Application: kontact (5.10.0)

Qt Version: 5.12.0
Frameworks Version: 5.53.0
Operating System: Linux 4.19.12-1-default x86_64
Distribution: "openSUSE Tumbleweed"

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

When new email arrives, popup with email notification is displayed. I click on "Show the email" button and the window with email is displayed.
Now I close the window with the email and couple seconds later I got a notification that the Kontact application crashed and option to restart the application.

The crash can be reproduced every time.

-- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fbac7021a40 (LWP 759))]

Thread 28 (Thread 0x7fbabaa71700 (LWP 19232)):
#0  0x00007fbad7aa68c8 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fbad0c04e97 in base::ConditionVariable::TimedWait () at ./../../3rdparty/chromium/base/synchronization/condition_variable_posix.cc:120
#2  0x00007fbad0c057fa in base::WaitableEvent::TimedWaitUntil () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:221
#3  0x00007fbad0c058e2 in base::WaitableEvent::TimedWait () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:161
#4  0x00007fbad0bc3321 in base::internal::SchedulerWorker::Delegate::WaitForWork () at ./../../3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:37
#5  0x00007fbad0bc5e57 in base::internal::SchedulerWorker::RunWorker () at ./../../3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:296
#6  0x00007fbad0bc6444 in base::internal::SchedulerWorker::RunPooledWorker () at ./../../3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:224
#7  0x00007fbad0c079f1 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#8  0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#9  0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 27 (Thread 0x7fba0faa8700 (LWP 17485)):
#0  0x00007fbad7aa68c8 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fbad0c04e97 in base::ConditionVariable::TimedWait () at ./../../3rdparty/chromium/base/synchronization/condition_variable_posix.cc:120
#2  0x00007fbad0c057fa in base::WaitableEvent::TimedWaitUntil () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:221
#3  0x00007fbad0c058e2 in base::WaitableEvent::TimedWait () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:161
#4  0x00007fbad0bc3321 in base::internal::SchedulerWorker::Delegate::WaitForWork () at ./../../3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:37
#5  0x00007fbad0bc6186 in base::internal::SchedulerWorker::RunWorker () at ./../../3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:324
#6  0x00007fbad0bc6444 in base::internal::SchedulerWorker::RunPooledWorker () at ./../../3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:224
#7  0x00007fbad0c079f1 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#8  0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#9  0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 26 (Thread 0x7fba0d8e4700 (LWP 17398)):
#0  0x00007fbad8e5e2c9 in poll () from /lib64/libc.so.6
#1  0x00007fbad6868fb6 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007fbad68690dc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fbad958e88b in QEventDispatcherGlib::processEvents (this=0x564fb9ca0120, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fbad953902b in QEventLoop::exec (this=this@entry=0x7fba0d8e3b60, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007fbad93833b6 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007fbad9384702 in QThreadPrivate::start (arg=0x564fbfb3f3d0) at thread/qthread_unix.cpp:361
#7  0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#8  0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 25 (Thread 0x7fba0e8e6700 (LWP 17066)):
#0  0x00007fbac30e8410 in pa_iochannel_is_hungup () from /usr/lib64/pulseaudio/libpulsecommon-12.2.so
#1  0x00007fbac30fc78a in ?? () from /usr/lib64/pulseaudio/libpulsecommon-12.2.so
#2  0x00007fbac30fcae9 in ?? () from /usr/lib64/pulseaudio/libpulsecommon-12.2.so
#3  0x00007fbac30fd33a in ?? () from /usr/lib64/pulseaudio/libpulsecommon-12.2.so
#4  0x00007fbac3167ca8 in pa_mainloop_dispatch () from /usr/lib64/libpulse.so.0
#5  0x00007fbac3167f7c in pa_mainloop_iterate () from /usr/lib64/libpulse.so.0
#6  0x00007fbac3168020 in pa_mainloop_run () from /usr/lib64/libpulse.so.0
#7  0x00007fbac3176039 in ?? () from /usr/lib64/libpulse.so.0
#8  0x00007fbac310ce28 in ?? () from /usr/lib64/pulseaudio/libpulsecommon-12.2.so
#9  0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#10 0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 24 (Thread 0x7fba0f2a7700 (LWP 9809)):
#0  0x00007fbad68afea9 in g_mutex_lock () from /usr/lib64/libglib-2.0.so.0
