Bug 411347

Summary:	Kmail or Kontact crashes randomly
Product:	[Applications] kontact	Reporter:	Pavel <pavel>
Component:	general	Assignee:	kdepim bugs <kdepim-bugs>
Status:	RESOLVED DOWNSTREAM
Severity:	crash	Keywords:	drkonqi
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	Debian stable
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Pavel 2019-08-27 10:54:12 UTC

Application: kontact (5.9.3)

Qt Version: 5.11.3
Frameworks Version: 5.54.0
Operating System: Linux 4.19.0-5-rt-amd64 x86_64
Distribution: Debian GNU/Linux 10 (buster)

-- Information about the crash:
- What I was doing when the application crashed:
Sometimes it crashes when I click on the mail to open a preview
Sometimes it crashes when I scroll through the preview by mouse wheel (when I scroll fast, the probability increases)
Sometimes it crashes when I do just nothing.

Yes, I'm using a Nouveau driver. But all other applications are OK, the problem is only with Kmail.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Kontact (kontact), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fe0e5c7bf00 (LWP 4667))]

Thread 30 (Thread 0x7fe0b77fe700 (LWP 4796)):
#0  0x00007fe0f904e3f9 in futex_reltimed_wait_cancelable (private=0, reltime=0x7fe0b77fd400, expected=0, futex_word=0x7fe0b77fd5e8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fe0f904e3f9 in __pthread_cond_wait_common (abstime=0x7fe0b77fd4a0, mutex=0x7fe0b77fd598, cond=0x7fe0b77fd5c0) at pthread_cond_wait.c:533
#2  0x00007fe0f904e3f9 in __pthread_cond_timedwait (cond=0x7fe0b77fd5c0, mutex=0x7fe0b77fd598, abstime=0x7fe0b77fd4a0) at pthread_cond_wait.c:667
#3  0x00007fe0f2ddda37 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fe0f2de030a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fe0f2de03f2 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fe0f2de4981 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fe0f2de5e61 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fe0f2deec81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 29 (Thread 0x7fdfba935700 (LWP 4741)):
#0  0x00007fe0fa1fb7d0 in __GI___poll (fds=0x55c967903390, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe0f84c1136 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe0f84c125c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe0fa72987b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe0fa6d727b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe0fa526ec6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe0fa530aa7 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 28 (Thread 0x7fdfca23f700 (LWP 4718)):
#0  0x00007fe0fa1fb7d7 in __GI___poll (fds=0x7fdfc00049b0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe0f84c1136 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe0f84c125c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe0fa72987b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe0fa6d727b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe0fa526ec6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe0fa530aa7 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 27 (Thread 0x7fdfcb7fe700 (LWP 4713)):
#0  0x00007fe0fa21376f in __libc_enable_asynccancel () at ../sysdeps/unix/sysv/linux/x86_64/cancellation.S:56
#1  0x00007fe0fa1fb806 in __GI___poll (fds=0x7fdfbc025e70, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#2  0x00007fe0f84c1136 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe0f84c125c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fe0fa72987b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe0fa6d727b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe0fa526ec6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe0fa530aa7 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 26 (Thread 0x7fdfcbfff700 (LWP 4712)):
#0  0x00007fe0f850ae90 in g_mutex_unlock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fe0f84c065c in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe0f84c106b in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe0f84c125c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fe0fa72987b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe0fa6d727b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe0fa526ec6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe0fa530aa7 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7fe08cdd0700 (LWP 4711)):
#0  0x00007fe0fa1f7494 in __GI___libc_read (nbytes=16, buf=0x7fe08cdcf480, fd=87) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007fe0fa1f7494 in __GI___libc_read (fd=87, buf=0x7fe08cdcf480, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007fe0f8506aa0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe0f84c0c0f in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fe0f84c10e0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe0f84c125c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fe0fa72987b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe0fa6d727b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe0fa526ec6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fe0fa530aa7 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#11 0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7fe08e7fc700 (LWP 4696)):
