Bug 394114

Summary: Akregator 5.7.3 crash at opening an article
Product: [Applications] akregator Reporter: Pedro <pedro.gongora>
Component: generalAssignee: kdepim bugs <pim-bugs-null>
Status: RESOLVED UPSTREAM    
Severity: normal    
Priority: NOR    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: Kubuntu   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Pedro 2018-05-11 01:17:39 UTC 
Akregator crashes or hangs when opening some articles. I've noticed that it only happens when the article has large images.
On my machine, the bug presents always, most times it crashes or just hangs, but some times it freezes all the plasma desktop.
I'm using Kubuntu 18.04.

Backtrace:

Starting program: /usr/bin/akregator 
[Depuración de hilo usando libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Nuevo Thread 0x7fffc1fd0700 (LWP 14112)]
[Nuevo Thread 0x7fffb5773700 (LWP 14113)]
[Nuevo Thread 0x7fffb4a87700 (LWP 14114)]
[Nuevo Thread 0x7fffae894700 (LWP 14115)]
[Nuevo Thread 0x7fffae093700 (LWP 14120)]
[Nuevo Thread 0x7fffad892700 (LWP 14121)]
[Nuevo Thread 0x7fffad091700 (LWP 14122)]
[Nuevo Thread 0x7fffac890700 (LWP 14123)]
[Nuevo Thread 0x7fff9bdf1700 (LWP 14124)]
[Nuevo Thread 0x7fff9b5f0700 (LWP 14125)]
[Nuevo Thread 0x7fff9adef700 (LWP 14126)]
[Nuevo Thread 0x7fff9a5ee700 (LWP 14127)]
[Nuevo Thread 0x7fff99ded700 (LWP 14128)]
[Nuevo Thread 0x7fff995ec700 (LWP 14129)]
[Nuevo Thread 0x7fff98deb700 (LWP 14130)]
[Nuevo Thread 0x7fff77fff700 (LWP 14131)]
[Nuevo Thread 0x7fff777fe700 (LWP 14132)]
[Nuevo Thread 0x7fff76ffd700 (LWP 14133)]
[Nuevo Thread 0x7fff767fc700 (LWP 14134)]
[Nuevo Thread 0x7fff75ffb700 (LWP 14135)]
[Nuevo Thread 0x7fff757fa700 (LWP 14136)]
[Nuevo Thread 0x7fff74ff9700 (LWP 14137)]
[Nuevo Thread 0x7fff43fff700 (LWP 14138)]
[Nuevo Thread 0x7fff3ac07700 (LWP 14139)]
[Nuevo Thread 0x7fff398e2700 (LWP 14140)]
[Nuevo Thread 0x7fff33fff700 (LWP 14145)]
[Nuevo Thread 0x7fff32697700 (LWP 14156)]
[Thread 0x7fff32697700 (LWP 14156) terminado]
[Nuevo Thread 0x7fff32697700 (LWP 14192)]

Thread 21 "Chrome_InProcGp" received signal SIGSEGV, Segmentation fault.
[Cambiando a Thread 0x7fff75ffb700 (LWP 14135)]
pushbuf_kref (push=push@entry=0x555555888a70, bo=0x0, flags=0) at ../../nouveau/pushbuf.c:173
173	../../nouveau/pushbuf.c: No existe el archivo o el directorio.

