[kmail2] [Bug 397728] New: Minimise caused crash

Con Kolivas bugzilla_noreply at kde.org
Wed Aug 22 05:44:50 BST 2018 

https://bugs.kde.org/show_bug.cgi?id=397728

            Bug ID: 397728
           Summary: Minimise caused crash
           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: kde at kolivas.org
  Target Milestone: ---

Application: kmail (5.7.3)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.17.2-ck1+ x86_64
Distribution: Ubuntu 18.04.1 LTS

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

After restarting akonadi server via akonadi console (which always crashes
itself on every shutdown or restart) I tried disabling my mail filters to get
mail to start working again since it always hangs every time I get an ical
event on my imap inbox, the mail started working. Then I minimised the window
(by hitting the close box) and this time kmail crashed.

The crash can be reproduced sometimes.

-- 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 0x7f86f2043b80 (LWP 7210))]

Thread 35 (Thread 0x7f858cde6700 (LWP 6788)):
#0  0x00007f86e4a2ced9 in futex_reltimed_wait_cancelable (private=<optimized
out>, reltime=0x7f858cde57e0, expected=0, futex_word=0x7f867c004844) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f86e4a2ced9 in __pthread_cond_wait_common (abstime=0x7f858cde5880,
mutex=0x7f867c0047f0, cond=0x7f867c004818) at pthread_cond_wait.c:533
#2  0x00007f86e4a2ced9 in __pthread_cond_timedwait (cond=0x7f867c004818,
mutex=0x7f867c0047f0, abstime=0x7f858cde5880) at pthread_cond_wait.c:667
#3  0x00007f86d98fc652 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f86d98d2799 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f86d98d2cfb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f86e4a266db in start_thread (arg=0x7f858cde6700) at
pthread_create.c:463
#8  0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 34 (Thread 0x7f858f156700 (LWP 6787)):
#0  0x00007f86e4a2ced9 in futex_reltimed_wait_cancelable (private=<optimized
out>, reltime=0x7f858f1557e0, expected=0, futex_word=0x7f867c004840) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f86e4a2ced9 in __pthread_cond_wait_common (abstime=0x7f858f155880,
mutex=0x7f867c0047f0, cond=0x7f867c004818) at pthread_cond_wait.c:533
#2  0x00007f86e4a2ced9 in __pthread_cond_timedwait (cond=0x7f867c004818,
mutex=0x7f867c0047f0, abstime=0x7f858f155880) at pthread_cond_wait.c:667
#3  0x00007f86d98fc652 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f86d98d2799 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f86d98d2cfb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f86e4a266db in start_thread (arg=0x7f858f156700) at
pthread_create.c:463
#8  0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 33 (Thread 0x7f8624066700 (LWP 6380)):
#0  0x00007f86e4a2ced9 in futex_reltimed_wait_cancelable (private=<optimized
out>, reltime=0x7f86240657e0, expected=0, futex_word=0x7f867c004844) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f86e4a2ced9 in __pthread_cond_wait_common (abstime=0x7f8624065880,
mutex=0x7f867c0047f0, cond=0x7f867c004818) at pthread_cond_wait.c:533
#2  0x00007f86e4a2ced9 in __pthread_cond_timedwait (cond=0x7f867c004818,
mutex=0x7f867c0047f0, abstime=0x7f8624065880) at pthread_cond_wait.c:667
#3  0x00007f86d98fc652 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f86d98d2799 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f86d98d2cfb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f86e4a266db in start_thread (arg=0x7f8624066700) at
pthread_create.c:463
#8  0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 32 (Thread 0x7f861cb08700 (LWP 6194)):
#0  0x00007f86ef129bf9 in __GI___poll (fds=0x7f866c0d8200, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f86e2dd1439 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f86e2dd154c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f86efa7790b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f86efa1c9ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f86ef83b22a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f86ef84016d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f86e4a266db in start_thread (arg=0x7f861cb08700) at
pthread_create.c:463
#8  0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 31 (Thread 0x7f858e3fc700 (LWP 5940)):
#0  0x00007f86e4a2ced9 in futex_reltimed_wait_cancelable (private=<optimized
out>, reltime=0x7f858e3fb7e0, expected=0, futex_word=0x7f867c004840) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f86e4a2ced9 in __pthread_cond_wait_common (abstime=0x7f858e3fb880,
mutex=0x7f867c0047f0, cond=0x7f867c004818) at pthread_cond_wait.c:533
#2  0x00007f86e4a2ced9 in __pthread_cond_timedwait (cond=0x7f867c004818,
mutex=0x7f867c0047f0, abstime=0x7f858e3fb880) at pthread_cond_wait.c:667
#3  0x00007f86d98fc652 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f86d98d2799 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f86d98d2cfb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f86e4a266db in start_thread (arg=0x7f858e3fc700) at
pthread_create.c:463
#8  0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 30 (Thread 0x7f8617fff700 (LWP 5939)):
#0  0x00007f86e4a2ced9 in futex_reltimed_wait_cancelable (private=<optimized
out>, reltime=0x7f8617ffe7e0, expected=0, futex_word=0x7f867c004844) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f86e4a2ced9 in __pthread_cond_wait_common (abstime=0x7f8617ffe880,
mutex=0x7f867c0047f0, cond=0x7f867c004818) at pthread_cond_wait.c:533
#2  0x00007f86e4a2ced9 in __pthread_cond_timedwait (cond=0x7f867c004818,
