Application: plasmashell (5.8.7)

Qt Version: 5.6.2
Frameworks Version: 5.32.0
Operating System: Linux 4.4.79-19-default x86_64
Distribution: "openSUSE Leap 42.3"

-- Information about the crash:
- What I was doing when the application crashed:
plasma always crash after close firefox if it is using more that 3 GB or 75% in my case of system memory

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7ffaf308c900 (LWP 2959))]

Thread 15 (Thread 0x7ffa0d567700 (LWP 5216)):
#0  0x00007ffaebd810bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007ffaecc6e69b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x800a480) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x5097fa0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007ffa330a342f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#4  0x00007ffa330a6dea in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#5  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#6  0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#7  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#8  0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#9  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#10 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#11 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#12 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#13 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#14 0x00007ffa330a4a46 in ThreadWeaver::Thread::run() () from /usr/lib64/libKF5ThreadWeaver.so.5
#15 0x00007ffaecc6da29 in QThreadPrivate::start (arg=0x7ff9ec003a70) at thread/qthread_unix.cpp:365
#16 0x00007ffaebd7c744 in start_thread () from /lib64/libpthread.so.0
#17 0x00007ffaec57baad in clone () from /lib64/libc.so.6

Thread 14 (Thread 0x7ffa0dd68700 (LWP 5215)):
#0  0x00007ffaebd810bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007ffaecc6e69b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x800a480) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x5097fa0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007ffa330a342f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#4  0x00007ffa330a6dea in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#5  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#6  0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#7  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#8  0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#9  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#10 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#11 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#12 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#13 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#14 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#15 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#16 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#17 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#18 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#19 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#20 0x00007ffa330a4a46 in ThreadWeaver::Thread::run() () from /usr/lib64/libKF5ThreadWeaver.so.5
#21 0x00007ffaecc6da29 in QThreadPrivate::start (arg=0x232d5f0) at thread/qthread_unix.cpp:365
#22 0x00007ffaebd7c744 in start_thread () from /lib64/libpthread.so.0
#23 0x00007ffaec57baad in clone () from /lib64/libc.so.6

Thread 13 (Thread 0x7ffa0e569700 (LWP 5214)):
#0  0x00007ffaebd810bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007ffaecc6e69b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x800a480) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x5097fa0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007ffa330a342f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#4  0x00007ffa330a6dea in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#5  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#6  0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#7  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#8  0x00007ffa330a4a46 in ThreadWeaver::Thread::run() () from /usr/lib64/libKF5ThreadWeaver.so.5
#9  0x00007ffaecc6da29 in QThreadPrivate::start (arg=0x7ff9ec003be0) at thread/qthread_unix.cpp:365
#10 0x00007ffaebd7c744 in start_thread () from /lib64/libpthread.so.0
#11 0x00007ffaec57baad in clone () from /lib64/libc.so.6

Thread 12 (Thread 0x7ffa0ed6a700 (LWP 5213)):
#0  0x00007ffaebd810bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007ffaecc6e69b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x800a480) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x5097fa0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007ffa330a342f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#4  0x00007ffa330a6dea in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#5  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#6  0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#7  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#8  0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#9  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#10 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#11 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#12 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#13 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#14 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#15 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#16 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#17 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#18 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#19 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#20 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#21 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#22 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#23 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#24 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#25 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#26 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#27 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#28 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#29 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#30 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#31 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#32 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#33 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#34 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#35 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#36 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#37 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#38 0x00007ffa330a4a46 in ThreadWeaver::Thread::run() () from /usr/lib64/libKF5ThreadWeaver.so.5
#39 0x00007ffaecc6da29 in QThreadPrivate::start (arg=0x7ff9d00019b0) at thread/qthread_unix.cpp:365
#40 0x00007ffaebd7c744 in start_thread () from /lib64/libpthread.so.0
#41 0x00007ffaec57baad in clone () from /lib64/libc.so.6

Thread 11 (Thread 0x7ffa061aa700 (LWP 5212)):
#0  0x00007ffaebd810bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007ffaecc6e69b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x800a480) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x5097fa0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007ffa330a342f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#4  0x00007ffa330a6dea in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#5  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#6  0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#7  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#8  0x00007ffa330a4a46 in ThreadWeaver::Thread::run() () from /usr/lib64/libKF5ThreadWeaver.so.5
#9  0x00007ffaecc6da29 in QThreadPrivate::start (arg=0x555eae0) at thread/qthread_unix.cpp:365
#10 0x00007ffaebd7c744 in start_thread () from /lib64/libpthread.so.0
#11 0x00007ffaec57baad in clone () from /lib64/libc.so.6

