007fdbcede06d4 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#9  0x00007fdbcee272c5 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#10 0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#11 0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fdbb75ef700 (LWP 2705)):
#0  0x00007fdbd585f9b4 in __pthread_rwlock_rdlock_full (abstime=0x0, clockid=0, rwlock=0x7fdbd69014c0 <__libc_setlocale_lock>) at pthread_rwlock_common.c:353
#1  __GI___pthread_rwlock_rdlock (rwlock=0x7fdbd69014c0 <__libc_setlocale_lock>) at pthread_rwlock_rdlock.c:27
#2  0x00007fdbd67750a5 in __dcigettext (domainname=0x7fdbd68ca02e <_libc_intl_domainname> "libc", msgid1=0x7fdbd68ca4bf "Bad file descriptor", msgid2=msgid2@entry=0x0, plural=plural@entry=0, n=n@entry=0, category=category@entry=5) at dcigettext.c:526
#3  0x00007fdbd6773f8f in __GI___dcgettext (domainname=<optimized out>, msgid=<optimized out>, category=category@entry=5) at dcgettext.c:47
#4  0x00007fdbd67cddee in __GI___strerror_r (errnum=errnum@entry=9, buf=buf@entry=0x0, buflen=buflen@entry=0) at _strerror.c:71
#5  0x00007fdbd67cdd0f in strerror (errnum=9) at strerror.c:31
#6  0x00007fdbcb277b02 in event_warn () from /usr/lib64/libevent-2.1.so.7
#7  0x00007fdbcb279678 in ?? () from /usr/lib64/libevent-2.1.so.7
#8  0x00007fdbcb28a086 in event_base_loop () from /usr/lib64/libevent-2.1.so.7
#9  0x00007fdbcee2b24a in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#10 0x00007fdbcedb72a7 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#11 0x00007fdbcede62f4 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#12 0x00007fdbcedee5c8 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#13 0x00007fdbcee272c5 in ?? () from /usr/lib64/libQt5WebEngineCore.so.5
#14 0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#15 0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fdbbe63b700 (LWP 2695)):
#0  futex_wait_cancelable (private=0, expected=0, futex_word=0x56423210e92c) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x56423210e8d8, cond=0x56423210e900) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x56423210e900, mutex=0x56423210e8d8) at pthread_cond_wait.c:638
#3  0x00007fdbbec8cf3b in ?? () from /usr/lib64/dri/i965_dri.so
#4  0x00007fdbbec8ce37 in ?? () from /usr/lib64/dri/i965_dri.so
#5  0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fdbbfd53700 (LWP 2688)):
#0  0x00007fdbd6833bdf in __GI___poll (fds=0x7fdba40067a0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fdbd4e40a5e in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007fdbd4e40b2f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fdbd6def99b in QEventDispatcherGlib::processEvents (this=0x7fdbb8000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fdbd6d980db in QEventLoop::exec (this=this@entry=0x7fdbbfd52af0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007fdbd6bd0021 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007fdbd62644f6 in ?? () from /usr/lib64/libQt5DBus.so.5
#7  0x00007fdbd6bd11a2 in QThreadPrivate::start (arg=0x7fdbd62e6d80) at thread/qthread_unix.cpp:360
#8  0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#9  0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fdbc4b69700 (LWP 2670)):
#0  0x00007fdbd6833bdf in __GI___poll (fds=0x7fdbc4b68a28, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fdbd5898742 in ?? () from /usr/lib64/libxcb.so.1
#2  0x00007fdbd58993fa in xcb_wait_for_event () from /usr/lib64/libxcb.so.1
#3  0x00007fdbc4cc9f90 in ?? () from /usr/lib64/libQt5XcbQpa.so.5
#4  0x00007fdbd6bd11a2 in QThreadPrivate::start (arg=0x564231ff7f20) at thread/qthread_unix.cpp:360
#5  0x00007fdbd585af2a in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fdbd683e4af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fdbc6863a80 (LWP 2633)):
[KCrash Handler]
#6  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#7  0x00007fdbd676455d in __GI_abort () at abort.c:79
#8  0x00007fdbd69c164b in ?? () from /usr/lib64/libstdc++.so.6
#9  0x00007fdbd69cd088 in ?? () from /usr/lib64/libstdc++.so.6
#10 0x00007fdbd69cd0d3 in std::terminate() () from /usr/lib64/libstdc++.so.6
#11 0x00007fdbd69cd305 in __cxa_throw () from /usr/lib64/libstdc++.so.6
#12 0x00007fdbd6483f14 in Akonadi::Item::throwPayloadException (this=this@entry=0x7fff8c8a6270, spid=spid@entry=0, mtid=mtid@entry=12) at /usr/src/debug/akonadi-server-19.08.2-1.1.x86_64/src/core/exceptionbase.h:103
#13 0x00007fdbd64fccbf in Akonadi::Item::payloadImpl<QByteArray> (this=this@entry=0x7fff8c8a6270) at /usr/include/c++/9/bits/atomic_base.h:318
#14 0x00007fdbd64fb6e9 in Akonadi::Item::payload<QByteArray> (this=0x7fff8c8a6270) at /usr/src/debug/akonadi-server-19.08.2-1.1.x86_64/src/core/item.h:840
