Application: plasmashell (5.5.5)

Qt Version: 5.5.1
Operating System: Linux 4.4.0-34-generic x86_64
Distribution: Ubuntu 16.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:

I was deleting a directory at my desktop. 

- Unusual behavior I noticed:

Then it get extremely slower. After a while, system crashed. It sometimes happen. 

Also It's so hard to delete a file or a directory in my desktop or wherever. System get slow and sometimes I can't delete it.

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 0x7fdf4d0de8c0 (LWP 3799))]

Thread 25 (Thread 0x7fde33fff700 (LWP 15321)):
#0  0x00007fdf46f563a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x5493f90) at thread/qwaitcondition_unix.cpp:136
#2  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x4d591b0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fde9104c2bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007fde910504e8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#11 0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#12 0x00007fde9104e353 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#13 0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x7fde440025d0) at thread/qthread_unix.cpp:331
#14 0x00007fdf46f506fa in start_thread (arg=0x7fde33fff700) at pthread_create.c:333
#15 0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 24 (Thread 0x7fde4cff9700 (LWP 15320)):
#0  0x00007fdf46f563a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x5493f90) at thread/qwaitcondition_unix.cpp:136
#2  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x4d591b0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fde9104c2bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007fde910504e8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007fde9104e353 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x7fde60002d90) at thread/qthread_unix.cpp:331
#10 0x00007fdf46f506fa in start_thread (arg=0x7fde4cff9700) at pthread_create.c:333
#11 0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 23 (Thread 0x7fde4d7fa700 (LWP 15319)):
#0  0x00007fdf46f563a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x5493f90) at thread/qwaitcondition_unix.cpp:136
#2  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x4d591b0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fde9104c2bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007fde910504e8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007fde9104e353 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x7fde58003590) at thread/qthread_unix.cpp:331
#10 0x00007fdf46f506fa in start_thread (arg=0x7fde4d7fa700) at pthread_create.c:333
#11 0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 22 (Thread 0x7fde4dffb700 (LWP 15318)):
#0  0x00007fdf46f563a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x5493f90) at thread/qwaitcondition_unix.cpp:136
#2  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x4d591b0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fde9104c2bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007fde910504e8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007fde9104e353 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#11 0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x7fde48002f90) at thread/qthread_unix.cpp:331
#12 0x00007fdf46f506fa in start_thread (arg=0x7fde4dffb700) at pthread_create.c:333
#13 0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 21 (Thread 0x7fde4e7fc700 (LWP 15317)):
#0  0x00007fdf46f563a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x5493f90) at thread/qwaitcondition_unix.cpp:136
#2  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x4d591b0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fde9104c2bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007fde910504e8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#11 0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#12 0x00007fde9104e353 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#13 0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x7fde58002f90) at thread/qthread_unix.cpp:331
#14 0x00007fdf46f506fa in start_thread (arg=0x7fde4e7fc700) at pthread_create.c:333
#15 0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 20 (Thread 0x7fde4effd700 (LWP 15316)):
#0  0x00007fdf46f563a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x5493f90) at thread/qwaitcondition_unix.cpp:136
#2  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x4d591b0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fde9104c2bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007fde910504e8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#11 0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#12 0x00007fde9104e353 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#13 0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x7fde50003190) at thread/qthread_unix.cpp:331
#14 0x00007fdf46f506fa in start_thread (arg=0x7fde4effd700) at pthread_create.c:333
#15 0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 19 (Thread 0x7fde4f7fe700 (LWP 15315)):
#0  0x00007fdf46f563a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x5493f90) at thread/qwaitcondition_unix.cpp:136
#2  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x4d591b0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fde9104c2bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007fde910504e8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#11 0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#12 0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#13 0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#14 0x00007fde9104e353 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#15 0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x7fde74003510) at thread/qthread_unix.cpp:331
#16 0x00007fdf46f506fa in start_thread (arg=0x7fde4f7fe700) at pthread_create.c:333
#17 0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 18 (Thread 0x7fde4ffff700 (LWP 15314)):
[KCrash Handler]
#6  0x00007fde6776cb0a in  () at /usr/lib/x86_64-linux-gnu/liblmdb.so.0
#7  0x00007fde6776df14 in mdb_txn_begin () at /usr/lib/x86_64-linux-gnu/liblmdb.so.0
#8  0x00007fde67df1bbe in  () at /usr/lib/x86_64-linux-gnu/libKF5Baloo.so.5
#9  0x00007fde67de0bc2 in Baloo::Query::exec() () at /usr/lib/x86_64-linux-gnu/libKF5Baloo.so.5
#10 0x00007fde6c0b4f2f in SearchRunner::match(Plasma::RunnerContext&, QString const&, QString const&) (this=this@entry=0x5b03980, context=..., type=..., category=...) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/runners/baloo/baloosearchrunner.cpp:98
#11 0x00007fde6c0b5879 in SearchRunner::match(Plasma::RunnerContext&) (this=0x5b03980, context=...) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/runners/baloo/baloosearchrunner.cpp:160
#12 0x00007fde918ec540 in Plasma::AbstractRunner::performMatch(Plasma::RunnerContext&) () at /usr/lib/x86_64-linux-gnu/libKF5Runner.so.5
#13 0x00007fde9104fc90 in ThreadWeaver::Executor::run(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#14 0x00007fde9104e7e0 in ThreadWeaver::Job::execute(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#15 0x00007fde9104e28a in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#16 0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x7fde54002d90) at thread/qthread_unix.cpp:331
#17 0x00007fdf46f506fa in start_thread (arg=0x7fde4ffff700) at pthread_create.c:333
#18 0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 17 (Thread 0x7fde64f63700 (LWP 15313)):
#0  0x00007fdf46f563a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x5493f90) at thread/qwaitcondition_unix.cpp:136
#2  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x4d591b0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fde9104c2bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007fde910504e8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007fde9104e353 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x7fde5c002b90) at thread/qthread_unix.cpp:331
