Application: kontact (5.11.2)

Qt Version: 5.13.0
Frameworks Version: 5.59.0
Operating System: Linux 5.1.10-1-default x86_64
Distribution: "openSUSE Tumbleweed"

-- Information about the crash:
- What I was doing when the application crashed:
I delete a multitude (>3000) of spam mails, then Kontact crashed already. Then I did an akonadictl fchk and vacuum. Then I started Kontact again and voila...crash.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f6a4551ca40 (LWP 3038))]

Thread 26 (Thread 0x7f6921beb700 (LWP 18868)):
#0  0x00007f6a553f97ec in read () from /lib64/libc.so.6
#1  0x00007f6a539cc3bf in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f6a5398585e in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f6a53985cd2 in ?? () from /usr/lib64/libglib-2.0.so.0
#4  0x00007f6a53985e4f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#5  0x00007f6a559b6ceb in QEventDispatcherGlib::processEvents (this=0x7f695c0097f0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f6a5595f2eb in QEventLoop::exec (this=this@entry=0x7f6921beab60, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#7  0x00007f6a55797f91 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#8  0x00007f6a55799112 in QThreadPrivate::start (arg=0x560fee232900) at thread/qthread_unix.cpp:360
#9  0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#10 0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 25 (Thread 0x7f692b7fe700 (LWP 18867)):
#0  0x00007f6a5440616c in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f6a4d8bf646 in base::ConditionVariable::TimedWait () at ./../../3rdparty/chromium/base/synchronization/condition_variable_posix.cc:127
#2  0x00007f6a4d8c0013 in base::WaitableEvent::TimedWaitUntil () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:230
#3  0x00007f6a4d8c0191 in base::WaitableEvent::TimedWait () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:162
#4  0x00007f6a4d878451 in base::internal::SchedulerWorker::Delegate::WaitForWork () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:37
#5  0x00007f6a4d87b2ed in base::internal::SchedulerWorker::RunWorker () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:303
#6  0x00007f6a4d87b9e4 in base::internal::SchedulerWorker::RunPooledWorker () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:229
#7  0x00007f6a4d8c2485 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:81
#8  0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#9  0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 24 (Thread 0x7f6923fff700 (LWP 18856)):
#0  0x00007f6a5440616c in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f6a4d8bf646 in base::ConditionVariable::TimedWait () at ./../../3rdparty/chromium/base/synchronization/condition_variable_posix.cc:127
#2  0x00007f6a4d8c0013 in base::WaitableEvent::TimedWaitUntil () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:230
#3  0x00007f6a4d8c0191 in base::WaitableEvent::TimedWait () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:162
#4  0x00007f6a4d878451 in base::internal::SchedulerWorker::Delegate::WaitForWork () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:37
#5  0x00007f6a4d87b63b in base::internal::SchedulerWorker::RunWorker () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:331
#6  0x00007f6a4d87b9e4 in base::internal::SchedulerWorker::RunPooledWorker () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:229
#7  0x00007f6a4d8c2485 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:81
#8  0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#9  0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 23 (Thread 0x7f695b7fe700 (LWP 18847)):
#0  0x00007f6a5440616c in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f6a4d8bf646 in base::ConditionVariable::TimedWait () at ./../../3rdparty/chromium/base/synchronization/condition_variable_posix.cc:127
#2  0x00007f6a4d8c0013 in base::WaitableEvent::TimedWaitUntil () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:230