Thread 29 (Thread 0x7fff32697700 (LWP 14192)):
#0  0x00007fffee0caed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fff326967e0, expected=0, futex_word=0x7fffa0004594) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fff32696880, mutex=0x7fffa0004540, cond=0x7fffa0004568) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7fffa0004568, mutex=0x7fffa0004540, abstime=0x7fff32696880) at pthread_cond_wait.c:667
#3  0x00007fffe46d3652 in base::ConditionVariable::TimedWait(base::TimeDelta const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe46a9799 in base::PosixDynamicThreadPool::WaitForTask() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe46a9cfb in base::(anonymous namespace)::WorkerThread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe46a25eb in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffee0c46db in start_thread (arg=0x7fff32697700) at pthread_create.c:463
#8  0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 27 (Thread 0x7fff33fff700 (LWP 14145)):
#0  0x00007fffee0ca9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fffe10d9fb8 <QTWTF::pageheap_memory+57592>) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7fffe10d9f68 <QTWTF::pageheap_memory+57512>, cond=0x7fffe10d9f90 <QTWTF::pageheap_memory+57552>) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7fffe10d9f90 <QTWTF::pageheap_memory+57552>, mutex=0x7fffe10d9f68 <QTWTF::pageheap_memory+57512>) at pthread_cond_wait.c:655
#3  0x00007fffe0de35f4 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7fffe10cbec0 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#4  0x00007fffe0de3639 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#5  0x00007fffee0c46db in start_thread (arg=0x7fff33fff700) at pthread_create.c:463
#6  0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 26 (Thread 0x7fff398e2700 (LWP 14140)):
#0  0x00007fffee0ca9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x555555a32acc) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x555555a32a78, cond=0x555555a32aa0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x555555a32aa0, mutex=0x555555a32a78) at pthread_cond_wait.c:655
#3  0x00007fffe46a4c95 in base::SequencedWorkerPool::Inner::ThreadLoop(base::SequencedWorkerPool::Worker*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe46a5177 in base::SequencedWorkerPool::Worker::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe46a5f11 in base::SimpleThread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe46a25eb in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffee0c46db in start_thread (arg=0x7fff398e2700) at pthread_create.c:463
#8  0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7fff3ac07700 (LWP 14139)):
#0  0x00007fffee0ca9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x555555a77b30) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x555555a77ae0, cond=0x555555a77b08) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x555555a77b08, mutex=0x555555a77ae0) at pthread_cond_wait.c:655
#3  0x00007ffff44ae59b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x555555a77ae0) at thread/qwaitcondition_unix.cpp:143
#4  QWaitCondition::wait (this=this@entry=0x555555b11558, mutex=mutex@entry=0x555555b11550, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#5  0x00007ffff44a6c0b in QSemaphore::acquire (this=0x555555afdbd8, n=1) at thread/qsemaphore.cpp:143
#6  0x00007fff3bbf580c in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/texttospeech/libqttexttospeech_flite.so
#7  0x00007ffff44ad16d in QThreadPrivate::start (arg=0x555555afdba0) at thread/qthread_unix.cpp:368
#8  0x00007fffee0c46db in start_thread (arg=0x7fff3ac07700) at pthread_create.c:463
#9  0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7fff43fff700 (LWP 14138)):
#0  0x00007ffff3d96bf9 in __GI___poll (fds=0x7fff3c004a10, nfds=1, timeout=9990) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffec222439 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7fff3c004a10, timeout=<optimized out>, context=0x7fff3c000bf0) at ../../../../glib/gmain.c:4204
#2  g_main_context_iterate (context=context@entry=0x7fff3c000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3898
#3  0x00007fffec22254c in g_main_context_iteration (context=0x7fff3c000bf0, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3964
#4  0x00007ffff46e48ef in QEventDispatcherGlib::processEvents (this=0x7fff3c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#5  0x00007ffff46899ea in QEventLoop::exec (this=this@entry=0x7fff43ffea20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007ffff44a822a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#7  0x00007ffff44ad16d in QThreadPrivate::start (arg=0x555555b616f0) at thread/qthread_unix.cpp:368