#0  0x00007fe0fa1f7537 in __GI___libc_write (nbytes=46, buf=0x7fe08e7f88f0, fd=2) at ../sysdeps/unix/sysv/linux/write.c:26
#1  0x00007fe0fa1f7537 in __GI___libc_write (fd=2, buf=0x7fe08e7f88f0, nbytes=46) at ../sysdeps/unix/sysv/linux/write.c:24
#2  0x00007fe0fa1883bd in _IO_new_file_write (f=0x7fe0fa2c9680 <_IO_2_1_stderr_>, data=0x7fe08e7f88f0, n=46) at fileops.c:1183
#3  0x00007fe0fa18775f in new_do_write (fp=fp@entry=0x7fe0fa2c9680 <_IO_2_1_stderr_>, data=data@entry=0x7fe08e7f88f0 "[warn] epoll_wait: Chybn\303\275 popisova\304\215 souboru\n", to_do=to_do@entry=46) at libioP.h:839
#4  0x00007fe0fa188aee in _IO_new_file_xsputn (n=46, data=<optimized out>, f=0x7fe0fa2c9680 <_IO_2_1_stderr_>) at fileops.c:1262
#5  0x00007fe0fa188aee in _IO_new_file_xsputn (f=0x7fe0fa2c9680 <_IO_2_1_stderr_>, data=<optimized out>, n=46) at fileops.c:1204
#6  0x00007fe0fa15f932 in buffered_vfprintf (s=s@entry=0x7fe0fa2c9680 <_IO_2_1_stderr_>, format=format@entry=0x7fe0ee54c848 "[%s] %s\n", args=args@entry=0x7fe08e7faeb0) at ../libio/libioP.h:839
#7  0x00007fe0fa15ceb2 in _IO_vfprintf_internal (s=s@entry=0x7fe0fa2c9680 <_IO_2_1_stderr_>, format=0x7fe0ee54c848 "[%s] %s\n", ap=ap@entry=0x7fe08e7faeb0) at vfprintf.c:1296
#8  0x00007fe0fa215536 in ___fprintf_chk (fp=0x7fe0fa2c9680 <_IO_2_1_stderr_>, flag=1, format=<optimized out>) at fprintf_chk.c:35
#9  0x00007fe0ee534a5a in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#10 0x00007fe0ee534c34 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#11 0x00007fe0ee536588 in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#12 0x00007fe0ee52c329 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#13 0x00007fe0f2db2779 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007fe0f2dd1c8b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007fe0f2df3204 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007fe0f2deec81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#17 0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#18 0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7fe08ffff700 (LWP 4694)):
#0  0x00007fe0f904e00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x7fe0eec96fb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fe0f904e00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fe0eec96f68, cond=0x7fe0eec96f90) at pthread_cond_wait.c:502
#2  0x00007fe0f904e00c in __pthread_cond_wait (cond=0x7fe0eec96f90, mutex=0x7fe0eec96f68) at pthread_cond_wait.c:655
#3  0x00007fe0eeba0e6a in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007fe0eeba0e89 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7fe094ff9700 (LWP 4693)):
#0  0x00007fe0e40e44b3 in pa_mainloop_prepare () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#1  0x00007fe0e40e4f60 in pa_mainloop_iterate () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007fe0e40e5020 in pa_mainloop_run () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007fe0e40f3049 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007fe0e40904f8 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-12.2.so
#5  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7fe0957fa700 (LWP 4692)):
#0  0x00007fe0fa21371b in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:63
#1  0x00007fe0fa2154e4 in ___fprintf_chk (fp=0x7fe0fa2ca8b0 <_IO_stdfile_2_lock>, flag=1, format=0x7fe0ee54c848 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007fe0ee534a5a in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fe0ee534c34 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007fe0ee536588 in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007fe0ee52c329 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007fe0f2db2779 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fe0f2dd1c8b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fe0f2df3204 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fe0f2deec81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#11 0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7fe095ffb700 (LWP 4691)):
#0  0x00007fe0f904e3f9 in futex_reltimed_wait_cancelable (private=0, reltime=0x7fe095ffa3c0, expected=0, futex_word=0x7fe095ffa5a8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fe0f904e3f9 in __pthread_cond_wait_common (abstime=0x7fe095ffa460, mutex=0x7fe095ffa558, cond=0x7fe095ffa580) at pthread_cond_wait.c:533
#2  0x00007fe0f904e3f9 in __pthread_cond_timedwait (cond=0x7fe095ffa580, mutex=0x7fe095ffa558, abstime=0x7fe095ffa460) at pthread_cond_wait.c:667
