Application: kmail (5.5.2)

Qt Version: 5.6.2
Frameworks Version: 5.32.0
Operating System: Linux 4.13.4-2.g80338f6-default x86_64
Distribution: "openSUSE Leap 42.3"

-- Information about the crash:
- What I was doing when the application crashed:
I just tried to start kmail instead of kontact. It showed only the crashreport.
Same bug like 385374 ?

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 0x7fa4ccb0a940 (LWP 23034))]

Thread 24 (Thread 0x7fa442ffc700 (LWP 23070)):
#0  0x00007fa4bf9c20bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fa4b6b23189 in base::SequencedWorkerPool::Inner::ThreadLoop(base::SequencedWorkerPool::Worker*) () from /usr/lib64/libQt5WebEngineCore.so.5
#2  0x00007fa4b6b2394d in base::SequencedWorkerPool::Worker::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#3  0x00007fa4b6b24170 in base::SimpleThread::ThreadMain() () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fa4b6b20ece in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#6  0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 23 (Thread 0x7fa4437fd700 (LWP 23066)):
#0  0x00007fa4bf9c20bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fa4b697ed10 in mojo::system::Waiter::Wait(unsigned long, unsigned int*) () from /usr/lib64/libQt5WebEngineCore.so.5
#2  0x00007fa4b696c7bb in mojo::system::Core::WaitManyInternal(unsigned int const*, unsigned int const*, unsigned int, unsigned long, unsigned int*, mojo::system::HandleSignalsState*) () from /usr/lib64/libQt5WebEngineCore.so.5
#3  0x00007fa4b696ca35 in mojo::system::Core::WaitMany(mojo::system::UserPointer<unsigned int const>, mojo::system::UserPointer<unsigned int const>, unsigned int, unsigned long, mojo::system::UserPointer<unsigned int>, mojo::system::UserPointer<MojoHandleSignalsState>) () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fa4b6969327 in MojoWaitMany () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fa4b82441ca in mojo::common::MessagePumpMojo::DoInternalWork(mojo::common::MessagePumpMojo::RunState const&, bool) () from /usr/lib64/libQt5WebEngineCore.so.5
#6  0x00007fa4b82444e1 in mojo::common::MessagePumpMojo::DoRunLoop(mojo::common::MessagePumpMojo::RunState*, base::MessagePump::Delegate*) () from /usr/lib64/libQt5WebEngineCore.so.5
#7  0x00007fa4b82445d2 in mojo::common::MessagePumpMojo::Run(base::MessagePump::Delegate*) () from /usr/lib64/libQt5WebEngineCore.so.5
#8  0x00007fa4b6b0cc12 in base::RunLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#9  0x00007fa4b6af86b5 in base::MessageLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#10 0x00007fa4b6b244f0 in base::Thread::ThreadMain() () from /usr/lib64/libQt5WebEngineCore.so.5
#11 0x00007fa4b6b20ece in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib64/libQt5WebEngineCore.so.5
#12 0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#13 0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 22 (Thread 0x7fa443ffe700 (LWP 23065)):
#0  0x00007fa4bf9c20bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fa4b6b23189 in base::SequencedWorkerPool::Inner::ThreadLoop(base::SequencedWorkerPool::Worker*) () from /usr/lib64/libQt5WebEngineCore.so.5
#2  0x00007fa4b6b2394d in base::SequencedWorkerPool::Worker::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#3  0x00007fa4b6b24170 in base::SimpleThread::ThreadMain() () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fa4b6b20ece in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#6  0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 21 (Thread 0x7fa45cff9700 (LWP 23064)):
#0  0x00007fa4af14a4f2 in pa_mainloop_prepare () from /usr/lib64/libpulse.so.0
#1  0x00007fa4af14add2 in pa_mainloop_iterate () from /usr/lib64/libpulse.so.0
#2  0x00007fa4af14ae90 in pa_mainloop_run () from /usr/lib64/libpulse.so.0
#3  0x00007fa4af159006 in ?? () from /usr/lib64/libpulse.so.0
#4  0x00007fa4a9eb7408 in ?? () from /usr/lib64/pulseaudio/libpulsecommon-9.0.so
