Application: kmail (5.6.3)

Qt Version: 5.9.2
Frameworks Version: 5.40.0
Operating System: Linux 4.14.7-300.fc27.x86_64 x86_64
Distribution (Platform): Fedora RPMs

-- Information about the crash:
Kmail crashes every time 5min after I start it. In this 5min I can do what I like, everything seems to work just fine. But after 5min it crashes...

The crash can be reproduced every time.

-- Backtrace:
Application: KMail (kmail), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb38cb0d340 (LWP 4237))]

Thread 26 (Thread 0x7fb2435f6700 (LWP 4301)):
#0  0x00007fb382376c4b in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fb37984ee85 in base::SequencedWorkerPool::Inner::ThreadLoop(base::SequencedWorkerPool::Worker*) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007fb37984f367 in base::SequencedWorkerPool::Worker::Run() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007fb379850101 in base::SimpleThread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007fb37984c7cb in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#6  0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 25 (Thread 0x7fb2c3fff700 (LWP 4300)):
#0  0x00007fb382376c4b in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fb36783b604 in QTWTF::TCMalloc_PageHeap::scavengerThread() () at /lib64/libQt5Script.so.5
#2  0x00007fb36783b649 in  () at /lib64/libQt5Script.so.5
#3  0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#4  0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 24 (Thread 0x7fb2ca4a3700 (LWP 4287)):
#0  0x00007fb38644a30b in poll () at /lib64/libc.so.6
#1  0x00007fb3711d0ed9 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007fb3711d0fec in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007fb3872b535b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007fb3872630ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007fb3870b48ba in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007fb3870b8b92 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#7  0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#8  0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 23 (Thread 0x7fb300ff9700 (LWP 4275)):
#0  0x00007fb38644a30b in poll () at /lib64/libc.so.6
#1  0x00007fb365d796f1 in poll_func () at /lib64/libpulse.so.0
#2  0x00007fb365d6b0b0 in pa_mainloop_poll () at /lib64/libpulse.so.0
#3  0x00007fb365d6b740 in pa_mainloop_iterate () at /lib64/libpulse.so.0
#4  0x00007fb365d6b7d0 in pa_mainloop_run () at /lib64/libpulse.so.0
#5  0x00007fb365d79639 in thread () at /lib64/libpulse.so.0
#6  0x00007fb3637b3ac8 in internal_thread_func () at /usr/lib64/pulseaudio/libpulsecommon-11.1.so
#7  0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#8  0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 22 (Thread 0x7fb3017fa700 (LWP 4274)):
#0  0x00007fb38644592b in write () at /lib64/libc.so.6
#1  0x00007fb3863c23fd in _IO_new_file_write () at /lib64/libc.so.6
#2  0x00007fb3863c2d9f in __GI__IO_file_xsputn () at /lib64/libc.so.6
#3  0x00007fb386395c17 in buffered_vfprintf () at /lib64/libc.so.6
#4  0x00007fb386392c56 in vfprintf () at /lib64/libc.so.6
#5  0x00007fb386467206 in __fprintf_chk () at /lib64/libc.so.6
#6  0x00007fb36ada63e0 in _warn_helper () at /lib64/libevent-2.0.so.5
#7  0x00007fb36ada65a4 in event_warn () at /lib64/libevent-2.0.so.5
#8  0x00007fb36adaad40 in epoll_dispatch () at /lib64/libevent-2.0.so.5
#9  0x00007fb36ad958de in event_base_loop () at /lib64/libevent-2.0.so.5
#10 0x00007fb37981fcb9 in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#11 0x00007fb37981bf88 in base::MessageLoop::RunHandler() () at /lib64/libQt5WebEngineCore.so.5
#12 0x00007fb3798389cb in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#13 0x00007fb3798506c6 in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#14 0x00007fb37984c7cb in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#15 0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#16 0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 21 (Thread 0x7fb301ffb700 (LWP 4273)):
#0  0x00007fb382376c4b in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fb379844b69 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007fb379844b97 in base::WaitableEvent::Wait() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007fb37981f6bb in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007fb37981bf88 in base::MessageLoop::RunHandler() () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007fb3798389cb in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007fb3798506c6 in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007fb37984c7cb in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 20 (Thread 0x7fb3027fc700 (LWP 4272)):
#0  0x00007fb38237714a in pthread_cond_timedwait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fb37987d8d2 in base::ConditionVariable::TimedWait(base::TimeDelta const&) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007fb379844aee in base::WaitableEvent::TimedWait(base::TimeDelta const&) () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007fb37981f70b in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007fb37981bf88 in base::MessageLoop::RunHandler() () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007fb3798389cb in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007fb3798506c6 in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007fb37984c7cb in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 19 (Thread 0x7fb302ffd700 (LWP 4271)):