#8  0x00007fffee0c46db in start_thread (arg=0x7fff43fff700) at pthread_create.c:463
#9  0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7fff74ff9700 (LWP 14137)):
#0  0x00007ffff3d96bf9 in __GI___poll (fds=fds@entry=0x7fff5800bd80, nfds=nfds@entry=3, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffdc4f0451 in poll (__timeout=-1, __nfds=3, __fds=0x7fff5800bd80) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  poll_func (ufds=0x7fff5800bd80, nfds=3, timeout=-1, userdata=0x555555b70cf0) at pulse/thread-mainloop.c:69
#3  0x00007fffdc4e1e10 in pa_mainloop_poll (m=m@entry=0x555555b46960) at pulse/mainloop.c:844
#4  0x00007fffdc4e24a0 in pa_mainloop_iterate (m=0x555555b46960, block=<optimized out>, retval=0x0) at pulse/mainloop.c:926
#5  0x00007fffdc4e2530 in pa_mainloop_run (m=0x555555b46960, retval=retval@entry=0x0) at pulse/mainloop.c:944
#6  0x00007fffdc4f0399 in thread (userdata=0x555555b415d0) at pulse/thread-mainloop.c:100
#7  0x00007fffd2c8d2a8 in internal_thread_func (userdata=0x555555b46a60) at pulsecore/thread-posix.c:81
#8  0x00007fffee0c46db in start_thread (arg=0x7fff74ff9700) at pthread_create.c:463
#9  0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7fff757fa700 (LWP 14136)):
#0  0x00007ffff3da3bb7 in epoll_wait (epfd=40, events=events@entry=0x7fff540020f0, maxevents=32, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fffd9cf52c5 in epoll_dispatch (base=0x7fff54001e30, tv=<optimized out>) at epoll.c:462
#2  0x00007fffd9ceb114 in event_base_loop (base=0x7fff54001e30, flags=1) at event.c:1947
#3  0x00007fffe4675b0d in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe4671da8 in base::MessageLoop::RunHandler() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe468e77b in base::RunLoop::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe46a64d6 in base::Thread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe46a25eb in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffee0c46db in start_thread (arg=0x7fff757fa700) at pthread_create.c:463
#9  0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7fff75ffb700 (LWP 14135)):
#0  pushbuf_kref (push=push@entry=0x555555888a70, bo=0x0, flags=0) at ../../nouveau/pushbuf.c:173
#1  0x00007fffba2cd7ed in pushbuf_validate (push=0x555555888a70, retry=<optimized out>) at ../../nouveau/pushbuf.c:506
#2  0x00007fffba2cda5b in nouveau_pushbuf_kick (push=<optimized out>, chan=<optimized out>) at ../../nouveau/pushbuf.c:780
#3  0x00007fffbacef976 in PUSH_KICK (push=<optimized out>) at ../../../../../src/gallium/drivers/nouveau/nouveau_winsys.h:59
#4  nvc0_flush (pipe=0x7fff60010ec0, fence=<optimized out>, flags=<optimized out>) at ../../../../../src/gallium/drivers/nouveau/nvc0/nvc0_context.c:42
#5  0x00007fffba92ff01 in st_flush (flags=0, fence=0x0, st=<optimized out>) at ../../../src/mesa/state_tracker/st_cb_flush.c:55
#6  st_glFlush (ctx=<optimized out>) at ../../../src/mesa/state_tracker/st_cb_flush.c:91
#7  0x00007fffe4fd6dff in gl::GLFence::Create() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe4f6aea3 in gpu::gles2::CommandsCompletedQuery::End(int) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffe4ef0f71 in gpu::gles2::GLES2DecoderImpl::HandleEndQueryEXT(unsigned int, void const volatile*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fffe4f1effd in gpu::error::Error gpu::gles2::GLES2DecoderImpl::DoCommandsImpl<false>(unsigned int, void const volatile*, int, int*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fffe4f8842a in gpu::CommandParser::ProcessCommands(int) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fffe4edd21a in gpu::CommandExecutor::PutChanged() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007fffe78b9c53 in gpu::GpuCommandBufferStub::OnAsyncFlush(int, unsigned int, std::vector<ui::LatencyInfo, std::allocator<ui::LatencyInfo> > const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007fffe78bd700 in gpu::GpuCommandBufferStub::OnMessageReceived(IPC::Message const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007fffe783c08c in IPC::MessageRouter::RouteMessage(IPC::Message const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007fffe78b7662 in gpu::GpuChannel::HandleMessageHelper(IPC::Message const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#17 0x00007fffe78b771e in gpu::GpuChannel::HandleMessage(scoped_refptr<gpu::GpuChannelMessageQueue> const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#18 0x00007fffe46cea83 in base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#19 0x00007fffe4672a00 in base::MessageLoop::RunTask(base::PendingTask*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#20 