#5  0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#6  0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 20 (Thread 0x7fa45d7fa700 (LWP 23063)):
#0  0x00007fa4bf9c20bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fa4b6b19cbf in base::WaitableEvent::TimedWait(base::TimeDelta const&) () from /usr/lib64/libQt5WebEngineCore.so.5
#2  0x00007fa4b6b19d94 in base::WaitableEvent::Wait() () from /usr/lib64/libQt5WebEngineCore.so.5
#3  0x00007fa4b6afc62b in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fa4b6b0cc12 in base::RunLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fa4b6af86b5 in base::MessageLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#6  0x00007fa4b6b244f0 in base::Thread::ThreadMain() () from /usr/lib64/libQt5WebEngineCore.so.5
#7  0x00007fa4b6b20ece in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib64/libQt5WebEngineCore.so.5
#8  0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#9  0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 19 (Thread 0x7fa45dffb700 (LWP 23062)):
#0  0x00007fa4bf9c20bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fa4b651f979 in cc::TaskGraphRunner::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#2  0x00007fa4b6b24170 in base::SimpleThread::ThreadMain() () from /usr/lib64/libQt5WebEngineCore.so.5
#3  0x00007fa4b6b20ece in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#5  0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 18 (Thread 0x7fa45e7fc700 (LWP 23061)):
#0  0x00007fa4bf9c20bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fa4b6b19cbf in base::WaitableEvent::TimedWait(base::TimeDelta const&) () from /usr/lib64/libQt5WebEngineCore.so.5
#2  0x00007fa4b6b19d94 in base::WaitableEvent::Wait() () from /usr/lib64/libQt5WebEngineCore.so.5
#3  0x00007fa4b6afc62b in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fa4b6b0cc12 in base::RunLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fa4b6af86b5 in base::MessageLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#6  0x00007fa4b6b244f0 in base::Thread::ThreadMain() () from /usr/lib64/libQt5WebEngineCore.so.5
#7  0x00007fa4b6b20ece in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib64/libQt5WebEngineCore.so.5
#8  0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#9  0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 17 (Thread 0x7fa45effd700 (LWP 23060)):
[KCrash Handler]
#6  0x00007fa4c9b968d7 in raise () from /lib64/libc.so.6
#7  0x00007fa4c9b97caa in abort () from /lib64/libc.so.6
#8  0x00007fa4b6ae1469 in base::debug::BreakDebugger() () from /usr/lib64/libQt5WebEngineCore.so.5
#9  0x00007fa4b6af33b5 in logging::LogMessage::~LogMessage() () from /usr/lib64/libQt5WebEngineCore.so.5
#10 0x00007fa4b69306a5 in crypto::(anonymous namespace)::CrashOnNSSInitFailure() () from /usr/lib64/libQt5WebEngineCore.so.5
#11 0x00007fa4b6930b45 in crypto::(anonymous namespace)::NSSInitSingleton::NSSInitSingleton() () from /usr/lib64/libQt5WebEngineCore.so.5
#12 0x00007fa4b6931020 in crypto::EnsureNSSInit() () from /usr/lib64/libQt5WebEngineCore.so.5
#13 0x00007fa4b602d965 in net::CertDatabase::GetInstance() () from /usr/lib64/libQt5WebEngineCore.so.5
#14 0x00007fa4b5f806ad in net::MultiThreadedCertVerifier::MultiThreadedCertVerifier(net::CertVerifyProc*) () from /usr/lib64/libQt5WebEngineCore.so.5
#15 0x00007fa4b5f65356 in net::CertVerifier::CreateDefault() () from /usr/lib64/libQt5WebEngineCore.so.5
#16 0x00007fa4b571157e in QtWebEngineCore::URLRequestContextGetterQt::generateStorage (this=this@entry=0x108d780) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/core/url_request_context_getter_qt.cpp:222
#17 0x00007fa4b5711c46 in QtWebEngineCore::URLRequestContextGetterQt::generateAllStorage (this=0x108d780) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/core/url_request_context_getter_qt.cpp:198
#18 0x00007fa4b5713f44 in QtWebEngineCore::URLRequestContextGetterQt::GetURLRequestContext (this=0x108d780) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/core/url_request_context_getter_qt.cpp:145