#0  0x00007fb382376c4b in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fb379fd1f70 in cc::SingleThreadTaskGraphRunner::Run() () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007fb379850101 in base::SimpleThread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007fb37984c7cb in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#5  0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 18 (Thread 0x7fb3037fe700 (LWP 4270)):
#0  0x00007fb382376c4b in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fb37984ee85 in base::SequencedWorkerPool::Inner::ThreadLoop(base::SequencedWorkerPool::Worker*) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007fb37984f367 in base::SequencedWorkerPool::Worker::Run() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007fb379850101 in base::SimpleThread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007fb37984c7cb in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#6  0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 17 (Thread 0x7fb303fff700 (LWP 4269)):
#0  0x00007fb382376c4b in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fb379844b69 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007fb379844b97 in base::WaitableEvent::Wait() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007fb37981f6bb in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007fb37981bf88 in base::MessageLoop::RunHandler() () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007fb3798389cb in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007fb3798506c6 in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007fb37984c7cb in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 16 (Thread 0x7fb324ff9700 (LWP 4268)):
#0  0x00007fb386370bf6 in __dcigettext () at /lib64/libc.so.6
#1  0x00007fb3863d57a8 in strerror_r () at /lib64/libc.so.6
#2  0x00007fb3863d56cf in strerror () at /lib64/libc.so.6
#3  0x00007fb36ada6591 in event_warn () at /lib64/libevent-2.0.so.5
#4  0x00007fb36adaad40 in epoll_dispatch () at /lib64/libevent-2.0.so.5
#5  0x00007fb36ad958de in event_base_loop () at /lib64/libevent-2.0.so.5
#6  0x00007fb37981fdf3 in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007fb37981bf88 in base::MessageLoop::RunHandler() () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007fb3798389cb in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#9  0x00007fb379120f48 in content::BrowserThreadImpl::IOThreadRun(base::RunLoop*) () at /lib64/libQt5WebEngineCore.so.5
#10 0x00007fb3791214fb in content::BrowserThreadImpl::Run(base::RunLoop*) () at /lib64/libQt5WebEngineCore.so.5
#11 0x00007fb379850778 in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#12 0x00007fb37984c7cb in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#13 0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#14 0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 15 (Thread 0x7fb3257fa700 (LWP 4267)):
#0  0x00007fb382376c4b in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fb379844b69 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007fb379844b97 in base::WaitableEvent::Wait() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007fb37981f6bb in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007fb37981bf88 in base::MessageLoop::RunHandler() () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007fb3798389cb in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007fb379120e98 in content::BrowserThreadImpl::CacheThreadRun(base::RunLoop*) () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007fb3791214eb in content::BrowserThreadImpl::Run(base::RunLoop*) () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007fb379850778 in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#9  0x00007fb37984c7cb in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#10 0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#11 0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 14 (Thread 0x7fb325ffb700 (LWP 4266)):
#0  0x00007fb382376c4b in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fb379844b69 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007fb379844b97 in base::WaitableEvent::Wait() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007fb37981f6bb in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007fb37981bf88 in base::MessageLoop::RunHandler() () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007fb3798389cb in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007fb379120de8 in content::BrowserThreadImpl::ProcessLauncherThreadRun(base::RunLoop*) () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007fb3791214db in content::BrowserThreadImpl::Run(base::RunLoop*) () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007fb379850778 in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#9  0x00007fb37984c7cb in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#10 0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#11 0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 13 (Thread 0x7fb3267fc700 (LWP 4265)):
#0  0x00007fb382376c4b in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fb379844b69 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007fb379844b97 in base::WaitableEvent::Wait() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007fb37981f6bb in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007fb37981bf88 in base::MessageLoop::RunHandler() () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007fb3798389cb in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007fb379120d38 in content::BrowserThreadImpl::FileUserBlockingThreadRun(base::RunLoop*) () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007fb3791214cb in content::BrowserThreadImpl::Run(base::RunLoop*) () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007fb379850778 in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#9  0x00007fb37984c7cb in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#10 0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#11 0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 12 (Thread 0x7fb326ffd700 (LWP 4264)):
