Bug 372948

Summary: crash upon opening large mailbox (552 messages)
Product: [Applications] kmail2 Reporter: pcfe <kde>
Component: generalAssignee: kdepim bugs <kdepim-bugs>
Status: RESOLVED DUPLICATE    
Severity: crash Keywords: drkonqi
Priority: NOR    
Version: unspecified   
Target Milestone: ---   
Platform: Fedora RPMs   
OS: Linux   
Latest Commit: Version Fixed In:

Description pcfe 2016-11-26 11:13:17 UTC 
Application: kmail (5.3.0 (QtWebEngine))

Qt Version: 5.7.0
Frameworks Version: 5.27.0
Operating System: Linux 4.8.8-300.fc25.x86_64 x86_64
Distribution (Platform): Fedora RPMs

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

repeatedly, when I open a mailbox with 552 total, 548 new messages; KMail crashes
other servers/mailbox I can access fine
this did not happen under F24, upgraded to F25 last w-e

The crash can be reproduced every time.

-- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
185	62:	movl	(%rsp), %edi
[Current thread is 1 (Thread 0x7f8243db7940 (LWP 19670))]

Thread 35 (Thread 0x7f819507d700 (LWP 20022)):
#0  0x00007f82592e0460 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f826055fb09 in base::SequencedWorkerPool::Inner::ThreadLoop(base::SequencedWorkerPool::Worker*) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f8260560109 in base::SequencedWorkerPool::Worker::Run() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f82605602c0 in base::SimpleThread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f826055cc5c in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f82592da6ca in start_thread (arg=0x7f819507d700) at pthread_create.c:333
#6  0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 34 (Thread 0x7f81977fe700 (LWP 20021)):
#0  0x00007f82592e0460 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f826055fb09 in base::SequencedWorkerPool::Inner::ThreadLoop(base::SequencedWorkerPool::Worker*) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f8260560109 in base::SequencedWorkerPool::Worker::Run() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f82605602c0 in base::SimpleThread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f826055cc5c in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f82592da6ca in start_thread (arg=0x7f81977fe700) at pthread_create.c:333
#6  0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 33 (Thread 0x7f8196909700 (LWP 20019)):
#0  0x00007f82592e0460 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f824d0dfbd4 in QTWTF::TCMalloc_PageHeap::scavengerThread() () at /lib64/libQt5Script.so.5
#2  0x00007f824d0dfc19 in  () at /lib64/libQt5Script.so.5
#3  0x00007f82592da6ca in start_thread (arg=0x7f8196909700) at pthread_create.c:333
#4  0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 32 (Thread 0x7f8197fff700 (LWP 20007)):
#0  0x00007f8255090540 in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#1  0x00007f825509107b in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f825509126c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f8269957d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f818c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f82699090ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f8197ffec80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#5  0x00007f8269766643 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f826976aa1a in QThreadPrivate::start(void*) (arg=0x557b82528040) at thread/qthread_unix.cpp:344
#7  0x00007f82592da6ca in start_thread (arg=0x7f8197fff700) at pthread_create.c:333
#8  0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 31 (Thread 0x7f81a5798700 (LWP 20004)):
#0  0x00007f8268b4dbdd in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f82550d5450 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007f8255090c60 in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007f82550910f4 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007f825509126c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007f8269957d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f8190000940, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f82699090ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f81a5797c80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#7  0x00007f8269766643 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:507
#8  0x00007f826976aa1a in QThreadPrivate::start(void*) (arg=0x557b8256f850) at thread/qthread_unix.cpp:344
#9  0x00007f82592da6ca in start_thread (arg=0x7f81a5798700) at pthread_create.c:333
#10 0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 30 (Thread 0x7f81a77fd700 (LWP 19725)):
#0  0x00007f8269762dff in QMutex::unlock() (this=this@entry=0x557b81917290) at thread/qmutex.cpp:275
#1  0x00007f8269957c61 in QMutexLocker::unlock() (this=<synthetic pointer>) at ../../src/corelib/thread/qmutex.h:147
#2  0x00007f8269957c61 in QMutexLocker::~QMutexLocker() (this=<synthetic pointer>, __in_chrg=<optimized out>) at ../../src/corelib/thread/qmutex.h:141
#3  0x00007f8269957c61 in QThreadData::canWaitLocked() (this=0x557b81917260) at ../../src/corelib/thread/qthread_p.h:253