mutex=0x7f867c0047f0, abstime=0x7f8617ffe880) at pthread_cond_wait.c:667
#3  0x00007f86d98fc652 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f86d98d2799 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f86d98d2cfb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f86e4a266db in start_thread (arg=0x7f8617fff700) at
pthread_create.c:463
#8  0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 29 (Thread 0x7f858d5e7700 (LWP 5904)):
#0  0x00007f86e4a2ced9 in futex_reltimed_wait_cancelable (private=<optimized
out>, reltime=0x7f858d5e67e0, expected=0, futex_word=0x7f867c004844) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f86e4a2ced9 in __pthread_cond_wait_common (abstime=0x7f858d5e6880,
mutex=0x7f867c0047f0, cond=0x7f867c004818) at pthread_cond_wait.c:533
#2  0x00007f86e4a2ced9 in __pthread_cond_timedwait (cond=0x7f867c004818,
mutex=0x7f867c0047f0, abstime=0x7f858d5e6880) at pthread_cond_wait.c:667
#3  0x00007f86d98fc652 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f86d98d2799 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f86d98d2cfb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f86e4a266db in start_thread (arg=0x7f858d5e7700) at
pthread_create.c:463
#8  0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 28 (Thread 0x7f857512a700 (LWP 25288)):
#0  0x00007f86ef1250b4 in __GI___libc_read (fd=112, buf=0x7f8575129810,
nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f86e2e15960 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f86e2dd0f27 in g_main_context_check () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f86e2dd13e0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f86e2dd154c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f86efa7790b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f86efa1c9ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f86ef83b22a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f86ef84016d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f86e4a266db in start_thread (arg=0x7f857512a700) at
pthread_create.c:463
#10 0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 27 (Thread 0x7f858ffff700 (LWP 26486)):
#0  0x00007f86e4a2c9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x557ce4ae9968) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f86e4a2c9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x557ce4ae9918, cond=0x557ce4ae9940) at pthread_cond_wait.c:502
#2  0x00007f86e4a2c9f3 in __pthread_cond_wait (cond=0x557ce4ae9940,
mutex=0x557ce4ae9918) at pthread_cond_wait.c:655
#3  0x00007f86d98cdc95 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f86d98ce177 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f86d98cef11 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f86e4a266db in start_thread (arg=0x7f858ffff700) at
pthread_create.c:463
#8  0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 26 (Thread 0x7f861773c700 (LWP 17365)):
#0  0x00007f86e4a2c9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x557ce4ae996c) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f86e4a2c9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x557ce4ae9918, cond=0x557ce4ae9940) at pthread_cond_wait.c:502
#2  0x00007f86e4a2c9f3 in __pthread_cond_wait (cond=0x557ce4ae9940,
mutex=0x557ce4ae9918) at pthread_cond_wait.c:655
#3  0x00007f86d98cdc95 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f86d98ce177 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f86d98cef11 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f86e4a266db in start_thread (arg=0x7f861773c700) at
pthread_create.c:463
#8  0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7f867bfff700 (LWP 17307)):
#0  0x00007f86e4a2c9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f86d6196fb8) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f86e4a2c9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f86d6196f68, cond=0x7f86d6196f90) at pthread_cond_wait.c:502
#2  0x00007f86e4a2c9f3 in __pthread_cond_wait (cond=0x7f86d6196f90,
mutex=0x7f86d6196f68) at pthread_cond_wait.c:655
#3  0x00007f86d5ea05f4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007f86d5ea0639 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007f86e4a266db in start_thread (arg=0x7f867bfff700) at
pthread_create.c:463
#6  0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7f8690e69700 (LWP 17290)):
#0  0x00007f86ef1250b4 in __GI___libc_read (fd=84, buf=0x7f8690e68810,
nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f86e2e15960 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f86e2dd0f27 in g_main_context_check () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f86e2dd13e0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f86e2dd154c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f86efa7790b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f86efa1c9ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f86ef83b22a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f86ef84016d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f86e4a266db in start_thread (arg=0x7f8690e69700) at
pthread_create.c:463
#10 0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7f8658ff9700 (LWP 7249)):
#0  0x00007f86ef129bf9 in __GI___poll (fds=0x7f8634007130, nfds=3, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f86d2851451 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007f86d2842e10 in pa_mainloop_poll () at
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007f86d28434a0 in pa_mainloop_iterate () at
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f86d2843530 in pa_mainloop_run () at