#3  0x00007f6a4d8c0191 in base::WaitableEvent::TimedWait () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:162
#4  0x00007f6a4d878451 in base::internal::SchedulerWorker::Delegate::WaitForWork () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:37
#5  0x00007f6a4d87b2ed in base::internal::SchedulerWorker::RunWorker () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:303
#6  0x00007f6a4d87b9e4 in base::internal::SchedulerWorker::RunPooledWorker () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:229
#7  0x00007f6a4d8c2485 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:81
#8  0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#9  0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 22 (Thread 0x7f69223ec700 (LWP 17173)):
#0  0x00007f6a5440616c in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f6a4d8bf646 in base::ConditionVariable::TimedWait () at ./../../3rdparty/chromium/base/synchronization/condition_variable_posix.cc:127
#2  0x00007f6a4d8c0013 in base::WaitableEvent::TimedWaitUntil () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:230
#3  0x00007f6a4d8c0191 in base::WaitableEvent::TimedWait () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:162
#4  0x00007f6a4d878451 in base::internal::SchedulerWorker::Delegate::WaitForWork () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:37
#5  0x00007f6a4d87b63b in base::internal::SchedulerWorker::RunWorker () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:331
#6  0x00007f6a4d87b9e4 in base::internal::SchedulerWorker::RunPooledWorker () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:229
#7  0x00007f6a4d8c2485 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:81
#8  0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#9  0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 21 (Thread 0x7f6922ffd700 (LWP 12007)):
#0  0x00007f6a553fdc9f in poll () from /lib64/libc.so.6
#1  0x00007f6a53985d2e in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f6a53985e4f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f6a559b6ceb in QEventDispatcherGlib::processEvents (this=0x7f69f8004bb0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f6a5595f2eb in QEventLoop::exec (this=this@entry=0x7f6922ffcb60, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007f6a55797f91 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007f6a55799112 in QThreadPrivate::start (arg=0x560ff03c04a0) at thread/qthread_unix.cpp:360
#7  0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#8  0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 20 (Thread 0x7f692bfff700 (LWP 3148)):
#0  0x00007f6a54405e05 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f6a4d8bf54c in base::ConditionVariable::Wait () at ./../../3rdparty/chromium/base/synchronization/condition_variable_posix.cc:75
#2  0x00007f6a4d8c0020 in base::WaitableEvent::TimedWaitUntil () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:232
#3  0x00007f6a4d8c014f in base::WaitableEvent::Wait () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:155
#4  0x00007f6a4d878426 in base::internal::SchedulerWorker::Delegate::WaitForWork () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:35
#5  0x00007f6a4d87b63b in base::internal::SchedulerWorker::RunWorker () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:331
#6  0x00007f6a4d87ba24 in base::internal::SchedulerWorker::RunSharedWorker () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:241
#7  0x00007f6a4d8c2485 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:81
#8  0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#9  0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 19 (Thread 0x7f6944d1d700 (LWP 3123)):
#0  0x00007f6a55415acc in __lll_lock_wait_private () from /lib64/libc.so.6
#1  0x00007f6a553781fc in buffered_vfprintf () from /lib64/libc.so.6
#2  0x00007f6a55375384 in __vfprintf_internal () from /lib64/libc.so.6