#4  0x00007f8269957c61 in postEventSourcePrepare(GSource*, gint*) (s=0x7f819c0012d0, timeout=0x7f81a77fcab4) at kernel/qeventdispatcher_glib.cpp:259
#5  0x00007f8255090699 in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#6  0x00007f825509107b in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#7  0x00007f825509126c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#8  0x00007f8269957d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f819c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#9  0x00007f82699090ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f81a77fcc80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#10 0x00007f8269766643 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:507
#11 0x00007f826976aa1a in QThreadPrivate::start(void*) (arg=0x557b818b7160) at thread/qthread_unix.cpp:344
#12 0x00007f82592da6ca in start_thread (arg=0x7f81a77fd700) at pthread_create.c:333
#13 0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 29 (Thread 0x7f81a7ffe700 (LWP 19716)):
#0  0x00007f8268b5200d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f8255091156 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f825509126c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f8269957d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f81980008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f82699090ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f81a7ffdc80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#5  0x00007f8269766643 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f826976aa1a in QThreadPrivate::start(void*) (arg=0x557b81664c90) at thread/qthread_unix.cpp:344
#7  0x00007f82592da6ca in start_thread (arg=0x7f81a7ffe700) at pthread_create.c:333
#8  0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 28 (Thread 0x7f81b3fff700 (LWP 19709)):
#0  0x00007f82592e0460 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f826055fb09 in base::SequencedWorkerPool::Inner::ThreadLoop(base::SequencedWorkerPool::Worker*) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f8260560109 in base::SequencedWorkerPool::Worker::Run() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f82605602c0 in base::SimpleThread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f826055cc5c in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f82592da6ca in start_thread (arg=0x7f81b3fff700) at pthread_create.c:333
#6  0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 27 (Thread 0x7f81d4ff9700 (LWP 19708)):
#0  0x00007f8268b5200d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f8247ce2f51 in poll_func () at /lib64/libpulse.so.0
#2  0x00007f8247cd4721 in pa_mainloop_poll () at /lib64/libpulse.so.0
#3  0x00007f8247cd4dbe in pa_mainloop_iterate () at /lib64/libpulse.so.0
#4  0x00007f8247cd4e70 in pa_mainloop_run () at /lib64/libpulse.so.0
#5  0x00007f8247ce2e99 in thread () at /lib64/libpulse.so.0
#6  0x00007f8245853178 in internal_thread_func () at /usr/lib64/pulseaudio/libpulsecommon-9.0.so
#7  0x00007f82592da6ca in start_thread (arg=0x7f81d4ff9700) at pthread_create.c:333
#8  0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 26 (Thread 0x7f81d57fa700 (LWP 19707)):
#0  0x00007f82592e0809 in pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007f8260554222 in base::ConditionVariable::TimedWait(base::TimeDelta const&) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f8260554ad5 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f82605356c1 in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f82605478c4 in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f8260531855 in base::MessageLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f82605608ea in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f826055cc5c in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007f82592da6ca in start_thread (arg=0x7f81d57fa700) at pthread_create.c:333
#9  0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 25 (Thread 0x7f81d5ffb700 (LWP 19706)):
#0  0x00007f8268b6bebc in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f8268b6dac4 in ___fprintf_chk (fp=0x7f8268e18730 <_IO_stdfile_2_lock>, flag=1, format=0x7f8250e0dc74 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f8250df586e in _warn_helper () at /lib64/libevent-2.0.so.5
#3  0x00007f8250df5a64 in event_warn () at /lib64/libevent-2.0.so.5
#4  0x00007f8250dfa1e8 in epoll_dispatch () at /lib64/libevent-2.0.so.5
#5  0x00007f8250de418a in event_base_loop () at /lib64/libevent-2.0.so.5
#6  0x00007f826050b14a in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f82605478c4 in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007f8260531855 in base::MessageLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#9  0x00007f82605608ea in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#10 0x00007f826055cc5c in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#11 0x00007f82592da6ca in start_thread (arg=0x7f81d5ffb700) at pthread_create.c:333
#12 0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 24 (Thread 0x7f81d67fc700 (LWP 19705)):
[KCrash Handler]
#6  0x00007f823850a22f in pushbuf_kref () at /lib64/libdrm_nouveau.so.2