0x00007fffe4674058 in base::MessageLoop::DeferOrRunPendingTask(base::PendingTask) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#21 0x00007fffe46743eb in base::MessageLoop::DoWork() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#22 0x00007fffe4675491 in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#23 0x00007fffe4671da8 in base::MessageLoop::RunHandler() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#24 0x00007fffe468e77b in base::RunLoop::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#25 0x00007fffe46a64d6 in base::Thread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#26 0x00007fffe46a25eb in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#27 0x00007fffee0c46db in start_thread (arg=0x7fff75ffb700) at pthread_create.c:463
#28 0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7fff767fc700 (LWP 14134)):
#0  0x00007fffee0caed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fff767fb5d0, expected=0, futex_word=0x7fff767fb758) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fff767fb670, mutex=0x7fff767fb708, cond=0x7fff767fb730) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7fff767fb730, mutex=0x7fff767fb708, abstime=0x7fff767fb670) at pthread_cond_wait.c:667
#3  0x00007fffe46d3652 in base::ConditionVariable::TimedWait(base::TimeDelta const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe469a91e in base::WaitableEvent::TimedWait(base::TimeDelta const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe467552b in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4671da8 in base::MessageLoop::RunHandler() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe468e77b in base::RunLoop::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe46a64d6 in base::Thread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffe46a25eb in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fffee0c46db in start_thread (arg=0x7fff767fc700) at pthread_create.c:463
#11 0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7fff76ffd700 (LWP 14133)):
#0  0x00007fffee0ca9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x555555a7b0f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x555555a7b038, cond=0x555555a7b0d0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x555555a7b0d0, mutex=0x555555a7b038) at pthread_cond_wait.c:655
#3  0x00007fffe4e2c060 in cc::SingleThreadTaskGraphRunner::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe46a5f11 in base::SimpleThread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe46a25eb in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffee0c46db in start_thread (arg=0x7fff76ffd700) at pthread_create.c:463
#7  0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7fff777fe700 (LWP 14132)):
#0  0x00007fffee0ca9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fff777fd738) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7fff777fd6e8, cond=0x7fff777fd710) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7fff777fd710, mutex=0x7fff777fd6e8) at pthread_cond_wait.c:655
#3  0x00007fffe469a999 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe469a9c7 in base::WaitableEvent::Wait() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe46754db in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4671da8 in base::MessageLoop::RunHandler() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe468e77b in base::RunLoop::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe46a64d6 in base::Thread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffe46a25eb in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fffee0c46db in start_thread (arg=0x7fff777fe700) at pthread_create.c:463
#11 0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7fff77fff700 (LWP 14131)):
#0  0x00007fffee0ca9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x555555a32acc) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x555555a32a78, cond=0x555555a32aa0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x555555a32aa0, mutex=0x555555a32a78) at pthread_cond_wait.c:655
#3  0x00007fffe46a4c95 in base::SequencedWorkerPool::Inner::ThreadLoop(base::SequencedWorkerPool::Worker*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe46a5177 in base::SequencedWorkerPool::Worker::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe46a5f11 in base::SimpleThread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe46a25eb in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffee0c46db in start_thread (arg=0x7fff77fff700) at pthread_create.c:463
#8  0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7fff98deb700 (LWP 14130)):