#15 Akonadi::DefaultItemSerializerPlugin::serialize (this=<optimized out>, item=..., label=..., data=..., version=<optimized out>) at /usr/src/debug/akonadi-server-19.08.2-1.1.x86_64/src/core/itemserializer.cpp:64
#16 0x00007fdbd64fd604 in Akonadi::ItemSerializerPlugin::apply (this=0x7fdbd66890a0 <Akonadi::(anonymous namespace)::Q_QGS_s_defaultItemSerializerPlugin::innerFunction()::holder+16>, item=..., other=...) at /usr/src/debug/akonadi-server-19.08.2-1.1.x86_64/src/core/itemserializerplugin.cpp:67
#17 0x00007fdbd64fb1d6 in Akonadi::ItemSerializer::apply (item=..., other=...) at /usr/src/debug/akonadi-server-19.08.2-1.1.x86_64/src/core/itemserializer.cpp:158
#18 0x00007fdbd64f407d in Akonadi::Item::apply (this=this@entry=0x56423deba318, other=...) at /usr/src/debug/akonadi-server-19.08.2-1.1.x86_64/src/core/item.cpp:741
#19 0x00007fdbd64fa245 in Akonadi::ItemMonitor::Private::slotItemChanged (this=0x56423deba300, item=..., aSet=...) at /usr/src/debug/akonadi-server-19.08.2-1.1.x86_64/src/core/itemmonitor_p.h:64
#20 0x00007fdbd6dc4638 in QtPrivate::QSlotObjectBase::call (a=0x7fff8c8a6180, r=0x56423deba300, this=0x7fdb940637c0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:394
#21 QMetaObject::activate (sender=0x56423deba480, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3789
#22 0x00007fdbd6503197 in Akonadi::Monitor::itemChanged (this=<optimized out>, _t1=..., _t2=...) at /usr/src/debug/akonadi-server-19.08.2-1.1.x86_64/build/src/core/KF5AkonadiCore_autogen/include/moc_monitor.cpp:902
#23 0x00007fdbd65123c1 in Akonadi::MonitorPrivate::emitToListeners<void (Akonadi::Monitor::*)(Akonadi::Item const&, QSet<QByteArray> const&), Akonadi::Item, QSet<QByteArray> > (signal=<optimized out>, this=0x5642337966e0) at /usr/include/qt5/QtCore/qhash.h:463
#24 Akonadi::MonitorPrivate::emitItemsNotification (this=0x5642337966e0, msg_=..., items=..., collection=..., collectionDest=...) at /usr/src/debug/akonadi-server-19.08.2-1.1.x86_64/src/core/monitor_p.cpp:1067
#25 0x00007fdbd651338e in Akonadi::MonitorPrivate::emitNotification (this=<optimized out>, msg=...) at /usr/src/debug/akonadi-server-19.08.2-1.1.x86_64/src/core/monitor_p.cpp:556
#26 0x00007fdbd651557c in Akonadi::MonitorPrivate::dispatchNotifications (this=0x5642337966e0) at /usr/src/debug/akonadi-server-19.08.2-1.1.x86_64/src/core/monitor_p.cpp:1001
#27 0x00007fdbd6515725 in Akonadi::MonitorPrivate::slotNotify (this=0x5642337966e0, msg=...) at /usr/src/debug/akonadi-server-19.08.2-1.1.x86_64/src/core/monitor_p.cpp:970
#28 0x00007fdbd6515bb8 in Akonadi::MonitorPrivate::handleCommands (this=0x5642337966e0) at /usr/include/qt5/QtCore/qsharedpointer_impl.h:461
#29 0x00007fdbd6504923 in Akonadi::Monitor::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /usr/src/debug/akonadi-server-19.08.2-1.1.x86_64/build/src/core/KF5AkonadiCore_autogen/include/moc_monitor.cpp:339
#30 0x00007fdbd6dc4eea in QObject::event (this=0x56423deba480, e=<optimized out>) at kernel/qobject.cpp:1260
#31 0x00007fdbd77cbc62 in QApplicationPrivate::notify_helper (this=this@entry=0x564231fda480, receiver=receiver@entry=0x56423deba480, e=e@entry=0x7fdb9411c180) at kernel/qapplication.cpp:3703
#32 0x00007fdbd77d51e0 in QApplication::notify (this=0x7fff8c8a6d80, receiver=0x56423deba480, e=0x7fdb9411c180) at kernel/qapplication.cpp:3449
#33 0x00007fdbd6d99572 in QCoreApplication::notifyInternal2 (receiver=0x56423deba480, event=0x7fdb9411c180) at ../../include/QtCore/../../src/corelib/kernel/qobject.h:143
#34 0x00007fdbd6d9c208 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x564231fd8200) at kernel/qcoreapplication.cpp:1840
#35 0x00007fdbd6df0343 in postEventSourceDispatch (s=0x5642320fb4e0) at kernel/qeventdispatcher_glib.cpp:277
#36 0x00007fdbd4e3ed3d in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#37 0x00007fdbd4e40af0 in ?? () from /usr/lib64/libglib-2.0.so.0
#38 0x00007fdbd4e40b2f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#39 0x00007fdbd6def981 in QEventDispatcherGlib::processEvents (this=0x56423210cd60, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#40 0x00007fdbd6d980db in QEventLoop::exec (this=this@entry=0x7fff8c8a6c50, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#41 0x00007fdbd6d9fd42 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#42 0x00005642306656fa in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/kontact-19.08.2-1.1.x86_64/src/main.cpp:229
[Inferior 1 (process 2633) detached]

Possible duplicates by query: bug 413708, bug 413398, bug 412300, bug 412218, bug 411687.

Reported using DrKonqi