Thread 10 (Thread 0x7ffa07bba700 (LWP 5211)):
#0  0x00007ffaebd810bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007ffaecc6e69b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x800a480) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x5097fa0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007ffa330a342f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#4  0x00007ffa330a6dea in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#5  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#6  0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#7  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#8  0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#9  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#10 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#11 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#12 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#13 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#14 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#15 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#16 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#17 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#18 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#19 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#20 0x00007ffa330a4a46 in ThreadWeaver::Thread::run() () from /usr/lib64/libKF5ThreadWeaver.so.5
#21 0x00007ffaecc6da29 in QThreadPrivate::start (arg=0x7ff9f00ad540) at thread/qthread_unix.cpp:365
#22 0x00007ffaebd7c744 in start_thread () from /lib64/libpthread.so.0
#23 0x00007ffaec57baad in clone () from /lib64/libc.so.6

Thread 9 (Thread 0x7ffa073b9700 (LWP 5210)):
#0  0x00007ffaebd810bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007ffaecc6e69b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x800a480) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x5097fa0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007ffa330a342f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#4  0x00007ffa330a6dea in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#5  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#6  0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#7  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#8  0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#9  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#10 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#11 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#12 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#13 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#14 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#15 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#16 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#17 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#18 0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#19 0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#20 0x00007ffa330a4a46 in ThreadWeaver::Thread::run() () from /usr/lib64/libKF5ThreadWeaver.so.5
#21 0x00007ffaecc6da29 in QThreadPrivate::start (arg=0x2dfbcd0) at thread/qthread_unix.cpp:365
#22 0x00007ffaebd7c744 in start_thread () from /lib64/libpthread.so.0
#23 0x00007ffaec57baad in clone () from /lib64/libc.so.6

Thread 8 (Thread 0x7ffa09415700 (LWP 5209)):
#0  0x00007ffaebd810bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007ffaecc6e69b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x800a480) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x5097fa0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007ffa330a342f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#4  0x00007ffa330a6dea in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#5  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#6  0x00007ffa330a6e32 in ?? () from /usr/lib64/libKF5ThreadWeaver.so.5
#7  0x00007ffa330a145b in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib64/libKF5ThreadWeaver.so.5
#8  0x00007ffa330a4a46 in ThreadWeaver::Thread::run() () from /usr/lib64/libKF5ThreadWeaver.so.5
#9  0x00007ffaecc6da29 in QThreadPrivate::start (arg=0x644da90) at thread/qthread_unix.cpp:365
#10 0x00007ffaebd7c744 in start_thread () from /lib64/libpthread.so.0
#11 0x00007ffaec57baad in clone () from /lib64/libc.so.6