#19 0x00007fa4b6331b37 in content::ChromeAppCacheService::InitializeOnIOThread(base::FilePath const&, content::ResourceContext*, net::URLRequestContextGetter*, scoped_refptr<storage::SpecialStoragePolicy>) () from /usr/lib64/libQt5WebEngineCore.so.5
#20 0x00007fa4b62bf21e in base::internal::Invoker<base::IndexSequence<0ul, 1ul, 2ul, 3ul, 4ul>, base::internal::BindState<base::internal::RunnableAdapter<void (content::ChromeAppCacheService::*)(base::FilePath const&, content::ResourceContext*, net::URLRequestContextGetter*, scoped_refptr<storage::SpecialStoragePolicy>)>, void (content::ChromeAppCacheService*, base::FilePath const&, content::ResourceContext*, net::URLRequestContextGetter*, scoped_refptr<storage::SpecialStoragePolicy>), base::internal::TypeList<content::ChromeAppCacheService*, base::FilePath, content::ResourceContext*, scoped_refptr<net::URLRequestContextGetter>, scoped_refptr<storage::SpecialStoragePolicy> > >, base::internal::TypeList<base::internal::UnwrapTraits<content::ChromeAppCacheService*>, base::internal::UnwrapTraits<base::FilePath>, base::internal::UnwrapTraits<content::ResourceContext*>, base::internal::UnwrapTraits<scoped_refptr<net::URLRequestContextGetter> >, base::internal::UnwrapTraits<scoped_refptr<storage::SpecialStoragePolicy> > >, base::internal::InvokeHelper<false, void, base::internal::RunnableAdapter<void (content::ChromeAppCacheService::*)(base::FilePath const&, content::ResourceContext*, net::URLRequestContextGetter*, scoped_refptr<storage::SpecialStoragePolicy>)>, base::internal::TypeList<content::ChromeAppCacheService* const&, base::FilePath const&, content::ResourceContext* const&, net::URLRequestContextGetter*, storage::SpecialStoragePolicy*> >, void ()>::Run(base::internal::BindStateBase*) () from /usr/lib64/libQt5WebEngineCore.so.5
#21 0x00007fa4b6b4931e in base::debug::TaskAnnotator::RunTask(char const*, char const*, base::PendingTask const&) () from /usr/lib64/libQt5WebEngineCore.so.5
#22 0x00007fa4b6af91d4 in base::MessageLoop::RunTask(base::PendingTask const&) () from /usr/lib64/libQt5WebEngineCore.so.5
#23 0x00007fa4b6af94b1 in base::MessageLoop::DeferOrRunPendingTask(base::PendingTask const&) () from /usr/lib64/libQt5WebEngineCore.so.5
#24 0x00007fa4b6afc1e3 in base::MessageLoop::DoWork() () from /usr/lib64/libQt5WebEngineCore.so.5
#25 0x00007fa4b6ad9880 in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () from /usr/lib64/libQt5WebEngineCore.so.5
#26 0x00007fa4b6b0cc12 in base::RunLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#27 0x00007fa4b6af86b5 in base::MessageLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#28 0x00007fa4b61b1c95 in content::BrowserThreadImpl::IOThreadRun(base::MessageLoop*) () from /usr/lib64/libQt5WebEngineCore.so.5
#29 0x00007fa4b61b1dab in content::BrowserThreadImpl::Run(base::MessageLoop*) () from /usr/lib64/libQt5WebEngineCore.so.5
#30 0x00007fa4b6b244f0 in base::Thread::ThreadMain() () from /usr/lib64/libQt5WebEngineCore.so.5
#31 0x00007fa4b6b20ece in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib64/libQt5WebEngineCore.so.5
#32 0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#33 0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 16 (Thread 0x7fa45f7fe700 (LWP 23059)):
#0  0x00007fa4c9c3f2ed in write () from /lib64/libc.so.6
#1  0x00007fa4c9bd5840 in _IO_new_file_write () from /lib64/libc.so.6
#2  0x00007fa4c9bd4e63 in new_do_write () from /lib64/libc.so.6
#3  0x00007fa4c9bd5e46 in __GI__IO_file_xsputn () from /lib64/libc.so.6
#4  0x00007fa4c9bacb1b in buffered_vfprintf () from /lib64/libc.so.6
#5  0x00007fa4c9ba9e8e in vfprintf () from /lib64/libc.so.6
#6  0x00007fa4c9c59aa3 in __fprintf_chk () from /lib64/libc.so.6
#7  0x00007fa4adb95fdf in ?? () from /usr/lib64/libevent-2.0.so.5
#8  0x00007fa4adb961b7 in event_warn () from /usr/lib64/libevent-2.0.so.5