#3  0x00007fe0f2ddda37 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fe0f2de030a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fe0f2db2370 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fe0f2dd1c8b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fe0f2df3204 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fe0f2deec81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7fe0967fc700 (LWP 4690)):
#0  0x00007fe0f904e3f9 in futex_reltimed_wait_cancelable (private=0, reltime=0x7fe0967fb3c0, expected=0, futex_word=0x7fe0967fb5a8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fe0f904e3f9 in __pthread_cond_wait_common (abstime=0x7fe0967fb460, mutex=0x7fe0967fb558, cond=0x7fe0967fb580) at pthread_cond_wait.c:533
#2  0x00007fe0f904e3f9 in __pthread_cond_timedwait (cond=0x7fe0967fb580, mutex=0x7fe0967fb558, abstime=0x7fe0967fb460) at pthread_cond_wait.c:667
#3  0x00007fe0f2ddda37 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fe0f2de030a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fe0f2db2370 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fe0f2dd1c8b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fe0f2df3204 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fe0f2deec81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7fe096ffd700 (LWP 4689)):
#0  0x00007fe0f904e00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55c966cd6c28) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fe0f904e00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55c966cd6b68, cond=0x55c966cd6c00) at pthread_cond_wait.c:502
#2  0x00007fe0f904e00c in __pthread_cond_wait (cond=0x55c966cd6c00, mutex=0x55c966cd6b68) at pthread_cond_wait.c:655
#3  0x00007fe0f2ddd969 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fe0f37437d8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fe0f2df5d86 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fe0f2deec81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7fe0977fe700 (LWP 4688)):
#0  0x00007fe0f904e00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x7fe0977fd5f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fe0f904e00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fe0977fd5a8, cond=0x7fe0977fd5d0) at pthread_cond_wait.c:502
#2  0x00007fe0f904e00c in __pthread_cond_wait (cond=0x7fe0977fd5d0, mutex=0x7fe0977fd5a8) at pthread_cond_wait.c:655
#3  0x00007fe0f2ddd969 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fe0f2de0318 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fe0f2de03af in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fe0f2de4998 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fe0f2de5e61 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fe0f2deec81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7fe08f7fe700 (LWP 4687)):
#0  0x00007fe0fa21371b in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:63
#1  0x00007fe0fa2154e4 in ___fprintf_chk (fp=0x7fe0fa2ca8b0 <_IO_stdfile_2_lock>, flag=1, format=0x7fe0ee54c848 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007fe0ee534a5a in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fe0ee534c34 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007fe0ee536588 in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007fe0ee52c329 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007fe0f2db2779 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fe0f2dd1c8b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fe0f1ee2dba in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fe0f1ee3267 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fe0f2df3338 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fe0f2deec81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#13 0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7fe097fff700 (LWP 4686)):
#0  0x00007fe0f904e00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x7fe097ffe5f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fe0f904e00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fe097ffe5a8, cond=0x7fe097ffe5d0) at pthread_cond_wait.c:502
#2  0x00007fe0f904e00c in __pthread_cond_wait (cond=0x7fe097ffe5d0, mutex=0x7fe097ffe5a8) at pthread_cond_wait.c:655
#3  0x00007fe0f2ddd969 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fe0f2de0318 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fe0f2de03af in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fe0f2de4998 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fe0f2de5c7f in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fe0f2deec81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7fe0b4ff9700 (LWP 4685)):
#0  0x00007fe0f904e00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x7fe0b4ff85f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fe0f904e00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fe0b4ff85a8, cond=0x7fe0b4ff85d0) at pthread_cond_wait.c:502
