Application: plasmashell (5.8.2)

Qt Version: 5.6.1
Frameworks Version: 5.26.0
Operating System: Linux 4.4.27-2-default x86_64
Distribution: "openSUSE Leap 42.2"

-- Information about the crash:
- What I was doing when the application crashed:
firefox was "eating" 2 Gb of ram and I killed with "pkill firefox" then I try to move into virtualbox and plasma crashed

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f8f82acb900 (LWP 2257))]

Thread 18 (Thread 0x7f4e7f7fe700 (LWP 6389)):
#0  0x00007f8f7c1f651d in read () at /lib64/libc.so.6
#1  0x00007f8f71808931 in pa_read () at /usr/lib64/pulseaudio/libpulsecommon-9.0.so
#2  0x00007f8f71e913be in pa_mainloop_prepare () at /usr/lib64/libpulse.so.0
#3  0x00007f8f71e91dd2 in pa_mainloop_iterate () at /usr/lib64/libpulse.so.0
#4  0x00007f8f71e91e90 in pa_mainloop_run () at /usr/lib64/libpulse.so.0
#5  0x00007f8f71ea0006 in  () at /usr/lib64/libpulse.so.0
#6  0x00007f8f71837408 in  () at /usr/lib64/pulseaudio/libpulsecommon-9.0.so
#7  0x00007f8f7ba03734 in start_thread () at /lib64/libpthread.so.0
#8  0x00007f8f7c202d3d in clone () at /lib64/libc.so.6

Thread 17 (Thread 0x7f4e7ffff700 (LWP 6388)):
#0  0x00007f8f7c1f651d in read () at /lib64/libc.so.6
#1  0x00007f8f71808931 in pa_read () at /usr/lib64/pulseaudio/libpulsecommon-9.0.so
#2  0x00007f8f71e913be in pa_mainloop_prepare () at /usr/lib64/libpulse.so.0
#3  0x00007f8f71e91dd2 in pa_mainloop_iterate () at /usr/lib64/libpulse.so.0
#4  0x00007f8f71e91e90 in pa_mainloop_run () at /usr/lib64/libpulse.so.0
#5  0x00007f8f71ea0006 in  () at /usr/lib64/libpulse.so.0
#6  0x00007f8f71837408 in  () at /usr/lib64/pulseaudio/libpulsecommon-9.0.so
#7  0x00007f8f7ba03734 in start_thread () at /lib64/libpthread.so.0
#8  0x00007f8f7c202d3d in clone () at /lib64/libc.so.6

Thread 16 (Thread 0x7f8ea5ffa700 (LWP 6387)):
#0  0x00007f8f7c1fa49d in poll () at /lib64/libc.so.6
#1  0x00007f8f788c2314 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f8f788c242c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f8f7cb0132b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f8f7caaefdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f8f7c8e9f1a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f8f7fbf59b8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007f8f7c8ee9e9 in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007f8f7ba03734 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f8f7c202d3d in clone () at /lib64/libc.so.6

Thread 15 (Thread 0x7f8ea67fb700 (LWP 3058)):
#0  0x00007f8f7ba080af in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f8f7c8ef65b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f8ec6beb42f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#3  0x00007f8ec6beedea in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#4  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#5  0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#6  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#7  0x00007f8ec6beca46 in ThreadWeaver::Thread::run() () at /usr/lib64/libKF5ThreadWeaver.so.5
#8  0x00007f8f7c8ee9e9 in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007f8f7ba03734 in start_thread () at /lib64/libpthread.so.0
#10 0x00007f8f7c202d3d in clone () at /lib64/libc.so.6

Thread 14 (Thread 0x7f8ea6ffc700 (LWP 3057)):
#0  0x00007f8f7ba080af in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f8f7c8ef65b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f8ec6beb42f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#3  0x00007f8ec6beedea in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#4  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#5  0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#6  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#7  0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#8  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#9  0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#10 0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#11 0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#12 0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#13 0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#14 0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#15 0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#16 0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#17 0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#18 0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#19 0x00007f8ec6beca46 in ThreadWeaver::Thread::run() () at /usr/lib64/libKF5ThreadWeaver.so.5
#20 0x00007f8f7c8ee9e9 in  () at /usr/lib64/libQt5Core.so.5
#21 0x00007f8f7ba03734 in start_thread () at /lib64/libpthread.so.0
#22 0x00007f8f7c202d3d in clone () at /lib64/libc.so.6