#9  0x00007fa4adb9a468 in ?? () from /usr/lib64/libevent-2.0.so.5
#10 0x00007fa4adb86477 in event_base_loop () from /usr/lib64/libevent-2.0.so.5
#11 0x00007fa4b6ad984e in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () from /usr/lib64/libQt5WebEngineCore.so.5
#12 0x00007fa4b6b0cc12 in base::RunLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#13 0x00007fa4b6af86b5 in base::MessageLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#14 0x00007fa4b61b1c15 in content::BrowserThreadImpl::CacheThreadRun(base::MessageLoop*) () from /usr/lib64/libQt5WebEngineCore.so.5
#15 0x00007fa4b61b1e0b in content::BrowserThreadImpl::Run(base::MessageLoop*) () from /usr/lib64/libQt5WebEngineCore.so.5
#16 0x00007fa4b6b244f0 in base::Thread::ThreadMain() () from /usr/lib64/libQt5WebEngineCore.so.5
#17 0x00007fa4b6b20ece in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib64/libQt5WebEngineCore.so.5
#18 0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#19 0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 15 (Thread 0x7fa45ffff700 (LWP 23058)):
#0  0x00007fa4bf9c20bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fa4b6b19cbf in base::WaitableEvent::TimedWait(base::TimeDelta const&) () from /usr/lib64/libQt5WebEngineCore.so.5
#2  0x00007fa4b6b19d94 in base::WaitableEvent::Wait() () from /usr/lib64/libQt5WebEngineCore.so.5
#3  0x00007fa4b6afc62b in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fa4b6b0cc12 in base::RunLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fa4b6af86b5 in base::MessageLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#6  0x00007fa4b61b1b95 in content::BrowserThreadImpl::ProcessLauncherThreadRun(base::MessageLoop*) () from /usr/lib64/libQt5WebEngineCore.so.5
#7  0x00007fa4b61b1dfb in content::BrowserThreadImpl::Run(base::MessageLoop*) () from /usr/lib64/libQt5WebEngineCore.so.5
#8  0x00007fa4b6b244f0 in base::Thread::ThreadMain() () from /usr/lib64/libQt5WebEngineCore.so.5
#9  0x00007fa4b6b20ece in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib64/libQt5WebEngineCore.so.5
#10 0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#11 0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 14 (Thread 0x7fa474ff9700 (LWP 23057)):
#0  0x00007fa4bf9c2468 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fa4b6b19562 in base::ConditionVariable::TimedWait(base::TimeDelta const&) () from /usr/lib64/libQt5WebEngineCore.so.5
#2  0x00007fa4b6b26fa6 in base::PosixDynamicThreadPool::WaitForTask() () from /usr/lib64/libQt5WebEngineCore.so.5
#3  0x00007fa4b6b27196 in base::(anonymous namespace)::WorkerThread::ThreadMain() () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fa4b6b20ece in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#6  0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 13 (Thread 0x7fa4757fa700 (LWP 23056)):
#0  0x00007fa4bf9c2468 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fa4b6b19562 in base::ConditionVariable::TimedWait(base::TimeDelta const&) () from /usr/lib64/libQt5WebEngineCore.so.5
#2  0x00007fa4b6b26fa6 in base::PosixDynamicThreadPool::WaitForTask() () from /usr/lib64/libQt5WebEngineCore.so.5
#3  0x00007fa4b6b27196 in base::(anonymous namespace)::WorkerThread::ThreadMain() () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fa4b6b20ece in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#6  0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 12 (Thread 0x7fa475ffb700 (LWP 23055)):
#0  0x00007fa4bf9c20bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fa4b6b19cbf in base::WaitableEvent::TimedWait(base::TimeDelta const&) () from /usr/lib64/libQt5WebEngineCore.so.5
#2  0x00007fa4b6b19d94 in base::WaitableEvent::Wait() () from /usr/lib64/libQt5WebEngineCore.so.5
#3  0x00007fa4b6afc62b in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fa4b6b0cc12 in base::RunLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fa4b6af86b5 in base::MessageLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#6  0x00007fa4b61b1b15 in content::BrowserThreadImpl::FileUserBlockingThreadRun(base::MessageLoop*) () from /usr/lib64/libQt5WebEngineCore.so.5
