Bug 411131

Summary: kmail crashed when scrolling in the viewer window
Product: [Applications] kontact Reporter: stefan.schwarzer
Component: generalAssignee: kdepim bugs <kdepim-bugs>
Status: RESOLVED FIXED    
Severity: crash Keywords: drkonqi
Priority: NOR    
Version: unspecified   
Target Milestone: ---   
Platform: Debian stable   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description stefan.schwarzer 2019-08-21 09:15:05 UTC 
Application: kontact (5.9.3)

Qt Version: 5.11.3
Frameworks Version: 5.54.0
Operating System: Linux 4.19.0-5-amd64 x86_64
Distribution: Debian GNU/Linux bullseye/sid

-- Information about the crash:
kmail segfaulted when scrolling in the viewer window. The message was signed, had both a text and html message and contained two encapsulated forwarded text emails. 
I cannot always reproduce this behavior, but it happens frequently also on other messages to me, mostly (as it of course the most probable) when the message looked at is not the first.  
There are bugreports about kmail crashing when closing subwindows and this may be  duplicate. However, as I got a reasonable stacktrace, 
the report may be of help.

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 0x7fb1a499c440 (LWP 10471))]

Thread 31 (Thread 0x7fb1857fa700 (LWP 11350)):
#0  0x00007fb1b76193f9 in futex_reltimed_wait_cancelable (private=0, reltime=0x7fb1857f9400, expected=0, futex_word=0x7fb1857f95e8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fb1b76193f9 in __pthread_cond_wait_common (abstime=0x7fb1857f94a0, mutex=0x7fb1857f9598, cond=0x7fb1857f95c0) at pthread_cond_wait.c:533
#2  0x00007fb1b76193f9 in __pthread_cond_timedwait (cond=0x7fb1857f95c0, mutex=0x7fb1857f9598, abstime=0x7fb1857f94a0) at pthread_cond_wait.c:667
#3  0x00007fb1b15a5a37 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb1b15a830a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb1b15a83f2 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb1b15ac981 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb1b15ade61 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb1b15b6c81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 30 (Thread 0x7fb16ffff700 (LWP 11285)):
#0  0x00007fb1b76193f9 in futex_reltimed_wait_cancelable (private=0, reltime=0x7fb16fffe400, expected=0, futex_word=0x7fb16fffe5e8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fb1b76193f9 in __pthread_cond_wait_common (abstime=0x7fb16fffe4a0, mutex=0x7fb16fffe598, cond=0x7fb16fffe5c0) at pthread_cond_wait.c:533
#2  0x00007fb1b76193f9 in __pthread_cond_timedwait (cond=0x7fb16fffe5c0, mutex=0x7fb16fffe598, abstime=0x7fb16fffe4a0) at pthread_cond_wait.c:667
#3  0x00007fb1b15a5a37 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb1b15a830a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb1b15a83f2 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb1b15ac981 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb1b15ade61 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb1b15b6c81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 29 (Thread 0x7fb07affd700 (LWP 10565)):
#0  0x00007fb1b6cd4829 in g_mutex_lock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb1b6c89d08 in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb1b8d473e3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fb1b8cf4cfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb1b8b44d8e in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb1b8b4ea07 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#7  0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 28 (Thread 0x7fb0866a6700 (LWP 10538)):
#0  0x00007fb1b8d471c5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007fb1b6c895d1 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb1b6c89ba0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb1b6c89d1c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb1b8d473e3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb1b8cf4cfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb1b8b44d8e in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb1b8b4ea07 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 27 (Thread 0x7fb12d4a2700 (LWP 10520)):
#0  0x00007fb1b87c5819 in __GI___poll (fds=0x7fb0800a0d60, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fb1b6c89bf6 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb1b6c89d1c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb1b8d473e3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb1b8cf4cfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb1b8b44d8e in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb1b8b4ea07 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 26 (Thread 0x7fb12dca3700 (LWP 10519)):
#0  0x00007fb1b87c5819 in __GI___poll (fds=0x7fb08c004e30, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fb1b6c89bf6 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb1b6c89d1c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb1b8d473e3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb1b8cf4cfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb1b8b44d8e in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb1b8b4ea07 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7fb12e4f9700 (LWP 10518)):
#0  0x00007ffe10ad39f9 in  ()
#1  0x00007ffe10ad3bfc in clock_gettime ()
