Application: plasmashell (5.9.2)

Qt Version: 5.8.0
Frameworks Version: 5.31.0
Operating System: Linux 4.9.9-1-rt6-MANJARO x86_64
Distribution: "Manjaro Linux"

-- Information about the crash:
- What I was doing when the application crashed:
Ran a Matlab script in Matlab. It creates some transfer functions and shows the figures. Maybe the creation of windows made KDE crash.

The crash does not seem to be reproducible.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f125162a800 (LWP 891))]

Thread 19 (Thread 0x7ed12d4ec700 (LWP 9815)):
#0  0x00007f1245b69db9 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0
#1  0x00007f1245b23b67 in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#2  0x00007f1245b246ab in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007f1245b2489c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007f124b62a06b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f124b5d389a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f124b3f5a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007f124e52f025 in  () at /usr/lib/libQt5Qml.so.5
#8  0x00007f124b3fa6d8 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f124a2c5454 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f124ad0f7df in clone () at /usr/lib/libc.so.6

Thread 18 (Thread 0x7f114cff9700 (LWP 6236)):
#0  0x00007f124a2cb10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f124b3fb58b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f119518c1d0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#3  0x00007f11951909d8 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#4  0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#5  0x00007f1195190a32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#6  0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#7  0x00007f119518e249 in ThreadWeaver::Thread::run() () at /usr/lib/libKF5ThreadWeaver.so.5
#8  0x00007f124b3fa6d8 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f124a2c5454 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f124ad0f7df in clone () at /usr/lib/libc.so.6

Thread 17 (Thread 0x7f114d7fa700 (LWP 6235)):
#0  0x00007f124a2cb10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f124b3fb58b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f119518c1d0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#3  0x00007f11951909d8 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#4  0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#5  0x00007f1195190a32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#6  0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#7  0x00007f1195190a32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#8  0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#9  0x00007f1195190a32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#10 0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#11 0x00007f1195190a32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#12 0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#13 0x00007f119518e249 in ThreadWeaver::Thread::run() () at /usr/lib/libKF5ThreadWeaver.so.5
#14 0x00007f124b3fa6d8 in  () at /usr/lib/libQt5Core.so.5
#15 0x00007f124a2c5454 in start_thread () at /usr/lib/libpthread.so.0
#16 0x00007f124ad0f7df in clone () at /usr/lib/libc.so.6

Thread 16 (Thread 0x7f114dffb700 (LWP 6234)):
#0  0x00007f124a2cb10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f124b3fb58b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f119518c1d0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#3  0x00007f11951909d8 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#4  0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#5  0x00007f1195190a32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#6  0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#7  0x00007f119518e249 in ThreadWeaver::Thread::run() () at /usr/lib/libKF5ThreadWeaver.so.5
#8  0x00007f124b3fa6d8 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f124a2c5454 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f124ad0f7df in clone () at /usr/lib/libc.so.6

Thread 15 (Thread 0x7f114e7fc700 (LWP 6233)):
#0  0x00007f124a2cb10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f124b3fb58b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f119518c1d0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#3  0x00007f11951909d8 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#4  0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#5  0x00007f1195190a32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#6  0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#7  0x00007f119518e249 in ThreadWeaver::Thread::run() () at /usr/lib/libKF5ThreadWeaver.so.5
#8  0x00007f124b3fa6d8 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f124a2c5454 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f124ad0f7df in clone () at /usr/lib/libc.so.6

Thread 14 (Thread 0x7f114effd700 (LWP 6232)):
#0  0x00007f124a2cb10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f124b3fb58b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f119518c1d0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#3  0x00007f11951909d8 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#4  0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#5  0x00007f1195190a32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#6  0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#7  0x00007f1195190a32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#8  0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#9  0x00007f1195190a32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#10 0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#11 0x00007f1195190a32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#12 0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#13 0x00007f1195190a32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#14 0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#15 0x00007f119518e249 in ThreadWeaver::Thread::run() () at /usr/lib/libKF5ThreadWeaver.so.5
#16 0x00007f124b3fa6d8 in  () at /usr/lib/libQt5Core.so.5
#17 0x00007f124a2c5454 in start_thread () at /usr/lib/libpthread.so.0
#18 0x00007f124ad0f7df in clone () at /usr/lib/libc.so.6

Thread 13 (Thread 0x7f114f7fe700 (LWP 6231)):
#0  0x00007f124a2cb10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f124b3fb58b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f119518c1d0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#3  0x00007f11951909d8 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#4  0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#5  0x00007f1195190a32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#6  0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#7  0x00007f119518e249 in ThreadWeaver::Thread::run() () at /usr/lib/libKF5ThreadWeaver.so.5
#8  0x00007f124b3fa6d8 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f124a2c5454 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f124ad0f7df in clone () at /usr/lib/libc.so.6

