[kontact] [Bug 405491] New: KMail (in Kontact) crashing upon start or shortly after

Christian Hilberg bugzilla_noreply at kde.org
Fri Mar 15 09:01:38 GMT 2019 

https://bugs.kde.org/show_bug.cgi?id=405491

            Bug ID: 405491
           Summary: KMail (in Kontact) crashing upon start or shortly
                    after
           Product: kontact
           Version: unspecified
          Platform: Debian stable
                OS: Linux
            Status: REPORTED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: kdepim-bugs at kde.org
          Reporter: hilberg at unix-ag.org
  Target Milestone: ---

Application: kontact (5.9.3)

Qt Version: 5.11.3
Frameworks Version: 5.54.0
Operating System: Linux 4.19.0-2-amd64 x86_64
Distribution: Debian GNU/Linux buster/sid

-- Information about the crash:
Open KMail (in Kontact), it crashes. If it does not, it will do so shortly
after. Open a few E-Mails and there you go.

I suspect that the crash might be due to graphics handling in the nouveau
driver. Experienced the same issue
on the nvidia legacy 390 binary driver.

Sometimes just before the crash I can see the message pane flashing in red
color.

This is not the latest KMail but the one packaged with Debian/Buster. I'd like
to file a bug with Debian referencing
this one on kde.org. They might need to backport an existing fix.

The crash can be reproduced every time.

-- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb441e1ff00 (LWP 21090))]