#1  0x00007fbad6868f7e in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007fbad68690dc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fbad958e88b in QEventDispatcherGlib::processEvents (this=0x564fb747cde0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fbad953902b in QEventLoop::exec (this=this@entry=0x7fba0f2a6b60, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007fbad93833b6 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007fbad9384702 in QThreadPrivate::start (arg=0x564fbf0379f0) at thread/qthread_unix.cpp:361
#7  0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#8  0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 23 (Thread 0x7fbabb272700 (LWP 9802)):
#0  0x00007fbad8e5e2c9 in poll () from /lib64/libc.so.6
#1  0x00007fbad6868fb6 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007fbad68690dc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fbad958e88b in QEventDispatcherGlib::processEvents (this=0x564fbfad4120, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fbad953902b in QEventLoop::exec (this=this@entry=0x7fbabb271b60, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007fbad93833b6 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007fbad9384702 in QThreadPrivate::start (arg=0x564fbfa49450) at thread/qthread_unix.cpp:361
#7  0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#8  0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 22 (Thread 0x7fba19be5700 (LWP 823)):
#0  0x00007fbad8e63739 in syscall () from /lib64/libc.so.6
#1  0x00007fbad9386a24 in QtLinuxFutex::_q_futex (val3=0, addr2=0x0, val2=0, val=<optimized out>, op=0, addr=<optimized out>) at thread/qfutex_p.h:105
#2  QtLinuxFutex::futexWait<QBasicAtomicInteger<unsigned int> > (expectedValue=<optimized out>, futex=...) at thread/qfutex_p.h:107
#3  futexSemaphoreTryAcquire_loop<false> (timeout=-1, nn=8589934593, curValue=<optimized out>, u=...) at thread/qsemaphore.cpp:219
#4  futexSemaphoreTryAcquire<false> (timeout=-1, n=<optimized out>, u=...) at thread/qsemaphore.cpp:262
#5  QSemaphore::acquire (this=0x7fbad80bc440, n=<optimized out>) at thread/qsemaphore.cpp:326
#6  0x00007fbad7ff0b84 in ?? () from /usr/lib64/libQt5Network.so.5
#7  0x00007fbad9384702 in QThreadPrivate::start (arg=0x7fbad80bc420) at thread/qthread_unix.cpp:361
#8  0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#9  0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 21 (Thread 0x7fba1a3e6700 (LWP 822)):
#0  0x00007ffeb83f29b9 in ?? ()
#1  0x00007ffeb83f2bbc in clock_gettime ()
#2  0x00007fbad8e76876 in clock_gettime () from /lib64/libc.so.6
#3  0x00007fbad958e1a1 in qt_clock_gettime (ts=0x7fba1a3e58a0, clock=1) at kernel/qelapsedtimer_unix.cpp:175
#4  do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at kernel/qelapsedtimer_unix.cpp:166
#5  qt_gettime () at kernel/qelapsedtimer_unix.cpp:175
#6  0x00007fbad958c9e9 in QTimerInfoList::updateCurrentTime (this=this@entry=0x564fb6ddd360) at kernel/qtimerinfo_unix.cpp:91
#7  0x00007fbad958cfe5 in QTimerInfoList::timerWait (this=0x564fb6ddd360, tm=...) at kernel/qtimerinfo_unix.cpp:388
#8  0x00007fbad958e5fe in timerSourcePrepareHelper (timeout=0x7fba1a3e5984, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:161
#9  timerSourcePrepare (source=<optimized out>, timeout=0x7fba1a3e5984) at kernel/qeventdispatcher_glib.cpp:165
#10 0x00007fbad6868509 in g_main_context_prepare () from /usr/lib64/libglib-2.0.so.0
#11 0x00007fbad6868eeb in ?? () from /usr/lib64/libglib-2.0.so.0
#12 0x00007fbad68690dc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#13 0x00007fbad958e88b in QEventDispatcherGlib::processEvents (this=0x564fb685ce80, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#14 0x00007fbad953902b in QEventLoop::exec (this=this@entry=0x7fba1a3e5b60, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#15 0x00007fbad93833b6 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#16 0x00007fbad9384702 in QThreadPrivate::start (arg=0x564fb6814750) at thread/qthread_unix.cpp:361
#17 0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#18 0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 20 (Thread 0x7fba1eac8700 (LWP 803)):
#0  0x00007fbad8e5e2c9 in poll () from /lib64/libc.so.6
#1  0x00007fbad6868fb6 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007fbad68690dc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fbad958e88b in QEventDispatcherGlib::processEvents (this=0x564fb6646a10, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fbad953902b in QEventLoop::exec (this=this@entry=0x7fba1eac7b60, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007fbad93833b6 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007fbad9384702 in QThreadPrivate::start (arg=0x564fb66463d0) at thread/qthread_unix.cpp:361
#7  0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#8  0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 19 (Thread 0x7fba1fff0700 (LWP 800)):
#0  0x00007fbad8e5e2c9 in poll () from /lib64/libc.so.6