#2  0x00007fe0f904e00c in __pthread_cond_wait (cond=0x7fe0b4ff85d0, mutex=0x7fe0b4ff85a8) at pthread_cond_wait.c:655
#3  0x00007fe0f2ddd969 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fe0f2de0318 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fe0f2de03af in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fe0f2de4998 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fe0f2de5e61 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fe0f2deec81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7fe0b57fa700 (LWP 4684)):
#0  0x00007fe0f904e00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x7fe0b57f95f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fe0f904e00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fe0b57f95a8, cond=0x7fe0b57f95d0) at pthread_cond_wait.c:502
#2  0x00007fe0f904e00c in __pthread_cond_wait (cond=0x7fe0b57f95d0, mutex=0x7fe0b57f95a8) at pthread_cond_wait.c:655
#3  0x00007fe0f2ddd969 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fe0f2de0318 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fe0f2de03af in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fe0f2de4998 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fe0f2de5c7f in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fe0f2deec81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7fe0b5ffb700 (LWP 4683)):
#0  0x00007fe0f904e00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x7fe0b5ffa5f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fe0f904e00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fe0b5ffa5a8, cond=0x7fe0b5ffa5d0) at pthread_cond_wait.c:502
#2  0x00007fe0f904e00c in __pthread_cond_wait (cond=0x7fe0b5ffa5d0, mutex=0x7fe0b5ffa5a8) at pthread_cond_wait.c:655
#3  0x00007fe0f2ddd969 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fe0f2de0318 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fe0f2de03af in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fe0f2de4998 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fe0f2de5c7f in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fe0f2deec81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fe0b67fc700 (LWP 4682)):
#0  0x00007fe0f904e00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x7fe0b67fb5f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fe0f904e00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fe0b67fb5a8, cond=0x7fe0b67fb5d0) at pthread_cond_wait.c:502
#2  0x00007fe0f904e00c in __pthread_cond_wait (cond=0x7fe0b67fb5d0, mutex=0x7fe0b67fb5a8) at pthread_cond_wait.c:655
#3  0x00007fe0f2ddd969 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fe0f2de0318 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fe0f2de03af in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fe0f2de4998 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fe0f2de5c7f in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fe0f2deec81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fe0b6ffd700 (LWP 4681)):
#0  0x00007fe0f904e3f9 in futex_reltimed_wait_cancelable (private=0, reltime=0x7fe0b6ffc400, expected=0, futex_word=0x7fe0b6ffc5e8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fe0f904e3f9 in __pthread_cond_wait_common (abstime=0x7fe0b6ffc4a0, mutex=0x7fe0b6ffc598, cond=0x7fe0b6ffc5c0) at pthread_cond_wait.c:533
#2  0x00007fe0f904e3f9 in __pthread_cond_timedwait (cond=0x7fe0b6ffc5c0, mutex=0x7fe0b6ffc598, abstime=0x7fe0b6ffc4a0) at pthread_cond_wait.c:667
#3  0x00007fe0f2ddda37 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fe0f2de030a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fe0f2de03f2 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fe0f2de4981 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fe0f2de5e61 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fe0f2deec81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fe0d0ff9700 (LWP 4678)):
#0  0x00007fe0f904e3f9 in futex_reltimed_wait_cancelable (private=0, reltime=0x7fe0d0ff8400, expected=0, futex_word=0x7fe0d0ff85e8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fe0f904e3f9 in __pthread_cond_wait_common (abstime=0x7fe0d0ff84a0, mutex=0x7fe0d0ff8598, cond=0x7fe0d0ff85c0) at pthread_cond_wait.c:533
#2  0x00007fe0f904e3f9 in __pthread_cond_timedwait (cond=0x7fe0d0ff85c0, mutex=0x7fe0d0ff8598, abstime=0x7fe0d0ff84a0) at pthread_cond_wait.c:667
#3  0x00007fe0f2ddda37 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fe0f2de030a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fe0f2de03f2 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fe0f2de4981 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fe0f2de5e61 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fe0f2deec81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fe0d1ffb700 (LWP 4676)):