Thread 33 (Thread 0x7fb30f7fe700 (LWP 21192)):
#0  0x00007fb4556053f9 in futex_reltimed_wait_cancelable (private=0,
reltime=0x7fb30f7fd400, expected=0, futex_word=0x7fb30f7fd5e8) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fb4556053f9 in __pthread_cond_wait_common (abstime=0x7fb30f7fd4a0,
mutex=0x7fb30f7fd598, cond=0x7fb30f7fd5c0) at pthread_cond_wait.c:533
#2  0x00007fb4556053f9 in __pthread_cond_timedwait (cond=0x7fb30f7fd5c0,
mutex=0x7fb30f7fd598, abstime=0x7fb30f7fd4a0) at pthread_cond_wait.c:667
#3  0x00007fb44f19aa37 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb44f19d30a in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb44f19d3f2 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb44f1a1981 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb44f1a2e61 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#10 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 32 (Thread 0x7fb319325700 (LWP 21190)):
#0  0x00007fb4556053f9 in futex_reltimed_wait_cancelable (private=0,
reltime=0x7fb319324400, expected=0, futex_word=0x7fb3193245e8) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fb4556053f9 in __pthread_cond_wait_common (abstime=0x7fb3193244a0,
mutex=0x7fb319324598, cond=0x7fb3193245c0) at pthread_cond_wait.c:533
#2  0x00007fb4556053f9 in __pthread_cond_timedwait (cond=0x7fb3193245c0,
mutex=0x7fb319324598, abstime=0x7fb3193244a0) at pthread_cond_wait.c:667
#3  0x00007fb44f19aa37 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb44f19d30a in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb44f19d3f2 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb44f1a1981 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb44f1a2e61 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#10 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 31 (Thread 0x7fb30ffff700 (LWP 21177)):
#0  0x00007fb454a782a7 in g_main_context_release () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb454a790f6 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb454a7925c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb456cde04b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb456c8b14b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb456ada0d6 in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb456ae3c77 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#8  0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 30 (Thread 0x7fb31bfff700 (LWP 21156)):
#0  0x00007fb4556053f9 in futex_reltimed_wait_cancelable (private=0,
reltime=0x7fb31bffe400, expected=0, futex_word=0x7fb31bffe5e8) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fb4556053f9 in __pthread_cond_wait_common (abstime=0x7fb31bffe4a0,
mutex=0x7fb31bffe598, cond=0x7fb31bffe5c0) at pthread_cond_wait.c:533
#2  0x00007fb4556053f9 in __pthread_cond_timedwait (cond=0x7fb31bffe5c0,
mutex=0x7fb31bffe598, abstime=0x7fb31bffe4a0) at pthread_cond_wait.c:667
#3  0x00007fb44f19aa37 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb44f19d30a in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb44f19d3f2 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb44f1a1981 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb44f1a2c7f in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#10 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 29 (Thread 0x7fb3295ed700 (LWP 21140)):
#0  0x00007fb454ac2e69 in g_mutex_lock () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb454a78871 in g_main_context_query () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb454a790b7 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb454a7925c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb456cde04b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb456c8b14b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb456ada0d6 in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb456ae3c77 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#9  0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 28 (Thread 0x7fb32affd700 (LWP 21137)):
#0  0x00007fb4567aeb69 in __GI___poll (fds=0x7fb320025890, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fb454a79136 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb454a7925c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb456cde04b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb456c8b14b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb456ada0d6 in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb456ae3c77 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#8  0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 27 (Thread 0x7fb32b7fe700 (LWP 21136)):
#0  0x00007fb4567aa794 in __GI___libc_read (nbytes=16, buf=0x7fb32b7fd480,
fd=86) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007fb4567aa794 in __GI___libc_read (fd=86, buf=0x7fb32b7fd480,
nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007fb454abeaa0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb454a78c0f in g_main_context_check () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb454a790e0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fb454a7925c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fb456cde04b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb456c8b14b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb456ada0d6 in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fb456ae3c77 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#11 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 26 (Thread 0x7fb32bfff700 (LWP 21135)):
#0  0x00007fb4567aa794 in __GI___libc_read (nbytes=16, buf=0x7fb32bffe480,
fd=84) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007fb4567aa794 in __GI___libc_read (fd=84, buf=0x7fb32bffe480,
nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007fb454abeaa0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb454a78c0f in g_main_context_check () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb454a790e0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fb454a7925c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fb456cde04b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb456c8b14b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb456ada0d6 in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fb456ae3c77 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#11 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7fb3c67fc700 (LWP 21119)):
#0  0x00007fb4567c6aab in __lll_lock_wait_private () at
../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:63
#1  0x00007fb4567c8874 in ___fprintf_chk (fp=0x7fb45687d8b0
<_IO_stdfile_2_lock>, flag=1, format=0x7fb44a909848 "[%s] %s\n") at
fprintf_chk.c:30
#2  0x00007fb44a8f1a5a in event_logv_ () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fb44a8f1c34 in event_warn () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007fb44a8f3588 in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007fb44a8e9329 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007fb44f16f8b4 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb44f18ec8b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb44f1b0204 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#11 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7fb3c77fe700 (LWP 21117)):
#0  0x00007fb45560500c in futex_wait_cancelable (private=0, expected=0,
futex_word=0x7fb44b054fb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb45560500c in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7fb44b054f68, cond=0x7fb44b054f90) at pthread_cond_wait.c:502
#2  0x00007fb45560500c in __pthread_cond_wait (cond=0x7fb44b054f90,
mutex=0x7fb44b054f68) at pthread_cond_wait.c:655
#3  0x00007fb44af5de4a in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007fb44af5de69 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#6  0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7fb3c7fff700 (LWP 21116)):
#0  0x00007fb4567aeb69 in __GI___poll (fds=0x7fb3c0007030, nfds=3, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fb44007e101 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007fb44006f920 in pa_mainloop_poll () at
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007fb44006ff6e in pa_mainloop_iterate () at
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007fb440070020 in pa_mainloop_run () at
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007fb44007e049 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007fb43bfd14f8 in  () at
/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-12.2.so
#7  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#8  0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7fb3f8ff9700 (LWP 21115)):
#0  0x00007fb4567b9b4f in epoll_wait (epfd=46, events=0x7fb3d0002010,
maxevents=32, timeout=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fb44a8f3408 in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#2  0x00007fb44a8e9329 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fb44f16f7cd in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb44f18ec8b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb44f1b0204 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#8  0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7fb3f97fa700 (LWP 21114)):
#0  0x00007fb436d50bb3 in  () at /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2
#1  0x00007fb436d51670 in nouveau_pushbuf_kick () at
/usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2
#2  0x00007fb43ab6ac36 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#3  0x00007fb43ad76a51 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#4  0x00007fb44fa7e2aa in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb44fc91785 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb44fc0db14 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb44fc36ef1 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb45175f456 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb4517702bb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb451773d9b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fb451778af3 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fb451778baa in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007fb451763916 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007fb44f14b688 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007fb44f16c10a in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007fb44f16cbaf in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#17 0x00007fb44f16cd48 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#18 0x00007fb44f16f311 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#19 0x00007fb44f18ec8b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#20 0x00007fb44f1b0204 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#21 0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#22 0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#23 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7fb3f9ffb700 (LWP 21113)):
#0  0x00007fb4556053f9 in futex_reltimed_wait_cancelable (private=0,
reltime=0x7fb3f9ffa3c0, expected=0, futex_word=0x7fb3f9ffa5a8) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fb4556053f9 in __pthread_cond_wait_common (abstime=0x7fb3f9ffa460,
mutex=0x7fb3f9ffa558, cond=0x7fb3f9ffa580) at pthread_cond_wait.c:533
#2  0x00007fb4556053f9 in __pthread_cond_timedwait (cond=0x7fb3f9ffa580,
mutex=0x7fb3f9ffa558, abstime=0x7fb3f9ffa460) at pthread_cond_wait.c:667
#3  0x00007fb44f19aa37 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb44f19d30a in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb44f16f370 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb44f18ec8b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb44f1b0204 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#10 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7fb3fa7fc700 (LWP 21112)):
#0  0x00007fb45560500c in futex_wait_cancelable (private=0, expected=0,
futex_word=0x5645692de568) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb45560500c in __pthread_cond_wait_common (abstime=0x0,