#1  0x00007fbad6868fb6 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007fbad68690dc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fbad958e88b in QEventDispatcherGlib::processEvents (this=0x564fb6395330, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fbad953902b in QEventLoop::exec (this=this@entry=0x7fba1ffefb60, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007fbad93833b6 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007fbad9384702 in QThreadPrivate::start (arg=0x564fb6427fd0) at thread/qthread_unix.cpp:361
#7  0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#8  0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 18 (Thread 0x7fba207f1700 (LWP 799)):
#0  0x00007fbad9384bcf in QMutex::unlock (this=this@entry=0x564fb6457ec0) at /usr/include/c++/8/bits/atomic_base.h:742
#1  0x00007fbad958ed55 in QMutexLocker::unlock (this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:240
#2  QMutexLocker::~QMutexLocker (this=<synthetic pointer>, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:213
#3  QThreadData::canWaitLocked (this=<optimized out>) at ../../include/QtCore/5.12.0/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:269
#4  postEventSourcePrepare (timeout=<synthetic pointer>, s=0x564fb646e560) at kernel/qeventdispatcher_glib.cpp:259
#5  postEventSourceCheck (source=0x564fb646e560) at kernel/qeventdispatcher_glib.cpp:269
#6  0x00007fbad68689e1 in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#7  0x00007fbad6868f60 in ?? () from /usr/lib64/libglib-2.0.so.0
#8  0x00007fbad68690dc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#9  0x00007fbad958e88b in QEventDispatcherGlib::processEvents (this=0x564fb6385620, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#10 0x00007fbad953902b in QEventLoop::exec (this=this@entry=0x7fba207f0b60, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#11 0x00007fbad93833b6 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#12 0x00007fbad9384702 in QThreadPrivate::start (arg=0x564fb647d1b0) at thread/qthread_unix.cpp:361
#13 0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#14 0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 17 (Thread 0x7fba21048700 (LWP 798)):
#0  0x00007fbad8e59d34 in read () from /lib64/libc.so.6
#1  0x00007fbad68aeb20 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007fbad6868abb in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fbad6868f60 in ?? () from /usr/lib64/libglib-2.0.so.0
#4  0x00007fbad68690dc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#5  0x00007fbad958e88b in QEventDispatcherGlib::processEvents (this=0x564fb636e530, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007fbad953902b in QEventLoop::exec (this=this@entry=0x7fba21047b60, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#7  0x00007fbad93833b6 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#8  0x00007fbad9384702 in QThreadPrivate::start (arg=0x564fb61f3960) at thread/qthread_unix.cpp:361
#9  0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#10 0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 16 (Thread 0x7fba23942700 (LWP 786)):
#0  0x00007fbad7aa64dc in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fbad0c04dc9 in base::ConditionVariable::Wait () at ./../../3rdparty/chromium/base/synchronization/condition_variable_posix.cc:71
#2  0x00007fbad0c05808 in base::WaitableEvent::TimedWaitUntil () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:223
#3  0x00007fbad0c0589f in base::WaitableEvent::Wait () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:154
#4  0x00007fbad0bc3338 in base::internal::SchedulerWorker::Delegate::WaitForWork () at ./../../3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:35
#5  0x00007fbad0bc6186 in base::internal::SchedulerWorker::RunWorker () at ./../../3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:324
#6  0x00007fbad0bc64c4 in base::internal::SchedulerWorker::RunDedicatedWorker () at ./../../3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:248
#7  0x00007fbad0c079f1 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#8  0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#9  0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 15 (Thread 0x7fba24143700 (LWP 785)):
#0  0x00007fbad8e760cc in __lll_lock_wait_private () from /lib64/libc.so.6
#1  0x00007fbad8e77df4 in __fprintf_chk () from /lib64/libc.so.6
#2  0x00007fbacca9c02f in event_logv_ () from /usr/lib64/libevent-2.1.so.6
#3  0x00007fbacca9c1f4 in event_warn () from /usr/lib64/libevent-2.1.so.6
#4  0x00007fbacca9db60 in ?? () from /usr/lib64/libevent-2.1.so.6
#5  0x00007fbacca93998 in event_base_loop () from /usr/lib64/libevent-2.1.so.6
#6  0x00007fbad0c0b5e4 in base::MessagePumpLibevent::Run () at ./../../3rdparty/chromium/base/message_loop/message_pump_libevent.cc:247
#7  0x00007fbad0ba1deb in base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:102