#7  0x00007f823850a8b9 in pushbuf_validate () at /lib64/libdrm_nouveau.so.2
#8  0x00007f8238f07876 in nvc0_flush () at /usr/lib64/dri/nouveau_dri.so
#9  0x00007f8238a88e29 in _mesa_FenceSync () at /usr/lib64/dri/nouveau_dri.so
#10 0x00007f82600b2a0d in gfx::GLFenceARB::GLFenceARB() () at /lib64/libQt5WebEngineCore.so.5
#11 0x00007f82600b2576 in gfx::GLFence::Create() () at /lib64/libQt5WebEngineCore.so.5
#12 0x00007f8260b7a910 in gpu::gles2::CommandsCompletedQuery::End(int) () at /lib64/libQt5WebEngineCore.so.5
#13 0x00007f8260b16d61 in gpu::gles2::GLES2DecoderImpl::HandleEndQueryEXT(unsigned int, void const*) () at /lib64/libQt5WebEngineCore.so.5
#14 0x00007f8260b44fb2 in gpu::error::Error gpu::gles2::GLES2DecoderImpl::DoCommandsImpl<false>(unsigned int, void const*, int, int*) () at /lib64/libQt5WebEngineCore.so.5
#15 0x00007f8260b9563a in gpu::CommandParser::ProcessCommands(int) () at /lib64/libQt5WebEngineCore.so.5
#16 0x00007f8260b595fa in gpu::GpuScheduler::PutChanged() () at /lib64/libQt5WebEngineCore.so.5
#17 0x00007f825febcaf1 in content::GpuCommandBufferStub::OnAsyncFlush(int, unsigned int, std::vector<ui::LatencyInfo, std::allocator<ui::LatencyInfo> > const&) () at /lib64/libQt5WebEngineCore.so.5
#18 0x00007f825fec03d1 in content::GpuCommandBufferStub::OnMessageReceived(IPC::Message const&) () at /lib64/libQt5WebEngineCore.so.5
#19 0x00007f825febb74e in content::GpuChannel::HandleMessage() [clone .part.322] () at /lib64/libQt5WebEngineCore.so.5
#20 0x00007f8260589309 in base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask const&) () at /lib64/libQt5WebEngineCore.so.5
#21 0x00007f82605324c8 in base::MessageLoop::RunTask(base::PendingTask const&) () at /lib64/libQt5WebEngineCore.so.5
#22 0x00007f8260533139 in base::MessageLoop::DeferOrRunPendingTask(base::PendingTask const&) () at /lib64/libQt5WebEngineCore.so.5
#23 0x00007f8260533602 in base::MessageLoop::DoWork() () at /lib64/libQt5WebEngineCore.so.5
#24 0x00007f8260535629 in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#25 0x00007f82605478c4 in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#26 0x00007f8260531855 in base::MessageLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#27 0x00007f82605608ea in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#28 0x00007f826055cc5c in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#29 0x00007f82592da6ca in start_thread (arg=0x7f81d67fc700) at pthread_create.c:333
#30 0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 23 (Thread 0x7f81d6ffd700 (LWP 19704)):
#0  0x00007f82592e0460 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f82600e3b50 in mojo::system::Waiter::Wait(unsigned long, unsigned long*) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f82600cbc50 in mojo::system::Core::WaitManyInternal(unsigned int const*, unsigned int const*, unsigned int, unsigned long, unsigned int*, mojo::system::HandleSignalsState*) () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f82600cbfeb in mojo::system::Core::Wait(unsigned int, unsigned int, unsigned long, mojo::system::UserPointer<MojoHandleSignalsState>) () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f82600c787a in MojoWait () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f82612bb40e in mojo::common::MessagePumpMojo::WaitForReadyHandles(mojo::common::MessagePumpMojo::RunState const&) const () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f82612bd8a4 in mojo::common::MessagePumpMojo::DoInternalWork(mojo::common::MessagePumpMojo::RunState const&, bool) () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f82612bd8f5 in mojo::common::MessagePumpMojo::DoRunLoop(mojo::common::MessagePumpMojo::RunState*, base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007f82612bd9d9 in mojo::common::MessagePumpMojo::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#9  0x00007f82605478c4 in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#10 0x00007f8260531855 in base::MessageLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#11 0x00007f82605608ea in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#12 0x00007f826055cc5c in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#13 0x00007f82592da6ca in start_thread (arg=0x7f81d6ffd700) at pthread_create.c:333
#14 0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 22 (Thread 0x7f81d77fe700 (LWP 19703)):
#0  0x00007f82592e0460 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f825fbc420d in cc::SingleThreadTaskGraphRunner::Run() () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f826056019e in base::DelegateSimpleThread::Run() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f82605602c0 in base::SimpleThread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f826055cc5c in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f82592da6ca in start_thread (arg=0x7f81d77fe700) at pthread_create.c:333
#6  0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 21 (Thread 0x7f81d7fff700 (LWP 19702)):