#7  0x00007fa4b61b1deb in content::BrowserThreadImpl::Run(base::MessageLoop*) () from /usr/lib64/libQt5WebEngineCore.so.5
#8  0x00007fa4b6b244f0 in base::Thread::ThreadMain() () from /usr/lib64/libQt5WebEngineCore.so.5
#9  0x00007fa4b6b20ece in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib64/libQt5WebEngineCore.so.5
#10 0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#11 0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 11 (Thread 0x7fa4767fc700 (LWP 23054)):
#0  0x00007fa4c9c57eab in __lll_lock_wait_private () from /lib64/libc.so.6
#1  0x00007fa4c9c59a46 in __fprintf_chk () from /lib64/libc.so.6
#2  0x00007fa4adb95fdf in ?? () from /usr/lib64/libevent-2.0.so.5
#3  0x00007fa4adb961b7 in event_warn () from /usr/lib64/libevent-2.0.so.5
#4  0x00007fa4adb9a468 in ?? () from /usr/lib64/libevent-2.0.so.5
#5  0x00007fa4adb86477 in event_base_loop () from /usr/lib64/libevent-2.0.so.5
#6  0x00007fa4b6ad984e in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () from /usr/lib64/libQt5WebEngineCore.so.5
#7  0x00007fa4b6b0cc12 in base::RunLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#8  0x00007fa4b6af86b5 in base::MessageLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#9  0x00007fa4b61b1a95 in content::BrowserThreadImpl::FileThreadRun(base::MessageLoop*) () from /usr/lib64/libQt5WebEngineCore.so.5
#10 0x00007fa4b61b1ddb in content::BrowserThreadImpl::Run(base::MessageLoop*) () from /usr/lib64/libQt5WebEngineCore.so.5
#11 0x00007fa4b6b244f0 in base::Thread::ThreadMain() () from /usr/lib64/libQt5WebEngineCore.so.5
#12 0x00007fa4b6b20ece in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib64/libQt5WebEngineCore.so.5
#13 0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#14 0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 10 (Thread 0x7fa476ffd700 (LWP 23053)):
#0  0x00007fa4bf9c20bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fa4b6b19cbf in base::WaitableEvent::TimedWait(base::TimeDelta const&) () from /usr/lib64/libQt5WebEngineCore.so.5
#2  0x00007fa4b6b19d94 in base::WaitableEvent::Wait() () from /usr/lib64/libQt5WebEngineCore.so.5
#3  0x00007fa4b6afc62b in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fa4b6b0cc12 in base::RunLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fa4b6af86b5 in base::MessageLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#6  0x00007fa4b61b1a15 in content::BrowserThreadImpl::DBThreadRun(base::MessageLoop*) () from /usr/lib64/libQt5WebEngineCore.so.5
#7  0x00007fa4b61b1dcb in content::BrowserThreadImpl::Run(base::MessageLoop*) () from /usr/lib64/libQt5WebEngineCore.so.5
#8  0x00007fa4b6b244f0 in base::Thread::ThreadMain() () from /usr/lib64/libQt5WebEngineCore.so.5
#9  0x00007fa4b6b20ece in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib64/libQt5WebEngineCore.so.5
#10 0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#11 0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 9 (Thread 0x7fa4777fe700 (LWP 23052)):
#0  0x00007fa4bf9c20bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fa4b6b19cbf in base::WaitableEvent::TimedWait(base::TimeDelta const&) () from /usr/lib64/libQt5WebEngineCore.so.5
#2  0x00007fa4b6b19d94 in base::WaitableEvent::Wait() () from /usr/lib64/libQt5WebEngineCore.so.5
#3  0x00007fa4b6afc62b in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () from /usr/lib64/libQt5WebEngineCore.so.5
#4  0x00007fa4b6b0cc12 in base::RunLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#5  0x00007fa4b6af86b5 in base::MessageLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#6  0x00007fa4b6b244f0 in base::Thread::ThreadMain() () from /usr/lib64/libQt5WebEngineCore.so.5
#7  0x00007fa4b6b20ece in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib64/libQt5WebEngineCore.so.5