#8  base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:85
#9  0x00007fbad0bd47c1 in base::Thread::Run () at ./../../3rdparty/chromium/base/threading/thread.cc:255
#10 base::Thread::ThreadMain () at ./../../3rdparty/chromium/base/threading/thread.cc:337
#11 0x00007fbad0c079f1 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#12 0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#13 0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 14 (Thread 0x7fbab68c8700 (LWP 783)):
#0  0x00007fbad7aa64dc in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fbacd0da09a in ?? () from /usr/lib64/libQt5Script.so.5
#2  0x00007fbacd0da0bb in ?? () from /usr/lib64/libQt5Script.so.5
#3  0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#4  0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 13 (Thread 0x7fbab1587700 (LWP 782)):
#0  0x00007fbad8e59d34 in read () from /lib64/libc.so.6
#1  0x00007fbac30ddec1 in pa_read () from /usr/lib64/pulseaudio/libpulsecommon-12.2.so
#2  0x00007fbac31674fe in pa_mainloop_prepare () from /usr/lib64/libpulse.so.0
#3  0x00007fbac3167f60 in pa_mainloop_iterate () from /usr/lib64/libpulse.so.0
#4  0x00007fbac3168020 in pa_mainloop_run () from /usr/lib64/libpulse.so.0
#5  0x00007fbac3176039 in ?? () from /usr/lib64/libpulse.so.0
#6  0x00007fbac310ce28 in ?? () from /usr/lib64/pulseaudio/libpulsecommon-12.2.so
#7  0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#8  0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 12 (Thread 0x7fbab7139700 (LWP 781)):
#0  0x00007fbad7aa68c8 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fbad0c04e97 in base::ConditionVariable::TimedWait () at ./../../3rdparty/chromium/base/synchronization/condition_variable_posix.cc:120
#2  0x00007fbad0c057fa in base::WaitableEvent::TimedWaitUntil () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:221
#3  0x00007fbad0b7f220 in base::MessagePumpDefault::Run () at ./../../3rdparty/chromium/base/message_loop/message_pump_default.cc:63
#4  0x00007fbad0ba1deb in base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:102
#5  base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:85
#6  0x00007fbad0bd47c1 in base::Thread::Run () at ./../../3rdparty/chromium/base/threading/thread.cc:255
#7  base::Thread::ThreadMain () at ./../../3rdparty/chromium/base/threading/thread.cc:337
#8  0x00007fbad0c079f1 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#9  0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#10 0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 11 (Thread 0x7fbab793a700 (LWP 780)):
#0  0x00007fbad8e760cc in __lll_lock_wait_private () from /lib64/libc.so.6
#1  0x00007fbad8e77df4 in __fprintf_chk () from /lib64/libc.so.6
#2  0x00007fbacca9c02f in event_logv_ () from /usr/lib64/libevent-2.1.so.6
#3  0x00007fbacca9c1f4 in event_warn () from /usr/lib64/libevent-2.1.so.6
#4  0x00007fbacca9db60 in ?? () from /usr/lib64/libevent-2.1.so.6
#5  0x00007fbacca93998 in event_base_loop () from /usr/lib64/libevent-2.1.so.6
#6  0x00007fbad0c0b4fd in base::MessagePumpLibevent::Run () at ./../../3rdparty/chromium/base/message_loop/message_pump_libevent.cc:237
#7  0x00007fbad0ba1deb in base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:102
#8  base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:85
#9  0x00007fbad0bd47c1 in base::Thread::Run () at ./../../3rdparty/chromium/base/threading/thread.cc:255
#10 base::Thread::ThreadMain () at ./../../3rdparty/chromium/base/threading/thread.cc:337
#11 0x00007fbad0c079f1 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#12 0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#13 0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 10 (Thread 0x7fbab813b700 (LWP 779)):
#0  0x00007fbad7aa68c8 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fbad0c04e97 in base::ConditionVariable::TimedWait () at ./../../3rdparty/chromium/base/synchronization/condition_variable_posix.cc:120
#2  0x00007fbad0c057fa in base::WaitableEvent::TimedWaitUntil () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:221
#3  0x00007fbad0b7f220 in base::MessagePumpDefault::Run () at ./../../3rdparty/chromium/base/message_loop/message_pump_default.cc:63
#4  0x00007fbad0ba1deb in base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:102
#5  base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:85
#6  0x00007fbad0bd47c1 in base::Thread::Run () at ./../../3rdparty/chromium/base/threading/thread.cc:255
#7  base::Thread::ThreadMain () at ./../../3rdparty/chromium/base/threading/thread.cc:337
#8  0x00007fbad0c079f1 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#9  0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#10 0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 9 (Thread 0x7fbab893c700 (LWP 778)):
