[kmail2] [Bug 397088] New: kmail crashes

Jesus Arocho bugzilla_noreply at kde.org
Thu Aug 2 12:56:34 BST 2018 

https://bugs.kde.org/show_bug.cgi?id=397088

            Bug ID: 397088
           Summary: kmail crashes
           Product: kmail2
           Version: 5.7.3
          Platform: Ubuntu Packages
                OS: Linux
            Status: UNCONFIRMED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: kdepim-bugs at kde.org
          Reporter: yuquiyu at verizon.net
  Target Milestone: ---

Application: kmail (5.7.3)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.15.0-29-generic x86_64
Distribution: Ubuntu 18.04.1 LTS

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

- Unusual behavior I noticed: Frequent crashes when manipulating emails, delete
or move.  Sometimes system freezes.  Only happens with kmail.  High CPU usage.

The crash can be reproduced every time.

-- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb9c7154b80 (LWP 14071))]

Thread 29 (Thread 0x7fb867fff700 (LWP 14141)):
#0  0x00007fb9b9b269f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x55cbc5f9c418) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb9b9b269f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x55cbc5f9c3c8, cond=0x55cbc5f9c3f0) at pthread_cond_wait.c:502
#2  0x00007fb9b9b269f3 in __pthread_cond_wait (cond=0x55cbc5f9c3f0,
mutex=0x55cbc5f9c3c8) at pthread_cond_wait.c:655
#3  0x00007fb9ae9c7c95 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb9ae9c8177 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb9ae9c8f11 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb9ae9c55eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb9b9b206db in start_thread (arg=0x7fb867fff700) at
pthread_create.c:463
#8  0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 28 (Thread 0x7fb8ed428700 (LWP 14140)):
#0  0x00007fb9b9b269f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7fb9ab290fb8) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb9b9b269f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7fb9ab290f68, cond=0x7fb9ab290f90) at pthread_cond_wait.c:502
#2  0x00007fb9b9b269f3 in __pthread_cond_wait (cond=0x7fb9ab290f90,
mutex=0x7fb9ab290f68) at pthread_cond_wait.c:655
#3  0x00007fb9aaf9a5f4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007fb9aaf9a639 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007fb9b9b206db in start_thread (arg=0x7fb8ed428700) at
pthread_create.c:463
#6  0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 27 (Thread 0x7fb8ef920700 (LWP 14131)):
#0  0x00007fb9c4223bf9 in __GI___poll (fds=0x7fb8e8001cb0, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fb9b7ecb439 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb9b7ecb54c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb9c4b7190b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb9c4b169ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb9c493522a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb9c493a16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb9b9b206db in start_thread (arg=0x7fb8ef920700) at
pthread_create.c:463
#8  0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 26 (Thread 0x7fb9257fa700 (LWP 14110)):
#0  0x00007fb9c423f6ac in __lll_lock_wait_private () at
../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007fb9c4241474 in ___fprintf_chk (fp=0x7fb9c44fc8b0
<_IO_stdfile_2_lock>, flag=1, format=0x7fb9a59cb6a8 "[%s] %s\n") at
fprintf_chk.c:30
#2  0x00007fb9a59b39ad in event_logv_ () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fb9a59b3b44 in event_warn () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007fb9a59b546c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007fb9a59ab114 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007fb9ae998ab9 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb9ae994da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb9ae9b177b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb9ae9c94d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb9ae9c55eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fb9b9b206db in start_thread (arg=0x7fb9257fa700) at
pthread_create.c:463
#12 0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7fb925ffb700 (LWP 14109)):
[KCrash Handler]
#6  0x00007fb98764c4e4 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#7  0x00007fb98764c6c8 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#8  0x00007fb98764c777 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#9  0x00007fb987380f2e in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#10 0x00007fb9872f04ca in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#11 0x00007fb9af2fa1e8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fb9af28cd7c in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007fb9af28d18a in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007fb9af2116fc in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007fb9b1bdf441 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007fb9b1bdf585 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#17 0x00007fb9ae9f1a83 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#18 0x00007fb9ae995a00 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#19 0x00007fb9ae997058 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#20 0x00007fb9ae997679 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#21 0x00007fb9ae9984a7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#22 0x00007fb9ae994da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#23 0x00007fb9ae9b177b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#24 0x00007fb9ae9c94d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#25 0x00007fb9ae9c55eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#26 0x00007fb9b9b206db in start_thread (arg=0x7fb925ffb700) at
pthread_create.c:463
#27 0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7fb9267fc700 (LWP 14108)):
#0  0x00007fb9c421f0b4 in __GI___libc_read (fd=56, buf=0x7fb9267fb85e,