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f86d2851399 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f86c9e842a8 in  () at
/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#7  0x00007f86e4a266db in start_thread (arg=0x7f8658ff9700) at
pthread_create.c:463
#8  0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7f86597fa700 (LWP 7248)):
#0  0x00007f86ef125187 in __GI___libc_write (fd=2, buf=0x7f86597f6ac0,
nbytes=39) at ../sysdeps/unix/sysv/linux/write.c:27
#1  0x00007f86ef0a01bd in _IO_new_file_write (f=0x7f86ef401680
<_IO_2_1_stderr_>, data=0x7f86597f6ac0, n=39) at fileops.c:1203
#2  0x00007f86ef0a0b2f in new_do_write (to_do=<optimized out>,
data=0x7f86597f6ac0 "[warn] epoll_wait: Bad file descriptor\n",
fp=0x7f86ef401680 <_IO_2_1_stderr_>) at fileops.c:457
#3  0x00007f86ef0a0b2f in _IO_new_file_xsputn (f=0x7f86ef401680
<_IO_2_1_stderr_>, data=<optimized out>, n=39) at fileops.c:1277
#4  0x00007f86ef073707 in buffered_vfprintf (s=s at entry=0x7f86ef401680
<_IO_2_1_stderr_>, format=format at entry=0x7f86d08d16a8 "[%s] %s\n",
args=args at entry=0x7f86597f9080) at vfprintf.c:2350
#5  0x00007f86ef070726 in _IO_vfprintf_internal (s=s at entry=0x7f86ef401680
<_IO_2_1_stderr_>, format=0x7f86d08d16a8 "[%s] %s\n",
ap=ap at entry=0x7f86597f9080) at vfprintf.c:1301
#6  0x00007f86ef1474c6 in ___fprintf_chk (fp=0x7f86ef401680 <_IO_2_1_stderr_>,
flag=1, format=<optimized out>) at fprintf_chk.c:35
#7  0x00007f86d08b99ad in event_logv_ () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#8  0x00007f86d08b9b44 in event_warn () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#9  0x00007f86d08bb46c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#10 0x00007f86d08b1114 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#11 0x00007f86d989eb0d in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f86d989ada8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f86d98b777b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007f86d98cf4d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007f86e4a266db in start_thread (arg=0x7f86597fa700) at
pthread_create.c:463
#17 0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7f8659ffb700 (LWP 7247)):
#0  0x00007f86e4a2c9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f8659ffa738) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f86e4a2c9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f8659ffa6e8, cond=0x7f8659ffa710) at pthread_cond_wait.c:502
#2  0x00007f86e4a2c9f3 in __pthread_cond_wait (cond=0x7f8659ffa710,
mutex=0x7f8659ffa6e8) at pthread_cond_wait.c:655
#3  0x00007f86d98c3999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f86d98c39c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f86d989e4db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f86d989ada8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f86d98b777b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f86d98cf4d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f86e4a266db in start_thread (arg=0x7f8659ffb700) at
pthread_create.c:463
#11 0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7f865a7fc700 (LWP 7246)):
#0  0x00007f86e4a2ced9 in futex_reltimed_wait_cancelable (private=<optimized
out>, reltime=0x7f865a7fb5d0, expected=0, futex_word=0x7f865a7fb758) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f86e4a2ced9 in __pthread_cond_wait_common (abstime=0x7f865a7fb670,
mutex=0x7f865a7fb708, cond=0x7f865a7fb730) at pthread_cond_wait.c:533
#2  0x00007f86e4a2ced9 in __pthread_cond_timedwait (cond=0x7f865a7fb730,
mutex=0x7f865a7fb708, abstime=0x7f865a7fb670) at pthread_cond_wait.c:667
#3  0x00007f86d98fc652 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f86d98c391e in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f86d989e52b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f86d989ada8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f86d98b777b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f86d98cf4d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f86e4a266db in start_thread (arg=0x7f865a7fc700) at
pthread_create.c:463
#11 0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7f865affd700 (LWP 7245)):
#0  0x00007f86e4a2c9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x557ce4a7fbc8) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f86e4a2c9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x557ce4a7fb08, cond=0x557ce4a7fba0) at pthread_cond_wait.c:502
#2  0x00007f86e4a2c9f3 in __pthread_cond_wait (cond=0x557ce4a7fba0,
mutex=0x557ce4a7fb08) at pthread_cond_wait.c:655
#3  0x00007f86da055060 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f86d98cef11 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f86e4a266db in start_thread (arg=0x7f865affd700) at
pthread_create.c:463
#7  0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7f865b7fe700 (LWP 7244)):
#0  0x00007f86e4a2c9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x557ce4ae9968) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f86e4a2c9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x557ce4ae9918, cond=0x557ce4ae9940) at pthread_cond_wait.c:502
#2  0x00007f86e4a2c9f3 in __pthread_cond_wait (cond=0x557ce4ae9940,
mutex=0x557ce4ae9918) at pthread_cond_wait.c:655
#3  0x00007f86d98cdc95 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f86d98ce177 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f86d98cef11 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f86e4a266db in start_thread (arg=0x7f865b7fe700) at
pthread_create.c:463
