Application: kontact (5.3.0 (QtWebEngine))

Qt Version: 5.7.0
Frameworks Version: 5.25.0
Operating System: Linux 4.4.0-34-generic x86_64
Distribution: KDE neon User Edition 5.7

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

I'm trying to reply an email, and kmail crashes. After that i'm not able to start the application againt. I've solved that deleting the content of ~/.local/share/kmail2autosave/

The crash can be reproduced every time.

-- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb0bea459c0 (LWP 15168))]

Thread 26 (Thread 0x7faf9f342700 (LWP 15216)):
#0  __libc_enable_asynccancel () at ../sysdeps/unix/sysv/linux/x86_64/cancellation.S:65
#1  0x00007fb0e20bbe82 in poll () at ../sysdeps/unix/syscall-template.S:84
#2  0x00007fb0dcb8939c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb0dcb894ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb0e2bfc23b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb0e2ba6cea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb0e29cbfb4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb0e29d0b98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb0deaf36fa in start_thread (arg=0x7faf9f342700) at pthread_create.c:333
#9  0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 25 (Thread 0x7fafa92b5700 (LWP 15214)):
#0  0x00007fb0e2a761a0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007fb0e2bf9eb9 in QTimerInfoList::updateCurrentTime() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb0e2bfa425 in QTimerInfoList::timerWait(timespec&) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fb0e2bfb7ee in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb0dcb8892d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fb0dcb892cb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fb0dcb894ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fb0e2bfc23b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb0e2ba6cea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fb0e29cbfb4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fb0e29d0b98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fb0deaf36fa in start_thread (arg=0x7fafa92b5700) at pthread_create.c:333
#12 0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 24 (Thread 0x7fafb8b4c700 (LWP 15212)):
#0  0x00007fb0dcb88ddc in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb0dcb89340 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb0dcb894ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb0e2bfc23b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb0e2ba6cea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb0e29cbfb4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb0e29d0b98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb0deaf36fa in start_thread (arg=0x7fafb8b4c700) at pthread_create.c:333
#8  0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 23 (Thread 0x7fafb934d700 (LWP 15210)):
#0  0x00007fb0dcbcdac9 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb0dcb88b51 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb0dcb89317 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb0dcb894ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb0e2bfc23b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb0e2ba6cea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb0e29cbfb4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb0e29d0b98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb0deaf36fa in start_thread (arg=0x7fafb934d700) at pthread_create.c:333
#9  0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 22 (Thread 0x7fafb9b4e700 (LWP 15208)):
#0  0x00007fb0dcbcdac9 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb0dcb8935e in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb0dcb894ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb0e2bfc23b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb0e2ba6cea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb0e29cbfb4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb0e29d0b98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb0deaf36fa in start_thread (arg=0x7fafb9b4e700) at pthread_create.c:333
#8  0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 21 (Thread 0x7fafba34f700 (LWP 15207)):
#0  0x00007fb0dcbcdae4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb0dcb88920 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb0dcb892cb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb0dcb894ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb0e2bfc23b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb0e2ba6cea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb0e29cbfb4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb0e29d0b98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb0deaf36fa in start_thread (arg=0x7fafba34f700) at pthread_create.c:333
#9  0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 20 (Thread 0x7fb0537fc700 (LWP 15202)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb0cf7bd5c4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007fb0cf7bd609 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007fb0deaf36fa in start_thread (arg=0x7fb0537fc700) at pthread_create.c:333
#4  0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 19 (Thread 0x7fb0857fa700 (LWP 15197)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb0d6142b70 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fb0d612b4e9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fb0d612b56b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb0d6126e3a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb0d73bd0fe in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb0d73bf534 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb0d73bf585 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb0d73bf669 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb0d6574c32 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb0d655e8f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fb0d658d5aa in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fb0d6589947 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007fb0deaf36fa in start_thread (arg=0x7fb0857fa700) at pthread_create.c:333