nbytes=10) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007fb99ef4eff1 in pa_read () at
/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#2  0x00007fb9a793c9fe in pa_mainloop_prepare () at
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007fb9a793d470 in pa_mainloop_iterate () at
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007fb9a793d530 in pa_mainloop_run () at
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007fb9a794b399 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007fb99ef7e2a8 in  () at
/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#7  0x00007fb9b9b206db in start_thread (arg=0x7fb9267fc700) at
pthread_create.c:463
#8  0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7fb926ffd700 (LWP 14107)):
#0  0x00007fb9b9b26ed9 in futex_reltimed_wait_cancelable (private=<optimized
out>, reltime=0x7fb926ffc5d0, expected=0, futex_word=0x7fb926ffc758) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fb9b9b26ed9 in __pthread_cond_wait_common (abstime=0x7fb926ffc670,
mutex=0x7fb926ffc708, cond=0x7fb926ffc730) at pthread_cond_wait.c:533
#2  0x00007fb9b9b26ed9 in __pthread_cond_timedwait (cond=0x7fb926ffc730,
mutex=0x7fb926ffc708, abstime=0x7fb926ffc670) at pthread_cond_wait.c:667
#3  0x00007fb9ae9f6652 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb9ae9bd91e in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb9ae99852b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb9ae994da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb9ae9b177b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb9ae9c94d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb9ae9c55eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb9b9b206db in start_thread (arg=0x7fb926ffd700) at
pthread_create.c:463
#11 0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7fb9277fe700 (LWP 14106)):
#0  0x00007fb9b9b269f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x55cbc5fa96d8) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb9b9b269f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x55cbc5fa9618, cond=0x55cbc5fa96b0) at pthread_cond_wait.c:502
#2  0x00007fb9b9b269f3 in __pthread_cond_wait (cond=0x55cbc5fa96b0,
mutex=0x55cbc5fa9618) at pthread_cond_wait.c:655
#3  0x00007fb9af14f060 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb9ae9c8f11 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb9ae9c55eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb9b9b206db in start_thread (arg=0x7fb9277fe700) at
pthread_create.c:463
#7  0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7fb927fff700 (LWP 14105)):
#0  0x00007fb9b9b269f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x55cbc5f9c418) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb9b9b269f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x55cbc5f9c3c8, cond=0x55cbc5f9c3f0) at pthread_cond_wait.c:502
#2  0x00007fb9b9b269f3 in __pthread_cond_wait (cond=0x55cbc5f9c3f0,
mutex=0x55cbc5f9c3c8) at pthread_cond_wait.c:655
#3  0x00007fb9ae9c7c95 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb9ae9c8177 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb9ae9c8f11 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb9ae9c55eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb9b9b206db in start_thread (arg=0x7fb927fff700) at
pthread_create.c:463
#8  0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7fb93cff9700 (LWP 14104)):
#0  0x00007fb9b9b269f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7fb93cff8738) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb9b9b269f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7fb93cff86e8, cond=0x7fb93cff8710) at pthread_cond_wait.c:502
#2  0x00007fb9b9b269f3 in __pthread_cond_wait (cond=0x7fb93cff8710,
mutex=0x7fb93cff86e8) at pthread_cond_wait.c:655
#3  0x00007fb9ae9bd999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb9ae9bd9c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb9ae9984db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb9ae994da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb9ae9b177b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb9ae9c94d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb9ae9c55eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb9b9b206db in start_thread (arg=0x7fb93cff9700) at
pthread_create.c:463
#11 0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7fb93d7fa700 (LWP 14103)):
#0  0x00007fb9c421f187 in __GI___libc_write (fd=2, buf=0x7fb93d7f66e0,
nbytes=39) at ../sysdeps/unix/sysv/linux/write.c:27
#1  0x00007fb9c419a1bd in _IO_new_file_write (f=0x7fb9c44fb680
<_IO_2_1_stderr_>, data=0x7fb93d7f66e0, n=39) at fileops.c:1203
#2  0x00007fb9c419ab2f in new_do_write (to_do=<optimized out>,
data=0x7fb93d7f66e0 "[warn] epoll_wait: Bad file descriptor\n",
fp=0x7fb9c44fb680 <_IO_2_1_stderr_>) at fileops.c:457
#3  0x00007fb9c419ab2f in _IO_new_file_xsputn (f=0x7fb9c44fb680
<_IO_2_1_stderr_>, data=<optimized out>, n=39) at fileops.c:1277
#4  0x00007fb9c416d707 in buffered_vfprintf (s=s at entry=0x7fb9c44fb680
<_IO_2_1_stderr_>, format=format at entry=0x7fb9a59cb6a8 "[%s] %s\n",
args=args at entry=0x7fb93d7f8ca0) at vfprintf.c:2350
#5  0x00007fb9c416a726 in _IO_vfprintf_internal (s=s at entry=0x7fb9c44fb680
<_IO_2_1_stderr_>, format=0x7fb9a59cb6a8 "[%s] %s\n",
ap=ap at entry=0x7fb93d7f8ca0) at vfprintf.c:1301
#6  0x00007fb9c42414c6 in ___fprintf_chk (fp=0x7fb9c44fb680 <_IO_2_1_stderr_>,
flag=1, format=<optimized out>) at fprintf_chk.c:35
#7  0x00007fb9a59b39ad in event_logv_ () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#8  0x00007fb9a59b3b44 in event_warn () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#9  0x00007fb9a59b546c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#10 0x00007fb9a59ab114 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#11 0x00007fb9ae998bf3 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fb9ae994da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007fb9ae9b177b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007fb9ae24f978 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007fb9ae24ff2b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007fb9ae9c9588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#17 0x00007fb9ae9c55eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#18 0x00007fb9b9b206db in start_thread (arg=0x7fb93d7fa700) at
