Application: plasmashell (5.8.5)

Qt Version: 5.7.1
Frameworks Version: 5.28.0
Operating System: Linux 4.10.0 x86_64
Distribution: Debian GNU/Linux 9.0 (stretch)

-- Information about the crash:
I have about 1000 tabs open across about 20 windows in firefox. When I quit firefox, the plasmashell crashed and restarted.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f59e62c9c40 (LWP 4418))]

Thread 17 (Thread 0x7f590e7fc700 (LWP 4808)):
#0  0x00007f59f2b0d14f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f59f39f4c6b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f594062ad50 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f594062ef88 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f594062efe2 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f594062efe2 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f594062cd99 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007f59f39f3da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f59f2b07424 in start_thread (arg=0x7f590e7fc700) at pthread_create.c:333
#12 0x00007f59f330d9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 16 (Thread 0x7f590effd700 (LWP 4807)):
#0  0x00007f59f2b0d14f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f59f39f4c6b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f594062ad50 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f594062ef88 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f594062efe2 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f594062cd99 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f59f39f3da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f59f2b07424 in start_thread (arg=0x7f590effd700) at pthread_create.c:333
#10 0x00007f59f330d9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 15 (Thread 0x7f590f7fe700 (LWP 4806)):
#0  0x00007f59f2b0d14f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f59f39f4c6b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f594062ad50 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f594062ef88 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f594062efe2 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f594062cd99 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f59f39f3da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f59f2b07424 in start_thread (arg=0x7f590f7fe700) at pthread_create.c:333
#10 0x00007f59f330d9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 14 (Thread 0x7f590ffff700 (LWP 4805)):
#0  0x00007f59f2b0d14f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f59f39f4c6b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f594062ad50 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f594062ef88 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f594062efe2 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f594062cd99 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f59f39f3da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f59f2b07424 in start_thread (arg=0x7f590ffff700) at pthread_create.c:333
#10 0x00007f59f330d9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 13 (Thread 0x7f591c838700 (LWP 4804)):
#0  0x00007f59f2b0d14f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f59f39f4c6b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f594062ad50 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f594062ef88 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f594062efe2 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f594062efe2 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f594062efe2 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#11 0x00007f594062efe2 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#12 0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#13 0x00007f594062efe2 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#14 0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#15 0x00007f594062efe2 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#16 0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#17 0x00007f594062cd99 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#18 0x00007f59f39f3da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f59f2b07424 in start_thread (arg=0x7f591c838700) at pthread_create.c:333
#20 0x00007f59f330d9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 12 (Thread 0x7f591d039700 (LWP 4803)):
#0  0x00007f59f2b0d14f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f59f39f4c6b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f594062ad50 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f594062ef88 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f594062efe2 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f594062cd99 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f59f39f3da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f59f2b07424 in start_thread (arg=0x7f591d039700) at pthread_create.c:333
#10 0x00007f59f330d9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 11 (Thread 0x7f591d83a700 (LWP 4802)):
#0  0x00007f59f2b0d14f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f59f39f4c6b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f594062ad50 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f594062ef88 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f594062efe2 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f594062efe2 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f594062cd99 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007f59f39f3da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f59f2b07424 in start_thread (arg=0x7f591d83a700) at pthread_create.c:333
#12 0x00007f59f330d9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 10 (Thread 0x7f591fd17700 (LWP 4801)):
#0  0x00007f59f2b0d14f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f59f39f4c6b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f594062ad50 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f594062ef88 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f594062efe2 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f5940629ecd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f594062cd99 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f59f39f3da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f59f2b07424 in start_thread (arg=0x7f591fd17700) at pthread_create.c:333