Thread 13 (Thread 0x7f8ea77fd700 (LWP 3056)):
#0  0x00007f8f7ba080af in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f8f7c8ef65b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f8ec6beb42f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#3  0x00007f8ec6beedea in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#4  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#5  0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#6  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#7  0x00007f8ec6beca46 in ThreadWeaver::Thread::run() () at /usr/lib64/libKF5ThreadWeaver.so.5
#8  0x00007f8f7c8ee9e9 in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007f8f7ba03734 in start_thread () at /lib64/libpthread.so.0
#10 0x00007f8f7c202d3d in clone () at /lib64/libc.so.6

Thread 12 (Thread 0x7f8ea7ffe700 (LWP 3055)):
#0  0x00007f8f7ba080af in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f8f7c8ef65b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f8ec6beb42f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#3  0x00007f8ec6beedea in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#4  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#5  0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#6  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#7  0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#8  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#9  0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#10 0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#11 0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#12 0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#13 0x00007f8ec6beca46 in ThreadWeaver::Thread::run() () at /usr/lib64/libKF5ThreadWeaver.so.5
#14 0x00007f8f7c8ee9e9 in  () at /usr/lib64/libQt5Core.so.5
#15 0x00007f8f7ba03734 in start_thread () at /lib64/libpthread.so.0
#16 0x00007f8f7c202d3d in clone () at /lib64/libc.so.6

Thread 11 (Thread 0x7f8eb0faa700 (LWP 3054)):
#0  0x00007f8f7ba080af in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f8f7c8ef65b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f8ec6beb42f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#3  0x00007f8ec6beedea in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#4  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#5  0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#6  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#7  0x00007f8ec6beca46 in ThreadWeaver::Thread::run() () at /usr/lib64/libKF5ThreadWeaver.so.5
#8  0x00007f8f7c8ee9e9 in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007f8f7ba03734 in start_thread () at /lib64/libpthread.so.0
#10 0x00007f8f7c202d3d in clone () at /lib64/libc.so.6

Thread 10 (Thread 0x7f8eb17ab700 (LWP 3053)):
#0  0x00007f8f7ba080af in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f8f7c8ef65b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f8ec6beb42f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#3  0x00007f8ec6beedea in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#4  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#5  0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#6  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#7  0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#8  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#9  0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#10 0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#11 0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#12 0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#13 0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#14 0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#15 0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#16 0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#17 0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#18 0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#19 0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#20 0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#21 0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#22 0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#23 0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#24 0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#25 0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#26 0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#27 0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#28 0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#29 0x00007f8ec6beca46 in ThreadWeaver::Thread::run() () at /usr/lib64/libKF5ThreadWeaver.so.5
#30 0x00007f8f7c8ee9e9 in  () at /usr/lib64/libQt5Core.so.5
#31 0x00007f8f7ba03734 in start_thread () at /lib64/libpthread.so.0
#32 0x00007f8f7c202d3d in clone () at /lib64/libc.so.6

