Bug 384565

Application: kmail (5.4.3)

Qt Version: 5.6.2
Frameworks Version: 5.32.0
Operating System: Linux 4.9.43-desktop-1.mga6 x86_64
Distribution: "Mageia 6"

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

Created new email filter for from: field, clicked on email in inbox,  and applied the filter to an email with keyboard shortcut Ctrl-J

-- Backtrace:
Application: KMail (kmail), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f2415386840 (LWP 6588))]

Thread 29 (Thread 0x7f229e5ec700 (LWP 8762)):
#0  0x00007f240bdb4c4f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f24027506ef in base::SequencedWorkerPool::Inner::ThreadLoop(base::SequencedWorkerPool::Worker*) (this=0x1ea17e0, this_worker=this_worker@entry=0x7f2394093000) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/sequenced_worker_pool.cc:845
#2  0x00007f2402750e10 in base::SequencedWorkerPool::Worker::Run() (this=0x7f2394093000) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/sequenced_worker_pool.cc:520
#3  0x00007f2402750fe0 in base::SimpleThread::ThreadMain() (this=0x7f2394093000) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/simple_thread.cc:66
#4  0x00007f240274db6d in base::(anonymous namespace)::ThreadFunc(void*) (params=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#5  0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#6  0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 28 (Thread 0x7f22d596d700 (LWP 7133)):
#0  0x00007f240bdb4c4f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f24027506ef in base::SequencedWorkerPool::Inner::ThreadLoop(base::SequencedWorkerPool::Worker*) (this=0x1ea17e0, this_worker=this_worker@entry=0x7f23940924b0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/sequenced_worker_pool.cc:845
#2  0x00007f2402750e10 in base::SequencedWorkerPool::Worker::Run() (this=0x7f23940924b0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/sequenced_worker_pool.cc:520
#3  0x00007f2402750fe0 in base::SimpleThread::ThreadMain() (this=0x7f23940924b0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/simple_thread.cc:66
#4  0x00007f240274db6d in base::(anonymous namespace)::ThreadFunc(void*) (params=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#5  0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#6  0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 27 (Thread 0x7f2356eb7700 (LWP 7063)):
#0  0x00007f240bdb4c4f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f23fdb4e234 in QTWTF::TCMalloc_PageHeap::scavengerThread() () at /lib64/libQt5Script.so.5
#2  0x00007f23fdb4e279 in  () at /lib64/libQt5Script.so.5
#3  0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#4  0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 26 (Thread 0x7f235ccb4700 (LWP 7050)):
#0  0x00007f24156da00d in poll () at /lib64/libc.so.6
#1  0x00007f240b581c94 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f240b581d9c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f2416201e2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f2358000940, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#4  0x00007f24161ad49a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f235ccb3da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:206
#5  0x00007f2415fe73bc in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:500
#6  0x00007f2415febff9 in QThreadPrivate::start(void*) (arg=0x23d6100) at thread/qthread_unix.cpp:365
#7  0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#8  0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 25 (Thread 0x7f239dffb700 (LWP 6622)):
#0  0x00007f240bdb4c4f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f2402666830 in mojo::system::Waiter::Wait(unsigned long, unsigned int*) (this=this@entry=0x7f239dffa6f0, deadline=deadline@entry=18446744073709551615, context=context@entry=0x7f239dffa7ec) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/third_party/mojo/src/mojo/edk/system/waiter.cc:62
#2  0x00007f240265330c in mojo::system::Core::WaitManyInternal(unsigned int const*, unsigned int const*, unsigned int, unsigned long, unsigned int*, mojo::system::HandleSignalsState*) (this=this@entry=0x1e767c0, handles=handles@entry=0x7f2364002180, signals=signals@entry=0x7f2364002b10, num_handles=num_handles@entry=4, deadline=deadline@entry=18446744073709551615, result_index=result_index@entry=0x7f239dffa7ec, signals_states=0x0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/third_party/mojo/src/mojo/edk/system/core.cc:600
#3  0x00007f240265349a 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>) (this=0x1e767c0, handles=..., signals=..., num_handles=4, deadline=deadline@entry=18446744073709551615, result_index=..., signals_states=...) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/third_party/mojo/src/mojo/edk/system/core.cc:179
#4  0x00007f240264fcb5 in MojoWaitMany(MojoHandle const*, MojoHandleSignals const*, uint32_t, MojoDeadline, uint32_t*, MojoHandleSignalsState*) (handles=<optimized out>, signals=<optimized out>, num_handles=<optimized out>, deadline=deadline@entry=18446744073709551615, result_index=result_index@entry=0x7f239dffa8e0, signals_states=signals_states@entry=0x0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/third_party/mojo/src/mojo/edk/embedder/entrypoints.cc:41
#5  0x00007f2403bb51c7 in mojo::WaitMany<std::vector<mojo::Handle, std::allocator<mojo::Handle> >, std::vector<unsigned int, std::allocator<unsigned int> > >(std::vector<mojo::Handle, std::allocator<mojo::Handle> > const&, std::vector<unsigned int, std::allocator<unsigned int> > const&, unsigned long, decltype(nullptr)) (signals_states=void, deadline=18446744073709551615, signals=std::vector of length 4, capacity 4 = {...}, handles=std::vector of length 4, capacity 4 = {...}) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/third_party/mojo/src/mojo/public/cpp/system/handle.h:267
#6  0x00007f2403bb51c7 in mojo::common::MessagePumpMojo::DoInternalWork(mojo::common::MessagePumpMojo::RunState const&, bool) (this=this@entry=0x7f2364001940, run_state=..., block=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/mojo/common/message_pump_mojo.cc:178