#0  0x00007fbad7aa64dc in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fbad0c04dc9 in base::ConditionVariable::Wait () at ./../../3rdparty/chromium/base/synchronization/condition_variable_posix.cc:71
#2  0x00007fbad14d35c8 in cc::SingleThreadTaskGraphRunner::Run () at ./../../3rdparty/chromium/cc/raster/single_thread_task_graph_runner.cc:123
#3  0x00007fbad0bd5d7f in base::SimpleThread::ThreadMain () at ./../../3rdparty/chromium/base/threading/simple_thread.cc:81
#4  0x00007fbad0c079f1 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#5  0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#6  0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 8 (Thread 0x7fbab926e700 (LWP 777)):
#0  0x00007fbad7aa64dc in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fbad0c04dc9 in base::ConditionVariable::Wait () at ./../../3rdparty/chromium/base/synchronization/condition_variable_posix.cc:71
#2  0x00007fbad0c05808 in base::WaitableEvent::TimedWaitUntil () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:223
#3  0x00007fbad0c0589f in base::WaitableEvent::Wait () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:154
#4  0x00007fbad0bc3338 in base::internal::SchedulerWorker::Delegate::WaitForWork () at ./../../3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:35
#5  0x00007fbad0bc6186 in base::internal::SchedulerWorker::RunWorker () at ./../../3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:324
#6  0x00007fbad0bc6484 in base::internal::SchedulerWorker::RunSharedWorker () at ./../../3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:236
#7  0x00007fbad0c079f1 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#8  0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#9  0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 7 (Thread 0x7fbab9a6f700 (LWP 776)):
#0  0x00007fbad8e59e07 in write () from /lib64/libc.so.6
#1  0x00007fbad8dea62d in _IO_file_write@@GLIBC_2.2.5 () from /lib64/libc.so.6
#2  0x00007fbad8de99df in new_do_write () from /lib64/libc.so.6
#3  0x00007fbad8dead5e in __GI__IO_file_xsputn () from /lib64/libc.so.6
#4  0x00007fbad8dc183a in buffered_vfprintf () from /lib64/libc.so.6
#5  0x00007fbad8dbec62 in vfprintf () from /lib64/libc.so.6
#6  0x00007fbad8e77e46 in __fprintf_chk () from /lib64/libc.so.6
#7  0x00007fbacca9c02f in event_logv_ () from /usr/lib64/libevent-2.1.so.6
#8  0x00007fbacca9c1f4 in event_warn () from /usr/lib64/libevent-2.1.so.6
#9  0x00007fbacca9db60 in ?? () from /usr/lib64/libevent-2.1.so.6
#10 0x00007fbacca93998 in event_base_loop () from /usr/lib64/libevent-2.1.so.6
#11 0x00007fbad0c0b5e4 in base::MessagePumpLibevent::Run () at ./../../3rdparty/chromium/base/message_loop/message_pump_libevent.cc:247
#12 0x00007fbad0ba1deb in base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:102
#13 base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:85
#14 0x00007fbad0555424 in content::BrowserProcessSubThread::IOThreadRun () at ../../3rdparty/chromium/content/browser/browser_process_sub_thread.cc:178
#15 0x00007fbad0bd4918 in base::Thread::ThreadMain () at ./../../3rdparty/chromium/base/threading/thread.cc:337
#16 0x00007fbad0c079f1 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#17 0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#18 0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7fbabba73700 (LWP 772)):
#0  0x00007fbad7aa68c8 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fbad0c04e97 in base::ConditionVariable::TimedWait () at ./../../3rdparty/chromium/base/synchronization/condition_variable_posix.cc:120
#2  0x00007fbad0c057fa in base::WaitableEvent::TimedWaitUntil () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:221
#3  0x00007fbad0c058e2 in base::WaitableEvent::TimedWait () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:161
#4  0x00007fbad0bc3321 in base::internal::SchedulerWorker::Delegate::WaitForWork () at ./../../3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:37
#5  0x00007fbad0bc6186 in base::internal::SchedulerWorker::RunWorker () at ./../../3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:324
#6  0x00007fbad0bc6444 in base::internal::SchedulerWorker::RunPooledWorker () at ./../../3rdparty/chromium/base/task_scheduler/scheduler_worker.cc:224
#7  0x00007fbad0c079f1 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#8  0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#9  0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7fbabc274700 (LWP 771)):
#0  0x00007fbad8dffb56 in __strcmp_sse2_unaligned () from /lib64/libc.so.6
#1  0x00007fbad8da2f71 in _nl_make_l10nflist.localalias.0 () from /lib64/libc.so.6
#2  0x00007fbad8da0bb4 in _nl_find_domain () from /lib64/libc.so.6
#3  0x00007fbad8da04d0 in __dcigettext () from /lib64/libc.so.6
#4  0x00007fbad8df704c in strerror_r () from /lib64/libc.so.6
#5  0x00007fbad8df6f6f in strerror () from /lib64/libc.so.6
#6  0x00007fbacca9c1e1 in event_warn () from /usr/lib64/libevent-2.1.so.6