#14 0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 18 (Thread 0x7fb085ffb700 (LWP 15196)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb0d658c7af in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fb0d658cdc9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fb0d658cf80 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb0d6589947 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb0deaf36fa in start_thread (arg=0x7fb085ffb700) at pthread_create.c:333
#6  0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 17 (Thread 0x7fb0867fc700 (LWP 15195)):
#0  0x00007fb0b9fd86c6 in pa_pstream_ref () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-8.0.so
#1  0x00007fb0b9fd9061 in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-8.0.so
#2  0x00007fb0b9fd98ea in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-8.0.so
#3  0x00007fb0ba647cb0 in pa_mainloop_dispatch () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007fb0ba6480bc in pa_mainloop_iterate () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007fb0ba648160 in pa_mainloop_run () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007fb0ba656149 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#7  0x00007fb0b9fe9678 in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-8.0.so
#8  0x00007fb0deaf36fa in start_thread (arg=0x7fb0867fc700) at pthread_create.c:333
#9  0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 16 (Thread 0x7fb086ffd700 (LWP 15194)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007fb0d6580d92 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fb0d658162d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fb0d6562858 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb0d6574c32 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb0d655e8f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb0d658d5aa in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb0d6589947 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb0deaf36fa in start_thread (arg=0x7fb086ffd700) at pthread_create.c:333
#9  0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (Thread 0x7fb0877fe700 (LWP 15193)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb0d5c20cfd in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fb0d658ce5e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fb0d658cf80 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb0d6589947 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb0deaf36fa in start_thread (arg=0x7fb0877fe700) at pthread_create.c:333
#6  0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7fb087fff700 (LWP 15192)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb0d658159d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fb0d6581675 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fb0d656280d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb0d6574c32 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb0d655e8f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb0d658d5aa in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb0d6589947 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb0deaf36fa in start_thread (arg=0x7fb087fff700) at pthread_create.c:333
#9  0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7fb094ff9700 (LWP 15191)):
#0  __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007fb0e20d72b4 in ___fprintf_chk (fp=0x7fb0e2386770 <_IO_stdfile_2_lock>, flag=1, format=0x7fb0cded1bf1 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007fb0cdeb99af in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5
#3  0x00007fb0cdeb9ba4 in event_warn () from /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5
#4  0x00007fb0cdebe258 in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5
#5  0x00007fb0cdea938a in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5
#6  0x00007fb0d6539472 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb0d6574c32 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb0d655e8f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb0d5838db8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb0d5838efb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fb0d658d628 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fb0d6589947 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007fb0deaf36fa in start_thread (arg=0x7fb094ff9700) at pthread_create.c:333
#14 0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7fb0957fa700 (LWP 15190)):
#0  __lll_unlock_wake_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:341
#1  0x00007fb0e20d7368 in _IO_acquire_lock_clear_flags2_fct (p=<synthetic pointer>) at ../libio/libioP.h:877
#2  ___fprintf_chk (fp=0x7fb0e2385540 <_IO_2_1_stderr_>, flag=1, format=<optimized out>) at fprintf_chk.c:30
#3  0x00007fb0cdeb99af in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5
#4  0x00007fb0cdeb9ba4 in event_warn () from /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5
#5  0x00007fb0cdebe258 in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5
#6  0x00007fb0cdea938a in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5
#7  0x00007fb0d653931e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb0d6574c32 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb0d655e8f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb0d5838d08 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fb0d5838f5b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fb0d658d628 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007fb0d6589947 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007fb0deaf36fa in start_thread (arg=0x7fb0957fa700) at pthread_create.c:333