Thread 7 (Thread 0x7ffa2e7a0700 (LWP 3144)):
#0  0x00007ffae8c23e1b in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#1  0x00007ffae8c242a8 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007ffae8c2442c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007ffaece801ab in QEventDispatcherGlib::processEvents (this=0x7ffa280008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#4  0x00007ffaece2dbfb in QEventLoop::exec (this=this@entry=0x7ffa2e79fc90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:206
#5  0x00007ffaecc68f5a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:500
#6  0x00007ffa2fbc98f7 in KCupsConnection::run() () from /usr/lib64/libkcupslib.so
#7  0x00007ffaecc6da29 in QThreadPrivate::start (arg=0x57b10c0) at thread/qthread_unix.cpp:365
#8  0x00007ffaebd7c744 in start_thread () from /lib64/libpthread.so.0
#9  0x00007ffaec57baad in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7ffa3a133700 (LWP 3131)):
#0  0x00007ffae8c65899 in g_mutex_lock () from /usr/lib64/libglib-2.0.so.0
#1  0x00007ffae8c24418 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#2  0x00007ffaece801ab in QEventDispatcherGlib::processEvents (this=0x7ffa340008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#3  0x00007ffaece2dbfb in QEventLoop::exec (this=this@entry=0x7ffa3a132c70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:206
#4  0x00007ffaecc68f5a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:500
#5  0x00007ffaf0afa822 in ?? () from /usr/lib64/libQt5Quick.so.5
#6  0x00007ffaecc6da29 in QThreadPrivate::start (arg=0x2e39ba0) at thread/qthread_unix.cpp:365
#7  0x00007ffaebd7c744 in start_thread () from /lib64/libpthread.so.0
#8  0x00007ffaec57baad in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7ffacd5e7700 (LWP 3126)):
#0  0x00007ffaebd810bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007ffaf275f93b in ?? () from /usr/lib64/libQt5Script.so.5
#2  0x00007ffaf275f969 in ?? () from /usr/lib64/libQt5Script.so.5
#3  0x00007ffaebd7c744 in start_thread () from /lib64/libpthread.so.0
#4  0x00007ffaec57baad in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7ffacf3be700 (LWP 3104)):
#0  0x00007ffaec57320d in poll () from /lib64/libc.so.6
#1  0x00007ffae8c24314 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007ffae8c2442c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007ffaece801ab in QEventDispatcherGlib::processEvents (this=0x7ffac40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#4  0x00007ffaece2dbfb in QEventLoop::exec (this=this@entry=0x7ffacf3bdcb0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:206
#5  0x00007ffaecc68f5a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:500
#6  0x00007ffaeff763d8 in ?? () from /usr/lib64/libQt5Qml.so.5
#7  0x00007ffaecc6da29 in QThreadPrivate::start (arg=0x24e9cb0) at thread/qthread_unix.cpp:365
#8  0x00007ffaebd7c744 in start_thread () from /lib64/libpthread.so.0
#9  0x00007ffaec57baad in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7ffad4d86700 (LWP 3044)):
#0  0x00007ffae8c65899 in g_mutex_lock () from /usr/lib64/libglib-2.0.so.0
#1  0x00007ffae8c23dac in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#2  0x00007ffae8c242a8 in ?? () from /usr/lib64/libglib-2.0.so.0
#3  0x00007ffae8c2442c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#4  0x00007ffaece801ab in QEventDispatcherGlib::processEvents (this=0x7ffac80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#5  0x00007ffaece2dbfb in QEventLoop::exec (this=this@entry=0x7ffad4d85cb0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:206
#6  0x00007ffaecc68f5a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:500
#7  0x00007ffaeff763d8 in ?? () from /usr/lib64/libQt5Qml.so.5
#8  0x00007ffaecc6da29 in QThreadPrivate::start (arg=0x24002a0) at thread/qthread_unix.cpp:365
#9  0x00007ffaebd7c744 in start_thread () from /lib64/libpthread.so.0
#10 0x00007ffaec57baad in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7ffae01cb700 (LWP 2966)):
#0  0x00007ffaec56f28d in read () from /lib64/libc.so.6