Thread 12 (Thread 0x7f114ffff700 (LWP 6230)):
#0  0x00007f124a2cb10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f124b3fb58b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f119518c1d0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#3  0x00007f11951909d8 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#4  0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#5  0x00007f1195190a32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#6  0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#7  0x00007f119518e249 in ThreadWeaver::Thread::run() () at /usr/lib/libKF5ThreadWeaver.so.5
#8  0x00007f124b3fa6d8 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f124a2c5454 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f124ad0f7df in clone () at /usr/lib/libc.so.6

Thread 11 (Thread 0x7f116ffff700 (LWP 6229)):
#0  0x00007f124a2cb10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f124b3fb58b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f119518c1d0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#3  0x00007f11951909d8 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#4  0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#5  0x00007f1195190a32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#6  0x00007f119518b263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#7  0x00007f119518e249 in ThreadWeaver::Thread::run() () at /usr/lib/libKF5ThreadWeaver.so.5
#8  0x00007f124b3fa6d8 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f124a2c5454 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f124ad0f7df in clone () at /usr/lib/libc.so.6

Thread 10 (Thread 0x7f116e7fd700 (LWP 1488)):
#0  0x00007f123dcd75c5 in pa_fdsem_before_poll () at /usr/lib/pulseaudio/libpulsecommon-10.0.so
#1  0x00007f123dcef217 in  () at /usr/lib/pulseaudio/libpulsecommon-10.0.so
#2  0x00007f123e36099c in pa_mainloop_dispatch () at /usr/lib/libpulse.so.0
#3  0x00007f123e360d9c in pa_mainloop_iterate () at /usr/lib/libpulse.so.0
#4  0x00007f123e360e40 in pa_mainloop_run () at /usr/lib/libpulse.so.0
#5  0x00007f123e36ee29 in  () at /usr/lib/libpulse.so.0
#6  0x00007f123dcfefe8 in  () at /usr/lib/pulseaudio/libpulsecommon-10.0.so
#7  0x00007f124a2c5454 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f124ad0f7df in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7f116f7fe700 (LWP 1487)):
#0  0x00007f124ad0648d in poll () at /usr/lib/libc.so.6
#1  0x00007f1245b24786 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f1245b2489c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f124b62a06b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f124b5d389a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f124b3f5a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f124e52f025 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f124b3fa6d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f124a2c5454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f124ad0f7df in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7f118297f700 (LWP 1157)):
#0  0x00007f124ad06460 in poll () at /usr/lib/libc.so.6
#1  0x00007f1245b24786 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f1245b2489c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f124b62a06b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f124b5d389a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f124b3f5a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f11852510a7 in KCupsConnection::run() () at /usr/lib/libkcupslib.so
#7  0x00007f124b3fa6d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f124a2c5454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f124ad0f7df in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7f1198258700 (LWP 1060)):
#0  0x00007f124ad024ed in read () at /usr/lib/libc.so.6
#1  0x00007f1245b68a10 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f1245b24235 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007f1245b24724 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007f1245b2489c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007f124b62a06b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f124b5d389a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007f124b3f5a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007f124f0e2fd6 in  () at /usr/lib/libQt5Quick.so.5
#9  0x00007f124b3fa6d8 in  () at /usr/lib/libQt5Core.so.5
#10 0x00007f124a2c5454 in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007f124ad0f7df in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7f12279c2700 (LWP 1024)):
#0  0x00007f124a2cb10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f1250dd7234 in  () at /usr/lib/libQt5Script.so.5
#2  0x00007f1250dd7279 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007f124a2c5454 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f124ad0f7df in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f1231782700 (LWP 1007)):
#0  0x00007f124ad024ed in read () at /usr/lib/libc.so.6
#1  0x00007f1245b68a10 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f1245b24235 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007f1245b24724 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007f1245b2489c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007f124b62a06b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f124b5d389a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007f124b3f5a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007f124e52f025 in  () at /usr/lib/libQt5Qml.so.5
#9  0x00007f124b3fa6d8 in  () at /usr/lib/libQt5Core.so.5
#10 0x00007f124a2c5454 in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007f124ad0f7df in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f12331e2700 (LWP 964)):
#0  0x00007f1245b69db9 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0