Thread 9 (Thread 0x7f8eb1fac700 (LWP 3052)):
#0  0x00007f8f7ba080af in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f8f7c8ef65b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f8ec6beb42f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#3  0x00007f8ec6beedea in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#4  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#5  0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#6  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#7  0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#8  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#9  0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#10 0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#11 0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#12 0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#13 0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#14 0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#15 0x00007f8ec6beca46 in ThreadWeaver::Thread::run() () at /usr/lib64/libKF5ThreadWeaver.so.5
#16 0x00007f8f7c8ee9e9 in  () at /usr/lib64/libQt5Core.so.5
#17 0x00007f8f7ba03734 in start_thread () at /lib64/libpthread.so.0
#18 0x00007f8f7c202d3d in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7f8eb40d3700 (LWP 3051)):
#0  0x00007f8f7ba080af in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f8f7c8ef65b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f8ec6beb42f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#3  0x00007f8ec6beedea in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#4  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#5  0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#6  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#7  0x00007f8ec6beee32 in  () at /usr/lib64/libKF5ThreadWeaver.so.5
#8  0x00007f8ec6be945b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib64/libKF5ThreadWeaver.so.5
#9  0x00007f8ec6beca46 in ThreadWeaver::Thread::run() () at /usr/lib64/libKF5ThreadWeaver.so.5
#10 0x00007f8f7c8ee9e9 in  () at /usr/lib64/libQt5Core.so.5
#11 0x00007f8f7ba03734 in start_thread () at /lib64/libpthread.so.0
#12 0x00007f8f7c202d3d in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7f8ec329d700 (LWP 2921)):
#0  0x00007f8f789037b9 in g_mutex_lock () at /usr/lib64/libglib-2.0.so.0
#1  0x00007f8f788c1969 in g_main_context_prepare () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f8f788c2230 in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f8f788c242c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#4  0x00007f8f7cb0132b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f8f7caaefdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007f8f7c8e9f1a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#7  0x00007f8ec46c58f7 in KCupsConnection::run() () at /usr/lib64/libkcupslib.so
#8  0x00007f8f7c8ee9e9 in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007f8f7ba03734 in start_thread () at /lib64/libpthread.so.0
#10 0x00007f8f7c202d3d in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f8f59115700 (LWP 2471)):
#0  0x00007f8f7ba080af in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f8f821b193b in  () at /usr/lib64/libQt5Script.so.5
#2  0x00007f8f821b1969 in  () at /usr/lib64/libQt5Script.so.5
#3  0x00007f8f7ba03734 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f8f7c202d3d in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f8f5adad700 (LWP 2455)):
#0  0x00007f8f7c1fa49d in poll () at /lib64/libc.so.6
#1  0x00007f8f788c2314 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f8f788c242c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f8f7cb0132b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f8f7caaefdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f8f7c8e9f1a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f8f7fbf59b8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007f8f7c8ee9e9 in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007f8f7ba03734 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f8f7c202d3d in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f8f68998700 (LWP 2370)):
#0  0x00007f8f7c1fa49d in poll () at /lib64/libc.so.6
#1  0x00007f8f788c2314 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f8f788c242c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f8f7cb0132b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f8f7caaefdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f8f7c8e9f1a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f8f7fbf59b8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007f8f7c8ee9e9 in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007f8f7ba03734 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f8f7c202d3d in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f8f6a3df700 (LWP 2286)):
#0  0x00007f8f7c1f651d in read () at /lib64/libc.so.6
#1  0x00007f8f78902670 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f8f788c1e49 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f8f788c22a8 in  () at /usr/lib64/libglib-2.0.so.0
#4  0x00007f8f788c242c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#5  0x00007f8f7cb0132b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007f8f7caaefdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#7  0x00007f8f7c8e9f1a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#8  0x00007f8f7d66a1d5 in  () at /usr/lib64/libQt5DBus.so.5