#1  0x00007ffae8c64750 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007ffae8c23e49 in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#3  0x00007ffae8c242a8 in ?? () from /usr/lib64/libglib-2.0.so.0
#4  0x00007ffae8c2442c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#5  0x00007ffaece801ab in QEventDispatcherGlib::processEvents (this=0x7ffad80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#6  0x00007ffaece2dbfb in QEventLoop::exec (this=this@entry=0x7ffae01caca0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:206
#7  0x00007ffaecc68f5a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:500
#8  0x00007ffaed294295 in ?? () from /usr/lib64/libQt5DBus.so.5
#9  0x00007ffaecc6da29 in QThreadPrivate::start (arg=0x7ffaed4fdce0) at thread/qthread_unix.cpp:365
#10 0x00007ffaebd7c744 in start_thread () from /lib64/libpthread.so.0
#11 0x00007ffaec57baad in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7ffaf308c900 (LWP 2959)):
[KCrash Handler]
#6  QSortFilterProxyModelPrivate::updateChildrenMapping (this=this@entry=0x4e75cc0, source_parent=..., parent_mapping=parent_mapping@entry=0x5005ad0, start=start@entry=0, end=end@entry=0, delta_item_count=delta_item_count@entry=1, remove=remove@entry=true, orient=Qt::Vertical) at itemmodels/qsortfilterproxymodel.cpp:969
#7  0x00007ffaecdfb0af in QSortFilterProxyModelPrivate::source_items_removed (orient=Qt::Vertical, end=<optimized out>, start=0, source_parent=..., this=0x4e75cc0) at itemmodels/qsortfilterproxymodel.cpp:911
#8  QSortFilterProxyModelPrivate::_q_sourceRowsRemoved (this=0x4e75cc0, source_parent=..., start=0, end=<optimized out>) at itemmodels/qsortfilterproxymodel.cpp:1418
#9  0x00007ffaece01f19 in QSortFilterProxyModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qsortfilterproxymodel.cpp:211
#10 0x00007ffaece597d1 in QMetaObject::activate (sender=sender@entry=0x4e902d0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=12, argv=argv@entry=0x7fff30b16570) at kernel/qobject.cpp:3730
#11 0x00007ffaece5a3d7 in QMetaObject::activate (sender=sender@entry=0x4e902d0, m=m@entry=0x7ffaed275ca0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=12, argv=argv@entry=0x7fff30b16570) at kernel/qobject.cpp:3595
#12 0x00007ffaeced0334 in QAbstractItemModel::rowsRemoved (this=this@entry=0x4e902d0, _t1=..., _t2=0, _t3=0) at .moc/moc_qabstractitemmodel.cpp:615
#13 0x00007ffaecdde751 in QAbstractItemModel::endRemoveRows (this=0x4e902d0) at itemmodels/qabstractitemmodel.cpp:2678
#14 0x00007ffa3254055f in TaskManager::TaskGroupingProxyModel::Private::sourceRowsAboutToBeRemoved (this=0x4e76440, parent=..., first=<optimized out>, last=3) at /usr/src/debug/plasma-workspace-5.8.7/libtaskmanager/taskgroupingproxymodel.cpp:197
#15 0x00007ffa32543119 in TaskManager::TaskGroupingProxyModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /usr/src/debug/plasma-workspace-5.8.7/build/libtaskmanager/moc_taskgroupingproxymodel.cpp:152
#16 0x00007ffaece597d1 in QMetaObject::activate (sender=sender@entry=0x4e90240, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7fff30b168a0) at kernel/qobject.cpp:3730
#17 0x00007ffaece5a3d7 in QMetaObject::activate (sender=sender@entry=0x4e90240, m=m@entry=0x7ffaed275ca0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7fff30b168a0) at kernel/qobject.cpp:3595
#18 0x00007ffaeced02e4 in QAbstractItemModel::rowsAboutToBeRemoved (this=this@entry=0x4e90240, _t1=..., _t2=_t2@entry=3, _t3=_t3@entry=3) at .moc/moc_qabstractitemmodel.cpp:608
#19 0x00007ffaecddded4 in QAbstractItemModel::beginRemoveRows (this=0x4e90240, parent=..., first=3, last=3) at itemmodels/qabstractitemmodel.cpp:2661
#20 0x00007ffaecdfca0d in QSortFilterProxyModelPrivate::remove_proxy_interval (emit_signal=true, orient=Qt::Vertical, proxy_parent=..., proxy_end=3, proxy_start=3, proxy_to_source=..., source_to_proxy=..., this=0x4e7a320) at itemmodels/qsortfilterproxymodel.cpp:577
#21 QSortFilterProxyModelPrivate::remove_source_items (this=this@entry=0x4e7a320, source_to_proxy=..., proxy_to_source=..., source_items=..., source_parent=..., orient=orient@entry=Qt::Vertical, emit_signal=emit_signal@entry=true) at itemmodels/qsortfilterproxymodel.cpp:559