#15 0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7fb095ffb700 (LWP 15189)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb0d658159d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fb0d6581675 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fb0d656280d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb0d6574c32 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb0d655e8f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb0d5838c58 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb0d5838f4b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb0d658d628 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb0d6589947 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb0deaf36fa in start_thread (arg=0x7fb095ffb700) at pthread_create.c:333
#11 0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7fb0967fc700 (LWP 15188)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb0d658159d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fb0d6581675 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fb0d656280d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb0d6574c32 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb0d655e8f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb0d5838ba8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb0d5838f3b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb0d658d628 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb0d6589947 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb0deaf36fa in start_thread (arg=0x7fb0967fc700) at pthread_create.c:333
#11 0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7fb096ffd700 (LWP 15187)):
#0  0x00007fb0e20b7a2d in write () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fb0e2039b2f in _IO_new_file_write (f=0x7fb0e2385540 <_IO_2_1_stderr_>, data=0x7fb096ff9ac0, n=39) at fileops.c:1263
#2  0x00007fb0e203a2ba in new_do_write (to_do=39, data=0x7fb096ff9ac0 "[warn] epoll_wait: Bad file descriptor\n", fp=0x7fb0e2385540 <_IO_2_1_stderr_>) at fileops.c:518
#3  _IO_new_file_xsputn (f=0x7fb0e2385540 <_IO_2_1_stderr_>, data=<optimized out>, n=39) at fileops.c:1342
#4  0x00007fb0e2010f54 in buffered_vfprintf (s=0x7fb0e2385540 <_IO_2_1_stderr_>, format=<optimized out>, args=<optimized out>) at vfprintf.c:2341
#5  0x00007fb0e200e2ed in _IO_vfprintf_internal (s=s@entry=0x7fb0e2385540 <_IO_2_1_stderr_>, format=0x7fb0cded1bf1 "[%s] %s\n", ap=ap@entry=0x7fb096ffc078) at vfprintf.c:1293
#6  0x00007fb0e20d7309 in ___fprintf_chk (fp=0x7fb0e2385540 <_IO_2_1_stderr_>, flag=1, format=<optimized out>) at fprintf_chk.c:35
#7  0x00007fb0cdeb99af in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5
#8  0x00007fb0cdeb9ba4 in event_warn () from /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5
#9  0x00007fb0cdebe258 in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5
#10 0x00007fb0cdea938a in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5
#11 0x00007fb0d653931e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fb0d6574c32 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007fb0d655e8f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007fb0d5838af8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007fb0d5838f2b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007fb0d658d628 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#17 0x00007fb0d6589947 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#18 0x00007fb0deaf36fa in start_thread (arg=0x7fb096ffd700) at pthread_create.c:333
#19 0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fb0977fe700 (LWP 15186)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb0d658159d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fb0d6581675 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fb0d656280d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb0d6574c32 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb0d655e8f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb0d5838a48 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb0d5838f1b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb0d658d628 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb0d6589947 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb0deaf36fa in start_thread (arg=0x7fb0977fe700) at pthread_create.c:333
#11 0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fb097fff700 (LWP 15183)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007fb0d6580d92 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fb0d65901f8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fb0d659072d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb0d6589947 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb0deaf36fa in start_thread (arg=0x7fb097fff700) at pthread_create.c:333
#6  0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fb0ac9eb700 (LWP 15182)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007fb0d6580d92 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fb0d65901f8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fb0d659072d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb0d6589947 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb0deaf36fa in start_thread (arg=0x7fb0ac9eb700) at pthread_create.c:333
#6  0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fb0ad1ec700 (LWP 15181)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb0d658159d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fb0d6581675 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fb0d656280d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb0d6574c32 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb0d655e8f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb0d658d5aa in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb0d6589947 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb0deaf36fa in start_thread (arg=0x7fb0ad1ec700) at pthread_create.c:333
#9  0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fb0ad9ed700 (LWP 15180)):