#3  0x00007f6a5541762f in __fprintf_chk () from /lib64/libc.so.6
#4  0x00007f6a49c251ce in event_logv_ () from /usr/lib64/libevent-2.1.so.6
#5  0x00007f6a49c25395 in event_warn () from /usr/lib64/libevent-2.1.so.6
#6  0x00007f6a49c26d88 in ?? () from /usr/lib64/libevent-2.1.so.6
#7  0x00007f6a49c1cf25 in event_base_loop () from /usr/lib64/libevent-2.1.so.6
#8  0x00007f6a4d8c632a in base::MessagePumpLibevent::Run () at ./../../3rdparty/chromium/base/message_loop/message_pump_libevent.cc:237
#9  0x00007f6a4d8525b7 in base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:150
#10 base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:121
#11 0x00007f6a4d88960f in base::Thread::Run () at ./../../3rdparty/chromium/base/threading/thread.cc:251
#12 base::Thread::ThreadMain () at ./../../3rdparty/chromium/base/threading/thread.cc:333
#13 0x00007f6a4d8c2485 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:81
#14 0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#15 0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 18 (Thread 0x7f6946f4c700 (LWP 3095)):
#0  0x00007f6a553fdc9f in poll () from /lib64/libc.so.6
#1  0x00007f6a53985d2e in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f6a53985e4f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f6a559b6ceb in QEventDispatcherGlib::processEvents (this=0x7f6938000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f6a5595f2eb in QEventLoop::exec (this=this@entry=0x7f6946f4bb60, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007f6a55797f91 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007f6a55799112 in QThreadPrivate::start (arg=0x560fee4d4230) at thread/qthread_unix.cpp:360
#7  0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#8  0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 17 (Thread 0x7f694774d700 (LWP 3093)):
#0  0x00007f6a539d0889 in g_mutex_lock () from /usr/lib64/libglib-2.0.so.0
#1  0x00007f6a539858c6 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f6a53985dc0 in ?? () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f6a53985e4f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#4  0x00007f6a559b6ceb in QEventDispatcherGlib::processEvents (this=0x7f6934000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f6a5595f2eb in QEventLoop::exec (this=this@entry=0x7f694774cb60, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#6  0x00007f6a55797f91 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#7  0x00007f6a55799112 in QThreadPrivate::start (arg=0x560fee4d4280) at thread/qthread_unix.cpp:360
#8  0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#9  0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 16 (Thread 0x7f6947fff700 (LWP 3079)):
#0  0x00007f6a553f97ec in read () from /lib64/libc.so.6
#1  0x00007f6a539cc3bf in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f6a5398585e in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f6a53985cd2 in ?? () from /usr/lib64/libglib-2.0.so.0
#4  0x00007f6a53985e4f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#5  0x00007f6a559b6ceb in QEventDispatcherGlib::processEvents (this=0x7f693c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f6a5595f2eb in QEventLoop::exec (this=this@entry=0x7f6947ffeb60, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#7  0x00007f6a55797f91 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#8  0x00007f6a55799112 in QThreadPrivate::start (arg=0x560fee32e360) at thread/qthread_unix.cpp:360
#9  0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#10 0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 15 (Thread 0x7f69590c0700 (LWP 3077)):
#0  0x00007f6a539851ef in g_main_context_prepare () from /usr/lib64/libglib-2.0.so.0