#22 0x00007ffaecdfcbbd in QSortFilterProxyModelPrivate::source_items_about_to_be_removed (this=0x4e7a320, source_parent=..., start=3, end=3, orient=orient@entry=Qt::Vertical) at itemmodels/qsortfilterproxymodel.cpp:860
#23 0x00007ffaece01ef8 in QSortFilterProxyModelPrivate::_q_sourceRowsAboutToBeRemoved (end=<optimized out>, start=<optimized out>, source_parent=..., this=<optimized out>) at itemmodels/qsortfilterproxymodel.cpp:1411
#24 QSortFilterProxyModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qsortfilterproxymodel.cpp:210
#25 0x00007ffaece597d1 in QMetaObject::activate (sender=sender@entry=0x4e793d0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7fff30b16bf0) at kernel/qobject.cpp:3730
#26 0x00007ffaece5a3d7 in QMetaObject::activate (sender=sender@entry=0x4e793d0, m=m@entry=0x7ffaed275ca0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7fff30b16bf0) at kernel/qobject.cpp:3595
#27 0x00007ffaeced02e4 in QAbstractItemModel::rowsAboutToBeRemoved (this=this@entry=0x4e793d0, _t1=..., _t2=_t2@entry=3, _t3=_t3@entry=3) at .moc/moc_qabstractitemmodel.cpp:608
#28 0x00007ffaecddded4 in QAbstractItemModel::beginRemoveRows (this=0x4e793d0, parent=..., first=3, last=3) at itemmodels/qabstractitemmodel.cpp:2661
#29 0x00007ffa384c7ed5 in KConcatenateRowsProxyModelPrivate::slotRowsAboutToBeRemoved (this=0x4e764f0, start=3, end=3) at /usr/src/debug/kitemmodels-5.32.0/src/kconcatenaterowsproxymodel.cpp:241
#30 0x00007ffa384c8d21 in KConcatenateRowsProxyModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /usr/src/debug/kitemmodels-5.32.0/build/src/moc_kconcatenaterowsproxymodel.cpp:144
#31 0x00007ffaece597d1 in QMetaObject::activate (sender=sender@entry=0x4e75690, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7fff30b16e70) at kernel/qobject.cpp:3730
#32 0x00007ffaece5a3d7 in QMetaObject::activate (sender=sender@entry=0x4e75690, m=m@entry=0x7ffaed275ca0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7fff30b16e70) at kernel/qobject.cpp:3595
#33 0x00007ffaeced02e4 in QAbstractItemModel::rowsAboutToBeRemoved (this=this@entry=0x4e75690, _t1=..., _t2=_t2@entry=3, _t3=_t3@entry=3) at .moc/moc_qabstractitemmodel.cpp:608
#34 0x00007ffaecddded4 in QAbstractItemModel::beginRemoveRows (this=this@entry=0x4e75690, parent=..., first=first@entry=3, last=last@entry=3) at itemmodels/qabstractitemmodel.cpp:2661
#35 0x00007ffaecdf5ecf in QIdentityProxyModelPrivate::_q_sourceRowsAboutToBeRemoved (end=3, start=3, parent=..., this=<optimized out>) at itemmodels/qidentityproxymodel.cpp:573
#36 QIdentityProxyModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qidentityproxymodel.cpp:150
#37 0x00007ffaece597d1 in QMetaObject::activate (sender=sender@entry=0x4d39080, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7fff30b170e0) at kernel/qobject.cpp:3730
#38 0x00007ffaece5a3d7 in QMetaObject::activate (sender=sender@entry=0x4d39080, m=m@entry=0x7ffaed275ca0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7fff30b170e0) at kernel/qobject.cpp:3595
#39 0x00007ffaeced02e4 in QAbstractItemModel::rowsAboutToBeRemoved (this=this@entry=0x4d39080, _t1=..., _t2=_t2@entry=3, _t3=_t3@entry=3) at .moc/moc_qabstractitemmodel.cpp:608
#40 0x00007ffaecddded4 in QAbstractItemModel::beginRemoveRows (this=0x4d39080, parent=..., first=first@entry=3, last=last@entry=3) at itemmodels/qabstractitemmodel.cpp:2661
#41 0x00007ffa3255a7d5 in TaskManager::XWindowTasksModel::Private::removeWindow (this=0x2ba74a0, window=77594654) at /usr/src/debug/plasma-workspace-5.8.7/libtaskmanager/xwindowtasksmodel.cpp:250
#42 0x00007ffaece59de3 in QtPrivate::QSlotObjectBase::call (a=0x7fff30b17340, r=0x4d39080, this=0x4d38af0) at ../../src/corelib/kernel/qobject_impl.h:124
#43 QMetaObject::activate (sender=sender@entry=0x7ffaefca3c00 <(anonymous namespace)::Q_QGS_g_kwmInstanceContainer::innerFunction()::holder>, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7fff30b17340) at kernel/qobject.cpp:3715