#8  0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f865bfff700 (LWP 7243)):
#0  0x00007f86e4a2c9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f865bffe738) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f86e4a2c9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f865bffe6e8, cond=0x7f865bffe710) at pthread_cond_wait.c:502
#2  0x00007f86e4a2c9f3 in __pthread_cond_wait (cond=0x7f865bffe710,
mutex=0x7f865bffe6e8) at pthread_cond_wait.c:655
#3  0x00007f86d98c3999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f86d98c39c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f86d989e4db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f86d989ada8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f86d98b777b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f86d98cf4d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f86e4a266db in start_thread (arg=0x7f865bfff700) at
pthread_create.c:463
#11 0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f8678ff9700 (LWP 7242)):
#0  0x00007f86ef1456ac in __lll_lock_wait_private () at
../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f86ef147474 in ___fprintf_chk (fp=0x7f86ef4028b0
<_IO_stdfile_2_lock>, flag=1, format=0x7f86d08d16a8 "[%s] %s\n") at
fprintf_chk.c:30
#2  0x00007f86d08b99ad in event_logv_ () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f86d08b9b44 in event_warn () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f86d08bb46c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f86d08b1114 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f86d989ebf3 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f86d989ada8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f86d98b777b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f86d9155978 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f86d9155f2b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f86d98cf588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f86e4a266db in start_thread (arg=0x7f8678ff9700) at
pthread_create.c:463
#14 0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f86797fa700 (LWP 7241)):
#0  0x00007f86e4a2c9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f86797f9358) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f86e4a2c9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f86797f9308, cond=0x7f86797f9330) at pthread_cond_wait.c:502
#2  0x00007f86e4a2c9f3 in __pthread_cond_wait (cond=0x7f86797f9330,
mutex=0x7f86797f9308) at pthread_cond_wait.c:655
#3  0x00007f86d98c3999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f86d98c39c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f86d989e4db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f86d989ada8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f86d98b777b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f86d91558c8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f86d9155f1b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f86d98cf588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f86e4a266db in start_thread (arg=0x7f86797fa700) at
pthread_create.c:463
#13 0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f8679ffb700 (LWP 7240)):
#0  0x00007f86e4a2c9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f8679ffa358) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f86e4a2c9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f8679ffa308, cond=0x7f8679ffa330) at pthread_cond_wait.c:502
#2  0x00007f86e4a2c9f3 in __pthread_cond_wait (cond=0x7f8679ffa330,
mutex=0x7f8679ffa308) at pthread_cond_wait.c:655
#3  0x00007f86d98c3999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f86d98c39c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f86d989e4db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f86d989ada8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f86d98b777b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f86d9155818 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f86d9155f0b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f86d98cf588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f86e4a266db in start_thread (arg=0x7f8679ffb700) at
pthread_create.c:463
#13 0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f867a7fc700 (LWP 7239)):
#0  0x00007f86e4a2c9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f867a7fb358) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f86e4a2c9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f867a7fb308, cond=0x7f867a7fb330) at pthread_cond_wait.c:502
#2  0x00007f86e4a2c9f3 in __pthread_cond_wait (cond=0x7f867a7fb330,
mutex=0x7f867a7fb308) at pthread_cond_wait.c:655
#3  0x00007f86d98c3999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f86d98c39c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f86d989e4db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f86d989ada8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f86d98b777b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f86d9155768 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f86d9155efb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f86d98cf588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f86e4a266db in start_thread (arg=0x7f867a7fc700) at
pthread_create.c:463
#13 0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f867affd700 (LWP 7238)):
#0  0x00007f86ef136bb7 in epoll_wait (epfd=55, events=0x7f86640020d0,