#0  0x00007fb37981daef in base::MessageLoop::DoIdleWork() () at /lib64/libQt5WebEngineCore.so.5
#1  0x00007fb37981fced in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007fb37981bf88 in base::MessageLoop::RunHandler() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007fb3798389cb in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007fb379120c88 in content::BrowserThreadImpl::FileThreadRun(base::RunLoop*) () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007fb3791214bb in content::BrowserThreadImpl::Run(base::RunLoop*) () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007fb379850778 in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007fb37984c7cb in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 11 (Thread 0x7fb3277fe700 (LWP 4263)):
#0  0x00007fb382376c4b in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fb379844b69 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007fb379844b97 in base::WaitableEvent::Wait() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007fb37981f6bb in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007fb37981bf88 in base::MessageLoop::RunHandler() () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007fb3798389cb in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007fb379120bd8 in content::BrowserThreadImpl::DBThreadRun(base::RunLoop*) () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007fb3791214ab in content::BrowserThreadImpl::Run(base::RunLoop*) () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007fb379850778 in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#9  0x00007fb37984c7cb in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#10 0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#11 0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 10 (Thread 0x7fb327fff700 (LWP 4262)):
#0  0x00007fb38237714a in pthread_cond_timedwait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fb37987d8d2 in base::ConditionVariable::TimedWait(base::TimeDelta const&) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007fb379853989 in base::PosixDynamicThreadPool::WaitForTask() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007fb379853eeb in base::(anonymous namespace)::WorkerThread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007fb37984c7cb in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#6  0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 9 (Thread 0x7fb334a94700 (LWP 4261)):
#0  0x00007fb38237714a in pthread_cond_timedwait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fb37987d8d2 in base::ConditionVariable::TimedWait(base::TimeDelta const&) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007fb379853989 in base::PosixDynamicThreadPool::WaitForTask() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007fb379853eeb in base::(anonymous namespace)::WorkerThread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007fb37984c7cb in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#6  0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7fb335295700 (LWP 4260)):
#0  0x00007fb382376c4b in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fb379844b69 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007fb379844b97 in base::WaitableEvent::Wait() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007fb37981f6bb in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007fb37981bf88 in base::MessageLoop::RunHandler() () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007fb3798389cb in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007fb3798506c6 in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007fb37984c7cb in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7fb335ca3700 (LWP 4259)):
#0  0x00007fb38649c1bc in __strcmp_ssse3 () at /lib64/libc.so.6
#1  0x00007fb3863734d0 in _nl_make_l10nflist () at /lib64/libc.so.6
#2  0x00007fb386371234 in _nl_find_domain () at /lib64/libc.so.6
#3  0x00007fb386370b25 in __dcigettext () at /lib64/libc.so.6
#4  0x00007fb3863d57a8 in strerror_r () at /lib64/libc.so.6
#5  0x00007fb3863d56cf in strerror () at /lib64/libc.so.6
#6  0x00007fb36ada6591 in event_warn () at /lib64/libevent-2.0.so.5
#7  0x00007fb36adaad40 in epoll_dispatch () at /lib64/libevent-2.0.so.5
#8  0x00007fb36ad958de in event_base_loop () at /lib64/libevent-2.0.so.5
#9  0x00007fb37981fd0d in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#10 0x00007fb37981bf88 in base::MessageLoop::RunHandler() () at /lib64/libQt5WebEngineCore.so.5
#11 0x00007fb3798389cb in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#12 0x00007fb3798506c6 in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#13 0x00007fb37984c7cb in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#14 0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#15 0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7fb34d59f700 (LWP 4243)):
#0  0x00007fb386445888 in read () at /lib64/libc.so.6
#1  0x00007fb3712150e0 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007fb3711d09e8 in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007fb3711d0e80 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007fb3711d0fec in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007fb3872b535b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007fb3872630ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#7  0x00007fb3870b48ba in QThread::exec() () at /lib64/libQt5Core.so.5