#7  0x00007fbacca9db60 in ?? () from /usr/lib64/libevent-2.1.so.6
#8  0x00007fbacca93998 in event_base_loop () from /usr/lib64/libevent-2.1.so.6
#9  0x00007fbad0c0b4a9 in base::MessagePumpLibevent::Run () at ./../../3rdparty/chromium/base/message_loop/message_pump_libevent.cc:214
#10 0x00007fbad0ba1deb in base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:102
#11 base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:85
#12 0x00007fbad0bc9a14 in base::internal::ServiceThread::Run () at ./../../3rdparty/chromium/base/task_scheduler/service_thread.cc:60
#13 0x00007fbad0bd4918 in base::Thread::ThreadMain () at ./../../3rdparty/chromium/base/threading/thread.cc:337
#14 0x00007fbad0c079f1 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#15 0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#16 0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7fbabd276700 (LWP 769)):
#0  0x00007fbad8e760f9 in __lll_unlock_wake_private () from /lib64/libc.so.6
#1  0x00007fbad8e77e8c in __fprintf_chk () from /lib64/libc.so.6
#2  0x00007fbacca9c02f in event_logv_ () from /usr/lib64/libevent-2.1.so.6
#3  0x00007fbacca9c1f4 in event_warn () from /usr/lib64/libevent-2.1.so.6
#4  0x00007fbacca9db60 in ?? () from /usr/lib64/libevent-2.1.so.6
#5  0x00007fbacca93998 in event_base_loop () from /usr/lib64/libevent-2.1.so.6
#6  0x00007fbad0c0b4fd in base::MessagePumpLibevent::Run () at ./../../3rdparty/chromium/base/message_loop/message_pump_libevent.cc:237
#7  0x00007fbad0ba1deb in base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:102
#8  base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:85
#9  0x00007fbad0bd47c1 in base::Thread::Run () at ./../../3rdparty/chromium/base/threading/thread.cc:255
#10 base::Thread::ThreadMain () at ./../../3rdparty/chromium/base/threading/thread.cc:337
#11 0x00007fbad0c079f1 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#12 0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#13 0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7fbac0059700 (LWP 762)):
#0  0x00007fbad8e59d34 in read () from /lib64/libc.so.6
#1  0x00007fbad68aeb20 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007fbad6868abb in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fbad6868f60 in ?? () from /usr/lib64/libglib-2.0.so.0
#4  0x00007fbad68690dc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#5  0x00007fbad958e88b in QEventDispatcherGlib::processEvents (this=0x564fb5ef47b0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007fbad953902b in QEventLoop::exec (this=this@entry=0x7fbac0058b30, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#7  0x00007fbad93833b6 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#8  0x00007fbad8878565 in ?? () from /usr/lib64/libQt5DBus.so.5
#9  0x00007fbad9384702 in QThreadPrivate::start (arg=0x7fbad88f2d80) at thread/qthread_unix.cpp:361
#10 0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#11 0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7fbac1f10700 (LWP 761)):
#0  0x00007fbad7aa64dc in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fbac23b9083 in ?? () from /usr/lib64/dri/i965_dri.so
#2  0x00007fbac23b8dd7 in ?? () from /usr/lib64/dri/i965_dri.so
#3  0x00007fbad7aa0554 in start_thread () from /lib64/libpthread.so.0
#4  0x00007fbad8e68ccf in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7fbac7021a40 (LWP 759)):
[KCrash Handler]
#6  std::_Rb_tree<void const*, std::pair<void const* const, std::unique_ptr<base::SupportsUserData::Data, std::default_delete<base::SupportsUserData::Data> > >, std::_Select1st<std::pair<void const* const, std::unique_ptr<base::SupportsUserData::Data, std::default_delete<base::SupportsUserData::Data> > > >, std::less<void const*>, std::allocator<std::pair<void const* const, std::unique_ptr<base::SupportsUserData::Data, std::default_delete<base::SupportsUserData::Data> > > > >::_M_lower_bound () at /usr/include/c++/8/bits/stl_tree.h:1904
#7  std::_Rb_tree<void const*, std::pair<void const* const, std::unique_ptr<base::SupportsUserData::Data, std::default_delete<base::SupportsUserData::Data> > >, std::_Select1st<std::pair<void const* const, std::unique_ptr<base::SupportsUserData::Data, std::default_delete<base::SupportsUserData::Data> > > >, std::less<void const*>, std::allocator<std::pair<void const* const, std::unique_ptr<base::SupportsUserData::Data, std::default_delete<base::SupportsUserData::Data> > > > >::find () at /usr/include/c++/8/bits/stl_tree.h:2552
#8  std::map<void const*, std::unique_ptr<base::SupportsUserData::Data, std::default_delete<base::SupportsUserData::Data> >, std::less<void const*>, std::allocator<std::pair<void const* const, std::unique_ptr<base::SupportsUserData::Data, std::default_delete<base::SupportsUserData::Data> > > > >::find () at /usr/include/c++/8/bits/stl_map.h:1194