#2  0x00007fb1b87ddff6 in __GI___clock_gettime (clock_id=1, tp=0x7fb12e4f83e0) at ../sysdeps/unix/clock_gettime.c:115
#3  0x00007fb1b8d46d01 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb1b8d45539 in QTimerInfoList::updateCurrentTime() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb1b8d45b35 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb1b8d4715e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb1b6c89129 in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007fb1b6c89b2b in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007fb1b6c89d1c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007fb1b8d473e3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fb1b8cf4cfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007fb1b8b44d8e in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007fb1b8b4ea07 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#15 0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7fb12f7fe700 (LWP 10501)):
#0  0x00007fb1accf01f0 in event_add_nolock_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#1  0x00007fb1accf071a in event_add () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#2  0x00007fb1b157a8a6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fb1b1599c8b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb1b15bb204 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb1b15b6c81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#7  0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7fb160ff9700 (LWP 10500)):
#0  0x00007fb1b76193f9 in futex_reltimed_wait_cancelable (private=0, reltime=0x7fb160ff8400, expected=0, futex_word=0x7fb160ff85e8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fb1b76193f9 in __pthread_cond_wait_common (abstime=0x7fb160ff84a0, mutex=0x7fb160ff8598, cond=0x7fb160ff85c0) at pthread_cond_wait.c:533
#2  0x00007fb1b76193f9 in __pthread_cond_timedwait (cond=0x7fb160ff85c0, mutex=0x7fb160ff8598, abstime=0x7fb160ff84a0) at pthread_cond_wait.c:667
#3  0x00007fb1b15a5a37 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb1b15a830a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb1b15a83f2 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb1b15ac981 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb1b15ade61 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb1b15b6c81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7fb1617fa700 (LWP 10499)):
#0  0x00007fb1b761900c in futex_wait_cancelable (private=0, expected=0, futex_word=0x7fb1ad45dfb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb1b761900c in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fb1ad45df68, cond=0x7fb1ad45df90) at pthread_cond_wait.c:502
#2  0x00007fb1b761900c in __pthread_cond_wait (cond=0x7fb1ad45df90, mutex=0x7fb1ad45df68) at pthread_cond_wait.c:655
#3  0x00007fb1ad367e6a in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007fb1ad367e89 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7fb12ffff700 (LWP 10498)):
#0  0x00007fb1b87dd76f in __libc_enable_asynccancel () at ../sysdeps/unix/sysv/linux/x86_64/cancellation.S:56
#1  0x00007fb1b87c5806 in __GI___poll (fds=0x7fb124007030, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#2  0x00007fb1a2b3e131 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007fb1a2b2f9a0 in pa_mainloop_poll () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007fb1a2b2ffee in pa_mainloop_iterate () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007fb1a2b300a0 in pa_mainloop_run () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007fb1a2b3e079 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#7  0x00007fb1a2adb458 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-12.2.so
#8  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7fb161ffb700 (LWP 10497)):
#0  0x00007fb1b87dd71b in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:63
#1  0x00007fb1b87df4e4 in ___fprintf_chk (fp=0x7fb1b88948b0 <_IO_stdfile_2_lock>, flag=1, format=0x7fb1acd12848 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007fb1accfaa5a in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fb1accfac34 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007fb1accfc588 in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007fb1accf2329 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007fb1b157a779 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb1b1599c8b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb1b15bb204 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb1b15b6c81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#11 0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7fb1627fc700 (LWP 10496)):
#0  0x00007fb1b76193f9 in futex_reltimed_wait_cancelable (private=0, reltime=0x7fb1627fb3c0, expected=0, futex_word=0x7fb1627fb5a8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fb1b76193f9 in __pthread_cond_wait_common (abstime=0x7fb1627fb460, mutex=0x7fb1627fb558, cond=0x7fb1627fb580) at pthread_cond_wait.c:533
#2  0x00007fb1b76193f9 in __pthread_cond_timedwait (cond=0x7fb1627fb580, mutex=0x7fb1627fb558, abstime=0x7fb1627fb460) at pthread_cond_wait.c:667
#3  0x00007fb1b15a5a37 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb1b15a830a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb1b157a370 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb1b1599c8b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb1b15bb204 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb1b15b6c81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7fb162ffd700 (LWP 10495)):