mutex=0x5645692de4a8, cond=0x5645692de540) at pthread_cond_wait.c:502
#2  0x00007fb45560500c in __pthread_cond_wait (cond=0x5645692de540,
mutex=0x5645692de4a8) at pthread_cond_wait.c:655
#3  0x00007fb44f19a969 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb44fb007d8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb44f1b2d86 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#8  0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7fb3faffd700 (LWP 21111)):
#0  0x00007fb45560500c in futex_wait_cancelable (private=0, expected=0,
futex_word=0x7fb3faffc5f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb45560500c in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7fb3faffc5a8, cond=0x7fb3faffc5d0) at pthread_cond_wait.c:502
#2  0x00007fb45560500c in __pthread_cond_wait (cond=0x7fb3faffc5d0,
mutex=0x7fb3faffc5a8) at pthread_cond_wait.c:655
#3  0x00007fb44f19a969 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb44f19d318 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb44f19d3af in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb44f1a1998 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb44f1a2e61 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#10 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7fb3fb7fe700 (LWP 21110)):
#0  0x00007fb4567c6aab in __lll_lock_wait_private () at
../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:63
#1  0x00007fb4567c8874 in ___fprintf_chk (fp=0x7fb45687d8b0
<_IO_stdfile_2_lock>, flag=1, format=0x7fb44a909848 "[%s] %s\n") at
fprintf_chk.c:30
#2  0x00007fb44a8f1a5a in event_logv_ () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fb44a8f1c34 in event_warn () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007fb44a8f3588 in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007fb44a8e9329 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007fb44f16f8b4 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb44f18ec8b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb44e29fdba in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb44e2a0267 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb44f1b0338 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#13 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7fb3fbfff700 (LWP 21109)):
#0  0x00007fb45560500c in futex_wait_cancelable (private=0, expected=0,
futex_word=0x7fb3fbffe5f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb45560500c in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7fb3fbffe5a8, cond=0x7fb3fbffe5d0) at pthread_cond_wait.c:502
#2  0x00007fb45560500c in __pthread_cond_wait (cond=0x7fb3fbffe5d0,
mutex=0x7fb3fbffe5a8) at pthread_cond_wait.c:655
#3  0x00007fb44f19a969 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb44f19d318 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb44f19d3af in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb44f1a1998 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb44f1a2c7f in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#10 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7fb410ff9700 (LWP 21108)):
#0  0x00007fb45560500c in futex_wait_cancelable (private=0, expected=0,
futex_word=0x7fb410ff85f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb45560500c in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7fb410ff85a8, cond=0x7fb410ff85d0) at pthread_cond_wait.c:502
#2  0x00007fb45560500c in __pthread_cond_wait (cond=0x7fb410ff85d0,
mutex=0x7fb410ff85a8) at pthread_cond_wait.c:655
#3  0x00007fb44f19a969 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb44f19d318 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb44f19d3af in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb44f1a1998 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb44f1a2e61 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#10 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7fb4117fa700 (LWP 21107)):
#0  0x00007fb45560500c in futex_wait_cancelable (private=0, expected=0,
futex_word=0x7fb4117f95f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb45560500c in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7fb4117f95a8, cond=0x7fb4117f95d0) at pthread_cond_wait.c:502
#2  0x00007fb45560500c in __pthread_cond_wait (cond=0x7fb4117f95d0,
mutex=0x7fb4117f95a8) at pthread_cond_wait.c:655
#3  0x00007fb44f19a969 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb44f19d318 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb44f19d3af in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb44f1a1998 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb44f1a2c7f in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#10 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7fb411ffb700 (LWP 21106)):
#0  0x00007fb45560500c in futex_wait_cancelable (private=0, expected=0,
futex_word=0x7fb411ffa5f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb45560500c in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7fb411ffa5a8, cond=0x7fb411ffa5d0) at pthread_cond_wait.c:502
#2  0x00007fb45560500c in __pthread_cond_wait (cond=0x7fb411ffa5d0,
mutex=0x7fb411ffa5a8) at pthread_cond_wait.c:655
#3  0x00007fb44f19a969 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb44f19d318 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb44f19d3af in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb44f1a1998 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb44f1a2c7f in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#10 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7fb4127fc700 (LWP 21105)):
#0  0x00007fb45560500c in futex_wait_cancelable (private=0, expected=0,
futex_word=0x7fb4127fb5f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb45560500c in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7fb4127fb5a8, cond=0x7fb4127fb5d0) at pthread_cond_wait.c:502
#2  0x00007fb45560500c in __pthread_cond_wait (cond=0x7fb4127fb5d0,
mutex=0x7fb4127fb5a8) at pthread_cond_wait.c:655