#1  0x00007f6a53985c5b in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f6a53985e4f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f6a559b6ceb in QEventDispatcherGlib::processEvents (this=0x7f694c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f6a5595f2eb in QEventLoop::exec (this=this@entry=0x7f69590bfb60, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007f6a55797f91 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007f6a55799112 in QThreadPrivate::start (arg=0x560fee341370) at thread/qthread_unix.cpp:360
#7  0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#8  0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 14 (Thread 0x7f695bfff700 (LWP 3064)):
#0  0x00007f6a54405e05 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f6a4d8bf54c in base::ConditionVariable::Wait () at ./../../3rdparty/chromium/base/synchronization/condition_variable_posix.cc:75
#2  0x00007f6a4d8c0020 in base::WaitableEvent::TimedWaitUntil () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:232
#3  0x00007f6a4d8c014f in base::WaitableEvent::Wait () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:155
#4  0x00007f6a4d878426 in base::internal::SchedulerWorker::Delegate::WaitForWork () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:35
#5  0x00007f6a4d87b63b in base::internal::SchedulerWorker::RunWorker () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:331
#6  0x00007f6a4d87ba64 in base::internal::SchedulerWorker::RunDedicatedWorker () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:253
#7  0x00007f6a4d8c2485 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:81
#8  0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#9  0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 13 (Thread 0x7f6a00be9700 (LWP 3063)):
#0  0x00007f6a55415acc in __lll_lock_wait_private () from /lib64/libc.so.6
#1  0x00007f6a553781fc in buffered_vfprintf () from /lib64/libc.so.6
#2  0x00007f6a55375384 in __vfprintf_internal () from /lib64/libc.so.6
#3  0x00007f6a5541762f in __fprintf_chk () from /lib64/libc.so.6
#4  0x00007f6a49c251ce in event_logv_ () from /usr/lib64/libevent-2.1.so.6
#5  0x00007f6a49c25395 in event_warn () from /usr/lib64/libevent-2.1.so.6
#6  0x00007f6a49c26d88 in ?? () from /usr/lib64/libevent-2.1.so.6
#7  0x00007f6a49c1cf25 in event_base_loop () from /usr/lib64/libevent-2.1.so.6
#8  0x00007f6a4d8c62d8 in base::MessagePumpLibevent::Run () at ./../../3rdparty/chromium/base/message_loop/message_pump_libevent.cc:214
#9  0x00007f6a4d8525b7 in base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:150
#10 base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:121
#11 0x00007f6a4d88960f in base::Thread::Run () at ./../../3rdparty/chromium/base/threading/thread.cc:251
#12 base::Thread::ThreadMain () at ./../../3rdparty/chromium/base/threading/thread.cc:333
#13 0x00007f6a4d8c2485 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:81
#14 0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#15 0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 12 (Thread 0x7f6a01ffb700 (LWP 3061)):
#0  0x00007f6a54405e05 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f6a4a03e1ea in ?? () from /usr/lib64/libQt5Script.so.5
#2  0x00007f6a4a03e20b in ?? () from /usr/lib64/libQt5Script.so.5
#3  0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#4  0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 11 (Thread 0x7f6a027fc700 (LWP 3060)):
#0  0x00007f6a553fdc9f in poll () from /lib64/libc.so.6
#1  0x00007f6a246c20f2 in ?? () from /usr/lib64/libpulse.so.0
#2  0x00007f6a246b38b9 in pa_mainloop_poll () from /usr/lib64/libpulse.so.0
#3  0x00007f6a246b3f3f in pa_mainloop_iterate () from /usr/lib64/libpulse.so.0
#4  0x00007f6a246b3ff0 in pa_mainloop_run () from /usr/lib64/libpulse.so.0
#5  0x00007f6a246c2039 in ?? () from /usr/lib64/libpulse.so.0
#6  0x00007f6a2465edb8 in ?? () from /usr/lib64/pulseaudio/libpulsecommon-12.2.so
#7  0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#8  0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 10 (Thread 0x7f6a037fe700 (LWP 3058)):
#0  0x00007f6a54405e05 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f6a4d8bf54c in base::ConditionVariable::Wait () at ./../../3rdparty/chromium/base/synchronization/condition_variable_posix.cc:75