#0  0x00007f82592e0460 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f8260554a45 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f8260554b15 in base::WaitableEvent::Wait() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f8260535673 in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f82605478c4 in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f8260531855 in base::MessageLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f82605608ea in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f826055cc5c in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007f82592da6ca in start_thread (arg=0x7f81d7fff700) at pthread_create.c:333
#9  0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 20 (Thread 0x7f81f8ff9700 (LWP 19701)):
#0  0x00007f8268b6bebc in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f8268b6dac4 in ___fprintf_chk (fp=0x7f8268e18730 <_IO_stdfile_2_lock>, flag=1, format=0x7f8250e0dc74 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f8250df586e in _warn_helper () at /lib64/libevent-2.0.so.5
#3  0x00007f8250df5a64 in event_warn () at /lib64/libevent-2.0.so.5
#4  0x00007f8250dfa1e8 in epoll_dispatch () at /lib64/libevent-2.0.so.5
#5  0x00007f8250de418a in event_base_loop () at /lib64/libevent-2.0.so.5
#6  0x00007f826050b09e in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f82605478c4 in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007f8260531855 in base::MessageLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#9  0x00007f825f7cba28 in content::BrowserThreadImpl::IOThreadRun(base::MessageLoop*) () at /lib64/libQt5WebEngineCore.so.5
#10 0x00007f825f7cbb6b in content::BrowserThreadImpl::Run(base::MessageLoop*) () at /lib64/libQt5WebEngineCore.so.5
#11 0x00007f8260560968 in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#12 0x00007f826055cc5c in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#13 0x00007f82592da6ca in start_thread (arg=0x7f81f8ff9700) at pthread_create.c:333
#14 0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 19 (Thread 0x7f81f97fa700 (LWP 19700)):
#0  0x00007f8268b6bebc in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f8268b6dac4 in ___fprintf_chk (fp=0x7f8268e18730 <_IO_stdfile_2_lock>, flag=1, format=0x7f8250e0dc74 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f8250df586e in _warn_helper () at /lib64/libevent-2.0.so.5
#3  0x00007f8250df5a64 in event_warn () at /lib64/libevent-2.0.so.5
#4  0x00007f8250dfa1e8 in epoll_dispatch () at /lib64/libevent-2.0.so.5
#5  0x00007f8250de418a in event_base_loop () at /lib64/libevent-2.0.so.5
#6  0x00007f826050b09e in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f82605478c4 in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007f8260531855 in base::MessageLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#9  0x00007f825f7cb978 in content::BrowserThreadImpl::CacheThreadRun(base::MessageLoop*) () at /lib64/libQt5WebEngineCore.so.5
#10 0x00007f825f7cbbcb in content::BrowserThreadImpl::Run(base::MessageLoop*) () at /lib64/libQt5WebEngineCore.so.5
#11 0x00007f8260560968 in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#12 0x00007f826055cc5c in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#13 0x00007f82592da6ca in start_thread (arg=0x7f81f97fa700) at pthread_create.c:333
#14 0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 18 (Thread 0x7f81f9ffb700 (LWP 19699)):
#0  0x00007f82592e0460 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f8260554a45 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f8260554b15 in base::WaitableEvent::Wait() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f8260535673 in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f82605478c4 in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f8260531855 in base::MessageLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f825f7cb8c8 in content::BrowserThreadImpl::ProcessLauncherThreadRun(base::MessageLoop*) () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f825f7cbbbb in content::BrowserThreadImpl::Run(base::MessageLoop*) () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007f8260560968 in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#9  0x00007f826055cc5c in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#10 0x00007f82592da6ca in start_thread (arg=0x7f81f9ffb700) at pthread_create.c:333
#11 0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 17 (Thread 0x7f81fa7fc700 (LWP 19698)):
#0  0x00007f82592e0460 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f8260554a45 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f8260554b15 in base::WaitableEvent::Wait() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f8260535673 in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f82605478c4 in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f8260531855 in base::MessageLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f825f7cb818 in content::BrowserThreadImpl::FileUserBlockingThreadRun(base::MessageLoop*) () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f825f7cbbab in content::BrowserThreadImpl::Run(base::MessageLoop*) () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007f8260560968 in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#9  0x00007f826055cc5c in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#10 0x00007f82592da6ca in start_thread (arg=0x7f81fa7fc700) at pthread_create.c:333