#0  __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007fb0e20d72b4 in ___fprintf_chk (fp=0x7fb0e2386770 <_IO_stdfile_2_lock>, flag=1, format=0x7fb0cded1bf1 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007fb0cdeb99af in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5
#3  0x00007fb0cdeb9ba4 in event_warn () from /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5
#4  0x00007fb0cdebe258 in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5
#5  0x00007fb0cdea938a in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5
#6  0x00007fb0d65393b9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb0d6574c32 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb0d655e8f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb0d658d5aa in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb0d6589947 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fb0deaf36fa in start_thread (arg=0x7fb0ad9ed700) at pthread_create.c:333
#12 0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fb0afed0700 (LWP 15171)):
#0  0x00007fb0dcbcdac9 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb0dcb89498 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb0e2bfc23b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fb0e2ba6cea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb0e29cbfb4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb0e506b7a5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#6  0x00007fb0e29d0b98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb0deaf36fa in start_thread (arg=0x7fb0afed0700) at pthread_create.c:333
#8  0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fb0b0d9e700 (LWP 15170)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb0b8e0e213 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#2  0x00007fb0b8e0d937 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#3  0x00007fb0deaf36fa in start_thread (arg=0x7fb0b0d9e700) at pthread_create.c:333
#4  0x00007fb0e20c7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fb0bea459c0 (LWP 15168)):
[KCrash Handler]
#6  0x00007fb0e34c4740 in QWidget::focusPolicy() const () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#7  0x00007fb0e34caa68 in QWidget::setTabOrder(QWidget*, QWidget*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#8  0x00007fafc06ef580 in MessageComposer::RecipientLineNG::fixTabOrder(QWidget*) () from /usr/lib/x86_64-linux-gnu/libKF5MessageComposer.so.5
#9  0x00007fb0e12f0217 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5Libkdepim.so.5
#10 0x00007fafc197ec0e in KMComposerWin::rethinkFields (this=this@entry=0x210cf10, fromSlot=fromSlot@entry=false) at /workspace/build/kmail/src/editor/kmcomposerwin.cpp:871
#11 0x00007fafc1996a00 in KMComposerWin::KMComposerWin (this=this@entry=0x210cf10, aMsg=..., lastSignState=lastSignState@entry=false, lastEncryptState=lastEncryptState@entry=false, context=context@entry=KMail::Composer::NoTemplate, id=id@entry=0, textSelection=..., customTemplate=..., __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at /workspace/build/kmail/src/editor/kmcomposerwin.cpp:441
#12 0x00007fafc1997321 in KMComposerWin::create (msg=..., lastSignState=lastSignState@entry=false, lastEncryptState=lastEncryptState@entry=false, context=context@entry=KMail::Composer::NoTemplate, identity=identity@entry=0, textSelection=..., customTemplate=...) at /workspace/build/kmail/src/editor/kmcomposerwin.cpp:207
#13 0x00007fafc199735c in KMail::makeComposer (msg=..., lastSignState=lastSignState@entry=false, lastEncryptState=lastEncryptState@entry=false, context=context@entry=KMail::Composer::NoTemplate, identity=identity@entry=0, textSelection=..., customTemplate=...) at /workspace/build/kmail/src/editor/kmcomposerwin.cpp:200
#14 0x00007fafc1897c82 in KMKernel::recoverDeadLetters (this=this@entry=0x201db70) at /workspace/build/kmail/src/kmkernel.cpp:1259
#15 0x00007fafc1c81019 in KMailPart::KMailPart (this=this@entry=0x2002250, parentWidget=parentWidget@entry=0x1d99930, parent=parent@entry=0x1d99930, __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at /workspace/build/kmail/src/kmail_part.cpp:77
#16 0x00007fafc1c81661 in KPluginFactory::createPartInstance<KMailPart> (parentWidget=0x1d99930, parent=0x1d99930, args=...) at /usr/include/KF5/KCoreAddons/kpluginfactory.h:483
#17 0x00007fb0e3c25fdf in KPluginFactory::create(char const*, QWidget*, QObject*, QList<QVariant> const&, QString const&) () from /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#18 0x00007fb0e488bbff in KontactInterface::Core::createPart(char const*) () from /usr/lib/x86_64-linux-gnu/libKF5KontactInterface.so.5
#19 0x00007fafc37af706 in KMailPlugin::createPart (this=0x1fbff30) at /workspace/build/kmail/src/kontactplugin/kmail/kmail_plugin.cpp:189
#20 0x00007fb0e488fe6c in KontactInterface::Plugin::part() () from /usr/lib/x86_64-linux-gnu/libKF5KontactInterface.so.5
#21 0x00007fb0e4ab90f8 in Kontact::MainWindow::selectPlugin (this=0x1d99930, plugin=0x1fbff30) at /workspace/build/kontact/src/mainwindow.cpp:726
#22 0x00007fb0e4ab54c4 in Kontact::MainWindow::loadSettings (this=this@entry=0x1d99930) at /workspace/build/kontact/src/mainwindow.cpp:871
#23 0x00007fb0e4abb57a in Kontact::MainWindow::initObject (this=this@entry=0x1d99930) at /workspace/build/kontact/src/mainwindow.cpp:251
#24 0x00007fb0e4abbd71 in Kontact::MainWindow::MainWindow (this=0x1d99930, __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at /workspace/build/kontact/src/mainwindow.cpp:160
#25 0x000000000040515a in KontactApp::activate (this=0x7ffe4118bd90, args=..., workingDir=...) at /workspace/build/kontact/src/main.cpp:130
#26 0x00007fb0e4892a3d in KontactInterface::PimUniqueApplication::start(QStringList const&, bool) () from /usr/lib/x86_64-linux-gnu/libKF5KontactInterface.so.5
#27 0x000000000040425a in main (argc=1, argv=0x7ffe4118bee8) at /workspace/build/kontact/src/main.cpp:206

Reported using DrKonqi