#0  0x00007fb1b76193f9 in futex_reltimed_wait_cancelable (private=0, reltime=0x7fb162ffc3c0, expected=0, futex_word=0x7fb162ffc5a8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fb1b76193f9 in __pthread_cond_wait_common (abstime=0x7fb162ffc460, mutex=0x7fb162ffc558, cond=0x7fb162ffc580) at pthread_cond_wait.c:533
#2  0x00007fb1b76193f9 in __pthread_cond_timedwait (cond=0x7fb162ffc580, mutex=0x7fb162ffc558, abstime=0x7fb162ffc460) at pthread_cond_wait.c:667
#3  0x00007fb1b15a5a37 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb1b15a830a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb1b157a370 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb1b1599c8b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb1b15bb204 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb1b15b6c81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7fb1637fe700 (LWP 10494)):
#0  0x00007fb1b761900c in futex_wait_cancelable (private=0, expected=0, futex_word=0x555d81545408) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb1b761900c in __pthread_cond_wait_common (abstime=0x0, mutex=0x555d81545348, cond=0x555d815453e0) at pthread_cond_wait.c:502
#2  0x00007fb1b761900c in __pthread_cond_wait (cond=0x555d815453e0, mutex=0x555d81545348) at pthread_cond_wait.c:655
#3  0x00007fb1b15a5969 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb1b1f0b7d8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb1b15bdd86 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb1b15b6c81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7fb163fff700 (LWP 10493)):
#0  0x00007fb1b761900c in futex_wait_cancelable (private=0, expected=0, futex_word=0x7fb163ffe5f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb1b761900c in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fb163ffe5a8, cond=0x7fb163ffe5d0) at pthread_cond_wait.c:502
#2  0x00007fb1b761900c in __pthread_cond_wait (cond=0x7fb163ffe5d0, mutex=0x7fb163ffe5a8) at pthread_cond_wait.c:655
#3  0x00007fb1b15a5969 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb1b15a8318 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb1b15a83af in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb1b15ac998 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb1b15ade61 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb1b15b6c81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7fb16cff9700 (LWP 10492)):
#0  0x00007fb1b87dd71b in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:63
#1  0x00007fb1b87df4e4 in ___fprintf_chk (fp=0x7fb1b88948b0 <_IO_stdfile_2_lock>, flag=1, format=0x7fb1acd12848 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007fb1accfaa5a in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fb1accfac34 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007fb1accfc588 in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007fb1accf2329 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007fb1b157a8b4 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb1b1599c8b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb1b06aadba in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb1b06ab267 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb1b15bb338 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fb1b15b6c81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#13 0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7fb16d7fa700 (LWP 10491)):
#0  0x00007fb1b761900c in futex_wait_cancelable (private=0, expected=0, futex_word=0x7fb16d7f95f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb1b761900c in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fb16d7f95a8, cond=0x7fb16d7f95d0) at pthread_cond_wait.c:502
#2  0x00007fb1b761900c in __pthread_cond_wait (cond=0x7fb16d7f95d0, mutex=0x7fb16d7f95a8) at pthread_cond_wait.c:655
#3  0x00007fb1b15a5969 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb1b15a8318 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb1b15a83af in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb1b15ac998 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb1b15adc7f in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb1b15b6c81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7fb16dffb700 (LWP 10490)):
#0  0x00007fb1b761900c in futex_wait_cancelable (private=0, expected=0, futex_word=0x7fb16dffa5f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb1b761900c in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fb16dffa5a8, cond=0x7fb16dffa5d0) at pthread_cond_wait.c:502
#2  0x00007fb1b761900c in __pthread_cond_wait (cond=0x7fb16dffa5d0, mutex=0x7fb16dffa5a8) at pthread_cond_wait.c:655
#3  0x00007fb1b15a5969 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb1b15a8318 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb1b15a83af in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb1b15ac998 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb1b15ade61 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb1b15b6c81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7fb16e7fc700 (LWP 10489)):