#0  0x00007ffff3da3bb7 in epoll_wait (epfd=35, events=events@entry=0x7fff700020d0, maxevents=32, timeout=timeout@entry=1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fffd9cf52c5 in epoll_dispatch (base=0x7fff70001e10, tv=<optimized out>) at epoll.c:462
#2  0x00007fffd9ceb114 in event_base_loop (base=0x7fff70001e10, flags=1) at event.c:1947
#3  0x00007fffe4675bf3 in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe4671da8 in base::MessageLoop::RunHandler() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe468e77b in base::RunLoop::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe3f2c978 in content::BrowserThreadImpl::IOThreadRun(base::RunLoop*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe3f2cf2b in content::BrowserThreadImpl::Run(base::RunLoop*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe46a6588 in base::Thread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffe46a25eb in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fffee0c46db in start_thread (arg=0x7fff98deb700) at pthread_create.c:463
#11 0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7fff995ec700 (LWP 14129)):
#0  0x00007fffee0ca9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fff995eb358) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7fff995eb308, cond=0x7fff995eb330) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7fff995eb330, mutex=0x7fff995eb308) at pthread_cond_wait.c:655
#3  0x00007fffe469a999 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe469a9c7 in base::WaitableEvent::Wait() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe46754db in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4671da8 in base::MessageLoop::RunHandler() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe468e77b in base::RunLoop::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe3f2c8c8 in content::BrowserThreadImpl::CacheThreadRun(base::RunLoop*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffe3f2cf1b in content::BrowserThreadImpl::Run(base::RunLoop*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fffe46a6588 in base::Thread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fffe46a25eb in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fffee0c46db in start_thread (arg=0x7fff995ec700) at pthread_create.c:463
#13 0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7fff99ded700 (LWP 14128)):
#0  0x00007fffee0ca9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fff99dec358) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7fff99dec308, cond=0x7fff99dec330) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7fff99dec330, mutex=0x7fff99dec308) at pthread_cond_wait.c:655
#3  0x00007fffe469a999 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe469a9c7 in base::WaitableEvent::Wait() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe46754db in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4671da8 in base::MessageLoop::RunHandler() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe468e77b in base::RunLoop::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe3f2c818 in content::BrowserThreadImpl::ProcessLauncherThreadRun(base::RunLoop*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffe3f2cf0b in content::BrowserThreadImpl::Run(base::RunLoop*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fffe46a6588 in base::Thread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fffe46a25eb in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fffee0c46db in start_thread (arg=0x7fff99ded700) at pthread_create.c:463
#13 0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7fff9a5ee700 (LWP 14127)):
#0  0x00007fffee0ca9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fff9a5ed358) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7fff9a5ed308, cond=0x7fff9a5ed330) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7fff9a5ed330, mutex=0x7fff9a5ed308) at pthread_cond_wait.c:655
#3  0x00007fffe469a999 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe469a9c7 in base::WaitableEvent::Wait() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe46754db in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4671da8 in base::MessageLoop::RunHandler() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe468e77b in base::RunLoop::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe3f2c768 in content::BrowserThreadImpl::FileUserBlockingThreadRun(base::RunLoop*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffe3f2cefb in content::BrowserThreadImpl::Run(base::RunLoop*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fffe46a6588 in base::Thread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fffe46a25eb in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fffee0c46db in start_thread (arg=0x7fff9a5ee700) at pthread_create.c:463