#10 0x00007f59f330d9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 9 (Thread 0x7f593dc80700 (LWP 4665)):
#0  0x00007f59f330454d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f59eec809f6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7f5930002e70, timeout=<optimized out>, context=0x7f5930000990) at ././glib/gmain.c:4228
#2  0x00007f59eec809f6 in g_main_context_iterate (context=context@entry=0x7f5930000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3924
#3  0x00007f59eec80b0c in g_main_context_iteration (context=0x7f5930000990, may_block=1) at ././glib/gmain.c:3990
#4  0x00007f59f3c1806b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f59f3bc19ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f59f39ef0f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f59f39f3da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f59f2b07424 in start_thread (arg=0x7f593dc80700) at pthread_create.c:333
#9  0x00007f59f330d9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 8 (Thread 0x7f593e481700 (LWP 4664)):
#0  0x00007f59f330454d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f59eec809f6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7f59380013c0, timeout=<optimized out>, context=0x7f5938000990) at ././glib/gmain.c:4228
#2  0x00007f59eec809f6 in g_main_context_iterate (context=context@entry=0x7f5938000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3924
#3  0x00007f59eec80b0c in g_main_context_iteration (context=0x7f5938000990, may_block=1) at ././glib/gmain.c:3990
#4  0x00007f59f3c1806b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f59f3bc19ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f59f39ef0f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f593e8d1a35 in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/XmlListModel/libqmlxmllistmodelplugin.so
#8  0x00007f59f39f3da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f59f2b07424 in start_thread (arg=0x7f593e481700) at pthread_create.c:333
#10 0x00007f59f330d9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 7 (Thread 0x7f59473ca700 (LWP 4618)):
#0  0x00007f59f2b0d14f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f594b63d59b in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#2  0x00007f594b63d3f7 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#3  0x00007f59f2b07424 in start_thread (arg=0x7f59473ca700) at pthread_create.c:333
#4  0x00007f59f330d9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 6 (Thread 0x7f59d13f4700 (LWP 4615)):
#0  0x00007f59f2b0d14f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f59f84742c4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f59f8474309 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f59f2b07424 in start_thread (arg=0x7f59d13f4700) at pthread_create.c:333
#4  0x00007f59f330d9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 5 (Thread 0x7f59d31b8700 (LWP 4614)):
#0  0x00007f59f330454d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f59eec809f6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7f59cc003070, timeout=<optimized out>, context=0x7f59cc000990) at ././glib/gmain.c:4228
#2  0x00007f59eec809f6 in g_main_context_iterate (context=context@entry=0x7f59cc000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3924
#3  0x00007f59eec80b0c in g_main_context_iteration (context=0x7f59cc000990, may_block=1) at ././glib/gmain.c:3990
#4  0x00007f59f3c1806b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f59f3bc19ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f59f39ef0f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f59f62816a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f59f39f3da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f59f2b07424 in start_thread (arg=0x7f59d31b8700) at pthread_create.c:333
#10 0x00007f59f330d9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 4 (Thread 0x7f59e09fb700 (LWP 4518)):
#0  0x00007f59f33005bd in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f59eecc4d20 in read (__nbytes=16, __buf=0x7f59e09fabc0, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x00007f59eecc4d20 in g_wakeup_acknowledge (wakeup=0x55c3fd566aa0) at ././glib/gwakeup.c:210
#3  0x00007f59eec804be in g_main_context_check (context=context@entry=0x7f59d8000990, max_priority=2147483647, fds=fds@entry=0x7f59d8002e70, n_fds=n_fds@entry=1) at ././glib/gmain.c:3707
#4  0x00007f59eec80994 in g_main_context_iterate (context=context@entry=0x7f59d8000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3926
#5  0x00007f59eec80b0c in g_main_context_iteration (context=0x7f59d8000990, may_block=1) at ././glib/gmain.c:3990
#6  0x00007f59f3c1806b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f59f3bc19ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f59f39ef0f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f59f62816a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007f59f39f3da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f59f2b07424 in start_thread (arg=0x7f59e09fb700) at pthread_create.c:333
#12 0x00007f59f330d9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 3 (Thread 0x7f59e31b1700 (LWP 4446)):
#0  0x00007f59f33005bd in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f59eecc4d20 in read (__nbytes=16, __buf=0x7f59e31b0bb0, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x00007f59eecc4d20 in g_wakeup_acknowledge (wakeup=0x7f59dc0015c0) at ././glib/gwakeup.c:210
#3  0x00007f59eec804be in g_main_context_check (context=context@entry=0x7f59d4000990, max_priority=2147483647, fds=fds@entry=0x7f59d4011b60, n_fds=n_fds@entry=1) at ././glib/gmain.c:3707
#4  0x00007f59eec80994 in g_main_context_iterate (context=context@entry=0x7f59d4000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3926