#0  0x00007fe0f904e3f9 in futex_reltimed_wait_cancelable (private=0, reltime=0x7fe0d1ffa400, expected=0, futex_word=0x7fe0d1ffa5e8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fe0f904e3f9 in __pthread_cond_wait_common (abstime=0x7fe0d1ffa4a0, mutex=0x7fe0d1ffa598, cond=0x7fe0d1ffa5c0) at pthread_cond_wait.c:533
#2  0x00007fe0f904e3f9 in __pthread_cond_timedwait (cond=0x7fe0d1ffa5c0, mutex=0x7fe0d1ffa598, abstime=0x7fe0d1ffa4a0) at pthread_cond_wait.c:667
#3  0x00007fe0f2ddda37 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fe0f2de030a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fe0f2de03f2 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fe0f2de4981 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fe0f2de5e61 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fe0f2deec81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fe0d27fc700 (LWP 4675)):
#0  0x00007fe0fa21371b in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:63
#1  0x00007fe0fa2154e4 in ___fprintf_chk (fp=0x7fe0fa2ca8b0 <_IO_stdfile_2_lock>, flag=1, format=0x7fe0ee54c848 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007fe0ee534a5a in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fe0ee534c34 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007fe0ee536588 in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007fe0ee52c329 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007fe0f2db2779 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fe0f2dd1c8b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fe0f2df3204 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fe0f2deec81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#11 0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fe0d2ffd700 (LWP 4674)):
#0  0x00007fe0f904e00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x7fe0d2ffc588) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fe0f904e00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fe0d2ffc538, cond=0x7fe0d2ffc560) at pthread_cond_wait.c:502
#2  0x00007fe0f904e00c in __pthread_cond_wait (cond=0x7fe0d2ffc560, mutex=0x7fe0d2ffc538) at pthread_cond_wait.c:655
#3  0x00007fe0f2ddd969 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fe0f2de0318 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fe0f2de03af in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fe0f2db235f in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fe0f2dd1c8b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fe0f2df3204 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fe0f2deec81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#11 0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fe0d37fe700 (LWP 4673)):
#0  0x00007fe0fa21371b in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:63
#1  0x00007fe0fa2154e4 in ___fprintf_chk (fp=0x7fe0fa2ca8b0 <_IO_stdfile_2_lock>, flag=1, format=0x7fe0ee54c848 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007fe0ee534a5a in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fe0ee534c34 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007fe0ee536588 in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007fe0ee52c329 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007fe0f2db27cd in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fe0f2dd1c8b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fe0f2df3204 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fe0f2deec81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#11 0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fe0da108700 (LWP 4670)):
#0  0x00007fe0fa1f7494 in __GI___libc_read (nbytes=16, buf=0x7fe0da107450, fd=10) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007fe0fa1f7494 in __GI___libc_read (fd=10, buf=0x7fe0da107450, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007fe0f8506aa0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe0f84c0c0f in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fe0f84c10e0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe0f84c125c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fe0fa72987b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe0fa6d727b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe0fa526ec6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fe0f9c12545 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#10 0x00007fe0fa530aa7 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#12 0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fe0da9e5700 (LWP 4669)):
#0  0x00007fe0f904e00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55c966b272c8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fe0f904e00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55c966b27278, cond=0x55c966b272a0) at pthread_cond_wait.c:502
#2  0x00007fe0f904e00c in __pthread_cond_wait (cond=0x55c966b272a0, mutex=0x55c966b27278) at pthread_cond_wait.c:655
#3  0x00007fe0ded98353 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#4  0x00007fe0ded980a7 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#5  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fe0e4f2b700 (LWP 4668)):