#8  0x00007fb3870b8b92 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#10 0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7fb34dda0700 (LWP 4242)):
#0  0x00007fb38646542f in __libc_enable_asynccancel () at /lib64/libc.so.6
#1  0x00007fb38644a2f6 in poll () at /lib64/libc.so.6
#2  0x00007fb3711d0ed9 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007fb3711d0fec in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007fb3872b535b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007fb3872630ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007fb3870b48ba in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007fb3870b8b92 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7fb34ec41700 (LWP 4241)):
#0  0x00007fb38644a30b in poll () at /lib64/libc.so.6
#1  0x00007fb3711d0ed9 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007fb3711d0fec in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007fb3872b535b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007fb3872630ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007fb3870b48ba in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007fb3870b8b92 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#7  0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#8  0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7fb34fe52700 (LWP 4240)):
#0  0x00007fb386445888 in read () at /lib64/libc.so.6
#1  0x00007fb3712150e0 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007fb3711d09e8 in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007fb3711d0e80 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007fb3711d0fec in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007fb3872b535b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007fb3872630ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#7  0x00007fb3870b48ba in QThread::exec() () at /lib64/libQt5Core.so.5
#8  0x00007fb388bbd479 in QDBusConnectionManager::run() () at /lib64/libQt5DBus.so.5
#9  0x00007fb3870b8b92 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#10 0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#11 0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7fb3590f7700 (LWP 4239)):
#0  0x00007fb38644a30b in poll () at /lib64/libc.so.6
#1  0x00007fb370b59fe7 in _xcb_conn_wait () at /lib64/libxcb.so.1
#2  0x00007fb370b5bdda in xcb_wait_for_event () at /lib64/libxcb.so.1
#3  0x00007fb35ade2a49 in QXcbEventReader::run() () at /lib64/libQt5XcbQpa.so.5
#4  0x00007fb3870b8b92 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#5  0x00007fb382370619 in start_thread () at /lib64/libpthread.so.0
#6  0x00007fb3864568bf in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7fb38cb0d340 (LWP 4237)):
[KCrash Handler]
#6  0x00007fb38637666b in raise () at /lib64/libc.so.6
#7  0x00007fb386378381 in abort () at /lib64/libc.so.6
#8  0x00007fb386d20025 in __gnu_cxx::__verbose_terminate_handler() () at /lib64/libstdc++.so.6
#9  0x00007fb386d1dc16 in  () at /lib64/libstdc++.so.6
#10 0x00007fb386d1dc61 in  () at /lib64/libstdc++.so.6
#11 0x00007fb386d1dea4 in  () at /lib64/libstdc++.so.6
#12 0x00007fb36ce5e3ee in GlassTable::set_overwritten() const () at /lib64/libxapian.so.30
#13 0x00007fb36ce60188 in GlassTable::block_to_cursor(Glass::Cursor*, int, unsigned int) const () at /lib64/libxapian.so.30
#14 0x00007fb36ce62e1a in GlassTable::find(Glass::Cursor*) const () at /lib64/libxapian.so.30
#15 0x00007fb36ce63073 in GlassTable::get_exact_entry(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&) const () at /lib64/libxapian.so.30
#16 0x00007fb36ce4ee63 in GlassPostListTable::get_freqs(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, unsigned int*, unsigned int*) const () at /lib64/libxapian.so.30
#17 0x00007fb36cda3ec5 in Xapian::Database::get_termfreq(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const () at /lib64/libxapian.so.30
#18 0x00007fb3815a6feb in Akonadi::Search::PIM::IndexedItemsPrivate::indexedItemsInDatabase(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, QString const&) const () at /lib64/libKF5AkonadiSearchPIM.so.5
#19 0x00007fb3815a72ad in Akonadi::Search::PIM::IndexedItemsPrivate::indexedItems(long long) () at /lib64/libKF5AkonadiSearchPIM.so.5
#20 0x00007fb38c494d94 in CheckIndexingJob::slotCollectionPropertiesFinished(KJob*) () at /lib64/libkmailprivate.so.5
#21 0x00007fb38728cce7 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#22 0x00007fb3885fb2cc in KJob::result(KJob*, KJob::QPrivateSignal) () at /lib64/libKF5CoreAddons.so.5
#23 0x00007fb3885fbe01 in KJob::finishJob(bool) () at /lib64/libKF5CoreAddons.so.5
#24 0x00007fb380a96b29 in Akonadi::Job::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () at /lib64/libKF5AkonadiCore.so.5
#25 0x00007fb38728d91a in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#26 0x00007fb387ecd6ac in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#27 0x00007fb387ed4ef4 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#28 0x00007fb387264367 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#29 0x00007fb387266aeb in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib64/libQt5Core.so.5
#30 0x00007fb3872b5553 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5Core.so.5
#31 0x00007fb3711d0bb7 in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#32 0x00007fb3711d0f60 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#33 0x00007fb3711d0fec in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#34 0x00007fb3872b533f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#35 0x00007fb3872630ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#36 0x00007fb38726b744 in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#37 0x000055c5f112294d in main ()

Reported using DrKonqi