#2  0x00007f6a4d8c0020 in base::WaitableEvent::TimedWaitUntil () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:232
#3  0x00007f6a4d8c014f in base::WaitableEvent::Wait () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:155
#4  0x00007f6a4d82ffce in base::MessagePumpDefault::Run () at ./../../3rdparty/chromium/base/message_loop/message_pump_default.cc:58
#5  0x00007f6a4d8525b7 in base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:150
#6  base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:121
#7  0x00007f6a4d88960f in base::Thread::Run () at ./../../3rdparty/chromium/base/threading/thread.cc:251
#8  base::Thread::ThreadMain () at ./../../3rdparty/chromium/base/threading/thread.cc:333
#9  0x00007f6a4d8c2485 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:81
#10 0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#11 0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 9 (Thread 0x7f6a03fff700 (LWP 3057)):
#0  0x00007f6a54405e05 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f6a4d8bf54c in base::ConditionVariable::Wait () at ./../../3rdparty/chromium/base/synchronization/condition_variable_posix.cc:75
#2  0x00007f6a4e2f0698 in cc::SingleThreadTaskGraphRunner::Run () at ./../../3rdparty/chromium/cc/raster/single_thread_task_graph_runner.cc:126
#3  0x00007f6a4d88ed4d in base::SimpleThread::ThreadMain () at ./../../3rdparty/chromium/base/threading/simple_thread.cc:80
#4  0x00007f6a4d8c2485 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:81
#5  0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#6  0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 8 (Thread 0x7f6a24ff9700 (LWP 3055)):
#0  0x00007f6a55415acc in __lll_lock_wait_private () from /lib64/libc.so.6
#1  0x00007f6a553781fc in buffered_vfprintf () from /lib64/libc.so.6
#2  0x00007f6a55375384 in __vfprintf_internal () from /lib64/libc.so.6
#3  0x00007f6a5541762f in __fprintf_chk () from /lib64/libc.so.6
#4  0x00007f6a49c251ce in event_logv_ () from /usr/lib64/libevent-2.1.so.6
#5  0x00007f6a49c25395 in event_warn () from /usr/lib64/libevent-2.1.so.6
#6  0x00007f6a49c26d88 in ?? () from /usr/lib64/libevent-2.1.so.6
#7  0x00007f6a49c1cf25 in event_base_loop () from /usr/lib64/libevent-2.1.so.6
#8  0x00007f6a4d8c632a in base::MessagePumpLibevent::Run () at ./../../3rdparty/chromium/base/message_loop/message_pump_libevent.cc:237
#9  0x00007f6a4d8525b7 in base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:150
#10 base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:121
#11 0x00007f6a4cd99154 in content::BrowserProcessSubThread::IOThreadRun () at ../../3rdparty/chromium/content/browser/browser_process_sub_thread.cc:174
#12 0x00007f6a4d889788 in base::Thread::ThreadMain () at ./../../3rdparty/chromium/base/threading/thread.cc:333
#13 0x00007f6a4d8c2485 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:81
#14 0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#15 0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 7 (Thread 0x7f6a26ffd700 (LWP 3052)):
#0  0x00007f6a553f988f in write () from /lib64/libc.so.6
#1  0x00007f6a5538b565 in _IO_file_write@@GLIBC_2.2.5 () from /lib64/libc.so.6
#2  0x00007f6a5538a8f6 in new_do_write () from /lib64/libc.so.6
#3  0x00007f6a5538bc6e in __GI__IO_file_xsputn () from /lib64/libc.so.6
#4  0x00007f6a55378259 in buffered_vfprintf () from /lib64/libc.so.6
#5  0x00007f6a55375384 in __vfprintf_internal () from /lib64/libc.so.6
#6  0x00007f6a5541762f in __fprintf_chk () from /lib64/libc.so.6
#7  0x00007f6a49c251ce in event_logv_ () from /usr/lib64/libevent-2.1.so.6
#8  0x00007f6a49c25395 in event_warn () from /usr/lib64/libevent-2.1.so.6
#9  0x00007f6a49c26d88 in ?? () from /usr/lib64/libevent-2.1.so.6
#10 0x00007f6a49c1cf25 in event_base_loop () from /usr/lib64/libevent-2.1.so.6
#11 0x00007f6a4d8c632a in base::MessagePumpLibevent::Run () at ./../../3rdparty/chromium/base/message_loop/message_pump_libevent.cc:237