#0  0x00007fe0fa1fb819 in __GI___poll (fds=0x7fe0e4f2a5b8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe0f927dcf7 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fe0f927f91a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fe0e580ad79 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fe0fa530aa7 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe0f9047fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007fe0fa2064cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fe0e5c7bf00 (LWP 4667)):
[KCrash Handler]
#6  0x00007fe0fa1447bb in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#7  0x00007fe0fa12f535 in __GI_abort () at abort.c:79
#8  0x00007fe0fa12f40f in __assert_fail_base (fmt=0x7fe0df8be208 "%s%s%s:%u: %s%sP\305\231edpoklad \342\200\236%s\342\200\234 nespln\304\233n.\n%n", assertion=0x7fe0daba8068 "kref", file=0x7fe0daba8052 "../nouveau/pushbuf.c", line=723, function=<optimized out>) at assert.c:92
#9  0x00007fe0fa13d102 in __GI___assert_fail (assertion=0x7fe0daba8068 "kref", file=0x7fe0daba8052 "../nouveau/pushbuf.c", line=723, function=0x7fe0daba81a0 "nouveau_pushbuf_data") at assert.c:101
#10 0x00007fe0daba559f in  () at /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2
#11 0x00007fe0daba5503 in nouveau_pushbuf_data () at /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2
#12 0x00007fe0daba562f in  () at /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2
#13 0x00007fe0daba5a7f in  () at /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2
#14 0x00007fe0daba6670 in nouveau_pushbuf_kick () at /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2
#15 0x00007fe0de96fdb6 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#16 0x00007fe0deaf28af in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#17 0x00007fe0de6cdb37 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#18 0x00007fe0df858899 in  () at /usr/lib/x86_64-linux-gnu/libGLX_mesa.so.0
#19 0x00007fe0e5987146 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/xcbglintegrations/libqxcb-glx-integration.so
#20 0x00007fe0faabec4b in QOpenGLContext::swapBuffers(QSurface*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#21 0x00007fe0fad52c74 in QPlatformBackingStore::composeAndFlush(QWindow*, QRegion const&, QPoint const&, QPlatformTextureList*, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#22 0x00007fe0e582ce94 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#23 0x00007fe0fb05fad3 in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007fe0fb06156b in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#25 0x00007fe0fb062b12 in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007fe0fb062e69 in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007fe0fb079a35 in QWidgetPrivate::syncBackingStore() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#28 0x00007fe0fb0916b8 in QWidget::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#29 0x00007fe0fb197de4 in QMainWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#30 0x00007fe0fb7b817b in KMainWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#31 0x00007fe0fb802115 in KXmlGuiWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#32 0x00007fe0fb0534b1 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#33 0x00007fe0fb05a950 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#34 0x00007fe0fa6d85a9 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007fe0fa6db59b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#36 0x00007fe0fa72a233 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#37 0x00007fe0f84c0f2e in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#38 0x00007fe0f84c11c8 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007fe0f84c125c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#40 0x00007fe0fa729863 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#41 0x00007fe0e58a13e1 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#42 0x00007fe0fa6d727b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#43 0x00007fe0fa6df262 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#44 0x000055c9661b1738 in  ()
#45 0x00007fe0fa13109b in __libc_start_main (main=0x55c9661b0ba0, argc=1, argv=0x7fff325afcc8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff325afcb8) at ../csu/libc-start.c:308
#46 0x000055c9661b1e4a in _start ()
[Inferior 1 (process 4667) detached]

The reporter indicates this bug may be a duplicate of or related to bug 399250.

Possible duplicates by query: bug 399250, bug 387553, bug 386263.

Reported using DrKonqi

Comment 1 Christoph Feck 2019-09-17 01:43:56 UTC

Crash is a known issue in the nouveau OpenGL driver. Many distributions disable OpenGL usage in QtWebEngine when detecting nouveau driver. I suggest to report this issue to the bug tracker of your distribution.