#7  0x00007f2403bb540e in mojo::common::MessagePumpMojo::DoRunLoop(mojo::common::MessagePumpMojo::RunState*, base::MessagePump::Delegate*) (this=this@entry=0x7f2364001940, run_state=run_state@entry=0x7f239dffab30, delegate=delegate@entry=0x1ea79d0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/mojo/common/message_pump_mojo.cc:150
#8  0x00007f2403bb554d in mojo::common::MessagePumpMojo::Run(base::MessagePump::Delegate*) (this=0x7f2364001940, delegate=0x1ea79d0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/mojo/common/message_pump_mojo.cc:119
#9  0x00007f2402739998 in base::RunLoop::Run() (this=this@entry=0x7f239dffad60) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/run_loop.cc:55
#10 0x00007f2402725295 in base::MessageLoop::Run() (this=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_loop.cc:287
#11 0x00007f2402751496 in base::Thread::Run(base::MessageLoop*) (message_loop=<optimized out>, this=0x1ed9870) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:198
#12 0x00007f2402751496 in base::Thread::ThreadMain() (this=0x1ed9870) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:248
#13 0x00007f240274db6d in base::(anonymous namespace)::ThreadFunc(void*) (params=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#14 0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#15 0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 24 (Thread 0x7f239e7fc700 (LWP 6621)):
#0  0x00007f240bdb4c4f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f24027506ef in base::SequencedWorkerPool::Inner::ThreadLoop(base::SequencedWorkerPool::Worker*) (this=0x1ea17e0, this_worker=this_worker@entry=0x7f23940090e0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/sequenced_worker_pool.cc:845
#2  0x00007f2402750e10 in base::SequencedWorkerPool::Worker::Run() (this=0x7f23940090e0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/sequenced_worker_pool.cc:520
#3  0x00007f2402750fe0 in base::SimpleThread::ThreadMain() (this=0x7f23940090e0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/simple_thread.cc:66
#4  0x00007f240274db6d in base::(anonymous namespace)::ThreadFunc(void*) (params=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#5  0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#6  0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 23 (Thread 0x7f239effd700 (LWP 6620)):
#0  0x00007f24156da00d in poll () at /lib64/libc.so.6
#1  0x00007f23fa3f2fb1 in poll (__timeout=-1, __nfds=3, __fds=0x7f237c006c50) at /usr/include/bits/poll2.h:46
#2  0x00007f23fa3f2fb1 in poll_func (ufds=0x7f237c006c50, nfds=3, timeout=-1, userdata=0x1eef940) at pulse/thread-mainloop.c:69
#3  0x00007f23fa3e4c31 in pa_mainloop_poll (m=m@entry=0x1eee790) at pulse/mainloop.c:844
#4  0x00007f23fa3e526e in pa_mainloop_iterate (m=0x1eee790, block=<optimized out>, retval=0x0) at pulse/mainloop.c:926
#5  0x00007f23fa3e5320 in pa_mainloop_run (m=0x1eee790, retval=retval@entry=0x0) at pulse/mainloop.c:944
#6  0x00007f23fa3f2f16 in thread (userdata=0x1eefbe0) at pulse/thread-mainloop.c:100
#7  0x00007f23f151e9c8 in internal_thread_func (userdata=0x1eef630) at pulsecore/thread-posix.c:81
#8  0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#9  0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 22 (Thread 0x7f239f7fe700 (LWP 6619)):
#0  0x00007f24156e6463 in epoll_wait () at /lib64/libc.so.6
#1  0x00007f23f73b4a95 in epoll_dispatch () at /lib64/libevent.so.6
#2  0x00007f23f73aaee6 in event_base_loop () at /lib64/libevent.so.6
#3  0x00007f24027035fe in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) (this=0x7f2378001940, delegate=0x7f2384001ba0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_pump_libevent.cc:237
#4  0x00007f2402739998 in base::RunLoop::Run() (this=this@entry=0x7f239f7fdd60) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/run_loop.cc:55
#5  0x00007f2402725295 in base::MessageLoop::Run() (this=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_loop.cc:287
#6  0x00007f2402751496 in base::Thread::Run(base::MessageLoop*) (message_loop=<optimized out>, this=0x7f2384001a18) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:198
#7  0x00007f2402751496 in base::Thread::ThreadMain() (this=0x7f2384001a18) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:248
#8  0x00007f240274db6d in base::(anonymous namespace)::ThreadFunc(void*) (params=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#9  0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#10 0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 21 (Thread 0x7f23a4ff9700 (LWP 6618)):
[KCrash Handler]
#6  0x00007f2415623818 in raise () at /lib64/libc.so.6
#7  0x00007f2415624f2a in abort () at /lib64/libc.so.6
#8  0x00007f241561be97 in __assert_fail_base () at /lib64/libc.so.6
#9  0x00007f241561bf42 in  () at /lib64/libc.so.6
#10 0x00007f23e4873d24 in  () at /lib64/libdrm_nouveau.so.2
#11 0x00007f23e4873c6b in nouveau_pushbuf_data () at /lib64/libdrm_nouveau.so.2
#12 0x00007f23e4873da1 in pushbuf_submit.isra () at /lib64/libdrm_nouveau.so.2
#13 0x00007f23e487401f in pushbuf_flush () at /lib64/libdrm_nouveau.so.2
#14 0x00007f23e4874ba0 in nouveau_pushbuf_kick () at /lib64/libdrm_nouveau.so.2
#15 0x00007f23e5067ef6 in nvc0_flush () at /usr/lib64/dri/nouveau_dri.so
#16 0x00007f23e4c40bc9 in _mesa_FenceSync () at /usr/lib64/dri/nouveau_dri.so
#17 0x00007f240263c66d in gfx::GLFenceARB::GLFenceARB() (this=0x7f23840c5740) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/ui/gl/gl_fence_arb.cc:27
#18 0x00007f240263c1eb in gfx::GLFence::Create() () at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/ui/gl/gl_fence.cc:47
#19 0x00007f240245d6a7 in content::GpuCommandBufferStub::OnRetireSyncPoint(unsigned int) (this=this@entry=0x7f2384128630, sync_point=234709848) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/content/common/gpu/gpu_command_buffer_stub.cc:899
