Application: akregator (5.11.2)

Qt Version: 5.12.3
Frameworks Version: 5.59.0
Operating System: Linux 4.18.0-21-generic x86_64
Distribution: KDE neon User Edition 5.16

-- Information about the crash:
- What I was doing when the application crashed:
Trying to start Akregator over ssh -X session 
running akregator results in crash

trying kstart and dbus-launch same result

deleteting all akregtor related setups / caches / db etc , same result

The crash can be reproduced every time.

-- Backtrace:
Application: Akregator (akregator), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f588e8e7bc0 (LWP 31988))]

Thread 22 (Thread 0x7f575ed7b700 (LWP 32041)):
#0  0x00007f587df38ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f575ed7a710, expected=0, futex_word=0x7f575ed7a8f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f587df38ed9 in __pthread_cond_wait_common (abstime=0x7f575ed7a7b0, mutex=0x7f575ed7a8a8, cond=0x7f575ed7a8d0) at pthread_cond_wait.c:533
#2  0x00007f587df38ed9 in __pthread_cond_timedwait (cond=0x7f575ed7a8d0, mutex=0x7f575ed7a8a8, abstime=0x7f575ed7a7b0) at pthread_cond_wait.c:667
#3  0x00007f5884233b17 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f588423446a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f5884234552 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f58841f4fb1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f58841f74c7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f58841f7ab4 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f5884236561 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f587df326db in start_thread (arg=0x7f575ed7b700) at pthread_create.c:463
#11 0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7f575f7fe700 (LWP 32027)):
#0  0x00007f587df389f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f575f7fd908) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f587df389f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f575f7fd8b8, cond=0x7f575f7fd8e0) at pthread_cond_wait.c:502
#2  0x00007f587df389f3 in __pthread_cond_wait (cond=0x7f575f7fd8e0, mutex=0x7f575f7fd8b8) at pthread_cond_wait.c:655
#3  0x00007f5884233a49 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f5884234478 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f588423450f in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f58841f4fc8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f58841f77f6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f58841f7b34 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f5884236561 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f587df326db in start_thread (arg=0x7f575f7fe700) at pthread_create.c:463
#11 0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7f575ffff700 (LWP 32026)):
#0  0x00007f588a6936ac in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f588a695474 in ___fprintf_chk (fp=0x7f588a9508b0 <_IO_stdfile_2_lock>, flag=1, format=0x7f58765756a8 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f587655d9ad in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f587655db44 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f587655f46c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f5876555114 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f5884239c79 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f58841d42db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f5884206311 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f5884236561 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f587df326db in start_thread (arg=0x7f575ffff700) at pthread_create.c:463
#11 0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7f57f8a31700 (LWP 32025)):
#0  0x00007f587df38ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f57f8a30710, expected=0, futex_word=0x7f57f8a308f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f587df38ed9 in __pthread_cond_wait_common (abstime=0x7f57f8a307b0, mutex=0x7f57f8a308a8, cond=0x7f57f8a308d0) at pthread_cond_wait.c:533
#2  0x00007f587df38ed9 in __pthread_cond_timedwait (cond=0x7f57f8a308d0, mutex=0x7f57f8a308a8, abstime=0x7f57f8a307b0) at pthread_cond_wait.c:667
#3  0x00007f5884233b17 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f588423446a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f5884234552 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f58841f4fb1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f58841f74c7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f58841f7ab4 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f5884236561 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f587df326db in start_thread (arg=0x7f57f8a31700) at pthread_create.c:463
#11 0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7f57fa14a700 (LWP 32024)):
#0  0x00007f587df389f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f58715f6fb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f587df389f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f58715f6f68, cond=0x7f58715f6f90) at pthread_cond_wait.c:502
#2  0x00007f587df389f3 in __pthread_cond_wait (cond=0x7f58715f6f90, mutex=0x7f58715f6f68) at pthread_cond_wait.c:655
#3  0x00007f5871300844 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007f5871300889 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007f587df326db in start_thread (arg=0x7f57fa14a700) at pthread_create.c:463
#6  0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f57fb7fe700 (LWP 32023)):
#0  0x00007f588a677bf9 in __GI___poll (fds=0x7f57e0004a10, nfds=1, timeout=9962) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f587bc104c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f587bc105dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f588afbadcb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f588af5c03a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f588ad834ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f588ad84c72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f587df326db in start_thread (arg=0x7f57fb7fe700) at pthread_create.c:463
#8  0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f57fbfff700 (LWP 32022)):