#12 0x00007f6a4d8525b7 in base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:150
#13 base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:121
#14 0x00007f6a4d88960f in base::Thread::Run () at ./../../3rdparty/chromium/base/threading/thread.cc:251
#15 base::Thread::ThreadMain () at ./../../3rdparty/chromium/base/threading/thread.cc:333
#16 0x00007f6a4d8c2485 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:81
#17 0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#18 0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7f6a39d29700 (LWP 3044)):
#0  0x00007f6a5440616c in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f6a4d8bf646 in base::ConditionVariable::TimedWait () at ./../../3rdparty/chromium/base/synchronization/condition_variable_posix.cc:127
#2  0x00007f6a4d8c0013 in base::WaitableEvent::TimedWaitUntil () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:230
#3  0x00007f6a4d8c0191 in base::WaitableEvent::TimedWait () at ./../../3rdparty/chromium/base/synchronization/waitable_event_posix.cc:162
#4  0x00007f6a4d878451 in base::internal::SchedulerWorker::Delegate::WaitForWork () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:37
#5  0x00007f6a4d87b63b in base::internal::SchedulerWorker::RunWorker () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:331
#6  0x00007f6a4d87b9e4 in base::internal::SchedulerWorker::RunPooledWorker () at ./../../3rdparty/chromium/base/task/task_scheduler/scheduler_worker.cc:229
#7  0x00007f6a4d8c2485 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:81
#8  0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#9  0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7f6a3a52a700 (LWP 3043)):
#0  0x00007f6a544048b4 in pthread_rwlock_rdlock () from /lib64/libpthread.so.0
#1  0x00007f6a55340e5d in __dcigettext () from /lib64/libc.so.6
#2  0x00007f6a55397f0e in strerror_r () from /lib64/libc.so.6
#3  0x00007f6a55397e2f in strerror () from /lib64/libc.so.6
#4  0x00007f6a49c25382 in event_warn () from /usr/lib64/libevent-2.1.so.6
#5  0x00007f6a49c26d88 in ?? () from /usr/lib64/libevent-2.1.so.6
#6  0x00007f6a49c1cf25 in event_base_loop () from /usr/lib64/libevent-2.1.so.6
#7  0x00007f6a4d8c63fa in base::MessagePumpLibevent::Run () at ./../../3rdparty/chromium/base/message_loop/message_pump_libevent.cc:247
#8  0x00007f6a4d8525b7 in base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:150
#9  base::RunLoop::Run () at ./../../3rdparty/chromium/base/run_loop.cc:121
#10 0x00007f6a4d881604 in base::internal::ServiceThread::Run () at ./../../3rdparty/chromium/base/task/task_scheduler/service_thread.cc:61
#11 0x00007f6a4d889788 in base::Thread::ThreadMain () at ./../../3rdparty/chromium/base/threading/thread.cc:333
#12 0x00007f6a4d8c2485 in ThreadFunc () at ./../../3rdparty/chromium/base/threading/platform_thread_posix.cc:81
#13 0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#14 0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7f6a40c9f700 (LWP 3042)):
#0  0x00007f6a53982d27 in ?? () from /usr/lib64/libglib-2.0.so.0
#1  0x00007f6a5398566f in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f6a53985cd2 in ?? () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f6a53985e4f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#4  0x00007f6a559b6ceb in QEventDispatcherGlib::processEvents (this=0x7f6a30000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f6a5595f2eb in QEventLoop::exec (this=this@entry=0x7f6a40c9eb30, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#6  0x00007f6a55797f91 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#7  0x00007f6a54e0a4f6 in ?? () from /usr/lib64/libQt5DBus.so.5
#8  0x00007f6a55799112 in QThreadPrivate::start (arg=0x7f6a54e8cd80) at thread/qthread_unix.cpp:360
#9  0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#10 0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f6a41885700 (LWP 3041)):