#13 0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7fff9adef700 (LWP 14126)):
#0  0x00007ffff3da3bb7 in epoll_wait (epfd=29, events=events@entry=0x7fff800020d0, maxevents=32, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fffd9cf52c5 in epoll_dispatch (base=0x7fff80001e10, tv=<optimized out>) at epoll.c:462
#2  0x00007fffd9ceb114 in event_base_loop (base=0x7fff80001e10, flags=1) at event.c:1947
#3  0x00007fffe4675b0d in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe4671da8 in base::MessageLoop::RunHandler() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe468e77b in base::RunLoop::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe3f2c6b8 in content::BrowserThreadImpl::FileThreadRun(base::RunLoop*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe3f2ceeb in content::BrowserThreadImpl::Run(base::RunLoop*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe46a6588 in base::Thread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffe46a25eb in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fffee0c46db in start_thread (arg=0x7fff9adef700) at pthread_create.c:463
#11 0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fff9b5f0700 (LWP 14125)):
#0  0x00007fffee0ca9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fff9b5ef358) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7fff9b5ef308, cond=0x7fff9b5ef330) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7fff9b5ef330, mutex=0x7fff9b5ef308) at pthread_cond_wait.c:655
#3  0x00007fffe469a999 in base::WaitableEvent::TimedWait(base::TimeDelta const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe469a9c7 in base::WaitableEvent::Wait() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe46754db in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4671da8 in base::MessageLoop::RunHandler() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe468e77b in base::RunLoop::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe3f2c608 in content::BrowserThreadImpl::DBThreadRun(base::RunLoop*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffe3f2cedb in content::BrowserThreadImpl::Run(base::RunLoop*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fffe46a6588 in base::Thread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fffe46a25eb in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fffee0c46db in start_thread (arg=0x7fff9b5f0700) at pthread_create.c:463
#13 0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fff9bdf1700 (LWP 14124)):
#0  0x00007fffee0caed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fff9bdf07e0, expected=0, futex_word=0x7fffa0004594) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fff9bdf0880, mutex=0x7fffa0004540, cond=0x7fffa0004568) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7fffa0004568, mutex=0x7fffa0004540, abstime=0x7fff9bdf0880) at pthread_cond_wait.c:667
#3  0x00007fffe46d3652 in base::ConditionVariable::TimedWait(base::TimeDelta const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe46a9799 in base::PosixDynamicThreadPool::WaitForTask() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe46a9cfb in base::(anonymous namespace)::WorkerThread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe46a25eb in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffee0c46db in start_thread (arg=0x7fff9bdf1700) at pthread_create.c:463
#8  0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fffac890700 (LWP 14123)):
#0  0x00007fffee0caed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fffac88f7e0, expected=0, futex_word=0x7fffa0004594) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fffac88f880, mutex=0x7fffa0004540, cond=0x7fffa0004568) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7fffa0004568, mutex=0x7fffa0004540, abstime=0x7fffac88f880) at pthread_cond_wait.c:667
#3  0x00007fffe46d3652 in base::ConditionVariable::TimedWait(base::TimeDelta const&) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe46a9799 in base::PosixDynamicThreadPool::WaitForTask() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe46a9cfb in base::(anonymous namespace)::WorkerThread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe46a25eb in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffee0c46db in start_thread (arg=0x7fffac890700) at pthread_create.c:463
#8  0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fffad091700 (LWP 14122)):
#0  0x00007ffff3d9903f in __GI___select (nfds=29, readfds=0x7fffad0901c0, writefds=0x0, exceptfds=0x0, timeout=0x0) at ../sysdeps/unix/sysv/linux/select.c:41