#0  0x00007fb1b761900c in futex_wait_cancelable (private=0, expected=0, futex_word=0x7fb16e7fb5f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb1b761900c in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fb16e7fb5a8, cond=0x7fb16e7fb5d0) at pthread_cond_wait.c:502
#2  0x00007fb1b761900c in __pthread_cond_wait (cond=0x7fb16e7fb5d0, mutex=0x7fb16e7fb5a8) at pthread_cond_wait.c:655
#3  0x00007fb1b15a5969 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb1b15a8318 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb1b15a83af in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb1b15ac998 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb1b15adc7f in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb1b15b6c81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fb16effd700 (LWP 10488)):
#0  0x00007fb1b761900c in futex_wait_cancelable (private=0, expected=0, futex_word=0x7fb16effc5f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb1b761900c in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fb16effc5a8, cond=0x7fb16effc5d0) at pthread_cond_wait.c:502
#2  0x00007fb1b761900c in __pthread_cond_wait (cond=0x7fb16effc5d0, mutex=0x7fb16effc5a8) at pthread_cond_wait.c:655
#3  0x00007fb1b15a5969 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb1b15a8318 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb1b15a83af in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb1b15ac998 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb1b15adc7f in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb1b15b6c81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fb16f7fe700 (LWP 10487)):
#0  0x00007fb1b761900c in futex_wait_cancelable (private=0, expected=0, futex_word=0x7fb16f7fd5f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb1b761900c in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fb16f7fd5a8, cond=0x7fb16f7fd5d0) at pthread_cond_wait.c:502
#2  0x00007fb1b761900c in __pthread_cond_wait (cond=0x7fb16f7fd5d0, mutex=0x7fb16f7fd5a8) at pthread_cond_wait.c:655
#3  0x00007fb1b15a5969 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb1b15a8318 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb1b15a83af in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb1b15ac998 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb1b15adc7f in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb1b15b6c81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fb185ffb700 (LWP 10483)):
#0  0x00007fb1b76193f9 in futex_reltimed_wait_cancelable (private=0, reltime=0x7fb185ffa400, expected=0, futex_word=0x7fb185ffa5e8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fb1b76193f9 in __pthread_cond_wait_common (abstime=0x7fb185ffa4a0, mutex=0x7fb185ffa598, cond=0x7fb185ffa5c0) at pthread_cond_wait.c:533
#2  0x00007fb1b76193f9 in __pthread_cond_timedwait (cond=0x7fb185ffa5c0, mutex=0x7fb185ffa598, abstime=0x7fb185ffa4a0) at pthread_cond_wait.c:667
#3  0x00007fb1b15a5a37 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb1b15a830a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb1b15a83f2 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb1b15ac981 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb1b15ade61 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb1b15b6c81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fb186ffd700 (LWP 10481)):
#0  0x00007fb1b76193f9 in futex_reltimed_wait_cancelable (private=0, reltime=0x7fb186ffc400, expected=0, futex_word=0x7fb186ffc5e8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fb1b76193f9 in __pthread_cond_wait_common (abstime=0x7fb186ffc4a0, mutex=0x7fb186ffc598, cond=0x7fb186ffc5c0) at pthread_cond_wait.c:533
#2  0x00007fb1b76193f9 in __pthread_cond_timedwait (cond=0x7fb186ffc5c0, mutex=0x7fb186ffc598, abstime=0x7fb186ffc4a0) at pthread_cond_wait.c:667
#3  0x00007fb1b15a5a37 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb1b15a830a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb1b15a83f2 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb1b15ac981 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb1b15ade61 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb1b15b6c81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fb1877fe700 (LWP 10480)):
#0  0x00007fb1b87dd71b in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:63
#1  0x00007fb1b87df4e4 in ___fprintf_chk (fp=0x7fb1b88948b0 <_IO_stdfile_2_lock>, flag=1, format=0x7fb1acd12848 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007fb1accfaa5a in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fb1accfac34 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007fb1accfc588 in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007fb1accf2329 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007fb1b157a7cd in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb1b1599c8b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb1b15bb204 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb1b15b6c81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#11 0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fb187fff700 (LWP 10479)):
#0  0x00007fb1b761900c in futex_wait_cancelable (private=0, expected=0, futex_word=0x7fb187ffe588) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb1b761900c in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fb187ffe538, cond=0x7fb187ffe560) at pthread_cond_wait.c:502