#0  0x00007f6a54405e05 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f6a41b7c33b in ?? () from /usr/lib64/dri/i965_dri.so
#2  0x00007f6a41b7bf57 in ?? () from /usr/lib64/dri/i965_dri.so
#3  0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#4  0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f6a43546700 (LWP 3040)):
#0  0x00007f6a553fdc9f in poll () from /lib64/libc.so.6
#1  0x00007f6a5442ccc2 in ?? () from /usr/lib64/libxcb.so.1
#2  0x00007f6a5442e8ba in xcb_wait_for_event () from /usr/lib64/libxcb.so.1
#3  0x00007f6a436a8f48 in QXcbEventQueue::run (this=0x560fedc3d590) at qxcbeventqueue.cpp:228
#4  0x00007f6a55799112 in QThreadPrivate::start (arg=0x560fedc3d590) at thread/qthread_unix.cpp:360
#5  0x00007f6a543fffaa in start_thread () from /lib64/libpthread.so.0
#6  0x00007f6a5540871f in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f6a4551ca40 (LWP 3038)):
[KCrash Handler]
#6  QtWebEngineCore::URLRequestNotification::notify (this=0x7f6a0820a810) at /usr/src/debug/libqt5-qtwebengine-5.13.0-1.1.x86_64/src/core/net/url_request_notification.cpp:112
#7  0x00007f6a4d811afb in base::OnceCallback<void ()>::Run() && () at ../../3rdparty/chromium/base/callback.h:99
#8  base::debug::TaskAnnotator::RunTask () at ./../../3rdparty/chromium/base/debug/task_annotator.cc:105
#9  0x00007f6a4d82e327 in base::MessageLoopImpl::RunTask () at ./../../3rdparty/chromium/base/message_loop/message_loop_impl.cc:355
#10 0x00007f6a4d82f4de in base::MessageLoopImpl::DeferOrRunPendingTask () at ./../../3rdparty/chromium/base/message_loop/message_loop_impl.cc:366
#11 0x00007f6a4d82f7ac in base::MessageLoopImpl::DoWork () at ./../../3rdparty/chromium/base/message_loop/message_loop_impl.cc:458
#12 0x00007f6a4b4bdf81 in QtWebEngineCore::MessagePumpForUIQt::handleScheduledWork (this=0x560fee103530) at /usr/src/debug/libqt5-qtwebengine-5.13.0-1.1.x86_64/src/core/browser_main_parts_qt.cpp:197
#13 QtWebEngineCore::MessagePumpForUIQt::MessagePumpForUIQt()::{lambda()#1}::operator()() const (__closure=<optimized out>) at /usr/src/debug/libqt5-qtwebengine-5.13.0-1.1.x86_64/src/core/browser_main_parts_qt.cpp:114
#14 std::_Function_handler<void (), QtWebEngineCore::MessagePumpForUIQt::MessagePumpForUIQt()::{lambda()#1}>::_M_invoke(std::_Any_data const&) (__functor=...) at /usr/include/c++/9/bits/std_function.h:300
#15 0x00007f6a5598c255 in QObject::event (this=0x560fee103540, e=<optimized out>) at kernel/qobject.cpp:1282
#16 0x00007f6a56390c42 in QApplicationPrivate::notify_helper (this=this@entry=0x560fedc1b9f0, receiver=receiver@entry=0x560fee103540, e=e@entry=0x7f6a081b2da0) at kernel/qapplication.cpp:3740
#17 0x00007f6a56399ec0 in QApplication::notify (this=0x7ffcc45f68b0, receiver=0x560fee103540, e=0x7f6a081b2da0) at kernel/qapplication.cpp:3486
#18 0x00007f6a55960692 in QCoreApplication::notifyInternal2 (receiver=0x560fee103540, event=0x7f6a081b2da0) at ../../include/QtCore/../../src/corelib/kernel/qobject.h:142
#19 0x00007f6a55963328 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x560fedc1a8c0) at kernel/qcoreapplication.cpp:1810
#20 0x00007f6a559b7693 in postEventSourceDispatch (s=0x560fedce9570) at kernel/qeventdispatcher_glib.cpp:277
#21 0x00007f6a53985b33 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#22 0x00007f6a53985dc0 in ?? () from /usr/lib64/libglib-2.0.so.0
#23 0x00007f6a53985e4f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#24 0x00007f6a559b6cd1 in QEventDispatcherGlib::processEvents (this=0x560fedcf6610, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#25 0x00007f6a5595f2eb in QEventLoop::exec (this=this@entry=0x7ffcc45f6780, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#26 0x00007f6a55966e62 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#27 0x0000560febea86ef in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/kontact-19.04.2-87.3.x86_64/src/main.cpp:229
[Inferior 1 (process 3038) detached]

Reported using DrKonqi