pthread_create.c:463
#19 0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7fb93dffb700 (LWP 14102)):
#0  0x00007fb9b9b269f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7fb93dffa358) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb9b9b269f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7fb93dffa308, cond=0x7fb93dffa330) at pthread_cond_wait.c:502
#2  0x00007fb9b9b269f3 in __pthread_cond_wait (cond=0x7fb93dffa330,
mutex=0x7fb93dffa308) at pthread_cond_wait.c:655
#3  0x00007fb9ae9bd999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb9ae9bd9c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb9ae9984db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb9ae994da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb9ae9b177b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb9ae24f8c8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb9ae24ff1b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb9ae9c9588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fb9ae9c55eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fb9b9b206db in start_thread (arg=0x7fb93dffb700) at
pthread_create.c:463
#13 0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7fb93e7fc700 (LWP 14101)):
#0  0x00007fb9b9b269f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7fb93e7fb358) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb9b9b269f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7fb93e7fb308, cond=0x7fb93e7fb330) at pthread_cond_wait.c:502
#2  0x00007fb9b9b269f3 in __pthread_cond_wait (cond=0x7fb93e7fb330,
mutex=0x7fb93e7fb308) at pthread_cond_wait.c:655
#3  0x00007fb9ae9bd999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb9ae9bd9c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb9ae9984db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb9ae994da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb9ae9b177b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb9ae24f818 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb9ae24ff0b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb9ae9c9588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fb9ae9c55eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fb9b9b206db in start_thread (arg=0x7fb93e7fc700) at
pthread_create.c:463
#13 0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7fb93effd700 (LWP 14100)):
#0  0x00007fb9b9b269f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7fb93effc358) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb9b9b269f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7fb93effc308, cond=0x7fb93effc330) at pthread_cond_wait.c:502
#2  0x00007fb9b9b269f3 in __pthread_cond_wait (cond=0x7fb93effc330,
mutex=0x7fb93effc308) at pthread_cond_wait.c:655
#3  0x00007fb9ae9bd999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb9ae9bd9c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb9ae9984db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb9ae994da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb9ae9b177b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb9ae24f768 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb9ae24fefb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb9ae9c9588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fb9ae9c55eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fb9b9b206db in start_thread (arg=0x7fb93effd700) at
pthread_create.c:463
#13 0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7fb93f7fe700 (LWP 14099)):
#0  0x00007fb9c4230bb7 in epoll_wait (epfd=44, events=0x7fb9300020d0,
maxevents=32, timeout=0) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fb9a59b52c5 in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#2  0x00007fb9a59ab114 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fb9ae998ab9 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb9ae994da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb9ae9b177b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb9ae24f6b8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb9ae24feeb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb9ae9c9588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb9ae9c55eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb9b9b206db in start_thread (arg=0x7fb93f7fe700) at
pthread_create.c:463
#11 0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7fb93ffff700 (LWP 14098)):
#0  0x00007fb9b9b269f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7fb93fffe358) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb9b9b269f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7fb93fffe308, cond=0x7fb93fffe330) at pthread_cond_wait.c:502
#2  0x00007fb9b9b269f3 in __pthread_cond_wait (cond=0x7fb93fffe330,
mutex=0x7fb93fffe308) at pthread_cond_wait.c:655
#3  0x00007fb9ae9bd999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb9ae9bd9c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb9ae9984db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb9ae994da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb9ae9b177b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb9ae24f608 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb9ae24fedb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb9ae9c9588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fb9ae9c55eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fb9b9b206db in start_thread (arg=0x7fb93ffff700) at
pthread_create.c:463
#13 0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7fb95c970700 (LWP 14097)):
#0  0x00007fb9b9b26ed9 in futex_reltimed_wait_cancelable (private=<optimized
