Application: kontact (5.7.3)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 5.4.0-51-generic x86_64
Distribution: Ubuntu 18.04.5 LTS

-- Information about the crash:
When I right clicked on the Koncat icon in notification bar and select Exit, the appliation chrashed and asked me to report that as an issue.

-- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f691729b080 (LWP 4968))]

Thread 28 (Thread 0x7f679d373700 (LWP 5093)):
#0  0x00007f69135109f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5605b5a7a4ec) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f69135109f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5605b5a7a498, cond=0x5605b5a7a4c0) at pthread_cond_wait.c:502
#2  0x00007f69135109f3 in __pthread_cond_wait (cond=0x5605b5a7a4c0, mutex=0x5605b5a7a498) at pthread_cond_wait.c:655
#3  0x00007f69047bdc95 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f69047be177 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f69047bef11 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f69047bb5eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f691350a6db in start_thread (arg=0x7f679d373700) at pthread_create.c:463
#8  0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 27 (Thread 0x7f67b3fff700 (LWP 5018)):
#0  0x00007f69135109f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5605b5ea6810) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f69135109f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5605b5ea67c0, cond=0x5605b5ea67e8) at pthread_cond_wait.c:502
#2  0x00007f69135109f3 in __pthread_cond_wait (cond=0x5605b5ea67e8, mutex=0x5605b5ea67c0) at pthread_cond_wait.c:655
#3  0x00007f69143655ab in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f691435dc1b in QSemaphore::acquire(int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f67b95c380c in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/texttospeech/libqttexttospeech_flite.so
#6  0x00007f691436417d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f691350a6db in start_thread (arg=0x7f67b3fff700) at pthread_create.c:463
#8  0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 26 (Thread 0x7f67cd837700 (LWP 5004)):
#0  0x00007f6913a3acf9 in __GI___poll (fds=0x7f67c8004a10, nfds=1, timeout=10043) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f690d7445c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f690d7446dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f691459b8ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f691454090a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f691435f23a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f691436417d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f691350a6db in start_thread (arg=0x7f67cd837700) at pthread_create.c:463
#8  0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7f685b7fe700 (LWP 5001)):
#0  0x00007f69135109f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f68fe5dbfb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f69135109f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f68fe5dbf68, cond=0x7f68fe5dbf90) at pthread_cond_wait.c:502
#2  0x00007f69135109f3 in __pthread_cond_wait (cond=0x7f68fe5dbf90, mutex=0x7f68fe5dbf68) at pthread_cond_wait.c:655
#3  0x00007f68fe2e55f4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007f68fe2e5639 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007f691350a6db in start_thread (arg=0x7f685b7fe700) at pthread_create.c:463
#6  0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7f685bfff700 (LWP 4999)):
#0  0x00007f69135109f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5605b5a7a4e8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f69135109f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5605b5a7a498, cond=0x5605b5a7a4c0) at pthread_cond_wait.c:502
#2  0x00007f69135109f3 in __pthread_cond_wait (cond=0x5605b5a7a4c0, mutex=0x5605b5a7a498) at pthread_cond_wait.c:655
#3  0x00007f69047bdc95 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f69047be177 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f69047bef11 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f69047bb5eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f691350a6db in start_thread (arg=0x7f685bfff700) at pthread_create.c:463
#8  0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7f688cff9700 (LWP 4998)):
#0  0x00007f6913a36297 in __GI___libc_write (fd=2, buf=0x7f688cff5ac0, nbytes=39) at ../sysdeps/unix/sysv/linux/write.c:27
#1  0x00007f69139b122d in _IO_new_file_write (f=0x7f6913d12680 <_IO_2_1_stderr_>, data=0x7f688cff5ac0, n=39) at fileops.c:1203
#2  0x00007f69139b1b9f in new_do_write (to_do=<optimized out>, data=0x7f688cff5ac0 "[warn] epoll_wait: Bad file descriptor\n", fp=0x7f6913d12680 <_IO_2_1_stderr_>) at fileops.c:457
#3  0x00007f69139b1b9f in _IO_new_file_xsputn (f=0x7f6913d12680 <_IO_2_1_stderr_>, data=<optimized out>, n=39) at fileops.c:1277
#4  0x00007f6913984787 in buffered_vfprintf (s=s@entry=0x7f6913d12680 <_IO_2_1_stderr_>, format=format@entry=0x7f68fcee96a8 "[%s] %s\n", args=args@entry=0x7f688cff8080) at vfprintf.c:2350
#5  0x00007f69139817b6 in _IO_vfprintf_internal (s=s@entry=0x7f6913d12680 <_IO_2_1_stderr_>, format=0x7f68fcee96a8 "[%s] %s\n", ap=ap@entry=0x7f688cff8080) at vfprintf.c:1301
#6  0x00007f6913a58676 in ___fprintf_chk (fp=0x7f6913d12680 <_IO_2_1_stderr_>, flag=1, format=<optimized out>) at fprintf_chk.c:35
#7  0x00007f68fced19ad in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#8  0x00007f68fced1b44 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#9  0x00007f68fced346c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#10 0x00007f68fcec9114 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#11 0x00007f690478eab9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f690478ada8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f69047a777b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007f69047bf4d6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007f69047bb5eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007f691350a6db in start_thread (arg=0x7f688cff9700) at pthread_create.c:463