#5  0x00007f59eec80b0c in g_main_context_iteration (context=0x7f59d4000990, may_block=1) at ././glib/gmain.c:3990
#6  0x00007f59f3c1806b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f59f3bc19ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f59f39ef0f3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f59f8b386d5 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#10 0x00007f59f39f3da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f59f2b07424 in start_thread (arg=0x7f59e31b1700) at pthread_create.c:333
#12 0x00007f59f330d9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 2 (Thread 0x7f59e4519700 (LWP 4444)):
#0  0x00007f59f330454d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f59f73cb150 in poll (__timeout=-1, __nfds=1, __fds=0x7f59e4518d00) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  0x00007f59f73cb150 in _xcb_conn_wait (c=c@entry=0x55c3fd568370, cond=cond@entry=0x55c3fd5683b0, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:479
#3  0x00007f59f73ccee9 in xcb_wait_for_event (c=0x55c3fd568370) at ../../src/xcb_in.c:693
#4  0x00007f59e603ab69 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#5  0x00007f59f39f3da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f59f2b07424 in start_thread (arg=0x7f59e4519700) at pthread_create.c:333
#7  0x00007f59f330d9bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 1 (Thread 0x7f59e62c9c40 (LWP 4418)):
[KCrash Handler]
#6  0x00007f59f3b89dd0 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f59f3b8a0b9 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f59f3b920a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f59f3bef5e9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f59f3c66924 in QAbstractItemModel::rowsRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f59f3b6b12b in QAbstractItemModel::endRemoveRows() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f593ff11508 in  () at /usr/lib/x86_64-linux-gnu/libtaskmanager.so.6
#13 0x00007f593ff14599 in  () at /usr/lib/x86_64-linux-gnu/libtaskmanager.so.6
#14 0x00007f59f3bef5e9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007f59f3c668b4 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007f59f3b6a9d3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f59f3b8f7f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007f59f3b8f9f4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f59f3b92088 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007f59f3bef5e9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007f59f3c668b4 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007f59f3b6a9d3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f59419f6265 in  () at /usr/lib/x86_64-linux-gnu/libKF5ItemModels.so.5
#24 0x00007f59419f7711 in  () at /usr/lib/x86_64-linux-gnu/libKF5ItemModels.so.5
#25 0x00007f59f3bef5e9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f59f3c668b4 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007f59f3b6a9d3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007f59f3b84fd0 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007f59f3bef5e9 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007f59f3c668b4 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007f59f3b6a9d3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007f593ff2b2f3 in TaskManager::XWindowTasksModel::Private::removeWindow(unsigned long long) () at /usr/lib/x86_64-linux-gnu/libtaskmanager.so.6
#33 0x00007f59f3bef95e in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00007f59f5da42e2 in KWindowSystem::windowRemoved(unsigned long long) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#35 0x00007f59e0e1aa66 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#36 0x00007f59f5d9c632 in NETRootInfo::update(QFlags<NET::Property>, QFlags<NET::Property2>) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#37 0x00007f59f5d9d65c in NETRootInfo::event(xcb_generic_event_t*, QFlags<NET::Property>*, QFlags<NET::Property2>*) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#38 0x00007f59f5d9d982 in NETRootInfo::event(xcb_generic_event_t*, unsigned long*, int) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#39 0x00007f59e0e1a196 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#40 0x00007f59f3bc0b0f in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#41 0x00007f59e603c334 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#42 0x00007f59e603d015 in QXcbConnection::processXcbEvents() () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#43 0x00007f59f3bf0499 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#44 0x00007f59f44a6b8c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#45 0x00007f59f44ae341 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#46 0x00007f59f3bc39e0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#47 0x00007f59f3bc616d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#48 0x00007f59f3c17c43 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#49 0x00007f59eec807f7 in g_main_dispatch (context=0x7f59dc0016f0) at ././glib/gmain.c:3203
#50 0x00007f59eec807f7 in g_main_context_dispatch (context=context@entry=0x7f59dc0016f0) at ././glib/gmain.c:3856
#51 0x00007f59eec80a60 in g_main_context_iterate (context=context@entry=0x7f59dc0016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3929
#52 0x00007f59eec80b0c in g_main_context_iteration (context=0x7f59dc0016f0, may_block=1) at ././glib/gmain.c:3990
#53 0x00007f59f3c1804f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#54 0x00007f59f3bc19ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#55 0x00007f59f3bca13c in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#56 0x000055c3fc346db2 in  ()
#57 0x00007f59f32452b1 in __libc_start_main (main=0x55c3fc346250, argc=2, argv=0x7ffd74dea788, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd74dea778) at ../csu/libc-start.c:291
#58 0x000055c3fc34713a in _start ()

Reported using DrKonqi