#0  0x00007f588a6730b4 in __GI___libc_read (fd=46, buf=0x7f57fbffe81e, nbytes=10) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f583fba0021 in pa_read () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#2  0x00007f5844066a2e in pa_mainloop_prepare () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007f58440674a0 in pa_mainloop_iterate () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f5844067560 in pa_mainloop_run () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f58440753c9 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f583fbcf318 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#7  0x00007f587df326db in start_thread (arg=0x7f57fbfff700) at pthread_create.c:463
#8  0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f5824ff9700 (LWP 32021)):
#0  0x00007f588a6936ac in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f588a695474 in ___fprintf_chk (fp=0x7f588a9508b0 <_IO_stdfile_2_lock>, flag=1, format=0x7f58765756a8 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f587655d9ad in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f587655db44 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f587655f46c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f5876555114 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f5884239c79 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f58841d42db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f5884206311 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f5884236561 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f587df326db in start_thread (arg=0x7f5824ff9700) at pthread_create.c:463
#11 0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f58257fa700 (LWP 32020)):
#0  0x00007f587df389f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f58257f84bc) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f587df389f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x560789a33fa8, cond=0x7f58257f8490) at pthread_cond_wait.c:502
#2  0x00007f587df389f3 in __pthread_cond_wait (cond=0x7f58257f8490, mutex=0x560789a33fa8) at pthread_cond_wait.c:655
#3  0x00007f587b7a2952 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#4  0x00007f587b7a406f in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#5  0x00007f587b7a41ef in xcb_wait_for_reply64 () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#6  0x00007f587e5b66e8 in _XReply () at /usr/lib/x86_64-linux-gnu/libX11.so.6
#7  0x00007f5858553307 in  () at /usr/lib/x86_64-linux-gnu/libGLX_indirect.so.0
#8  0x00007f5858553468 in  () at /usr/lib/x86_64-linux-gnu/libGLX_indirect.so.0
#9  0x00007f585853998f in  () at /usr/lib/x86_64-linux-gnu/libGLX_indirect.so.0
#10 0x00007f586f54b212 in  () at /usr/lib/x86_64-linux-gnu/libGLX.so.0
#11 0x00007f586f54bbd5 in  () at /usr/lib/x86_64-linux-gnu/libGLX.so.0
#12 0x00007f586f54d1d6 in  () at /usr/lib/x86_64-linux-gnu/libGLX.so.0
#13 0x00007f58848ab4f6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007f5886990afa in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007f588698ac4b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007f5886988d86 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#17 0x00007f5886989fb2 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#18 0x00007f588698b9e5 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#19 0x00007f5884194283 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#20 0x00007f58841b79a2 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#21 0x00007f58841b842f in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#22 0x00007f58841b85b8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#23 0x00007f58841b2a21 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#24 0x00007f58841d42db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#25 0x00007f5884206311 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#26 0x00007f5884236561 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#27 0x00007f587df326db in start_thread (arg=0x7f58257fa700) at pthread_create.c:463
#28 0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f5825ffb700 (LWP 32019)):
#0  0x00007f587df38ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f5825ffa700, expected=0, futex_word=0x7f5825ffa8e8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f587df38ed9 in __pthread_cond_wait_common (abstime=0x7f5825ffa7a0, mutex=0x7f5825ffa898, cond=0x7f5825ffa8c0) at pthread_cond_wait.c:533
#2  0x00007f587df38ed9 in __pthread_cond_timedwait (cond=0x7f5825ffa8c0, mutex=0x7f5825ffa898, abstime=0x7f5825ffa7a0) at pthread_cond_wait.c:667
#3  0x00007f5884233b17 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f588423446a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f58841b2a80 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f58841d42db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f5884206311 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f5884236561 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f587df326db in start_thread (arg=0x7f5825ffb700) at pthread_create.c:463
#10 0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f58267fc700 (LWP 32018)):
#0  0x00007f587df389f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560789c527d8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f587df389f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x560789c52718, cond=0x560789c527b0) at pthread_cond_wait.c:502
#2  0x00007f587df389f3 in __pthread_cond_wait (cond=0x560789c527b0, mutex=0x560789c52718) at pthread_cond_wait.c:655
#3  0x00007f5884233a49 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f5884aec178 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f58842077df in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f5884236561 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f587df326db in start_thread (arg=0x7f58267fc700) at pthread_create.c:463
#8  0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f5826ffd700 (LWP 32017)):
#0  0x00007f587df389f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f5826ffc908) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f587df389f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f5826ffc8b8, cond=0x7f5826ffc8e0) at pthread_cond_wait.c:502
#2  0x00007f587df389f3 in __pthread_cond_wait (cond=0x7f5826ffc8e0, mutex=0x7f5826ffc8b8) at pthread_cond_wait.c:655