#17 0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7f688d7fa700 (LWP 4997)):
#0  0x00007f69135109f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f688d7f9738) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f69135109f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f688d7f96e8, cond=0x7f688d7f9710) at pthread_cond_wait.c:502
#2  0x00007f69135109f3 in __pthread_cond_wait (cond=0x7f688d7f9710, mutex=0x7f688d7f96e8) at pthread_cond_wait.c:655
#3  0x00007f69047b3999 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f69047b39c7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f690478e4db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f690478ada8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f69047a777b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f69047bf4d6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f69047bb5eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f691350a6db in start_thread (arg=0x7f688d7fa700) at pthread_create.c:463
#11 0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7f688dffb700 (LWP 4996)):
#0  0x00007f68e4bf6d9a in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#1  0x00007f68e4bf789f in pa_fdsem_after_poll () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#2  0x00007f68e4c0f35d in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#3  0x00007f68e5074108 in pa_mainloop_dispatch () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f68e50744de in pa_mainloop_iterate () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f68e5074560 in pa_mainloop_run () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f68e50823c9 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#7  0x00007f68e4c1f318 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#8  0x00007f691350a6db in start_thread (arg=0x7f688dffb700) at pthread_create.c:463
#9  0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7f688e7fc700 (LWP 4995)):
#0  0x00007f6913510ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f688e7fb5d0, expected=0, futex_word=0x7f688e7fb758) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f6913510ed9 in __pthread_cond_wait_common (abstime=0x7f688e7fb670, mutex=0x7f688e7fb708, cond=0x7f688e7fb730) at pthread_cond_wait.c:533
#2  0x00007f6913510ed9 in __pthread_cond_timedwait (cond=0x7f688e7fb730, mutex=0x7f688e7fb708, abstime=0x7f688e7fb670) at pthread_cond_wait.c:667
#3  0x00007f69047ec652 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f69047b391e in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f690478e52b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f690478ada8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f69047a777b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f69047bf4d6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f69047bb5eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f691350a6db in start_thread (arg=0x7f688e7fc700) at pthread_create.c:463
#11 0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7f688effd700 (LWP 4994)):
#0  0x00007f69135109f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5605b5a8af98) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f69135109f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5605b5a8aed8, cond=0x5605b5a8af70) at pthread_cond_wait.c:502
#2  0x00007f69135109f3 in __pthread_cond_wait (cond=0x5605b5a8af70, mutex=0x5605b5a8aed8) at pthread_cond_wait.c:655
#3  0x00007f6904f45060 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f69047bef11 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f69047bb5eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f691350a6db in start_thread (arg=0x7f688effd700) at pthread_create.c:463
#7  0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7f688f7fe700 (LWP 4993)):
#0  0x00007f69135109f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5605b5a7a4ec) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f69135109f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5605b5a7a498, cond=0x5605b5a7a4c0) at pthread_cond_wait.c:502
#2  0x00007f69135109f3 in __pthread_cond_wait (cond=0x5605b5a7a4c0, mutex=0x5605b5a7a498) at pthread_cond_wait.c:655
#3  0x00007f69047bdc95 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f69047be177 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f69047bef11 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f69047bb5eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f691350a6db in start_thread (arg=0x7f688f7fe700) at pthread_create.c:463
#8  0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f688ffff700 (LWP 4992)):
#0  0x00007f69135109f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f688fffe738) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f69135109f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f688fffe6e8, cond=0x7f688fffe710) at pthread_cond_wait.c:502
#2  0x00007f69135109f3 in __pthread_cond_wait (cond=0x7f688fffe710, mutex=0x7f688fffe6e8) at pthread_cond_wait.c:655
#3  0x00007f69047b3999 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f69047b39c7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f690478e4db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f690478ada8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f69047a777b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f69047bf4d6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f69047bb5eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f691350a6db in start_thread (arg=0x7f688ffff700) at pthread_create.c:463
#11 0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f68b0ff9700 (LWP 4991)):