#8  0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#9  0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 8 (Thread 0x7fa477fff700 (LWP 23051)):
#0  0x00007fa4c9c57eab in __lll_lock_wait_private () from /lib64/libc.so.6
#1  0x00007fa4c9c59a46 in __fprintf_chk () from /lib64/libc.so.6
#2  0x00007fa4adb95fdf in ?? () from /usr/lib64/libevent-2.0.so.5
#3  0x00007fa4adb961b7 in event_warn () from /usr/lib64/libevent-2.0.so.5
#4  0x00007fa4adb9a468 in ?? () from /usr/lib64/libevent-2.0.so.5
#5  0x00007fa4adb86477 in event_base_loop () from /usr/lib64/libevent-2.0.so.5
#6  0x00007fa4b6ad984e in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () from /usr/lib64/libQt5WebEngineCore.so.5
#7  0x00007fa4b6b0cc12 in base::RunLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#8  0x00007fa4b6af86b5 in base::MessageLoop::Run() () from /usr/lib64/libQt5WebEngineCore.so.5
#9  0x00007fa4b6b244f0 in base::Thread::ThreadMain() () from /usr/lib64/libQt5WebEngineCore.so.5
#10 0x00007fa4b6b20ece in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib64/libQt5WebEngineCore.so.5
#11 0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#12 0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 7 (Thread 0x7fa48f7fe700 (LWP 23040)):
#0  0x00007fa4c9c4320d in poll () from /lib64/libc.so.6
#1  0x00007fa4bf1a3314 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007fa4bf1a342c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fa4ca5501ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#4  0x00007fa4ca4fdbfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#5  0x00007fa4ca338f5a in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#6  0x00007fa4ca33da29 in ?? () from /usr/lib64/libQt5Core.so.5
#7  0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#8  0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7fa48ffff700 (LWP 23039)):
#0  0x00007fa4c9c4320d in poll () from /lib64/libc.so.6
#1  0x00007fa4bf1a3314 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007fa4bf1a342c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fa4ca5501ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#4  0x00007fa4ca4fdbfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#5  0x00007fa4ca338f5a in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#6  0x00007fa4ca33da29 in ?? () from /usr/lib64/libQt5Core.so.5
#7  0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#8  0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7fa4950ff700 (LWP 23038)):
#0  0x00007fa4bf1e4899 in g_mutex_lock () from /usr/lib64/libglib-2.0.so.0
#1  0x00007fa4bf1a2dac in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#2  0x00007fa4bf1a32a8 in ?? () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fa4bf1a342c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#4  0x00007fa4ca5501ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#5  0x00007fa4ca4fdbfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#6  0x00007fa4ca338f5a in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#7  0x00007fa4ca33da29 in ?? () from /usr/lib64/libQt5Core.so.5
#8  0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#9  0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7fa496310700 (LWP 23037)):
#0  0x00007ffcbedcfb62 in clock_gettime ()
#1  0x00007fa4c9c58576 in clock_gettime () from /lib64/libc.so.6
#2  0x00007fa4ca3e8a46 in ?? () from /usr/lib64/libQt5Core.so.5
#3  0x00007fa4ca54e809 in QTimerInfoList::updateCurrentTime() () from /usr/lib64/libQt5Core.so.5
#4  0x00007fa4ca54ed85 in QTimerInfoList::timerWait(timespec&) () from /usr/lib64/libQt5Core.so.5
#5  0x00007fa4ca54ff7e in ?? () from /usr/lib64/libQt5Core.so.5
#6  0x00007fa4bf1a295d in g_main_context_prepare () from /usr/lib64/libglib-2.0.so.0
#7  0x00007fa4bf1a3230 in ?? () from /usr/lib64/libglib-2.0.so.0
#8  0x00007fa4bf1a342c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#9  0x00007fa4ca5501ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#10 0x00007fa4ca4fdbfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#11 0x00007fa4ca338f5a in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#12 0x00007fa4c8be2295 in ?? () from /usr/lib64/libQt5DBus.so.5