#9  base::SupportsUserData::GetUserData () at ./../../3rdparty/chromium/base/supports_user_data.cc:19
#10 0x00007fbad0546d40 in content::BrowserContext::GetServiceManagerConnectionFor () at ../../3rdparty/chromium/content/browser/browser_context.cc:634
#11 0x00007fbad088fc4d in content::RenderProcessHostImpl::Cleanup () at ../../3rdparty/chromium/content/browser/renderer_host/render_process_host_impl.cc:3347
#12 0x00007fbad088d8f6 in content::RenderProcessHostImpl::RemoveRoute () at ../../3rdparty/chromium/content/browser/renderer_host/render_process_host_impl.cc:2446
#13 0x00007fbad089982b in content::RenderViewHostImpl::~RenderViewHostImpl () at ../../3rdparty/chromium/content/browser/renderer_host/render_view_host_impl.cc:274
#14 0x00007fbad0899a51 in content::RenderViewHostImpl::~RenderViewHostImpl () at ../../3rdparty/chromium/content/browser/renderer_host/render_view_host_impl.cc:280
#15 0x00007fbad08992a4 in content::RenderViewHostImpl::ShutdownAndDestroy () at ../../3rdparty/chromium/content/browser/renderer_host/render_view_host_impl.cc:810
#16 0x00007fbad0690705 in content::FrameTree::ReleaseRenderViewHostRef () at ../../3rdparty/chromium/content/browser/frame_host/frame_tree.cc:407
#17 0x00007fbad06d03d1 in content::RenderFrameHostImpl::~RenderFrameHostImpl () at ../../3rdparty/chromium/content/browser/frame_host/render_frame_host_impl.cc:721
#18 0x00007fbad06d0ea1 in content::RenderFrameHostImpl::~RenderFrameHostImpl () at ../../3rdparty/chromium/content/browser/frame_host/render_frame_host_impl.cc:735
#19 0x00007fbad06e21f0 in std::default_delete<content::RenderFrameHostImpl>::operator() () at /usr/include/c++/8/bits/unique_ptr.h:81
#20 std::unique_ptr<content::RenderFrameHostImpl, std::default_delete<content::RenderFrameHostImpl> >::~unique_ptr () at /usr/include/c++/8/bits/unique_ptr.h:274
#21 content::RenderFrameHostManager::~RenderFrameHostManager () at ../../3rdparty/chromium/content/browser/frame_host/render_frame_host_manager.cc:96
#22 0x00007fbad069488b in content::FrameTreeNode::~FrameTreeNode () at ../../3rdparty/chromium/content/browser/frame_host/frame_tree_node.cc:138
#23 0x00007fbad068ee3b in content::FrameTree::~FrameTree () at ../../3rdparty/chromium/content/browser/frame_host/frame_tree.cc:119
#24 0x00007fbad09b4872 in content::WebContentsImpl::~WebContentsImpl () at ../../3rdparty/chromium/content/browser/web_contents/web_contents_impl.cc:584
#25 0x00007fbad09b4b71 in content::WebContentsImpl::~WebContentsImpl () at ../../3rdparty/chromium/content/browser/web_contents/web_contents_impl.cc:689
#26 0x00007fbacf031d07 in std::default_delete<content::WebContents>::operator() (this=0x564fbfa79c98, __ptr=<optimized out>) at /usr/include/c++/8/bits/unique_ptr.h:347
#27 std::unique_ptr<content::WebContents, std::default_delete<content::WebContents> >::~unique_ptr (this=0x564fbfa79c98, __in_chrg=<optimized out>) at /usr/include/c++/8/bits/unique_ptr.h:274
#28 QtWebEngineCore::WebContentsAdapter::~WebContentsAdapter (this=0x564fbfa79c80, __in_chrg=<optimized out>) at /usr/src/debug/libqt5-qtwebengine-5.12.0-1.1.x86_64/src/core/web_contents_adapter.cpp:428
#29 0x00007fbad8740fba in QtSharedPointer::ExternalRefCountData::destroy (this=0x564fbfa79c70) at /usr/include/qt5/QtCore/qsharedpointer_impl.h:157
#30 QSharedPointer<QtWebEngineCore::QuotaRequestController>::deref (dd=0x564fbfa79c70) at /usr/include/qt5/QtCore/qsharedpointer_impl.h:465
#31 QSharedPointer<QtWebEngineCore::WebContentsAdapter>::deref (dd=0x564fbfa79c70) at /usr/include/qt5/QtCore/qsharedpointer_impl.h:461
#32 QSharedPointer<QtWebEngineCore::WebContentsAdapter>::deref (this=<optimized out>) at /usr/include/qt5/QtCore/qsharedpointer_impl.h:460
#33 QSharedPointer<QtWebEngineCore::WebContentsAdapter>::~QSharedPointer (this=<optimized out>, __in_chrg=<optimized out>) at /usr/include/qt5/QtCore/qsharedpointer_impl.h:315
#34 QWebEnginePagePrivate::~QWebEnginePagePrivate (this=<optimized out>, __in_chrg=<optimized out>) at api/qwebenginepage.cpp:261
#35 0x00007fbad8741049 in QWebEnginePagePrivate::~QWebEnginePagePrivate (this=0x564fbf146610, __in_chrg=<optimized out>) at api/qwebenginepage.cpp:261
#36 0x00007fbad873ccce in QScopedPointerDeleter<QWebEnginePagePrivate>::cleanup (pointer=<optimized out>) at /usr/include/qt5/QtCore/qscopedpointer.h:52
#37 QScopedPointer<QWebEnginePagePrivate, QScopedPointerDeleter<QWebEnginePagePrivate> >::~QScopedPointer (this=0x564fbf954be0, __in_chrg=<optimized out>) at /usr/include/qt5/QtCore/qscopedpointer.h:107
#38 QWebEnginePage::~QWebEnginePage (this=0x564fbf954bd0, __in_chrg=<optimized out>) at api/qwebenginepage.cpp:968
#39 0x00007fba217ccfc9 in MessageViewer::MailWebEnginePage::~MailWebEnginePage (this=0x564fbf954bd0, __in_chrg=<optimized out>) at /usr/src/debug/messagelib-18.12.0-1.1.x86_64/messageviewer/src/viewer/webengine/mailwebenginepage.cpp:38