#3  0x00007fb44f19a969 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb44f19d318 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb44f19d3af in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb44f1a1998 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb44f1a2c7f in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#10 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fb412ffd700 (LWP 21104)):
#0  0x00007fb4556053f9 in futex_reltimed_wait_cancelable (private=0,
reltime=0x7fb412ffc400, expected=0, futex_word=0x7fb412ffc5e8) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fb4556053f9 in __pthread_cond_wait_common (abstime=0x7fb412ffc4a0,
mutex=0x7fb412ffc598, cond=0x7fb412ffc5c0) at pthread_cond_wait.c:533
#2  0x00007fb4556053f9 in __pthread_cond_timedwait (cond=0x7fb412ffc5c0,
mutex=0x7fb412ffc598, abstime=0x7fb412ffc4a0) at pthread_cond_wait.c:667
#3  0x00007fb44f19aa37 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb44f19d30a in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb44f19d3f2 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb44f1a1981 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb44f1a2e61 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#10 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fb4137fe700 (LWP 21103)):
#0  0x00007fb4556053f9 in futex_reltimed_wait_cancelable (private=0,
reltime=0x7fb4137fd400, expected=0, futex_word=0x7fb4137fd5e8) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fb4556053f9 in __pthread_cond_wait_common (abstime=0x7fb4137fd4a0,
mutex=0x7fb4137fd598, cond=0x7fb4137fd5c0) at pthread_cond_wait.c:533
#2  0x00007fb4556053f9 in __pthread_cond_timedwait (cond=0x7fb4137fd5c0,
mutex=0x7fb4137fd598, abstime=0x7fb4137fd4a0) at pthread_cond_wait.c:667
#3  0x00007fb44f19aa37 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb44f19d30a in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb44f19d3f2 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb44f1a1981 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb44f1a2e61 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#10 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fb413fff700 (LWP 21102)):
#0  0x00007fb4556053f9 in futex_reltimed_wait_cancelable (private=0,
reltime=0x7fb413ffe400, expected=0, futex_word=0x7fb413ffe5e8) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fb4556053f9 in __pthread_cond_wait_common (abstime=0x7fb413ffe4a0,
mutex=0x7fb413ffe598, cond=0x7fb413ffe5c0) at pthread_cond_wait.c:533
#2  0x00007fb4556053f9 in __pthread_cond_timedwait (cond=0x7fb413ffe5c0,
mutex=0x7fb413ffe598, abstime=0x7fb413ffe4a0) at pthread_cond_wait.c:667
#3  0x00007fb44f19aa37 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb44f19d30a in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb44f19d3f2 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb44f1a1981 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb44f1a2e61 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#10 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fb42dffb700 (LWP 21099)):
#0  0x00007fb4556053f9 in futex_reltimed_wait_cancelable (private=0,
reltime=0x7fb42dffa400, expected=0, futex_word=0x7fb42dffa5e8) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fb4556053f9 in __pthread_cond_wait_common (abstime=0x7fb42dffa4a0,
mutex=0x7fb42dffa598, cond=0x7fb42dffa5c0) at pthread_cond_wait.c:533
#2  0x00007fb4556053f9 in __pthread_cond_timedwait (cond=0x7fb42dffa5c0,
mutex=0x7fb42dffa598, abstime=0x7fb42dffa4a0) at pthread_cond_wait.c:667
#3  0x00007fb44f19aa37 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb44f19d30a in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb44f19d3f2 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb44f1a1981 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb44f1a2e61 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#10 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fb42e7fc700 (LWP 21098)):
#0  0x00007fb4567c6aab in __lll_lock_wait_private () at
../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:63
#1  0x00007fb4567c8874 in ___fprintf_chk (fp=0x7fb45687d8b0
<_IO_stdfile_2_lock>, flag=1, format=0x7fb44a909848 "[%s] %s\n") at
fprintf_chk.c:30
#2  0x00007fb44a8f1a5a in event_logv_ () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fb44a8f1c34 in event_warn () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007fb44a8f3588 in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007fb44a8e9329 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007fb44f16f7cd in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb44f18ec8b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb44f1b0204 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#11 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fb42effd700 (LWP 21097)):
#0  0x00007fb45560500c in futex_wait_cancelable (private=0, expected=0,
futex_word=0x7fb42effc588) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb45560500c in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7fb42effc538, cond=0x7fb42effc560) at pthread_cond_wait.c:502
#2  0x00007fb45560500c in __pthread_cond_wait (cond=0x7fb42effc560,
mutex=0x7fb42effc538) at pthread_cond_wait.c:655
#3  0x00007fb44f19a969 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb44f19d318 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb44f19d3af in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb44f16f35f in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb44f18ec8b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb44f1b0204 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#11 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fb42f7fe700 (LWP 21096)):
#0  0x00007fb4567c6aab in __lll_lock_wait_private () at
../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:63
#1  0x00007fb4567c8874 in ___fprintf_chk (fp=0x7fb45687d8b0
<_IO_stdfile_2_lock>, flag=1, format=0x7fb44a909848 "[%s] %s\n") at
fprintf_chk.c:30