out>, reltime=0x7fb95c96f7e0, expected=0, futex_word=0x7fb948004690) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fb9b9b26ed9 in __pthread_cond_wait_common (abstime=0x7fb95c96f880,
mutex=0x7fb948004640, cond=0x7fb948004668) at pthread_cond_wait.c:533
#2  0x00007fb9b9b26ed9 in __pthread_cond_timedwait (cond=0x7fb948004668,
mutex=0x7fb948004640, abstime=0x7fb95c96f880) at pthread_cond_wait.c:667
#3  0x00007fb9ae9f6652 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb9ae9cc799 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb9ae9cccfb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb9ae9c55eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb9b9b206db in start_thread (arg=0x7fb95c970700) at
pthread_create.c:463
#8  0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7fb95d171700 (LWP 14096)):
#0  0x00007fb9b9b26ed9 in futex_reltimed_wait_cancelable (private=<optimized
out>, reltime=0x7fb95d1707e0, expected=0, futex_word=0x7fb948004694) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fb9b9b26ed9 in __pthread_cond_wait_common (abstime=0x7fb95d170880,
mutex=0x7fb948004640, cond=0x7fb948004668) at pthread_cond_wait.c:533
#2  0x00007fb9b9b26ed9 in __pthread_cond_timedwait (cond=0x7fb948004668,
mutex=0x7fb948004640, abstime=0x7fb95d170880) at pthread_cond_wait.c:667
#3  0x00007fb9ae9f6652 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb9ae9cc799 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb9ae9cccfb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb9ae9c55eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb9b9b206db in start_thread (arg=0x7fb95d171700) at
pthread_create.c:463
#8  0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fb95d972700 (LWP 14095)):
#0  0x00007fb9b9b269f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7fb95d971738) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb9b9b269f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7fb95d9716e8, cond=0x7fb95d971710) at pthread_cond_wait.c:502
#2  0x00007fb9b9b269f3 in __pthread_cond_wait (cond=0x7fb95d971710,
mutex=0x7fb95d9716e8) at pthread_cond_wait.c:655
#3  0x00007fb9ae9bd999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fb9ae9bd9c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fb9ae9984db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fb9ae994da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb9ae9b177b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb9ae9c94d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb9ae9c55eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb9b9b206db in start_thread (arg=0x7fb95d972700) at
pthread_create.c:463
#11 0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fb95e381700 (LWP 14094)):
#0  0x00007fb9c423f6ac in __lll_lock_wait_private () at
../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007fb9c4241474 in ___fprintf_chk (fp=0x7fb9c44fc8b0
<_IO_stdfile_2_lock>, flag=1, format=0x7fb9a59cb6a8 "[%s] %s\n") at
fprintf_chk.c:30
#2  0x00007fb9a59b39ad in event_logv_ () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fb9a59b3b44 in event_warn () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007fb9a59b546c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007fb9a59ab114 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007fb9ae998ab9 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb9ae994da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb9ae9b177b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb9ae9c94d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb9ae9c55eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fb9b9b206db in start_thread (arg=0x7fb95e381700) at
pthread_create.c:463
#12 0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fb95ffff700 (LWP 14087)):
#0  0x00007fb9b9b269f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x55cbc5e462b0) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb9b9b269f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x55cbc5e46260, cond=0x55cbc5e46288) at pthread_cond_wait.c:502
#2  0x00007fb9b9b269f3 in __pthread_cond_wait (cond=0x55cbc5e46288,
mutex=0x55cbc5e46260) at pthread_cond_wait.c:655
#3  0x00007fb9c493b59b in QWaitCondition::wait(QMutex*, unsigned long) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb9c4933c0b in QSemaphore::acquire(int) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb96945d80c in  () at
/usr/lib/x86_64-linux-gnu/qt5/plugins/texttospeech/libqttexttospeech_flite.so
#6  0x00007fb9c493a16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb9b9b206db in start_thread (arg=0x7fb95ffff700) at
pthread_create.c:463
#8  0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fb96a27c700 (LWP 14085)):
#0  0x00007fb9b7ecb2d4 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb9b7ecb54c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb9c4b7190b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fb9c4b169ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb9c493522a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb9c493a16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb9b9b206db in start_thread (arg=0x7fb96a27c700) at
pthread_create.c:463
#7  0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fb9735ba700 (LWP 14077)):
#0  0x00007fb9b9b2803f in __GI___pthread_getspecific (key=7) at
pthread_getspecific.c:31
#1  0x00007fb9b7ef32f0 in g_thread_self () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb9b7eca2cc in g_main_context_acquire () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb9b7ecb2f5 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb9b7ecb54c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fb9c4b7190b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb9c4b169ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb9c493522a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb9c493a16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fb9b9b206db in start_thread (arg=0x7fb9735ba700) at
pthread_create.c:463
#10 0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fb973dbb700 (LWP 14076)):