#20 0x00007f240245f952 in base::DispatchToMethodImpl<content::GpuCommandBufferStub, void (content::GpuCommandBufferStub::*)(unsigned int), unsigned int, 0ul>(content::GpuCommandBufferStub*, void (content::GpuCommandBufferStub::*)(unsigned int), base::Tuple<unsigned int> const&, base::IndexSequence<0ul>) (arg=..., method=<optimized out>, obj=0x7f2384128630) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/tuple.h:254
#21 0x00007f240245f952 in base::DispatchToMethod<content::GpuCommandBufferStub, void (content::GpuCommandBufferStub::*)(unsigned int), unsigned int>(content::GpuCommandBufferStub*, void (content::GpuCommandBufferStub::*)(unsigned int), base::Tuple<unsigned int> const&) (arg=..., method=(void (content::GpuCommandBufferStub::*)(content::GpuCommandBufferStub * const, unsigned int)) 0x7f240245d640 <content::GpuCommandBufferStub::OnRetireSyncPoint(unsigned int)>, obj=0x7f2384128630) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/tuple.h:261
#22 0x00007f240245f952 in GpuCommandBufferMsg_RetireSyncPoint::Dispatch<content::GpuCommandBufferStub, content::GpuCommandBufferStub, void, void (content::GpuCommandBufferStub::*)(unsigned int)>(IPC::Message const*, content::GpuCommandBufferStub*, content::GpuCommandBufferStub*, void*, void (content::GpuCommandBufferStub::*)(unsigned int)) (sender=0x7f2384128630, parameter=0x0, func=<optimized out>, obj=0x7f2384128630, msg=0x7f238401f7a0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/content/common/gpu/gpu_messages.h:615
#23 0x00007f240245f952 in content::GpuCommandBufferStub::OnMessageReceived(IPC::Message const&) (this=0x7f2384128630, message=...) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/content/common/gpu/gpu_command_buffer_stub.cc:294
#24 0x00007f240243ee2f in content::MessageRouter::RouteMessage(IPC::Message const&) (this=this@entry=0x7f2384111e50, msg=...) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/content/common/message_router.cc:54
#25 0x00007f24024593c3 in content::GpuChannel::HandleMessage() (this=0x7f2384111d90) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/content/common/gpu/gpu_channel.cc:716
#26 0x00007f2402776080 in base::Callback<void ()>::Run() const (this=0x7f23a4ff8ba8) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/callback.h:396
#27 0x00007f2402776080 in base::debug::TaskAnnotator::RunTask(char const*, char const*, base::PendingTask const&) (this=this@entry=0x7f2394005708, queue_function=queue_function@entry=0x7f2403f48d05 "MessageLoop::PostTask", run_function=run_function@entry=0x7f2403f48cf0 "MessageLoop::RunTask", pending_task=...) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/debug/task_annotator.cc:62
#28 0x00007f2402725dd4 in base::MessageLoop::RunTask(base::PendingTask const&) (this=this@entry=0x7f2394005590, pending_task=...) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_loop.cc:473
#29 0x00007f24027265f9 in base::MessageLoop::DeferOrRunPendingTask(base::PendingTask const&) (this=this@entry=0x7f2394005590, pending_task=...) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_loop.cc:482
#30 0x00007f2402726abd in base::MessageLoop::DoWork() (this=0x7f2394005590) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_loop.cc:594
#31 0x00007f2402728d99 in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) (this=0x7f2384001940, delegate=0x7f2394005590) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_pump_default.cc:32
#32 0x00007f2402739998 in base::RunLoop::Run() (this=this@entry=0x7f23a4ff8d60) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/run_loop.cc:55
#33 0x00007f2402725295 in base::MessageLoop::Run() (this=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_loop.cc:287
#34 0x00007f2402751496 in base::Thread::Run(base::MessageLoop*) (message_loop=<optimized out>, this=0x7f2394005440) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:198
#35 0x00007f2402751496 in base::Thread::ThreadMain() (this=0x7f2394005440) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:248
#36 0x00007f240274db6d in base::(anonymous namespace)::ThreadFunc(void*) (params=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#37 0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#38 0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 20 (Thread 0x7f23a57fa700 (LWP 6617)):
#0  0x00007f240bdb4c4f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f240274672f in base::WaitableEvent::TimedWait(base::TimeDelta const&) (this=this@entry=0x7f23800018c0, max_time=...) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:214
#2  0x00007f2402746807 in base::WaitableEvent::Wait() (this=this@entry=0x7f23800018c0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:154
#3  0x00007f2402728ddb in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) (this=0x7f23800018b0, delegate=0x1ed0130) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_pump_default.cc:52
#4  0x00007f2402739998 in base::RunLoop::Run() (this=this@entry=0x7f23a57f9d60) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/run_loop.cc:55
#5  0x00007f2402725295 in base::MessageLoop::Run() (this=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_loop.cc:287
#6  0x00007f2402751496 in base::Thread::Run(base::MessageLoop*) (message_loop=<optimized out>, this=0x1ef43e0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:198
#7  0x00007f2402751496 in base::Thread::ThreadMain() (this=0x1ef43e0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:248
#8  0x00007f240274db6d in base::(anonymous namespace)::ThreadFunc(void*) (params=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#9  0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#10 0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 19 (Thread 0x7f23a5ffb700 (LWP 6616)):
#0  0x00007f240bdb4c4f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f240203b449 in cc::TaskGraphRunner::Run() (this=0x1ef1e60) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/cc/raster/task_graph_runner.cc:362
#2  0x00007f2402750fe0 in base::SimpleThread::ThreadMain() (this=0x1ecf3a0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/simple_thread.cc:66