#0  0x00007f6913a5685c in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f6913a58624 in ___fprintf_chk (fp=0x7f6913d138b0 <_IO_stdfile_2_lock>, flag=1, format=0x7f68fcee96a8 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f68fced19ad in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f68fced1b44 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f68fced346c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f68fcec9114 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f690478ebf3 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f690478ada8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f69047a777b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6904045978 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f6904045f2b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f69047bf588 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f69047bb5eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f691350a6db in start_thread (arg=0x7f68b0ff9700) at pthread_create.c:463
#14 0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f68b17fa700 (LWP 4990)):
#0  0x00007f6913510ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f68b17f91f0, expected=0, futex_word=0x7f68b17f9378) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f6913510ed9 in __pthread_cond_wait_common (abstime=0x7f68b17f9290, mutex=0x7f68b17f9328, cond=0x7f68b17f9350) at pthread_cond_wait.c:533
#2  0x00007f6913510ed9 in __pthread_cond_timedwait (cond=0x7f68b17f9350, mutex=0x7f68b17f9328, abstime=0x7f68b17f9290) at pthread_cond_wait.c:667
#3  0x00007f69047ec652 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f69047b391e in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f690478e52b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f690478ada8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f69047a777b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f69040458c8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6904045f1b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f69047bf588 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f69047bb5eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f691350a6db in start_thread (arg=0x7f68b17fa700) at pthread_create.c:463
#13 0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f68b1ffb700 (LWP 4989)):
#0  0x00007f69135109f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f68b1ffa358) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f69135109f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f68b1ffa308, cond=0x7f68b1ffa330) at pthread_cond_wait.c:502
#2  0x00007f69135109f3 in __pthread_cond_wait (cond=0x7f68b1ffa330, mutex=0x7f68b1ffa308) at pthread_cond_wait.c:655
#3  0x00007f69047b3999 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f69047b39c7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f690478e4db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f690478ada8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f69047a777b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f6904045818 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6904045f0b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f69047bf588 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f69047bb5eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f691350a6db in start_thread (arg=0x7f68b1ffb700) at pthread_create.c:463
#13 0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f68b27fc700 (LWP 4988)):
#0  0x00007f69135109f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f68b27fb358) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f69135109f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f68b27fb308, cond=0x7f68b27fb330) at pthread_cond_wait.c:502
#2  0x00007f69135109f3 in __pthread_cond_wait (cond=0x7f68b27fb330, mutex=0x7f68b27fb308) at pthread_cond_wait.c:655
#3  0x00007f69047b3999 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f69047b39c7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f690478e4db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f690478ada8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f69047a777b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f6904045768 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6904045efb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f69047bf588 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f69047bb5eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f691350a6db in start_thread (arg=0x7f68b27fc700) at pthread_create.c:463
#13 0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f68b2ffd700 (LWP 4987)):
#0  0x00007f6913a56889 in __lll_unlock_wake_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:341
#1  0x00007f6913a586bc in _IO_acquire_lock_clear_flags2_fct (p=<synthetic pointer>) at ../libio/libioP.h:807
#2  0x00007f6913a586bc in ___fprintf_chk (fp=0x7f6913d12680 <_IO_2_1_stderr_>, flag=1, format=<optimized out>) at fprintf_chk.c:30
#3  0x00007f68fced19ad in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f68fced1b44 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f68fced346c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f68fcec9114 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#7  0x00007f690478eab9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f690478ada8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f69047a777b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f69040456b8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f6904045eeb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f69047bf588 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f69047bb5eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007f691350a6db in start_thread (arg=0x7f68b2ffd700) at pthread_create.c:463
#15 0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f68b37fe700 (LWP 4986)):
#0  0x00007f69135109f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f68b37fd358) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f69135109f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f68b37fd308, cond=0x7f68b37fd330) at pthread_cond_wait.c:502
#2  0x00007f69135109f3 in __pthread_cond_wait (cond=0x7f68b37fd330, mutex=0x7f68b37fd308) at pthread_cond_wait.c:655