#13 0x00007fa4ca33da29 in ?? () from /usr/lib64/libQt5Core.so.5
#14 0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#15 0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7fa4971ca700 (LWP 23036)):
#0  0x00007fa4bf9c20bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fa4a258eb4b in ?? () from /usr/lib64/dri/r600_dri.so
#2  0x00007fa4a258e8c7 in ?? () from /usr/lib64/dri/r600_dri.so
#3  0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#4  0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7fa4a4272700 (LWP 23035)):
#0  0x00007fa4c9c4320d in poll () from /lib64/libc.so.6
#1  0x00007fa4bce953e2 in ?? () from /usr/lib64/libxcb.so.1
#2  0x00007fa4bce96fcf in xcb_wait_for_event () from /usr/lib64/libxcb.so.1
#3  0x00007fa4a5d550d9 in ?? () from /usr/lib64/libQt5XcbQpa.so.5
#4  0x00007fa4ca33da29 in ?? () from /usr/lib64/libQt5Core.so.5
#5  0x00007fa4bf9bd744 in start_thread () from /lib64/libpthread.so.0
#6  0x00007fa4c9c4baad in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7fa4ccb0a940 (LWP 23034)):
#0  0x00007fa4c9c47659 in syscall () from /lib64/libc.so.6
#1  0x00007fa4ca33616c in QBasicMutex::lockInternal() () from /usr/lib64/libQt5Core.so.5
#2  0x00007fa4ca3364a3 in QMutex::lock() () from /usr/lib64/libQt5Core.so.5
#3  0x00007fa4b571173e in QMutexLocker::QMutexLocker (m=0x108d7c0, this=<synthetic pointer>) at /usr/include/qt5/QtCore/qmutex.h:128
#4  QtWebEngineCore::URLRequestContextGetterQt::updateRequestInterceptor (this=0x108d780) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/core/url_request_context_getter_qt.cpp:385
#5  0x00007fa4b56dc878 in QtWebEngineCore::BrowserContextAdapter::setRequestInterceptor (this=<optimized out>, interceptor=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/core/browser_context_adapter.cpp:154
#6  0x00007fa4baac24a9 in QWebEngineProfile::setRequestInterceptor (this=<optimized out>, interceptor=<optimized out>) at api/qwebengineprofile.cpp:484
#7  0x00007fa4c56c76c5 in WebEngineViewer::InterceptorManager::InterceptorManager(QWebEngineView*, KActionCollection*, QObject*) () from /usr/lib64/libKF5WebEngineViewer.so.5
#8  0x00007fa4c6aac4dd in MessageViewer::MailWebEngineView::MailWebEngineView(KActionCollection*, QWidget*) () from /usr/lib64/libKF5MessageViewer.so.5
#9  0x00007fa4c6a57599 in ?? () from /usr/lib64/libKF5MessageViewer.so.5
#10 0x00007fa4c6a6124f in ?? () from /usr/lib64/libKF5MessageViewer.so.5
#11 0x00007fa4c6a4c4a0 in MessageViewer::Viewer::Viewer(QWidget*, QWidget*, KActionCollection*) () from /usr/lib64/libKF5MessageViewer.so.5
#12 0x00007fa4cc361488 in KMReaderWin::KMReaderWin(QWidget*, QWidget*, KActionCollection*) () from /usr/lib64/libkmailprivate.so.5
#13 0x00007fa4cc3a06d5 in KMMainWidget::createWidgets() () from /usr/lib64/libkmailprivate.so.5
#14 0x00007fa4cc3accf2 in KMMainWidget::KMMainWidget(QWidget*, KXMLGUIClient*, KActionCollection*, QExplicitlySharedDataPointer<KSharedConfig>) () from /usr/lib64/libkmailprivate.so.5
#15 0x00007fa4cc35da14 in KMMainWin::KMMainWin(QWidget*) () from /usr/lib64/libkmailprivate.so.5
#16 0x00007fa4cc36f50c in KMKernel::openReader(bool) () from /usr/lib64/libkmailprivate.so.5
#17 0x00007fa4cc3738a8 in KMKernel::action(bool, bool, QString const&, QString const&, QString const&, QString const&, QString const&, QUrl const&, QList<QUrl> const&, QStringList const&, QString const&, QString const&, QString const&) () from /usr/lib64/libkmailprivate.so.5
#18 0x00007fa4cc375344 in KMKernel::handleCommandLine(bool, QStringList const&, QString const&) () from /usr/lib64/libkmailprivate.so.5
#19 0x0000000000403cd3 in ?? ()
#20 0x0000000000403a90 in ?? ()
#21 0x00007fa4c9b826e5 in __libc_start_main () from /lib64/libc.so.6
#22 0x0000000000403ba9 in _start ()

Reported using DrKonqi