#3  0x00007f240274db6d in base::(anonymous namespace)::ThreadFunc(void*) (params=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#4  0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#5  0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 18 (Thread 0x7f23a67fc700 (LWP 6615)):
#0  0x00007f240bdb4c4f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f240274672f in base::WaitableEvent::TimedWait(base::TimeDelta const&) (this=this@entry=0x7f23880018c0, max_time=...) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:214
#2  0x00007f2402746807 in base::WaitableEvent::Wait() (this=this@entry=0x7f23880018c0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:154
#3  0x00007f2402728ddb in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) (this=0x7f23880018b0, delegate=0x1ef41f0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_pump_default.cc:52
#4  0x00007f2402739998 in base::RunLoop::Run() (this=this@entry=0x7f23a67fbd60) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/run_loop.cc:55
#5  0x00007f2402725295 in base::MessageLoop::Run() (this=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_loop.cc:287
#6  0x00007f2402751496 in base::Thread::Run(base::MessageLoop*) (message_loop=<optimized out>, this=0x1ef1950) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:198
#7  0x00007f2402751496 in base::Thread::ThreadMain() (this=0x1ef1950) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:248
#8  0x00007f240274db6d in base::(anonymous namespace)::ThreadFunc(void*) (params=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#9  0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#10 0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 17 (Thread 0x7f23a6ffd700 (LWP 6614)):
#0  0x00007f24156e6463 in epoll_wait () at /lib64/libc.so.6
#1  0x00007f23f73b4a95 in epoll_dispatch () at /lib64/libevent.so.6
#2  0x00007f23f73aaee6 in event_base_loop () at /lib64/libevent.so.6
#3  0x00007f24027035fe in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) (this=0x7f23940018b0, delegate=0x1ef1cb0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_pump_libevent.cc:237
#4  0x00007f2402739998 in base::RunLoop::Run() (this=this@entry=0x7f23a6ffc9d0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/run_loop.cc:55
#5  0x00007f2402725295 in base::MessageLoop::Run() (this=this@entry=0x1ef1cb0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_loop.cc:287
#6  0x00007f24027512c8 in base::Thread::Run(base::MessageLoop*) (this=this@entry=0x1ef1890, message_loop=message_loop@entry=0x1ef1cb0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:198
#7  0x00007f2401cb8f18 in content::BrowserThreadImpl::IOThreadRun(base::MessageLoop*) (this=this@entry=0x1ef1890, message_loop=message_loop@entry=0x1ef1cb0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/content/browser/browser_thread_impl.cc:211
#8  0x00007f2401cb907b in content::BrowserThreadImpl::Run(base::MessageLoop*) (this=0x1ef1890, message_loop=0x1ef1cb0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/content/browser/browser_thread_impl.cc:246
#9  0x00007f2402751518 in base::Thread::ThreadMain() (this=0x1ef1890) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:248
#10 0x00007f240274db6d in base::(anonymous namespace)::ThreadFunc(void*) (params=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#11 0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#12 0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 16 (Thread 0x7f23a77fe700 (LWP 6613)):
#0  0x00007f24156f3359 in __lll_unlock_wake_private () at /lib64/libc.so.6
#1  0x00007f24156f4fb8 in __fprintf_chk () at /lib64/libc.so.6
#2  0x00007f23f73b31ca in event_logv_ () at /lib64/libevent.so.6
#3  0x00007f23f73b3387 in event_warn () at /lib64/libevent.so.6
#4  0x00007f23f73b4c00 in epoll_dispatch () at /lib64/libevent.so.6
#5  0x00007f23f73aaee6 in event_base_loop () at /lib64/libevent.so.6
#6  0x00007f24027035fe in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) (this=0x7f2390001940, delegate=0x1eee890) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_pump_libevent.cc:237
#7  0x00007f2402739998 in base::RunLoop::Run() (this=this@entry=0x7f23a77fd9d0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/run_loop.cc:55
#8  0x00007f2402725295 in base::MessageLoop::Run() (this=this@entry=0x1eee890) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_loop.cc:287
#9  0x00007f24027512c8 in base::Thread::Run(base::MessageLoop*) (this=this@entry=0x1eee580, message_loop=message_loop@entry=0x1eee890) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:198
#10 0x00007f2401cb8e68 in content::BrowserThreadImpl::CacheThreadRun(base::MessageLoop*) (this=this@entry=0x1eee580, message_loop=message_loop@entry=0x1eee890) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/content/browser/browser_thread_impl.cc:205
#11 0x00007f2401cb90db in content::BrowserThreadImpl::Run(base::MessageLoop*) (this=0x1eee580, message_loop=0x1eee890) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/content/browser/browser_thread_impl.cc:244
#12 0x00007f2402751518 in base::Thread::ThreadMain() (this=0x1eee580) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:248
#13 0x00007f240274db6d in base::(anonymous namespace)::ThreadFunc(void*) (params=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#14 0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#15 0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 15 (Thread 0x7f239ffff700 (LWP 6612)):
#0  0x00007f240bdb4c4f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f240274672f in base::WaitableEvent::TimedWait(base::TimeDelta const&) (this=this@entry=0x7f2398000950, max_time=...) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:214
#2  0x00007f2402746807 in base::WaitableEvent::Wait() (this=this@entry=0x7f2398000950) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:154
#3  0x00007f2402728ddb in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) (this=0x7f2398000940, delegate=0x1eec390) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_pump_default.cc:52