#3  0x00007f5884233a49 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f5884234478 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f588423450f in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f58841f4fc8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f58841f77f6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f58841f7af4 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f5884236561 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f587df326db in start_thread (arg=0x7f5826ffd700) at pthread_create.c:463
#11 0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f58277fe700 (LWP 32016)):
#0  0x00007f588a6936ac in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f588a695474 in ___fprintf_chk (fp=0x7f588a9508b0 <_IO_stdfile_2_lock>, flag=1, format=0x7f58765756a8 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f587655d9ad in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f587655db44 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f587655f46c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f5876555114 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f5884239db4 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f58841d42db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f5883b9b514 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f5884206468 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f5884236561 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f587df326db in start_thread (arg=0x7f58277fe700) at pthread_create.c:463
#12 0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f5827fff700 (LWP 32015)):
#0  0x00007f587df38ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f5827ffe710, expected=0, futex_word=0x7f5827ffe8f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f587df38ed9 in __pthread_cond_wait_common (abstime=0x7f5827ffe7b0, mutex=0x7f5827ffe8a8, cond=0x7f5827ffe8d0) at pthread_cond_wait.c:533
#2  0x00007f587df38ed9 in __pthread_cond_timedwait (cond=0x7f5827ffe8d0, mutex=0x7f5827ffe8a8, abstime=0x7f5827ffe7b0) at pthread_cond_wait.c:667
#3  0x00007f5884233b17 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f588423446a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f5884234552 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f58841f4fb1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f58841f77f6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f58841f7ab4 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f5884236561 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f587df326db in start_thread (arg=0x7f5827fff700) at pthread_create.c:463
#11 0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f583c9db700 (LWP 32014)):
#0  0x00007f587df38ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f583c9da710, expected=0, futex_word=0x7f583c9da8f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f587df38ed9 in __pthread_cond_wait_common (abstime=0x7f583c9da7b0, mutex=0x7f583c9da8a8, cond=0x7f583c9da8d0) at pthread_cond_wait.c:533
#2  0x00007f587df38ed9 in __pthread_cond_timedwait (cond=0x7f583c9da8d0, mutex=0x7f583c9da8a8, abstime=0x7f583c9da7b0) at pthread_cond_wait.c:667
#3  0x00007f5884233b17 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f588423446a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f5884234552 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f58841f4fb1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f58841f77f6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f58841f7ab4 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f5884236561 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f587df326db in start_thread (arg=0x7f583c9db700) at pthread_create.c:463
#11 0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f583d1dc700 (LWP 32013)):
#0  0x00007f587df38ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f583d1db710, expected=0, futex_word=0x7f583d1db8f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f587df38ed9 in __pthread_cond_wait_common (abstime=0x7f583d1db7b0, mutex=0x7f583d1db8a8, cond=0x7f583d1db8d0) at pthread_cond_wait.c:533
#2  0x00007f587df38ed9 in __pthread_cond_timedwait (cond=0x7f583d1db8d0, mutex=0x7f583d1db8a8, abstime=0x7f583d1db7b0) at pthread_cond_wait.c:667
#3  0x00007f5884233b17 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f588423446a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f5884234552 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f58841f4fb1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f58841f77f6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f58841f7ab4 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f5884236561 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f587df326db in start_thread (arg=0x7f583d1dc700) at pthread_create.c:463
#11 0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f583d9dd700 (LWP 32012)):
#0  0x00007f587df38ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f583d9dc710, expected=0, futex_word=0x7f583d9dc8f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f587df38ed9 in __pthread_cond_wait_common (abstime=0x7f583d9dc7b0, mutex=0x7f583d9dc8a8, cond=0x7f583d9dc8d0) at pthread_cond_wait.c:533
#2  0x00007f587df38ed9 in __pthread_cond_timedwait (cond=0x7f583d9dc8d0, mutex=0x7f583d9dc8a8, abstime=0x7f583d9dc7b0) at pthread_cond_wait.c:667
#3  0x00007f5884233b17 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f588423446a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f5884234552 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f58841f4fb1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f58841f77f6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f58841f7ab4 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f5884236561 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f587df326db in start_thread (arg=0x7f583d9dd700) at pthread_create.c:463
#11 0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f583e1de700 (LWP 32011)):