#3  0x00007f69047b3999 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f69047b39c7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f690478e4db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f690478ada8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f69047a777b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f6904045608 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6904045edb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f69047bf588 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f69047bb5eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f691350a6db in start_thread (arg=0x7f68b37fe700) at pthread_create.c:463
#13 0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f68c1669700 (LWP 4983)):
#0  0x00007f69135109f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f68c1668738) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f69135109f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f68c16686e8, cond=0x7f68c1668710) at pthread_cond_wait.c:502
#2  0x00007f69135109f3 in __pthread_cond_wait (cond=0x7f68c1668710, mutex=0x7f68c16686e8) at pthread_cond_wait.c:655
#3  0x00007f69047b3999 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f69047b39c7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f690478e4db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f690478ada8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f69047a777b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f69047bf4d6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f69047bb5eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f691350a6db in start_thread (arg=0x7f68c1669700) at pthread_create.c:463
#11 0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f68c1e6a700 (LWP 4982)):
#0  0x00007f6913a5685c in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f6913a58624 in ___fprintf_chk (fp=0x7f6913d138b0 <_IO_stdfile_2_lock>, flag=1, format=0x7f68fcee96a8 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f68fced19ad in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f68fced1b44 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f68fced346c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f68fcec9114 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f690478eb0d in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f690478ada8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f69047a777b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f69047bf4d6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f69047bb5eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f691350a6db in start_thread (arg=0x7f68c1e6a700) at pthread_create.c:463
#12 0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f68c266b700 (LWP 4981)):
#0  0x00007f6913a0a722 in __GI___waitpid (pid=4978, stat_loc=0x0, options=0) at ../sysdeps/unix/sysv/linux/waitpid.c:30
#1  0x00007f69047a34be in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007f69047bb5eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007f691350a6db in start_thread (arg=0x7f68c266b700) at pthread_create.c:463
#4  0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f68d8a0c700 (LWP 4975)):
#0  0x00007f6913a3acf9 in __GI___poll (fds=0x7f68c801c4e0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f690d7445c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f690d7446dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f691459b8ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f691454090a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f691435f23a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f691288bd45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f691436417d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f691350a6db in start_thread (arg=0x7f68d8a0c700) at pthread_create.c:463
#9  0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f68daa55700 (LWP 4974)):
#0  0x00007f69135109f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f68e0002f1c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f69135109f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f68e0002ec8, cond=0x7f68e0002ef0) at pthread_cond_wait.c:502
#2  0x00007f69135109f3 in __pthread_cond_wait (cond=0x7f68e0002ef0, mutex=0x7f68e0002ec8) at pthread_cond_wait.c:655
#3  0x00007f68de4999ab in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f68de499597 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f691350a6db in start_thread (arg=0x7f68daa55700) at pthread_create.c:463
#6  0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f68db256700 (LWP 4973)):
#0  0x00007f69135109f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f68e0002f1c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f69135109f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f68e0002ec8, cond=0x7f68e0002ef0) at pthread_cond_wait.c:502
#2  0x00007f69135109f3 in __pthread_cond_wait (cond=0x7f68e0002ef0, mutex=0x7f68e0002ec8) at pthread_cond_wait.c:655
#3  0x00007f68de4999ab in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f68de499597 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f691350a6db in start_thread (arg=0x7f68db256700) at pthread_create.c:463
#6  0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f68dba57700 (LWP 4972)):
#0  0x00007f69135109f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f68e0002f1c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f69135109f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f68e0002ec8, cond=0x7f68e0002ef0) at pthread_cond_wait.c:502
#2  0x00007f69135109f3 in __pthread_cond_wait (cond=0x7f68e0002ef0, mutex=0x7f68e0002ec8) at pthread_cond_wait.c:655
#3  0x00007f68de4999ab in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f68de499597 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f691350a6db in start_thread (arg=0x7f68dba57700) at pthread_create.c:463
#6  0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f68dc258700 (LWP 4971)):
#0  0x00007f69135109f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f68e0002f1c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f69135109f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f68e0002ec8, cond=0x7f68e0002ef0) at pthread_cond_wait.c:502
#2  0x00007f69135109f3 in __pthread_cond_wait (cond=0x7f68e0002ef0, mutex=0x7f68e0002ec8) at pthread_cond_wait.c:655