#11 0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 16 (Thread 0x7f81faffd700 (LWP 19697)):
#0  0x00007f8268b4dc10 in write () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f8268ad0ab7 in _IO_new_file_write (f=0x7f8268e17500 <_IO_2_1_stderr_>, data=0x7f81faff9b20, n=39) at fileops.c:1271
#2  0x00007f8268ad13c8 in new_do_write (to_do=<optimized out>, data=0x7f81faff9b20 "[warn] epoll_wait: Bad file descriptor\n", fp=0x7f8268e17500 <_IO_2_1_stderr_>) at fileops.c:526
#3  0x00007f8268ad13c8 in _IO_new_file_xsputn (f=0x7f8268e17500 <_IO_2_1_stderr_>, data=<optimized out>, n=39) at fileops.c:1350
#4  0x00007f8268aa6a65 in buffered_vfprintf (s=0x7f8268e17500 <_IO_2_1_stderr_>, format=<optimized out>, args=<optimized out>) at vfprintf.c:2346
#5  0x00007f8268aa3c15 in _IO_vfprintf_internal (s=s@entry=0x7f8268e17500 <_IO_2_1_stderr_>, format=0x7f8250e0dc74 "[%s] %s\n", ap=ap@entry=0x7f81faffc0b8) at vfprintf.c:1293
#6  0x00007f8268b6db19 in ___fprintf_chk (fp=0x7f8268e17500 <_IO_2_1_stderr_>, flag=1, format=<optimized out>) at fprintf_chk.c:35
#7  0x00007f8250df586e in _warn_helper () at /lib64/libevent-2.0.so.5
#8  0x00007f8250df5a64 in event_warn () at /lib64/libevent-2.0.so.5
#9  0x00007f8250dfa1e8 in epoll_dispatch () at /lib64/libevent-2.0.so.5
#10 0x00007f8250de418a in event_base_loop () at /lib64/libevent-2.0.so.5
#11 0x00007f826050b14a in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#12 0x00007f82605478c4 in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#13 0x00007f8260531855 in base::MessageLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#14 0x00007f825f7cb768 in content::BrowserThreadImpl::FileThreadRun(base::MessageLoop*) () at /lib64/libQt5WebEngineCore.so.5
#15 0x00007f825f7cbb9b in content::BrowserThreadImpl::Run(base::MessageLoop*) () at /lib64/libQt5WebEngineCore.so.5
#16 0x00007f8260560968 in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#17 0x00007f826055cc5c in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#18 0x00007f82592da6ca in start_thread (arg=0x7f81faffd700) at pthread_create.c:333
#19 0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 15 (Thread 0x7f81fb7fe700 (LWP 19696)):
#0  0x00007f82592e0460 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f8260554a45 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f8260554b15 in base::WaitableEvent::Wait() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f8260535673 in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f82605478c4 in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f8260531855 in base::MessageLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f825f7cb6b8 in content::BrowserThreadImpl::DBThreadRun(base::MessageLoop*) () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f825f7cbb8b in content::BrowserThreadImpl::Run(base::MessageLoop*) () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007f8260560968 in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#9  0x00007f826055cc5c in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#10 0x00007f82592da6ca in start_thread (arg=0x7f81fb7fe700) at pthread_create.c:333
#11 0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 14 (Thread 0x7f81fbfff700 (LWP 19695)):
#0  0x00007f82592e0809 in pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007f8260554222 in base::ConditionVariable::TimedWait(base::TimeDelta const&) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f8260563558 in base::PosixDynamicThreadPool::WaitForTask() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f8260563a8d in base::(anonymous namespace)::WorkerThread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f826055cc5c in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f82592da6ca in start_thread (arg=0x7f81fbfff700) at pthread_create.c:333
#6  0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 13 (Thread 0x7f821085d700 (LWP 19694)):
#0  0x00007f82592e0809 in pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007f8260554222 in base::ConditionVariable::TimedWait(base::TimeDelta const&) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f8260563558 in base::PosixDynamicThreadPool::WaitForTask() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f8260563a8d in base::(anonymous namespace)::WorkerThread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f826055cc5c in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f82592da6ca in start_thread (arg=0x7f821085d700) at pthread_create.c:333
#6  0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 12 (Thread 0x7f821105e700 (LWP 19693)):
#0  0x00007f82592e0460 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f8260554a45 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f8260554b15 in base::WaitableEvent::Wait() () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f8260535673 in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f82605478c4 in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f8260531855 in base::MessageLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f82605608ea in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f826055cc5c in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007f82592da6ca in start_thread (arg=0x7f821105e700) at pthread_create.c:333