#0  0x00007f588a6936ac in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f588a695474 in ___fprintf_chk (fp=0x7f588a9508b0 <_IO_stdfile_2_lock>, flag=1, format=0x7f58765756a8 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f587655d9ad in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f587655db44 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f587655f46c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f5876555114 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f5884239c79 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f58841d42db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f58841fb544 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f5884206468 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f5884236561 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f587df326db in start_thread (arg=0x7f583e1de700) at pthread_create.c:463
#12 0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f58477fe700 (LWP 32009)):
#0  0x00007f588a673187 in __GI___libc_write (fd=2, buf=0x7f58477fac40, nbytes=39) at ../sysdeps/unix/sysv/linux/write.c:27
#1  0x00007f588a5ee1bd in _IO_new_file_write (f=0x7f588a94f680 <_IO_2_1_stderr_>, data=0x7f58477fac40, n=39) at fileops.c:1203
#2  0x00007f588a5eeb2f in new_do_write (to_do=<optimized out>, data=0x7f58477fac40 "[warn] epoll_wait: Bad file descriptor\n", fp=0x7f588a94f680 <_IO_2_1_stderr_>) at fileops.c:457
#3  0x00007f588a5eeb2f in _IO_new_file_xsputn (f=0x7f588a94f680 <_IO_2_1_stderr_>, data=<optimized out>, n=39) at fileops.c:1277
#4  0x00007f588a5c1707 in buffered_vfprintf (s=s@entry=0x7f588a94f680 <_IO_2_1_stderr_>, format=format@entry=0x7f58765756a8 "[%s] %s\n", args=args@entry=0x7f58477fd200) at vfprintf.c:2350
#5  0x00007f588a5be726 in _IO_vfprintf_internal (s=s@entry=0x7f588a94f680 <_IO_2_1_stderr_>, format=0x7f58765756a8 "[%s] %s\n", ap=ap@entry=0x7f58477fd200) at vfprintf.c:1301
#6  0x00007f588a6954c6 in ___fprintf_chk (fp=0x7f588a94f680 <_IO_2_1_stderr_>, flag=1, format=<optimized out>) at fprintf_chk.c:35
#7  0x00007f587655d9ad in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#8  0x00007f587655db44 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#9  0x00007f587655f46c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#10 0x00007f5876555114 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#11 0x00007f5884239c79 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f58841d42db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f5884206311 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007f5884236561 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007f587df326db in start_thread (arg=0x7f58477fe700) at pthread_create.c:463
#16 0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f5845ffb700 (LWP 32002)):
#0  0x00007f588a677bf9 in __GI___poll (fds=0x7f5820020a20, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f587bc104c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f587bc105dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f588afbadcb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f588af5c03a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f588ad834ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f588ccad015 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f588ad84c72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f587df326db in start_thread (arg=0x7f5845ffb700) at pthread_create.c:463
#9  0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f58597d4700 (LWP 31993)):
#0  0x00007f588a677bf9 in __GI___poll (fds=0x7f58597d38e8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f587b7a2747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f587b7a436a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f585bb35578 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f588ad84c72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f587df326db in start_thread (arg=0x7f58597d4700) at pthread_create.c:463
#6  0x00007f588a68488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f588e8e7bc0 (LWP 31988)):
[KCrash Handler]
#6  0x00007f588a61e57e in __memmove_sse2_unaligned_erms () at ../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:299
#7  0x00007f585855742c in  () at /usr/lib/x86_64-linux-gnu/libGLX_indirect.so.0
#8  0x00007f58585576f5 in  () at /usr/lib/x86_64-linux-gnu/libGLX_indirect.so.0
#9  0x00007f588b8c4343 in QOpenGLTextureBlitter::blit(unsigned int, QMatrix4x4 const&, QGenericMatrix<3, 3, float> const&) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#10 0x00007f588b83d0c5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#11 0x00007f588b83df78 in QPlatformBackingStore::composeAndFlush(QWindow*, QRegion const&, QPoint const&, QPlatformTextureList*, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#12 0x00007f585bb2c66b in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#13 0x00007f588bd66513 in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007f588bd67b84 in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007f588bd6927b in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007f588bd694a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007f588bd818bf in QWidgetPrivate::syncBackingStore() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007f588bd99b38 in QWidget::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007f588bea2e50 in QMainWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007f588d66ba11 in KMainWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#21 0x00007f588d6b1935 in KXmlGuiWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#22 0x00007f588bd5965c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007f588bd60b90 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007f588af5dd18 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f588af608d7 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f588afbb793 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007f587bc10317 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007f587bc10550 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007f587bc105dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007f588afbadaf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007f588af5c03a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007f588af65170 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x000056078888d9c0 in  ()
#34 0x00007f588a584b97 in __libc_start_main (main=0x56078888d490, argc=1, argv=0x7ffd7f92f1a8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd7f92f198) at ../csu/libc-start.c:310
#35 0x000056078888db5a in  ()

Reported using DrKonqi