#9  0x00007f8f7c8ee9e9 in  () at /usr/lib64/libQt5Core.so.5
#10 0x00007f8f7ba03734 in start_thread () at /lib64/libpthread.so.0
#11 0x00007f8f7c202d3d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f8f6bfe5700 (LWP 2266)):
#0  0x00007f8f7c1fa49d in poll () at /lib64/libc.so.6
#1  0x00007f8f8112c3e2 in  () at /usr/lib64/libxcb.so.1
#2  0x00007f8f8112dfcf in xcb_wait_for_event () at /usr/lib64/libxcb.so.1
#3  0x00007f8f6e33b839 in  () at /usr/lib64/libQt5XcbQpa.so.5
#4  0x00007f8f7c8ee9e9 in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f8f7ba03734 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f8f7c202d3d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f8f82acb900 (LWP 2257)):
[KCrash Handler]
#6  0x00007f8f7ca7c1b0 in  () at /usr/lib64/libQt5Core.so.5
#7  0x00007f8f7ca7c48f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007f8f7ca83329 in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007f8f7cadabb1 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#10 0x00007f8f7cb51274 in QAbstractItemModel::rowsRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib64/libQt5Core.so.5
#11 0x00007f8f7ca5fb21 in QAbstractItemModel::endRemoveRows() () at /usr/lib64/libQt5Core.so.5
#12 0x00007f8ec9bbefff in TaskManager::TaskGroupingProxyModel::Private::sourceRowsAboutToBeRemoved(QModelIndex const&, int, int) () at /usr/lib64/libtaskmanager.so.6
#13 0x00007f8ec9bc1b69 in  () at /usr/lib64/libtaskmanager.so.6
#14 0x00007f8f7cadabb1 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#15 0x00007f8f7cb51224 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib64/libQt5Core.so.5
#16 0x00007f8f7ca5f2a4 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib64/libQt5Core.so.5
#17 0x00007f8f7ca7de0d in  () at /usr/lib64/libQt5Core.so.5
#18 0x00007f8f7ca7dfbd in  () at /usr/lib64/libQt5Core.so.5
#19 0x00007f8f7ca83308 in  () at /usr/lib64/libQt5Core.so.5
#20 0x00007f8f7cadabb1 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#21 0x00007f8f7cb51224 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib64/libQt5Core.so.5
#22 0x00007f8f7ca5f2a4 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib64/libQt5Core.so.5
#23 0x00007f8ec995aed5 in  () at /usr/lib64/libKF5ItemModels.so.5
#24 0x00007f8ec995bbb9 in  () at /usr/lib64/libKF5ItemModels.so.5
#25 0x00007f8f7cadabb1 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#26 0x00007f8f7cb51224 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib64/libQt5Core.so.5
#27 0x00007f8f7ca5f2a4 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib64/libQt5Core.so.5
#28 0x00007f8f7ca772af in  () at /usr/lib64/libQt5Core.so.5
#29 0x00007f8f7cadabb1 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#30 0x00007f8f7cb51224 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib64/libQt5Core.so.5
#31 0x00007f8f7ca5f2a4 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib64/libQt5Core.so.5
#32 0x00007f8ec9bd8cd3 in TaskManager::XWindowTasksModel::Private::removeWindow(unsigned long long) () at /usr/lib64/libtaskmanager.so.6
#33 0x00007f8f7cadb1c3 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#34 0x00007f8f7f712302 in KWindowSystem::windowRemoved(unsigned long long) () at /usr/lib64/libKF5WindowSystem.so.5
#35 0x00007f8f68db9935 in  () at /usr/lib64/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#36 0x00007f8f7f70aca1 in NETRootInfo::update(QFlags<NET::Property>, QFlags<NET::Property2>) () at /usr/lib64/libKF5WindowSystem.so.5
#37 0x00007f8f7f70bb72 in NETRootInfo::event(xcb_generic_event_t*, QFlags<NET::Property>*, QFlags<NET::Property2>*) () at /usr/lib64/libKF5WindowSystem.so.5
#38 0x00007f8f7f70bda2 in NETRootInfo::event(xcb_generic_event_t*, unsigned long*, int) () at /usr/lib64/libKF5WindowSystem.so.5
#39 0x00007f8f68db9306 in  () at /usr/lib64/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#40 0x00007f8f7caae270 in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib64/libQt5Core.so.5
#41 0x00007f8f6e339be4 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib64/libQt5XcbQpa.so.5
#42 0x00007f8f6e33bc3b in QXcbConnection::processXcbEvents() () at /usr/lib64/libQt5XcbQpa.so.5
#43 0x00007f8f7cadc166 in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5
#44 0x00007f8f7da38e3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#45 0x00007f8f7da3d49a in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#46 0x00007f8f7cab0fc5 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#47 0x00007f8f7cab2daa in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/libQt5Core.so.5
#48 0x00007f8f7cb01c83 in  () at /usr/lib64/libQt5Core.so.5
#49 0x00007f8f788c2134 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#50 0x00007f8f788c2388 in  () at /usr/lib64/libglib-2.0.so.0
#51 0x00007f8f788c242c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#52 0x00007f8f7cb0130c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#53 0x00007f8f7caaefdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#54 0x00007f8f7cab6ec6 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5
#55 0x000000000041ea6f in  ()
#56 0x00007f8f7c1396e5 in __libc_start_main () at /lib64/libc.so.6
#57 0x000000000041ecd9 in _start ()

Reported using DrKonqi