#4  0x00007f2402739998 in base::RunLoop::Run() (this=this@entry=0x7f239fffe9d0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/run_loop.cc:55
#5  0x00007f2402725295 in base::MessageLoop::Run() (this=this@entry=0x1eec390) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_loop.cc:287
#6  0x00007f24027512c8 in base::Thread::Run(base::MessageLoop*) (this=this@entry=0x1eead20, message_loop=message_loop@entry=0x1eec390) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:198
#7  0x00007f2401cb8db8 in content::BrowserThreadImpl::ProcessLauncherThreadRun(base::MessageLoop*) (this=this@entry=0x1eead20, message_loop=message_loop@entry=0x1eec390) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/content/browser/browser_thread_impl.cc:198
#8  0x00007f2401cb90cb in content::BrowserThreadImpl::Run(base::MessageLoop*) (this=0x1eead20, message_loop=0x1eec390) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/content/browser/browser_thread_impl.cc:242
#9  0x00007f2402751518 in base::Thread::ThreadMain() (this=0x1eead20) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:248
#10 0x00007f240274db6d in base::(anonymous namespace)::ThreadFunc(void*) (params=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#11 0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#12 0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 14 (Thread 0x7f23a7fff700 (LWP 6611)):
#0  0x00007f240bdb4c4f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f240274672f in base::WaitableEvent::TimedWait(base::TimeDelta const&) (this=this@entry=0x7f23a0000950, max_time=...) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:214
#2  0x00007f2402746807 in base::WaitableEvent::Wait() (this=this@entry=0x7f23a0000950) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:154
#3  0x00007f2402728ddb in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) (this=0x7f23a0000940, delegate=0x1ee9990) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_pump_default.cc:52
#4  0x00007f2402739998 in base::RunLoop::Run() (this=this@entry=0x7f23a7ffe9d0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/run_loop.cc:55
#5  0x00007f2402725295 in base::MessageLoop::Run() (this=this@entry=0x1ee9990) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_loop.cc:287
#6  0x00007f24027512c8 in base::Thread::Run(base::MessageLoop*) (this=this@entry=0x1ee7da0, message_loop=message_loop@entry=0x1ee9990) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:198
#7  0x00007f2401cb8d08 in content::BrowserThreadImpl::FileUserBlockingThreadRun(base::MessageLoop*) (this=this@entry=0x1ee7da0, message_loop=message_loop@entry=0x1ee9990) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/content/browser/browser_thread_impl.cc:191
#8  0x00007f2401cb90bb in content::BrowserThreadImpl::Run(base::MessageLoop*) (this=0x1ee7da0, message_loop=0x1ee9990) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/content/browser/browser_thread_impl.cc:240
#9  0x00007f2402751518 in base::Thread::ThreadMain() (this=0x1ee7da0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:248
#10 0x00007f240274db6d in base::(anonymous namespace)::ThreadFunc(void*) (params=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#11 0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#12 0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 13 (Thread 0x7f23c8ff9700 (LWP 6610)):
#0  0x00007f24156f332b in __lll_lock_wait_private () at /lib64/libc.so.6
#1  0x00007f24156f4f04 in __fprintf_chk () at /lib64/libc.so.6
#2  0x00007f23f73b31ca in event_logv_ () at /lib64/libevent.so.6
#3  0x00007f23f73b3387 in event_warn () at /lib64/libevent.so.6
#4  0x00007f23f73b4c00 in epoll_dispatch () at /lib64/libevent.so.6
#5  0x00007f23f73aaee6 in event_base_loop () at /lib64/libevent.so.6
#6  0x00007f24027035fe in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) (this=0x7f23ac001940, delegate=0x1ee7fb0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_pump_libevent.cc:237
#7  0x00007f2402739998 in base::RunLoop::Run() (this=this@entry=0x7f23c8ff89d0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/run_loop.cc:55
#8  0x00007f2402725295 in base::MessageLoop::Run() (this=this@entry=0x1ee7fb0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_loop.cc:287
#9  0x00007f24027512c8 in base::Thread::Run(base::MessageLoop*) (this=this@entry=0x1ee7ce0, message_loop=message_loop@entry=0x1ee7fb0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:198
#10 0x00007f2401cb8c58 in content::BrowserThreadImpl::FileThreadRun(base::MessageLoop*) (this=this@entry=0x1ee7ce0, message_loop=message_loop@entry=0x1ee7fb0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/content/browser/browser_thread_impl.cc:184
#11 0x00007f2401cb90ab in content::BrowserThreadImpl::Run(base::MessageLoop*) (this=0x1ee7ce0, message_loop=0x1ee7fb0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/content/browser/browser_thread_impl.cc:238
#12 0x00007f2402751518 in base::Thread::ThreadMain() (this=0x1ee7ce0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:248
#13 0x00007f240274db6d in base::(anonymous namespace)::ThreadFunc(void*) (params=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#14 0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#15 0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 12 (Thread 0x7f23c97fa700 (LWP 6609)):
#0  0x00007f240bdb4c4f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f240274672f in base::WaitableEvent::TimedWait(base::TimeDelta const&) (this=this@entry=0x7f23b40018c0, max_time=...) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:214
#2  0x00007f2402746807 in base::WaitableEvent::Wait() (this=this@entry=0x7f23b40018c0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:154
#3  0x00007f2402728ddb in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) (this=0x7f23b40018b0, delegate=0x1ecff80) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_pump_default.cc:52