#0  0x00007fb9b7ecad64 in g_main_context_check () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb9b7ecb3e0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb9b7ecb54c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb9c4b7190b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb9c4b169ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb9c493522a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb9c493a16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb9b9b206db in start_thread (arg=0x7fb973dbb700) at
pthread_create.c:463
#8  0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fb980d5e700 (LWP 14075)):
#0  0x00007fb9b7ec8327 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb9b7eca8d3 in g_main_context_prepare () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb9b7ecb36b in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb9b7ecb54c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb9c4b7190b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb9c4b169ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb9c493522a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb9c493a16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb9b9b206db in start_thread (arg=0x7fb980d5e700) at
pthread_create.c:463
#9  0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fb981f6f700 (LWP 14074)):
#0  0x00007fb9b7eca9d9 in g_main_context_prepare () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb9b7ecb36b in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb9b7ecb54c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb9c4b7190b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb9c4b169ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb9c493522a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb9c3169d45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fb9c493a16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb9b9b206db in start_thread (arg=0x7fb981f6f700) at
pthread_create.c:463
#9  0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fb982c07700 (LWP 14073)):
#0  0x00007fb9b9b269f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x55cbc5b36138) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb9b9b269f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x55cbc5b360e8, cond=0x55cbc5b36110) at pthread_cond_wait.c:502
#2  0x00007fb9b9b269f3 in __pthread_cond_wait (cond=0x55cbc5b36110,
mutex=0x55cbc5b360e8) at pthread_cond_wait.c:655
#3  0x00007fb98746d46b in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#4  0x00007fb98746d197 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#5  0x00007fb9b9b206db in start_thread (arg=0x7fb982c07700) at
pthread_create.c:463
#6  0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fb98f475700 (LWP 14072)):
#0  0x00007fb9c4223bf9 in __GI___poll (fds=0x7fb98f474928, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fb9b72f9747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fb9b72fb36a in xcb_wait_for_event () at
/usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fb9911702a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fb9c493a16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb9b9b206db in start_thread (arg=0x7fb98f475700) at
pthread_create.c:463
#6  0x00007fb9c423088f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fb9c7154b80 (LWP 14071)):
[KCrash Handler]
#6  0x00007fb9adfe045e in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fb9adfe14e3 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fb9adfe16c0 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fb9adfe2929 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fb9adfe7501 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fb9ae007048 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fb9b577d8b8 in QQuickWindowPrivate::updateDirtyNode(QQuickItem*) ()
at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x00007fb9b577e133 in QQuickWindowPrivate::updateDirtyNodes() () at
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x00007fb9b577f3b2 in QQuickWindowPrivate::syncSceneGraph() () at
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007fb9b5837f29 in QQuickRenderControl::sync() () at
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#16 0x00007fb9b5deaee1 in  () at
/usr/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#17 0x00007fb9b5deaf72 in  () at
/usr/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#18 0x00007fb9c4b480db in QObject::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007fb9c58d5743 in QWidget::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007fb9b5dee9eb in QQuickWidget::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#21 0x00007fb9b473db1b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineWidgets.so.5
#22 0x00007fb9c589682c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007fb9c589e0f4 in QApplication::notify(QObject*, QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007fb9c4b189a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007fb9c4b70d8e in QTimerInfoList::activateTimers() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007fb9c4b71551 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007fb9b7ecb287 in g_main_context_dispatch () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007fb9b7ecb4c0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007fb9b7ecb54c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007fb9c4b718ef in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007fb9c4b169ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007fb9c4b1fa84 in QCoreApplication::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x000055cbc410f7cd in  ()
#34 0x00007fb9c4130b97 in __libc_start_main (main=0x55cbc410e840, argc=3,
argv=0x7ffdbecdca98, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7ffdbecdca88) at ../csu/libc-start.c:310
#35 0x000055cbc410f8fa in _start ()

Reported using DrKonqi

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