maxevents=32, timeout=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007f86d08bb2c5 in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#2  0x00007f86d08b1114 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f86d989eb0d in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f86d989ada8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f86d98b777b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f86d91556b8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f86d9155eeb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f86d98cf588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f86e4a266db in start_thread (arg=0x7f867affd700) at
pthread_create.c:463
#11 0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f867b7fe700 (LWP 7237)):
#0  0x00007f86e4a2c9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f867b7fd358) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f86e4a2c9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f867b7fd308, cond=0x7f867b7fd330) at pthread_cond_wait.c:502
#2  0x00007f86e4a2c9f3 in __pthread_cond_wait (cond=0x7f867b7fd330,
mutex=0x7f867b7fd308) at pthread_cond_wait.c:655
#3  0x00007f86d98c3999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f86d98c39c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f86d989e4db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f86d989ada8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f86d98b777b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f86d9155608 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f86d9155edb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f86d98cf588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f86e4a266db in start_thread (arg=0x7f867b7fe700) at
pthread_create.c:463
#13 0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f869166a700 (LWP 7234)):
#0  0x00007f86e4a2c9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f8691669738) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f86e4a2c9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f86916696e8, cond=0x7f8691669710) at pthread_cond_wait.c:502
#2  0x00007f86e4a2c9f3 in __pthread_cond_wait (cond=0x7f8691669710,
mutex=0x7f86916696e8) at pthread_cond_wait.c:655
#3  0x00007f86d98c3999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f86d98c39c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f86d989e4db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f86d989ada8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f86d98b777b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f86d98cf4d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f86e4a266db in start_thread (arg=0x7f869166a700) at
pthread_create.c:463
#11 0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f8692079700 (LWP 7233)):
#0  0x00007f86ef1456ac in __lll_lock_wait_private () at
../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f86ef147474 in ___fprintf_chk (fp=0x7f86ef4028b0
<_IO_stdfile_2_lock>, flag=1, format=0x7f86d08d16a8 "[%s] %s\n") at
fprintf_chk.c:30
#2  0x00007f86d08b99ad in event_logv_ () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f86d08b9b44 in event_warn () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f86d08bb46c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f86d08b1114 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f86d989eab9 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f86d989ada8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f86d98b777b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f86d98cf4d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f86e4a266db in start_thread (arg=0x7f8692079700) at
pthread_create.c:463
#12 0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f869287a700 (LWP 7232)):
#0  0x00007f86ef0f96c2 in __GI___waitpid (pid=7229, stat_loc=0x0, options=0) at
../sysdeps/unix/sysv/linux/waitpid.c:30
#1  0x00007f86d98b34be in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007f86d98cb5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007f86e4a266db in start_thread (arg=0x7f869287a700) at
pthread_create.c:463
#4  0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f8693fff700 (LWP 7226)):
#0  0x00007f86e4a2c9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x557ce4acce90) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f86e4a2c9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x557ce4acce40, cond=0x557ce4acce68) at pthread_cond_wait.c:502
#2  0x00007f86e4a2c9f3 in __pthread_cond_wait (cond=0x557ce4acce68,
mutex=0x557ce4acce40) at pthread_cond_wait.c:655
#3  0x00007f86ef84159b in QWaitCondition::wait(QMutex*, unsigned long) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f86ef839c0b in QSemaphore::acquire(int) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f869d26b80c in  () at
/usr/lib/x86_64-linux-gnu/qt5/plugins/texttospeech/libqttexttospeech_flite.so
#6  0x00007f86ef84016d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f86e4a266db in start_thread (arg=0x7f8693fff700) at
pthread_create.c:463
#8  0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f86a73a1700 (LWP 7216)):
#0  0x00007f86e2dd0e95 in g_main_context_check () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f86e2dd13e0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f86e2dd154c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f86efa7790b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f86efa1c9ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f86ef83b22a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f86ef84016d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f86e4a266db in start_thread (arg=0x7f86a73a1700) at
pthread_create.c:463
#8  0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f86a7ba2700 (LWP 7215)):
#0  0x00007f86ef1250b4 in __GI___libc_read (fd=24, buf=0x7f86a7ba1810,
nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f86e2e15960 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f86e2dd0f27 in g_main_context_check () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f86e2dd13e0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f86e2dd154c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f86efa7790b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f86efa1c9ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f86ef83b22a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f86ef84016d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f86e4a266db in start_thread (arg=0x7f86a7ba2700) at
pthread_create.c:463
#10 0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f86b0a4e700 (LWP 7214)):
#0  0x00007f86ef129bf9 in __GI___poll (fds=0x7f86a8004a10, nfds=1,
timeout=10319) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f86e2dd1439 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f86e2dd154c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f86efa7790b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f86efa1c9ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f86ef83b22a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f86ef84016d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f86e4a266db in start_thread (arg=0x7f86b0a4e700) at
pthread_create.c:463
#8  0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f86b8880700 (LWP 7213)):
#0  0x00007f86ef129bf9 in __GI___poll (fds=0x7f86ac0296b0, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f86e2dd1439 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f86e2dd154c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f86efa7790b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f86efa1c9ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f86ef83b22a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f86ee06fd45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f86ef84016d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f86e4a266db in start_thread (arg=0x7f86b8880700) at
pthread_create.c:463
#9  0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f86ba529700 (LWP 7212)):
#0  0x00007f86ef129bf9 in __GI___poll (fds=0x7f86ba528928, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f86e21ff747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f86e220136a in xcb_wait_for_event () at
/usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f86bc2242a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f86ef84016d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f86e4a266db in start_thread (arg=0x7f86ba529700) at
pthread_create.c:463
#6  0x00007f86ef13688f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f86f2043b80 (LWP 7210)):
[KCrash Handler]
#6  0x00007f86e0ab7bb0 in vtable for QSGGeometry () at
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f86ed549787 in
KStatusNotifierItem::setStatus(KStatusNotifierItem::ItemStatus) () at
/usr/lib/x86_64-linux-gnu/libKF5Notifications.so.5
#8  0x00007f86f18dfe29 in KMKernel::canQueryClose() () at
/usr/lib/x86_64-linux-gnu/libkmailprivate.so.5
#9  0x00007f86eeb29945 in KMainWindow::closeEvent(QCloseEvent*) () at
/usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#10 0x00007f86f07db038 in QWidget::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007f86f08eec4b in QMainWindow::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007f86eeb29b87 in KMainWindow::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#13 0x00007f86eeb6e9e5 in KXmlGuiWindow::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#14 0x00007f86f079c82c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007f86f07a40f4 in QApplication::notify(QObject*, QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007f86efa1e9a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f86f07d6861 in
QWidgetPrivate::close_helper(QWidgetPrivate::CloseMode) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007f86f07f57a6 in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007f86f07f8867 in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007f86f079c82c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007f86f07a40f4 in QApplication::notify(QObject*, QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007f86efa1e9a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f86effdda1a in
QGuiApplicationPrivate::processCloseEvent(QWindowSystemInterfacePrivate::CloseEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#24 0x00007f86effe2025 in
QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#25 0x00007f86effb92eb in
QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>)
() at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#26 0x00007f86bc2871c0 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#27 0x00007f86e2dd1287 in g_main_context_dispatch () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007f86e2dd14c0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007f86e2dd154c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007f86efa778ef in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007f86efa1c9ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007f86efa25a84 in QCoreApplication::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x0000557ce24f97cd in  ()
#34 0x00007f86ef036b97 in __libc_start_main (main=0x557ce24f8840, argc=3,
argv=0x7fffb120a4b8, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7fffb120a4a8) at ../csu/libc-start.c:310
#35 0x0000557ce24f98fa in _start ()

Reported using DrKonqi

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