#4  0x00007f2402739998 in base::RunLoop::Run() (this=this@entry=0x7f23c97f99d0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/run_loop.cc:55
#5  0x00007f2402725295 in base::MessageLoop::Run() (this=this@entry=0x1ecff80) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_loop.cc:287
#6  0x00007f24027512c8 in base::Thread::Run(base::MessageLoop*) (this=this@entry=0x1ecf250, message_loop=message_loop@entry=0x1ecff80) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:198
#7  0x00007f2401cb8ba8 in content::BrowserThreadImpl::DBThreadRun(base::MessageLoop*) (this=this@entry=0x1ecf250, message_loop=message_loop@entry=0x1ecff80) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/content/browser/browser_thread_impl.cc:177
#8  0x00007f2401cb909b in content::BrowserThreadImpl::Run(base::MessageLoop*) (this=0x1ecf250, message_loop=0x1ecff80) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/content/browser/browser_thread_impl.cc:236
#9  0x00007f2402751518 in base::Thread::ThreadMain() (this=0x1ecf250) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:248
#10 0x00007f240274db6d in base::(anonymous namespace)::ThreadFunc(void*) (params=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#11 0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#12 0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 11 (Thread 0x7f23c9ffb700 (LWP 6608)):
#0  0x00007f240bdb4ff8 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f2402745f12 in base::ConditionVariable::TimedWait(base::TimeDelta const&) (this=this@entry=0x7f23b8007588, max_time=...) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/synchronization/condition_variable_posix.cc:102
#2  0x00007f2402754179 in base::PosixDynamicThreadPool::WaitForTask() (this=0x7f23b8007530) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/worker_pool_posix.cc:177
#3  0x00007f24027546b3 in base::(anonymous namespace)::WorkerThread::ThreadMain() (this=0x7f23b8007b30) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/worker_pool_posix.cc:83
#4  0x00007f240274db6d in base::(anonymous namespace)::ThreadFunc(void*) (params=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#5  0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#6  0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 10 (Thread 0x7f23ca7fc700 (LWP 6607)):
#0  0x00007f240bdb4ff8 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f2402745f12 in base::ConditionVariable::TimedWait(base::TimeDelta const&) (this=this@entry=0x7f23b8007588, max_time=...) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/synchronization/condition_variable_posix.cc:102
#2  0x00007f2402754179 in base::PosixDynamicThreadPool::WaitForTask() (this=0x7f23b8007530) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/worker_pool_posix.cc:177
#3  0x00007f24027546b3 in base::(anonymous namespace)::WorkerThread::ThreadMain() (this=0x7f23b8007870) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/worker_pool_posix.cc:83
#4  0x00007f240274db6d in base::(anonymous namespace)::ThreadFunc(void*) (params=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#5  0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#6  0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 9 (Thread 0x7f23caffd700 (LWP 6606)):
#0  0x00007f240bdb4c4f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f240274672f in base::WaitableEvent::TimedWait(base::TimeDelta const&) (this=this@entry=0x7f23bc0018c0, max_time=...) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:214
#2  0x00007f2402746807 in base::WaitableEvent::Wait() (this=this@entry=0x7f23bc0018c0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/synchronization/waitable_event_posix.cc:154
#3  0x00007f2402728ddb in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) (this=0x7f23bc0018b0, delegate=0x7f23b8006690) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_pump_default.cc:52
#4  0x00007f2402739998 in base::RunLoop::Run() (this=this@entry=0x7f23caffcd60) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/run_loop.cc:55
#5  0x00007f2402725295 in base::MessageLoop::Run() (this=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_loop.cc:287
#6  0x00007f2402751496 in base::Thread::Run(base::MessageLoop*) (message_loop=<optimized out>, this=0x7f2404e478b8 <base::(anonymous namespace)::g_inotify_reader+88>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:198
#7  0x00007f2402751496 in base::Thread::ThreadMain() (this=0x7f2404e478b8 <base::(anonymous namespace)::g_inotify_reader+88>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:248
#8  0x00007f240274db6d in base::(anonymous namespace)::ThreadFunc(void*) (params=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#9  0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#10 0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7f23cb7fe700 (LWP 6605)):
#0  0x00007f24156f332b in __lll_lock_wait_private () at /lib64/libc.so.6
#1  0x00007f24156f4f04 in __fprintf_chk () at /lib64/libc.so.6
#2  0x00007f23f73b31ca in event_logv_ () at /lib64/libevent.so.6
#3  0x00007f23f73b3387 in event_warn () at /lib64/libevent.so.6
#4  0x00007f23f73b4c00 in epoll_dispatch () at /lib64/libevent.so.6
#5  0x00007f23f73aaee6 in event_base_loop () at /lib64/libevent.so.6
#6  0x00007f2402703691 in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) (this=0x7f23b8001940, delegate=0x1ea3ba0) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_pump_libevent.cc:260
#7  0x00007f2402739998 in base::RunLoop::Run() (this=this@entry=0x7f23cb7fdd60) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/run_loop.cc:55
#8  0x00007f2402725295 in base::MessageLoop::Run() (this=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/message_loop/message_loop.cc:287
#9  0x00007f2402751496 in base::Thread::Run(base::MessageLoop*) (message_loop=<optimized out>, this=0x1ea2c30) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:198
#10 0x00007f2402751496 in base::Thread::ThreadMain() (this=0x1ea2c30) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/thread.cc:248