#2  0x00007fb44a8f1a5a in event_logv_ () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fb44a8f1c34 in event_warn () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007fb44a8f3588 in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007fb44a8e9329 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007fb44f16f7cd in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb44f18ec8b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb44f1b0204 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb44f1abc81 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#11 0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fb435fd6700 (LWP 21093)):
#0  0x00007fb4567aeb69 in __GI___poll (fds=0x7fb42803c340, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fb454a79136 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb454a7925c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb456cde04b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb456c8b14b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb456ada0d6 in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb4561cf545 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fb456ae3c77 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#9  0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fb436b78700 (LWP 21092)):
#0  0x00007fb45560500c in futex_wait_cancelable (private=0, expected=0,
futex_word=0x5645690fa578) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb45560500c in __pthread_cond_wait_common (abstime=0x0,
mutex=0x5645690fa528, cond=0x5645690fa550) at pthread_cond_wait.c:502
#2  0x00007fb45560500c in __pthread_cond_wait (cond=0x5645690fa550,
mutex=0x5645690fa528) at pthread_cond_wait.c:655
#3  0x00007fb43af38763 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#4  0x00007fb43af384b7 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#5  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#6  0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fb4410dc700 (LWP 21091)):
#0  0x00007fb4567aeb69 in __GI___poll (fds=0x7fb4410db5b8, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fb455834cf7 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fb45583691a in xcb_wait_for_event () at
/usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fb4419e9519 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fb456ae3c77 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb4555fefa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#6  0x00007fb4567b982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fb441e1ff00 (LWP 21090)):
[KCrash Handler]
#6  0x00007fb436d50c9e in  () at /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2
#7  0x00007fb436d51359 in  () at /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2
#8  0x00007fb43ab79adb in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#9  0x00007fb43ab79bc7 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#10 0x00007fb43ab7b1d6 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#11 0x00007fb43ad783cf in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#12 0x00007fb43ae053be in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#13 0x00007fb43ae060d7 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#14 0x00007fb4540c424b in
QSGBatchRenderer::Renderer::renderMergedBatch(QSGBatchRenderer::Batch const*)
() at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007fb4540c5225 in QSGBatchRenderer::Renderer::renderBatches() () at
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#16 0x00007fb4540ca9f4 in QSGBatchRenderer::Renderer::render() () at
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#17 0x00007fb4540bb64c in QSGRenderer::renderScene(QSGBindable const&) () at
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#18 0x00007fb4540bbadf in QSGRenderer::renderScene(unsigned int) () at
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#19 0x00007fb4540f5130 in
QSGDefaultRenderContext::renderNextFrame(QSGRenderer*, unsigned int) () at
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#20 0x00007fb454157400 in QQuickWindowPrivate::renderSceneGraph(QSize const&)
() at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#21 0x00007fb4542135e8 in QQuickRenderControl::render() () at
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#22 0x00007fb4544060ed in  () at
/usr/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#23 0x00007fb4544062b6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#24 0x00007fb456cb5e0b in QObject::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007fb457640bdb in QWidget::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007fb454409e5d in QQuickWidget::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#27 0x00007fb4560a3b50 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineWidgets.so.5
#28 0x00007fb457602491 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#29 0x00007fb457609ac0 in QApplication::notify(QObject*, QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#30 0x00007fb456c8c479 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007fb456cdd448 in QTimerInfoList::activateTimers() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007fb456cddca4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x00007fb454a78f2e in g_main_context_dispatch () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007fb454a791c8 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007fb454a7925c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007fb456cde033 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#37 0x00007fb441a7c8d1 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#38 0x00007fb456c8b14b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#39 0x00007fb456c932b2 in QCoreApplication::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#40 0x0000564568c06738 in  ()
#41 0x00007fb4566e409b in __libc_start_main (main=0x564568c05ba0, argc=1,
argv=0x7ffdf112e428, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7ffdf112e418) at ../csu/libc-start.c:308
#42 0x0000564568c06e4a in _start ()
[Inferior 1 (process 21090) detached]

Reported using DrKonqi

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