#44 0x00007ffaece5a3d7 in QMetaObject::activate (sender=sender@entry=0x7ffaefca3c00 <(anonymous namespace)::Q_QGS_g_kwmInstanceContainer::innerFunction()::holder>, m=m@entry=0x7ffaefca2b60 <KWindowSystem::staticMetaObject>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7fff30b17340) at kernel/qobject.cpp:3595
#45 0x00007ffaefa94ea2 in KWindowSystem::windowRemoved (this=this@entry=0x7ffaefca3c00 <(anonymous namespace)::Q_QGS_g_kwmInstanceContainer::innerFunction()::holder>, _t1=_t1@entry=77594654) at /usr/src/debug/kwindowsystem-5.32.0/build/src/moc_kwindowsystem.cpp:311
#46 0x00007ffad51a8185 in NETEventFilter::removeClient (this=0x2a1fd40, w=77594654) at /usr/src/debug/kwindowsystem-5.32.0/src/platforms/xcb/kwindowsystem.cpp:382
#47 0x00007ffaefa8d771 in NETRootInfo::update (this=0x2a1fd40, properties=..., properties@entry=..., properties2=..., properties2@entry=...) at /usr/src/debug/kwindowsystem-5.32.0/src/platforms/xcb/netwm.cpp:2046
#48 0x00007ffaefa8e642 in NETRootInfo::event (this=this@entry=0x2a1fd40, event=event@entry=0x7ffad0016320, properties=properties@entry=0x7fff30b178e0, properties2=properties2@entry=0x7fff30b178f0) at /usr/src/debug/kwindowsystem-5.32.0/src/platforms/xcb/netwm.cpp:1887
#49 0x00007ffaefa8e872 in NETRootInfo::event (this=this@entry=0x2a1fd40, ev=ev@entry=0x7ffad0016320, properties=properties@entry=0x7fff30b179a0, properties_size=properties_size@entry=5) at /usr/src/debug/kwindowsystem-5.32.0/src/platforms/xcb/netwm.cpp:1672
#50 0x00007ffad51a7b56 in NETEventFilter::nativeEventFilter (this=0x2a1fd40, ev=0x7ffad0016320) at /usr/src/debug/kwindowsystem-5.32.0/src/platforms/xcb/kwindowsystem.cpp:237
#51 0x00007ffaece2ce90 in QAbstractEventDispatcher::filterNativeEvent (this=<optimized out>, eventType=..., message=message@entry=0x7ffad0016320, result=result@entry=0x7fff30b17a68) at kernel/qabstracteventdispatcher.cpp:460
#52 0x00007ffaddea9434 in QXcbConnection::handleXcbEvent (this=this@entry=0x2300f20, event=event@entry=0x7ffad0016320) at qxcbconnection.cpp:1094
#53 0x00007ffaddeab4db in QXcbConnection::processXcbEvents (this=0x2300f20) at qxcbconnection.cpp:1731
#54 0x00007ffaece5ae26 in QObject::event (this=0x2300f20, e=<optimized out>) at kernel/qobject.cpp:1256
#55 0x00007ffaeddb228c in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x2300f20, e=0x7ffad007da00) at kernel/qapplication.cpp:3804
#56 0x00007ffaeddb68ea in QApplication::notify (this=0x7fff30b18270, receiver=0x2300f20, e=0x7ffad007da00) at kernel/qapplication.cpp:3561
#57 0x00007ffaece2fbe5 in QCoreApplication::notifyInternal2 (receiver=0x2300f20, event=event@entry=0x7ffad007da00) at kernel/qcoreapplication.cpp:1015
#58 0x00007ffaece319ca in QCoreApplication::sendEvent (event=0x7ffad007da00, receiver=<optimized out>) at kernel/qcoreapplication.h:225
#59 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x22e5c00) at kernel/qcoreapplication.cpp:1650
#60 0x00007ffaece31f78 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1508
#61 0x00007ffaece80b03 in postEventSourceDispatch (s=0x233e650) at kernel/qeventdispatcher_glib.cpp:270
#62 0x00007ffae8c24134 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#63 0x00007ffae8c24388 in ?? () from /usr/lib64/libglib-2.0.so.0
#64 0x00007ffae8c2442c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#65 0x00007ffaece8018c in QEventDispatcherGlib::processEvents (this=0x233e630, flags=...) at kernel/qeventdispatcher_glib.cpp:417
#66 0x00007ffaece2dbfb in QEventLoop::exec (this=this@entry=0x7fff30b180f0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:206
#67 0x00007ffaece35ae6 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1285
#68 0x00007ffaed5f48ec in QGuiApplication::exec () at kernel/qguiapplication.cpp:1607
#69 0x00007ffaeddaf495 in QApplication::exec () at kernel/qapplication.cpp:2979
#70 0x000000000041f0ff in main (argc=2, argv=<optimized out>) at /usr/src/debug/plasma-workspace-5.8.7/shell/main.cpp:166

Possible duplicates by query: bug 383647, bug 381974, bug 381006, bug 380918, bug 380242.

Reported using DrKonqi