#11 0x00007f240274db6d in base::(anonymous namespace)::ThreadFunc(void*) (params=<optimized out>) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/3rdparty/chromium/base/threading/platform_thread_posix.cc:76
#12 0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#13 0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7f23da2fe700 (LWP 6595)):
#0  0x00007f24156d592d in read () at /lib64/libc.so.6
#1  0x00007f240b5c5690 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007f240b58179e in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007f240b581c38 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007f240b581d9c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007f2416201e2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f23c40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#6  0x00007f24161ad49a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f23da2fdda0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:206
#7  0x00007f2415fe73bc in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:500
#8  0x00007f2415febff9 in QThreadPrivate::start(void*) (arg=0x1c3d3f0) at thread/qthread_unix.cpp:365
#9  0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#10 0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f23daaff700 (LWP 6594)):
#0  0x00007f240b5c6959 in g_mutex_lock () at /lib64/libglib-2.0.so.0
#1  0x00007f240b581b98 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f240b581d9c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f2416201e2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f23d00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#4  0x00007f24161ad49a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f23daafeda0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:206
#5  0x00007f2415fe73bc in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:500
#6  0x00007f2415febff9 in QThreadPrivate::start(void*) (arg=0x1c65600) at thread/qthread_unix.cpp:365
#7  0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#8  0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f23db387700 (LWP 6593)):
#0  0x00007f2415fe4848 in std::__atomic_base<QMutexData*>::compare_exchange_strong(QMutexData*&, QMutexData*, std::memory_order, std::memory_order) (__m2=<optimized out>, __m1=std::memory_order_release, __p2=0x0, __p1=@0x7f23db386ba0: 0x1, this=0x1c22f98) at /usr/include/c++/5.4.0/bits/atomic_base.h:752
#1  0x00007f2415fe4848 in std::atomic<QMutexData*>::compare_exchange_strong(QMutexData*&, QMutexData*, std::memory_order) (__m=std::memory_order_release, __p2=0x0, __p1=@0x7f23db386ba0: 0x1, this=0x1c22f98) at /usr/include/c++/5.4.0/atomic:479
#2  0x00007f2415fe4848 in QAtomicOps<QMutexData*>::testAndSetRelease<QMutexData*>(std::atomic<QMutexData*>&, QMutexData*, QMutexData*, QMutexData**) (currentValue=<synthetic pointer>, newValue=0x0, expectedValue=0x1, _q_value=...) at ../../src/corelib/arch/qatomic_cxx11.h:167
#3  0x00007f2415fe4848 in QBasicAtomicPointer<QMutexData>::testAndSetRelease(QMutexData*, QMutexData*, QMutexData*&) (currentValue=<synthetic pointer>: <optimized out>, newValue=0x0, expectedValue=<optimized out>, this=this@entry=0x1c22f98) at ../../src/corelib/thread/qbasicatomic.h:278
#4  0x00007f2415fe4848 in QBasicMutex::fastTryUnlock(QMutexData*&) (current=<synthetic pointer>: <optimized out>, this=this@entry=0x1c22f98) at thread/qmutex.h:85
#5  0x00007f2415fe4848 in QMutex::unlock() (this=this@entry=0x1c22f98) at thread/qmutex.cpp:271
#6  0x00007f2416201605 in QMutexLocker::unlock() (this=<synthetic pointer>) at ../../src/corelib/thread/qmutex.h:138
#7  0x00007f2416201605 in QMutexLocker::~QMutexLocker() (this=<synthetic pointer>, __in_chrg=<optimized out>) at ../../src/corelib/thread/qmutex.h:132
#8  0x00007f2416201605 in QThreadData::canWaitLocked() (this=<optimized out>) at ../../src/corelib/thread/qthread_p.h:246
#9  0x00007f2416201605 in postEventSourcePrepare (timeout=<synthetic pointer>, s=0x7f23cc0012d0) at kernel/qeventdispatcher_glib.cpp:253
#10 0x00007f2416201605 in postEventSourceCheck(GSource*) (source=0x7f23cc0012d0) at kernel/qeventdispatcher_glib.cpp:263
#11 0x00007f240b5816d1 in g_main_context_check () at /lib64/libglib-2.0.so.0
#12 0x00007f240b581c38 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#13 0x00007f240b581d9c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#14 0x00007f2416201e2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f23cc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#15 0x00007f24161ad49a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f23db386da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:206
#16 0x00007f2415fe73bc in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:500
#17 0x00007f2415febff9 in QThreadPrivate::start(void*) (arg=0x1c12e00) at thread/qthread_unix.cpp:365
#18 0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#19 0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f23dc59f700 (LWP 6592)):
#0  0x00007f24156d592d in read () at /lib64/libc.so.6
#1  0x00007f240b5c5690 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007f240b58179e in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007f240b581c38 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007f240b581d9c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007f2416201e2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f23d40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#6  0x00007f24161ad49a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f23dc59ed70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:206
#7  0x00007f2415fe73bc in QThread::exec() (this=this@entry=0x7f2418346d40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:500
#8  0x00007f24182d5635 in QDBusConnectionManager::run() (this=0x7f2418346d40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:189
#9  0x00007f2415febff9 in QThreadPrivate::start(void*) (arg=0x7f2418346d40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:365