#2  0x00007fb1b761900c in __pthread_cond_wait (cond=0x7fb187ffe560, mutex=0x7fb187ffe538) at pthread_cond_wait.c:655
#3  0x00007fb1b15a5969 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb1b15a8318 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb1b15a83af in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb1b157a35f in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb1b1599c8b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb1b15bb204 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb1b15b6c81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#11 0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fb198f78700 (LWP 10478)):
#0  0x00007fb1b87dd749 in __lll_unlock_wake_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:309
#1  0x00007fb1b87df57c in _IO_acquire_lock_clear_flags2_fct (p=<synthetic pointer>) at ../libio/libioP.h:769
#2  0x00007fb1b87df57c in ___fprintf_chk (fp=0x7fb1b8893680 <_IO_2_1_stderr_>, flag=1, format=<optimized out>) at fprintf_chk.c:30
#3  0x00007fb1accfaa5a in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007fb1accfac34 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007fb1accfc588 in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007fb1accf2329 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#7  0x00007fb1b157a7cd in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb1b1599c8b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb1b15bb204 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb1b15b6c81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#12 0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fb19af3a700 (LWP 10475)):
#0  0x00007fb1b87c5819 in __GI___poll (fds=0x7fb19006f970, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fb1b6c89bf6 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb1b6c89d1c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb1b8d473e3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb1b8cf4cfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb1b8b44d8e in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb1b81dd545 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fb1b8b4ea07 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fb1a154e700 (LWP 10474)):
#0  0x00007fb1b761900c in futex_wait_cancelable (private=0, expected=0, futex_word=0x555d812d2e0c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb1b761900c in __pthread_cond_wait_common (abstime=0x0, mutex=0x555d812d2db8, cond=0x555d812d2de0) at pthread_cond_wait.c:502
#2  0x00007fb1b761900c in __pthread_cond_wait (cond=0x555d812d2de0, mutex=0x555d812d2db8) at pthread_cond_wait.c:655
#3  0x00007fb1a1a7f98b in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007fb1a1a7f5b7 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fb1a3ba9700 (LWP 10473)):
#0  0x00007fb1b87c5819 in __GI___poll (fds=0x7fb1a3ba85b8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fb1b7848cf7 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fb1b784a91a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fb1a4488d79 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fb1b8b4ea07 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb1b7612fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007fb1b87d04cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fb1a499c440 (LWP 10471)):
[KCrash Handler]
#6  0x0000000000000281 in  ()
#7  0x00007fb1b099fd95 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb1b019d2a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb1b1de3cbd in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb1b1e1c959 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fb1b1e1c43e in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fb1b1556688 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007fb1b157710a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007fb1b1577baf in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007fb1b1577d48 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007fb1aff8558d in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#17 0x00007fb1b8d1fd1b in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007fb1b9670501 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007fb1b96779b0 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007fb1b8cf6029 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007fb1b8cf900b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007fb1b8d47da3 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007fb1b6c899ee in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007fb1b6c89c88 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007fb1b6c89d1c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007fb1b8d473c7 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007fb1a451f391 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#28 0x00007fb1b8cf4cfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007fb1b8cfccd2 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x0000555d7f79e738 in  ()
#31 0x00007fb1b86fb09b in __libc_start_main (main=0x555d7f79dba0, argc=1, argv=0x7ffe10a8e098, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe10a8e088) at ../csu/libc-start.c:308
#32 0x0000555d7f79ee4a in _start ()
[Inferior 1 (process 10471) detached]

Reported using DrKonqi
Comment 1 stefan.schwarzer 2019-12-20 22:28:56 UTC 
cannot be reproduced any more in kontact 5.12.3