#40 0x00007fbad956207b in QObjectPrivate::deleteChildren (this=this@entry=0x564fb9fe4af0) at kernel/qobject.cpp:1995
#41 0x00007fbad9f66546 in QWidget::~QWidget (this=0x564fb6119ce0, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1702
#42 0x00007fba217cb7a9 in MessageViewer::MailWebEngineView::~MailWebEngineView (this=0x564fb6119ce0, __in_chrg=<optimized out>) at /usr/src/debug/messagelib-18.12.0-1.1.x86_64/messageviewer/src/viewer/webengine/mailwebengineview.cpp:120
#43 0x00007fba21774ea4 in MessageViewer::ViewerPrivate::~ViewerPrivate (this=0x564fc205a440, __in_chrg=<optimized out>) at /usr/src/debug/messagelib-18.12.0-1.1.x86_64/messageviewer/src/viewer/viewer_p.cpp:261
#44 0x00007fba21775059 in MessageViewer::ViewerPrivate::~ViewerPrivate (this=0x564fc205a440, __in_chrg=<optimized out>) at /usr/src/debug/messagelib-18.12.0-1.1.x86_64/messageviewer/src/viewer/viewer_p.cpp:256
#45 0x00007fbad956207b in QObjectPrivate::deleteChildren (this=this@entry=0x564fbf606450) at kernel/qobject.cpp:1995
#46 0x00007fbad9f66546 in QWidget::~QWidget (this=0x564fbebcee80, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1702
#47 0x00007fba21768ce9 in MessageViewer::Viewer::~Viewer (this=0x564fbebcee80, __in_chrg=<optimized out>) at /usr/src/debug/messagelib-18.12.0-1.1.x86_64/messageviewer/src/viewer/viewer.cpp:84
#48 0x00007fbad956207b in QObjectPrivate::deleteChildren (this=this@entry=0x564fb882a390) at kernel/qobject.cpp:1995
#49 0x00007fbad9f66546 in QWidget::~QWidget (this=0x564fb87896b0, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1702
#50 0x00007fba21f6d7c9 in KMReaderWin::~KMReaderWin (this=0x564fb87896b0, __in_chrg=<optimized out>) at /usr/src/debug/kmail-18.12.0-1.1.x86_64/src/kmreaderwin.cpp:227
#51 0x00007fbad956207b in QObjectPrivate::deleteChildren (this=this@entry=0x564fb9c7bc70) at kernel/qobject.cpp:1995
#52 0x00007fbad9f66546 in QWidget::~QWidget (this=0x564fb89af4d0, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1702
#53 0x00007fbada6dcdd4 in KMainWindow::~KMainWindow (this=0x564fb89af4d0, __in_chrg=<optimized out>) at /usr/src/debug/kxmlgui-5.53.0-1.1.x86_64/src/kmainwindow.cpp:399
#54 0x00007fba21fa075b in KMReaderMainWin::~KMReaderMainWin (this=this@entry=0x564fb89af4d0, __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at /usr/src/debug/kmail-18.12.0-1.1.x86_64/src/kmreadermainwin.cpp:125
#55 0x00007fba21fa07c9 in KMReaderMainWin::~KMReaderMainWin (this=0x564fb89af4d0, __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at /usr/src/debug/kmail-18.12.0-1.1.x86_64/src/kmreadermainwin.cpp:122
#56 0x00007fbad9564980 in QObject::event (this=this@entry=0x564fb89af4d0, e=e@entry=0x564fb8c47050) at kernel/qobject.cpp:1240
#57 0x00007fbad9f6b09b in QWidget::event (this=this@entry=0x564fb89af4d0, event=event@entry=0x564fb8c47050) at kernel/qwidget.cpp:9334
#58 0x00007fbada071e44 in QMainWindow::event (this=this@entry=0x564fb89af4d0, event=event@entry=0x564fb8c47050) at widgets/qmainwindow.cpp:1339
#59 0x00007fbada6df28b in KMainWindow::event (this=this@entry=0x564fb89af4d0, ev=ev@entry=0x564fb8c47050) at /usr/src/debug/kxmlgui-5.53.0-1.1.x86_64/src/kmainwindow.cpp:871
#60 0x00007fbada729295 in KXmlGuiWindow::event (this=0x564fb89af4d0, ev=0x564fb8c47050) at /usr/src/debug/kxmlgui-5.53.0-1.1.x86_64/src/kxmlguiwindow.cpp:119
#61 0x00007fbad9f2b591 in QApplicationPrivate::notify_helper (this=this@entry=0x564fb5af7ca0, receiver=receiver@entry=0x564fb89af4d0, e=e@entry=0x564fb8c47050) at kernel/qapplication.cpp:3753
#62 0x00007fbad9f32b50 in QApplication::notify (this=0x7ffeb82dcc10, receiver=0x564fb89af4d0, e=0x564fb8c47050) at kernel/qapplication.cpp:3500
#63 0x00007fbad953a359 in QCoreApplication::notifyInternal2 (receiver=0x564fb89af4d0, event=0x564fb8c47050) at ../../include/QtCore/5.12.0/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:322
#64 0x00007fbad953d357 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x564fb5af6a00) at kernel/qcoreapplication.cpp:1800
#65 0x00007fbad958f263 in postEventSourceDispatch (s=0x564fb5bd6e00) at kernel/qeventdispatcher_glib.cpp:276
#66 0x00007fbad6868c85 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#67 0x00007fbad6869048 in ?? () from /usr/lib64/libglib-2.0.so.0
#68 0x00007fbad68690dc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#69 0x00007fbad958e873 in QEventDispatcherGlib::processEvents (this=0x564fb5aff730, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#70 0x00007fbad953902b in QEventLoop::exec (this=this@entry=0x7ffeb82dcae0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#71 0x00007fbad9541192 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#72 0x0000564fb3bc9738 in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/kontact-18.12.0-1.1.x86_64/src/main.cpp:229
[Inferior 1 (process 759) detached]

Reported using DrKonqi