#10 0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#11 0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f23dd447700 (LWP 6591)):
#0  0x00007f240bdb4c4f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f23e4dc1e2b in util_queue_thread_func () at /usr/lib64/dri/nouveau_dri.so
#2  0x00007f23e4dc1b97 in impl_thrd_routine () at /usr/lib64/dri/nouveau_dri.so
#3  0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#4  0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f23e679f700 (LWP 6590)):
#0  0x00007f24156da00d in poll () at /lib64/libc.so.6
#1  0x00007f2409124902 in _xcb_conn_wait () at /lib64/libxcb.so.1
#2  0x00007f2409126657 in xcb_wait_for_event () at /lib64/libxcb.so.1
#3  0x00007f23e82a2be9 in QXcbEventReader::run() (this=0x1a75450) at qxcbconnection.cpp:1331
#4  0x00007f2415febff9 in QThreadPrivate::start(void*) (arg=0x1a75450) at thread/qthread_unix.cpp:365
#5  0x00007f240bdaf66d in start_thread () at /lib64/libpthread.so.0
#6  0x00007f24156e5e4d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f2415386840 (LWP 6588)):
#0  0x00007f240bdb4c4f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f2415fecdfb in QWaitConditionPrivate::wait(unsigned long) (time=18446744073709551615, this=0x24882b0) at thread/qwaitcondition_unix.cpp:136
#2  0x00007f2415fecdfb in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x245f388, mutex=mutex@entry=0x245f390, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007f240129c192 in QtWebEngineCore::DelegatedFrameNode::preprocess() (this=0x245f280) at /usr/src/debug/qtwebengine-opensource-src-5.6.2/src/core/delegated_frame_node.cpp:464
#4  0x00007f24000aeaf7 in QSGRenderer::preprocess() () at /lib64/libQt5Quick.so.5
#5  0x00007f24000ae0ef in QSGRenderer::renderScene(QSGBindable const&) () at /lib64/libQt5Quick.so.5
#6  0x00007f24000ae967 in QSGRenderer::renderScene(unsigned int) () at /lib64/libQt5Quick.so.5
#7  0x00007f24182673c9 in QtWebEngineCore::RenderWidgetHostViewQtDelegateWidget::paintGL() (this=0x20728c0) at render_widget_host_view_qt_delegate_widget.cpp:389
#8  0x00007f2416b2d2ed in QOpenGLWidgetPrivate::invokeUserPaint() (this=0x1f68d50) at kernel/qopenglwidget.cpp:823
#9  0x00007f2416b0e2c8 in QWidget::event(QEvent*) (this=this@entry=0x20728c0, event=event@entry=0x7ffc1a7a2740) at kernel/qwidget.cpp:9117
#10 0x00007f2416b2e2c3 in QOpenGLWidget::event(QEvent*) (this=this@entry=0x20728c0, e=e@entry=0x7ffc1a7a2740) at kernel/qopenglwidget.cpp:1344
#11 0x00007f241826770b in QtWebEngineCore::RenderWidgetHostViewQtDelegateWidget::event(QEvent*) (this=0x20728c0, event=0x7ffc1a7a2740) at render_widget_host_view_qt_delegate_widget.cpp:353
#12 0x00007f2416acbd0c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=<optimized out>, receiver=0x20728c0, e=0x7ffc1a7a2740) at kernel/qapplication.cpp:3804
#13 0x00007f2416ad0e76 in QApplication::notify(QObject*, QEvent*) (this=0x7ffc1a7a3540, receiver=0x20728c0, e=0x7ffc1a7a2740) at kernel/qapplication.cpp:3561
#14 0x00007f24161af628 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=receiver@entry=0x20728c0, event=event@entry=0x7ffc1a7a2740) at kernel/qcoreapplication.cpp:1015
#15 0x00007f2416b0774a in QCoreApplication::sendSpontaneousEvent(QObject*, QEvent*) (event=0x7ffc1a7a2740, receiver=<optimized out>) at ../../src/corelib/kernel/qcoreapplication.h:228
#16 0x00007f2416b0774a in QWidgetPrivate::sendPaintEvent(QRegion const&) (this=0x1f68d50, toBePainted=...) at kernel/qwidget.cpp:5671
#17 0x00007f2416ad8c8d in QWidgetBackingStore::doSync() (this=this@entry=0x215b610) at kernel/qwidgetbackingstore.cpp:1300
#18 0x00007f2416ad9721 in QWidgetBackingStore::sync() (this=0x215b610) at kernel/qwidgetbackingstore.cpp:1173
#19 0x00007f2416af7a8f in QWidgetPrivate::syncBackingStore() (this=0x1ca6ee0) at kernel/qwidget.cpp:1947
#20 0x00007f2416b0e378 in QWidget::event(QEvent*) (this=this@entry=0x1ca6c20, event=event@entry=0x238b920) at kernel/qwidget.cpp:9056
#21 0x00007f2416c1e92b in QMainWindow::event(QEvent*) (this=0x1ca6c20, event=0x238b920) at widgets/qmainwindow.cpp:1543
#22 0x00007f24150fa817 in KMainWindow::event(QEvent*) () at /lib64/libKF5XmlGui.so.5
#23 0x00007f241513dc45 in KXmlGuiWindow::event(QEvent*) () at /lib64/libKF5XmlGui.so.5
#24 0x00007f2416acbd0c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=<optimized out>, receiver=0x1ca6c20, e=0x238b920) at kernel/qapplication.cpp:3804
#25 0x00007f2416ad0e76 in QApplication::notify(QObject*, QEvent*) (this=0x7ffc1a7a3540, receiver=0x1ca6c20, e=0x238b920) at kernel/qapplication.cpp:3561
#26 0x00007f24161af628 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x1ca6c20, event=event@entry=0x238b920) at kernel/qcoreapplication.cpp:1015
#27 0x00007f24161b144b in QCoreApplication::sendEvent(QObject*, QEvent*) (event=0x238b920, receiver=<optimized out>) at kernel/qcoreapplication.h:225
#28 0x00007f24161b144b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1a4dd80) at kernel/qcoreapplication.cpp:1650
#29 0x00007f24161b1918 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1508
#30 0x00007f24162019f3 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x1aa1b60) at kernel/qeventdispatcher_glib.cpp:270
#31 0x00007f240b581ac7 in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#32 0x00007f240b581cf8 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#33 0x00007f240b581d9c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#34 0x00007f2416201e06 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x1aa8c00, flags=...) at kernel/qeventdispatcher_glib.cpp:417
#35 0x00007f24161ad49a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffc1a7a3090, flags=..., flags@entry=...) at kernel/qeventloop.cpp:206
#36 0x00007f24161b57e1 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1285
#37 0x00007f24164ed8ec in QGuiApplication::exec() () at kernel/qguiapplication.cpp:1607
#38 0x00007f2416ac8f15 in QApplication::exec() () at kernel/qapplication.cpp:2979
#39 0x0000000000403cdb in main(int, char**) (argc=1, argv=0x7ffc1a7a3778) at /usr/src/debug/kmail-16.12.3/src/main.cpp:161

Reported using DrKonqi