#1  0x00007f1245b23b67 in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#2  0x00007f1245b246ab in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007f1245b2489c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007f124b62a06b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f124b5d389a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f124b3f5a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007f124e52f025 in  () at /usr/lib/libQt5Qml.so.5
#8  0x00007f124b3fa6d8 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f124a2c5454 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f124ad0f7df in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f1238cd0700 (LWP 915)):
#0  0x00007f1245b69dd4 in g_mutex_unlock () at /usr/lib/libglib-2.0.so.0
#1  0x00007f1245b24171 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#2  0x00007f1245b24724 in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007f1245b2489c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007f124b62a06b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f124b5d389a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f124b3f5a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007f124ba3f125 in  () at /usr/lib/libQt5DBus.so.5
#8  0x00007f124b3fa6d8 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f124a2c5454 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f124ad0f7df in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f123a92a700 (LWP 902)):
#0  0x00007f124ad0648d in poll () at /usr/lib/libc.so.6
#1  0x00007f124fcfd8e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007f124fcff679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f123c869239 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f124b3fa6d8 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f124a2c5454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f124ad0f7df in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f125162a800 (LWP 891)):
[KCrash Handler]
#6  0x00007f124b59b510 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f124b59b7e9 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f124b5a33c9 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f124b600d49 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#10 0x00007f124b678484 in QAbstractItemModel::rowsRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/libQt5Core.so.5
#11 0x00007f124b57cd6b in QAbstractItemModel::endRemoveRows() () at /usr/lib/libQt5Core.so.5
#12 0x00007f118f10c50b in  () at /usr/lib/libtaskmanager.so.6
#13 0x00007f118f10f759 in  () at /usr/lib/libtaskmanager.so.6
#14 0x00007f124b600d49 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#15 0x00007f124b678414 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/libQt5Core.so.5
#16 0x00007f124b57c613 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/libQt5Core.so.5
#17 0x00007f124b5a0b15 in  () at /usr/lib/libQt5Core.so.5
#18 0x00007f124b5a0d14 in  () at /usr/lib/libQt5Core.so.5
#19 0x00007f124b5a33a8 in  () at /usr/lib/libQt5Core.so.5
#20 0x00007f124b600d49 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#21 0x00007f124b678414 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/libQt5Core.so.5
#22 0x00007f124b57c613 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/libQt5Core.so.5
#23 0x00007f119656c8e2 in  () at /usr/lib/libKF5ItemModels.so.5
#24 0x00007f124b600d49 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#25 0x00007f124b678414 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/libQt5Core.so.5
#26 0x00007f124b57c613 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/libQt5Core.so.5
#27 0x00007f124b5969c0 in  () at /usr/lib/libQt5Core.so.5
#28 0x00007f124b600d49 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#29 0x00007f124b678414 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/libQt5Core.so.5
#30 0x00007f124b57c613 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/libQt5Core.so.5
#31 0x00007f118f129389 in TaskManager::XWindowTasksModel::Private::removeWindow(unsigned long long) () at /usr/lib/libtaskmanager.so.6
#32 0x00007f124b6010be in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#33 0x00007f124e041742 in KWindowSystem::windowRemoved(unsigned long long) () at /usr/lib/libKF5WindowSystem.so.5
#34 0x00007f12380b8eb6 in  () at /usr/lib/qt/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#35 0x00007f124e039d87 in NETRootInfo::update(QFlags<NET::Property>, QFlags<NET::Property2>) () at /usr/lib/libKF5WindowSystem.so.5
#36 0x00007f124e03b40c in NETRootInfo::event(xcb_generic_event_t*, QFlags<NET::Property>*, QFlags<NET::Property2>*) () at /usr/lib/libKF5WindowSystem.so.5
#37 0x00007f124e03b732 in NETRootInfo::event(xcb_generic_event_t*, unsigned long*, int) () at /usr/lib/libKF5WindowSystem.so.5
#38 0x00007f12380b8416 in  () at /usr/lib/qt/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#39 0x00007f124b5d255f in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib/libQt5Core.so.5
#40 0x00007f123c86a974 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib/libQt5XcbQpa.so.5
#41 0x00007f123c86b655 in QXcbConnection::processXcbEvents() () at /usr/lib/libQt5XcbQpa.so.5
#42 0x00007f124b601ba9 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#43 0x00007f124c54334c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#44 0x00007f124c54ab61 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#45 0x00007f124b5d5440 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#46 0x00007f124b5d7bcd in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#47 0x00007f124b629c43 in  () at /usr/lib/libQt5Core.so.5
#48 0x00007f1245b24587 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#49 0x00007f1245b247f0 in  () at /usr/lib/libglib-2.0.so.0
#50 0x00007f1245b2489c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#51 0x00007f124b62a04f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#52 0x00007f124b5d389a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#53 0x00007f124b5dbde4 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#54 0x000000000041ca42 in  ()
#55 0x00007f124ac47291 in __libc_start_main () at /usr/lib/libc.so.6
#56 0x000000000041cdca in _start ()

Reported using DrKonqi