#9  0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 11 (Thread 0x7f821185f700 (LWP 19692)):
#0  0x00007f8268b6bebc in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f8268b6dac4 in ___fprintf_chk (fp=0x7f8268e18730 <_IO_stdfile_2_lock>, flag=1, format=0x7f8250e0dc74 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f8250df586e in _warn_helper () at /lib64/libevent-2.0.so.5
#3  0x00007f8250df5a64 in event_warn () at /lib64/libevent-2.0.so.5
#4  0x00007f8250dfa1e8 in epoll_dispatch () at /lib64/libevent-2.0.so.5
#5  0x00007f8250de418a in event_base_loop () at /lib64/libevent-2.0.so.5
#6  0x00007f826050b09e in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f82605478c4 in base::RunLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007f8260531855 in base::MessageLoop::Run() () at /lib64/libQt5WebEngineCore.so.5
#9  0x00007f82605608ea in base::Thread::ThreadMain() () at /lib64/libQt5WebEngineCore.so.5
#10 0x00007f826055cc5c in base::(anonymous namespace)::ThreadFunc(void*) () at /lib64/libQt5WebEngineCore.so.5
#11 0x00007f82592da6ca in start_thread (arg=0x7f821185f700) at pthread_create.c:333
#12 0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 10 (Thread 0x7f82137fe700 (LWP 19684)):
#0  0x00007f8268b5200d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f8255091156 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f825509126c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f8269957d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f82040008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f82699090ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f82137fdc80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#5  0x00007f8269766643 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f826976aa1a in QThreadPrivate::start(void*) (arg=0x557b81465bb0) at thread/qthread_unix.cpp:344
#7  0x00007f82592da6ca in start_thread (arg=0x7f82137fe700) at pthread_create.c:333
#8  0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 9 (Thread 0x7f8213fff700 (LWP 19682)):
#0  0x00007f8268b4dbdd in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f82550d5450 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007f8255090c60 in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007f82550910f4 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007f825509126c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007f8269957d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f820c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f82699090ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f8213ffec80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#7  0x00007f8269766643 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:507
#8  0x00007f826976aa1a in QThreadPrivate::start(void*) (arg=0x557b8136d060) at thread/qthread_unix.cpp:344
#9  0x00007f82592da6ca in start_thread (arg=0x7f8213fff700) at pthread_create.c:333
#10 0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 8 (Thread 0x7f82295eb700 (LWP 19680)):
#0  0x00007f8268b4dbdd in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f82550d5450 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007f8255090c60 in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007f82550910f4 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007f825509126c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007f8269957d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f82180008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f82699090ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f82295eac80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#7  0x00007f8269766643 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:507
#8  0x00007f826976aa1a in QThreadPrivate::start(void*) (arg=0x557b812580f0) at thread/qthread_unix.cpp:344
#9  0x00007f82592da6ca in start_thread (arg=0x7f82295eb700) at pthread_create.c:333
#10 0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 7 (Thread 0x7f8229dec700 (LWP 19678)):
#0  0x00007f8268b5200d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f8255091156 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f825509126c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f8269957d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f82140008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f82699090ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f8229debc80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#5  0x00007f8269766643 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f826976aa1a in QThreadPrivate::start(void*) (arg=0x557b8120f160) at thread/qthread_unix.cpp:344
#7  0x00007f82592da6ca in start_thread (arg=0x7f8229dec700) at pthread_create.c:333
#8  0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 6 (Thread 0x7f822a5ed700 (LWP 19675)):
#0  0x00007f82550908d0 in g_main_context_query () at /lib64/libglib-2.0.so.0