#1  0x00007fffe77f6ccf in base::(anonymous namespace)::InotifyReaderCallback(base::(anonymous namespace)::InotifyReader*, int) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fffe46cea83 in base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fffe4672a00 in base::MessageLoop::RunTask(base::PendingTask*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe4674058 in base::MessageLoop::DeferOrRunPendingTask(base::PendingTask) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe46743eb in base::MessageLoop::DoWork() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4675491 in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe4671da8 in base::MessageLoop::RunHandler() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe468e77b in base::RunLoop::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffe46a64d6 in base::Thread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fffe46a25eb in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fffee0c46db in start_thread (arg=0x7fffad091700) at pthread_create.c:463
#12 0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fffad892700 (LWP 14121)):
#0  0x00007ffff3da3bb7 in epoll_wait (epfd=22, events=events@entry=0x7fffa00020f0, maxevents=32, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fffd9cf52c5 in epoll_dispatch (base=0x7fffa0001e30, tv=<optimized out>) at epoll.c:462
#2  0x00007fffd9ceb114 in event_base_loop (base=0x7fffa0001e30, flags=1) at event.c:1947
#3  0x00007fffe4675b0d in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe4671da8 in base::MessageLoop::RunHandler() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe468e77b in base::RunLoop::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe46a64d6 in base::Thread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe46a25eb in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffee0c46db in start_thread (arg=0x7fffad892700) at pthread_create.c:463
#9  0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fffae093700 (LWP 14120)):
#0  0x00007ffff3d666c2 in __GI___waitpid (pid=14117, stat_loc=0x0, options=0) at ../sysdeps/unix/sysv/linux/waitpid.c:30
#1  0x00007fffe468a4be in base::(anonymous namespace)::BackgroundReaper::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fffe46a25eb in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fffee0c46db in start_thread (arg=0x7fffae093700) at pthread_create.c:463
#4  0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fffae894700 (LWP 14115)):
#0  0x00007ffff3d96bf9 in __GI___poll (fds=0x7fffae893840, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffe41a06d2 in content::SandboxIPCHandler::Run() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fffe46a5f11 in base::SimpleThread::ThreadMain() () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fffe46a25eb in base::(anonymous namespace)::ThreadFunc(void*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffee0c46db in start_thread (arg=0x7fffae894700) at pthread_create.c:463
#5  0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fffb4a87700 (LWP 14114)):
#0  0x00007ffff3d96bf9 in __GI___poll (fds=0x7fffa801b0b0, nfds=5, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffec222439 in g_main_context_poll (priority=<optimized out>, n_fds=5, fds=0x7fffa801b0b0, timeout=<optimized out>, context=0x7fffa8000bf0) at ../../../../glib/gmain.c:4204
#2  g_main_context_iterate (context=context@entry=0x7fffa8000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3898
#3  0x00007fffec22254c in g_main_context_iteration (context=0x7fffa8000bf0, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3964
#4  0x00007ffff46e48ef in QEventDispatcherGlib::processEvents (this=0x7fffa8000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#5  0x00007ffff46899ea in QEventLoop::exec (this=this@entry=0x7fffb4a869f0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007ffff44a822a in QThread::exec (this=this@entry=0x7ffff631fd60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:515
#7  0x00007ffff60acd45 in QDBusConnectionManager::run (this=0x7ffff631fd60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#8  0x00007ffff44ad16d in QThreadPrivate::start (arg=0x7ffff631fd60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:368
#9  0x00007fffee0c46db in start_thread (arg=0x7fffb4a87700) at pthread_create.c:463
#10 0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fffb5773700 (LWP 14113)):
#0  0x00007fffee0ca9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55555588b020) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55555588afd0, cond=0x55555588aff8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55555588aff8, mutex=0x55555588afd0) at pthread_cond_wait.c:655