#3  0x00007f68de4999ab in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f68de499597 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f691350a6db in start_thread (arg=0x7f68dc258700) at pthread_create.c:463
#6  0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f68e7c55700 (LWP 4970)):
#0  0x00007f6913a3acf9 in __GI___poll (fds=0x7f68e7c54928, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f690f000747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f690f00236a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f68e99505e9 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f691436417d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f691350a6db in start_thread (arg=0x7f68e7c55700) at pthread_create.c:463
#6  0x00007f6913a47a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f691729b080 (LWP 4968)):
[KCrash Handler]
#6  0x00007f69152fab8f in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#7  0x00007f69152faf99 in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#8  0x00007f69145720e0 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f69152ff75b in QWidget::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x00007f69152c083c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007f69152c8104 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007f69145428d8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f691454504d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007f690afd0dfd in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007f690afd1130 in QQuickRenderControl::~QQuickRenderControl() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#16 0x00007f690b587fa3 in  () at /usr/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#17 0x00007f690b5865fb in  () at /usr/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#18 0x00007f690b586679 in  () at /usr/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#19 0x00007f69145789b3 in QObject::~QObject() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007f69152fade6 in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007f6911f76931 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineWidgets.so.5
#22 0x00007f6903dff28a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#23 0x00007f6903dff3f9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#24 0x00007f69042b227f in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#25 0x00007f69042a7002 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#26 0x00007f6904100ef9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#27 0x00007f690412db1f in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#28 0x00007f690412e109 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#29 0x00007f690413431d in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#30 0x00007f69041038a1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#31 0x00007f69040fe91a in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#32 0x00007f6904376cf6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#33 0x00007f6904376fb9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#34 0x00007f6903e1ac9e in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#35 0x00007f6903e1af5a in QtWebEngineCore::WebContentsAdapter::~WebContentsAdapter() () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#36 0x00007f6911f66e22 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineWidgets.so.5
#37 0x00007f6911f66e79 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineWidgets.so.5
#38 0x00007f6911f61573 in QWebEnginePage::~QWebEnginePage() () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineWidgets.so.5
#39 0x00007f6916acd4b7 in  () at /usr/lib/x86_64-linux-gnu/libkontactprivate.so.5
#40 0x00007f691456f13b in QObjectPrivate::deleteChildren() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#41 0x00007f69152fad5c in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#42 0x00007f6916acd641 in  () at /usr/lib/x86_64-linux-gnu/libkontactprivate.so.5
#43 0x00007f691456f13b in QObjectPrivate::deleteChildren() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#44 0x00007f69152fad5c in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#45 0x00007f69152faf99 in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#46 0x00007f691456f13b in QObjectPrivate::deleteChildren() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#47 0x00007f69152fad5c in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#48 0x00007f691546a3b9 in QStackedWidget::~QStackedWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#49 0x00007f691456f13b in QObjectPrivate::deleteChildren() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#50 0x00007f69152fad5c in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#51 0x00007f6915469679 in QSplitter::~QSplitter() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#52 0x00007f691456f13b in QObjectPrivate::deleteChildren() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#53 0x00007f69152fad5c in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#54 0x00007f69152faf99 in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#55 0x00007f691456f13b in QObjectPrivate::deleteChildren() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#56 0x00007f69152fad5c in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#57 0x00007f691640473d in KMainWindow::~KMainWindow() () at /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#58 0x00007f6916ad2b8e in Kontact::MainWindow::~MainWindow() () at /usr/lib/x86_64-linux-gnu/libkontactprivate.so.5
#59 0x00007f6916ad2ce9 in Kontact::MainWindow::~MainWindow() () at /usr/lib/x86_64-linux-gnu/libkontactprivate.so.5
#60 0x00005605b45c84cf in  ()
#61 0x00007f6913947b97 in __libc_start_main (main=0x5605b45c7630, argc=1, argv=0x7fffd0db0138, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffd0db0128) at ../csu/libc-start.c:310
#62 0x00005605b45c8aea in _start ()

Possible duplicates by query: bug 427323, bug 423803, bug 416136, bug 414728, bug 413345.

Reported using DrKonqi