#1  0x00007f82550910c8 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f825509126c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f8269957d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f82200008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f82699090ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f822a5ecc80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#5  0x00007f8269766643 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f826976aa1a in QThreadPrivate::start(void*) (arg=0x557b81202270) at thread/qthread_unix.cpp:344
#7  0x00007f82592da6ca in start_thread (arg=0x7f822a5ed700) at pthread_create.c:333
#8  0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 5 (Thread 0x7f822adee700 (LWP 19674)):
#0  0x00007ffc0693eac6 in clock_gettime ()
#1  0x00007f8268b6c686 in __GI___clock_gettime (clock_id=clock_id@entry=1, tp=tp@entry=0x7f822aded9d0) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007f82698015e1 in qt_clock_gettime (ts=0x7f822aded9d0, clock=<optimized out>) at tools/qelapsedtimer_unix.cpp:109
#3  0x00007f82698015e1 in do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at tools/qelapsedtimer_unix.cpp:164
#4  0x00007f82698015e1 in qt_gettime() () at tools/qelapsedtimer_unix.cpp:173
#5  0x00007f8269956459 in QTimerInfoList::updateCurrentTime() (this=this@entry=0x7f821c002ed0) at kernel/qtimerinfo_unix.cpp:91
#6  0x00007f8269956855 in QTimerInfoList::timerWait(timespec&) (this=0x7f821c002ed0, tm=...) at kernel/qtimerinfo_unix.cpp:388
#7  0x00007f8269957a2c in timerSourcePrepareHelper(GTimerSource*, gint*) (src=<optimized out>, timeout=0x7f822adedab4) at kernel/qeventdispatcher_glib.cpp:132
#8  0x00007f8269957af5 in timerSourcePrepare(GSource*, gint*) (source=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:165
#9  0x00007f8255090699 in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#10 0x00007f825509107b in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#11 0x00007f825509126c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#12 0x00007f8269957d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f821c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#13 0x00007f82699090ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f822adedc80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#14 0x00007f8269766643 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:507
#15 0x00007f826976aa1a in QThreadPrivate::start(void*) (arg=0x557b812671e0) at thread/qthread_unix.cpp:344
#16 0x00007f82592da6ca in start_thread (arg=0x7f822adee700) at pthread_create.c:333
#17 0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 4 (Thread 0x7f822b5ef700 (LWP 19673)):
#0  0x00007f82550d67f9 in g_mutex_lock () at /lib64/libglib-2.0.so.0
#1  0x00007f8255091050 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f825509126c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f8269957d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f82240008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f82699090ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f822b5eec80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#5  0x00007f8269766643 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f826976aa1a in QThreadPrivate::start(void*) (arg=0x557b8121e2d0) at thread/qthread_unix.cpp:344
#7  0x00007f82592da6ca in start_thread (arg=0x7f822b5ef700) at pthread_create.c:333
#8  0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 3 (Thread 0x7f8230ed0700 (LWP 19672)):
#0  0x00007f8268b5200d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f8255091156 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f825509126c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f8269957d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f822c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f82699090ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f8230ecfc40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#5  0x00007f8269766643 in QThread::exec() (this=this@entry=0x7f826a97a060 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:507
#6  0x00007f826a9047a9 in QDBusConnectionManager::run() (this=0x7f826a97a060 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:196
#7  0x00007f826976aa1a in QThreadPrivate::start(void*) (arg=0x7f826a97a060 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:344
#8  0x00007f82592da6ca in start_thread (arg=0x7f8230ed0700) at pthread_create.c:333
#9  0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 2 (Thread 0x7f823a444700 (LWP 19671)):
#0  0x00007f8268b5200d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f8254785d10 in _xcb_conn_wait () at /lib64/libxcb.so.1
#2  0x00007f8254787aa9 in xcb_wait_for_event () at /lib64/libxcb.so.1
#3  0x00007f823d1efa19 in QXcbEventReader::run() (this=0x557b81022330) at qxcbconnection.cpp:1337
#4  0x00007f826976aa1a in QThreadPrivate::start(void*) (arg=0x557b81022330) at thread/qthread_unix.cpp:344
#5  0x00007f82592da6ca in start_thread (arg=0x7f823a444700) at pthread_create.c:333
#6  0x00007f8268b5df6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 1 (Thread 0x7f8243db7940 (LWP 19670)):