#3  0x00007fffbaa1fb7b in cnd_wait (mtx=0x55555588afd0, cond=0x55555588aff8) at ../../../include/c11/threads_posix.h:155
#4  util_queue_thread_func (input=input@entry=0x55555588b520) at ../../../src/util/u_queue.c:255
#5  0x00007fffbaa1f8a7 in impl_thrd_routine (p=<optimized out>) at ../../../include/c11/threads_posix.h:87
#6  0x00007fffee0c46db in start_thread (arg=0x7fffb5773700) at pthread_create.c:463
#7  0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fffc1fd0700 (LWP 14112)):
#0  0x00007ffff3d96bf9 in __GI___poll (fds=fds@entry=0x7fffc1fcf928, nfds=nfds@entry=1, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffebfb9747 in poll (__timeout=-1, __nfds=1, __fds=0x7fffc1fcf928) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  _xcb_conn_wait (c=c@entry=0x5555557b5c30, cond=cond@entry=0x5555557b5c70, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:479
#3  0x00007fffebfbb36a in xcb_wait_for_event (c=0x5555557b5c30) at ../../src/xcb_in.c:697
#4  0x00007fffc3ccb2a9 in QXcbEventReader::run (this=0x5555557c8d70) at qxcbconnection.cpp:1330
#5  0x00007ffff44ad16d in QThreadPrivate::start (arg=0x5555557c8d70) at thread/qthread_unix.cpp:368
#6  0x00007fffee0c46db in start_thread (arg=0x7fffc1fd0700) at pthread_create.c:463
#7  0x00007ffff3da388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7ffff7f4e0c0 (LWP 14107)):
#0  0x00007ffff3d85e57 in sched_yield () at ../sysdeps/unix/syscall-template.S:78
#1  0x00007fffbabff1d9 in nouveau_fence_wait (fence=0x7fff601c14a0, debug=0x0) at ../../../../../src/gallium/drivers/nouveau/nouveau_fence.c:216
#2  0x00007fffba92ffa0 in st_finish (st=st@entry=0x555555f02c40) at ../../../src/mesa/state_tracker/st_cb_flush.c:69
#3  0x00007fffba92fff0 in st_glFinish (ctx=<optimized out>) at ../../../src/mesa/state_tracker/st_cb_flush.c:104
#4  0x00007fffe19d6d97 in QQuickWidgetPrivate::render (this=this@entry=0x555555a33830, needsSync=needsSync@entry=true) at qquickwidget.cpp:295
#5  0x00007fffe19d6f72 in QQuickWidgetPrivate::renderSceneGraph (this=0x555555a33830) at qquickwidget.cpp:339
#6  0x00007ffff46bb0db in QObject::event (this=this@entry=0x555555c7f260, e=e@entry=0x7fffffffdfc0) at kernel/qobject.cpp:1269
#7  0x00007ffff5448743 in QWidget::event (this=this@entry=0x555555c7f260, event=event@entry=0x7fffffffdfc0) at kernel/qwidget.cpp:9346
#8  0x00007fffe19da9eb in QQuickWidget::event (this=0x555555c7f260, e=0x7fffffffdfc0) at qquickwidget.cpp:1501
#9  0x00007ffff1c72b1b in QtWebEngineCore::RenderWidgetHostViewQtDelegateWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineWidgets.so.5
#10 0x00007ffff540982c in QApplicationPrivate::notify_helper (this=this@entry=0x5555557a8080, receiver=receiver@entry=0x555555c7f260, e=e@entry=0x7fffffffdfc0) at kernel/qapplication.cpp:3722
#11 0x00007ffff54110f4 in QApplication::notify (this=0x7fffffffe3b0, receiver=0x555555c7f260, e=0x7fffffffdfc0) at kernel/qapplication.cpp:3481
#12 0x00007ffff468b9a8 in QCoreApplication::notifyInternal2 (receiver=0x555555c7f260, event=event@entry=0x7fffffffdfc0) at kernel/qcoreapplication.cpp:1024
#13 0x00007ffff46e3d8e in QCoreApplication::sendEvent (event=0x7fffffffdfc0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:233
#14 QTimerInfoList::activateTimers (this=this@entry=0x5555557ef920) at kernel/qtimerinfo_unix.cpp:643
#15 0x00007ffff46e4551 in timerSourceDispatch (source=source@entry=0x5555557ef8c0) at kernel/qeventdispatcher_glib.cpp:182
#16 0x00007fffec222287 in g_main_dispatch (context=0x7fffbc004ff0) at ../../../../glib/gmain.c:3177
#17 g_main_context_dispatch (context=context@entry=0x7fffbc004ff0) at ../../../../glib/gmain.c:3830
#18 0x00007fffec2224c0 in g_main_context_iterate (context=context@entry=0x7fffbc004ff0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3903
#19 0x00007fffec22254c in g_main_context_iteration (context=0x7fffbc004ff0, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3964
#20 0x00007ffff46e48ef in QEventDispatcherGlib::processEvents (this=0x5555558086d0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#21 0x00007ffff46899ea in QEventLoop::exec (this=this@entry=0x7fffffffe210, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#22 0x00007ffff4692a84 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1297
#23 0x000055555555ca60 in main (argc=<optimized out>, argv=<optimized out>) at ./src/main.cpp:126
Comment 1 Pedro 2018-05-11 02:41:01 UTC 
I've tracked the problem, and it seems to be a known bug in nouveau drivers.
Here are the related QT and nouveau bug reports:
https://bugreports.qt.io/browse/QTBUG-41242
https://bugs.freedesktop.org/show_bug.cgi?id=91632
Comment 2 Christoph Feck 2018-05-11 02:55:37 UTC 
Correct.