#0  0x00007f82592e0460 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f826976b09a in QWaitConditionPrivate::wait(unsigned long) (time=18446744073709551615, this=0x557b818f5e60) at thread/qwaitcondition_unix.cpp:143
#2  0x00007f826976b09a in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x557b818b1e18, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f825ec585f6 in QtWebEngineCore::DelegatedFrameNode::fetchAndSyncMailboxes(QList<QtWebEngineCore::MailboxTexture*>&) () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f825ec58fce in QtWebEngineCore::DelegatedFrameNode::preprocess() () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f825e33aba7 in QSGRenderer::preprocess() () at /lib64/libQt5Quick.so.5
#6  0x00007f825e33a2ff in QSGRenderer::renderScene(QSGBindable const&) () at /lib64/libQt5Quick.so.5
#7  0x00007f825e33aa27 in QSGRenderer::renderScene(unsigned int) () at /lib64/libQt5Quick.so.5
#8  0x00007f826349419d in QtWebEngineCore::RenderWidgetHostViewQtDelegateWidget::paintGL() () at /lib64/libQt5WebEngineWidgets.so.5
#9  0x00007f826a1b8d5d in QOpenGLWidgetPrivate::invokeUserPaint() (this=0x557b814d9d10) at kernel/qopenglwidget.cpp:829
#10 0x00007f826a199c30 in QWidget::event(QEvent*) (this=0x557b814d9c90, event=0x7ffc06839390) at kernel/qwidget.cpp:9144
#11 0x00007f826349443e in QtWebEngineCore::RenderWidgetHostViewQtDelegateWidget::event(QEvent*) () at /lib64/libQt5WebEngineWidgets.so.5
#12 0x00007f826a15296c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=<optimized out>, receiver=0x557b814d9c90, e=0x7ffc06839390) at kernel/qapplication.cpp:3799
#13 0x00007f826a15a111 in QApplication::notify(QObject*, QEvent*) (this=0x7ffc0683a410, receiver=0x557b814d9c90, e=0x7ffc06839390) at kernel/qapplication.cpp:3556
#14 0x00007f826990a12a in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=receiver@entry=0x557b814d9c90, event=event@entry=0x7ffc06839390) at kernel/qcoreapplication.cpp:988
#15 0x00007f826a19297a in QCoreApplication::sendSpontaneousEvent(QObject*, QEvent*) (event=0x7ffc06839390, receiver=<optimized out>) at ../../src/corelib/kernel/qcoreapplication.h:234
#16 0x00007f826a19297a in QWidgetPrivate::sendPaintEvent(QRegion const&) (this=0x557b814d9d10, toBePainted=...) at kernel/qwidget.cpp:5696
#17 0x00007f826a162336 in QWidgetBackingStore::doSync() (this=this@entry=0x557b8176dd30) at kernel/qwidgetbackingstore.cpp:1268
#18 0x00007f826a162dcf in QWidgetBackingStore::sync() (this=0x557b8176dd30) at kernel/qwidgetbackingstore.cpp:1151
#19 0x00007f826a181d1f in QWidgetPrivate::syncBackingStore() (this=0x557b812b2b10) at kernel/qwidget.cpp:1955
#20 0x00007f826a199d08 in QWidget::event(QEvent*) (this=this@entry=0x557b812b2490, event=event@entry=0x557b82390450) at kernel/qwidget.cpp:9083
#21 0x00007f826a2987cb in QMainWindow::event(QEvent*) (this=this@entry=0x557b812b2490, event=event@entry=0x557b82390450) at widgets/qmainwindow.cpp:1543
#22 0x00007f826ccee7b7 in KMainWindow::event(QEvent*) (this=this@entry=0x557b812b2490, ev=ev@entry=0x557b82390450) at /usr/src/debug/kxmlgui-5.27.0/src/kmainwindow.cpp:867
#23 0x00007f826cd33365 in KXmlGuiWindow::event(QEvent*) (this=0x557b812b2490, ev=0x557b82390450) at /usr/src/debug/kxmlgui-5.27.0/src/kxmlguiwindow.cpp:118
#24 0x00007f826a15296c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=<optimized out>, receiver=0x557b812b2490, e=0x557b82390450) at kernel/qapplication.cpp:3799
#25 0x00007f826a15a111 in QApplication::notify(QObject*, QEvent*) (this=0x7ffc0683a410, receiver=0x557b812b2490, e=0x557b82390450) at kernel/qapplication.cpp:3556
#26 0x00007f826990a12a in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x557b812b2490, event=event@entry=0x557b82390450) at kernel/qcoreapplication.cpp:988
#27 0x00007f826990c800 in QCoreApplication::sendEvent(QObject*, QEvent*) (event=0x557b82390450, receiver=<optimized out>) at kernel/qcoreapplication.h:231
#28 0x00007f826990c800 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x557b80ff0780) at kernel/qcoreapplication.cpp:1649
#29 0x00007f826990ccd8 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1503
#30 0x00007f8269957cf3 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x557b8105e730) at kernel/qeventdispatcher_glib.cpp:276
#31 0x00007f8255090e42 in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#32 0x00007f82550911c0 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#33 0x00007f825509126c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#34 0x00007f8269957d6f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x557b8106acc0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#35 0x00007f82699090ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffc06839da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#36 0x00007f8269910bac in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1261
#37 0x0000557b809adb34 in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/kdepim-16.08.2/kmail/src/main.cpp:161

Reported using DrKonqi
Comment 1 Christoph Feck 2016-11-29 23:17:25 UTC 

*** This bug has been marked as a duplicate of bug 368983 ***