#10 0x00007fdf46f506fa in start_thread (arg=0x7fde64f63700) at pthread_create.c:333
#11 0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 16 (Thread 0x7fde65764700 (LWP 15312)):
#0  0x00007fdf46f563a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x5493f90) at thread/qwaitcondition_unix.cpp:136
#2  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x4d591b0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fde9104c2bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007fde910504e8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007fde9104e353 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x52df950) at thread/qthread_unix.cpp:331
#8  0x00007fdf46f506fa in start_thread (arg=0x7fde65764700) at pthread_create.c:333
#9  0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (Thread 0x7fde65f65700 (LWP 15311)):
#0  0x00007fdf46f563a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x5493f90) at thread/qwaitcondition_unix.cpp:136
#2  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x4d591b0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fde9104c2bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007fde910504e8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007fde9104e353 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x5412d80) at thread/qthread_unix.cpp:331
#8  0x00007fdf46f506fa in start_thread (arg=0x7fde65f65700) at pthread_create.c:333
#9  0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7fde66766700 (LWP 15310)):
#0  0x00007fdf46f563a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x5493f90) at thread/qwaitcondition_unix.cpp:136
#2  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x4d591b0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fde9104c2bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007fde910504e8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007fde9104e353 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x562cae0) at thread/qthread_unix.cpp:331
#8  0x00007fdf46f506fa in start_thread (arg=0x7fde66766700) at pthread_create.c:333
#9  0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7fde66f67700 (LWP 15309)):
#0  0x00007fdf46f563a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x5493f90) at thread/qwaitcondition_unix.cpp:136
#2  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x4d591b0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fde9104c2bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007fde910504e8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#11 0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#12 0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#13 0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#14 0x00007fde9104e353 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#15 0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x54b8630) at thread/qthread_unix.cpp:331
#16 0x00007fdf46f506fa in start_thread (arg=0x7fde66f67700) at pthread_create.c:333
#17 0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7fde67768700 (LWP 15308)):
#0  0x00007fdf46f563a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x5493f90) at thread/qwaitcondition_unix.cpp:136
#2  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x4d591b0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fde9104c2bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007fde910504e8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#11 0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#12 0x00007fde9104e353 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#13 0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x7fde68000bd0) at thread/qthread_unix.cpp:331
#14 0x00007fdf46f506fa in start_thread (arg=0x7fde67768700) at pthread_create.c:333
#15 0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7fde7a528700 (LWP 15307)):
#0  0x00007fdf46f563a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x5493f90) at thread/qwaitcondition_unix.cpp:136
#2  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x4d591b0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fde9104c2bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007fde910504e8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#11 0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#12 0x00007fde9104e353 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#13 0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x5ac6530) at thread/qthread_unix.cpp:331
#14 0x00007fdf46f506fa in start_thread (arg=0x7fde7a528700) at pthread_create.c:333
#15 0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7fde6f5e8700 (LWP 15306)):
#0  0x00007fdf46f563a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x5493f90) at thread/qwaitcondition_unix.cpp:136
#2  0x00007fdf47e7faeb in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x4d591b0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fde9104c2bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007fde910504e8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007fde91050542 in  () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#11 0x00007fde9104b46d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#12 0x00007fde9104e353 in ThreadWeaver::Thread::run() () at /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#13 0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x389edd0) at thread/qthread_unix.cpp:331
#14 0x00007fdf46f506fa in start_thread (arg=0x7fde6f5e8700) at pthread_create.c:333
#15 0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7fde82698700 (LWP 3992)):
#0  0x00007fdf4777be8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fdf444a339c in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7fde7c0048c0, timeout=<optimized out>, context=0x7fde7c000990) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:4135
#2  0x00007fdf444a339c in g_main_context_iterate (context=context@entry=0x7fde7c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3835
#3  0x00007fdf444a34ac in g_main_context_iteration (context=0x7fde7c000990, may_block=may_block@entry=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#4  0x00007fdf480b5a9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fde7c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007fdf4805cdea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fde82697cc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fdf47e798a4 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fde84bb07d7 in KCupsConnection::run() () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#8  0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x36bdd30) at thread/qthread_unix.cpp:331
#9  0x00007fdf46f506fa in start_thread (arg=0x7fde82698700) at pthread_create.c:333
#10 0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fde93718700 (LWP 3874)):
#0  0x00007fdf4777be8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fdf444a339c in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7fde8c003120, timeout=<optimized out>, context=0x7fde8c000990) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:4135
#2  0x00007fdf444a339c in g_main_context_iterate (context=context@entry=0x7fde8c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3835
#3  0x00007fdf444a34ac in g_main_context_iteration (context=0x7fde8c000990, may_block=may_block@entry=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#4  0x00007fdf480b5a9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fde8c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007fdf4805cdea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fde93717c90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fdf47e798a4 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fdf4b0d9ed6 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x2599170) at thread/qthread_unix.cpp:331
#9  0x00007fdf46f506fa in start_thread (arg=0x7fde93718700) at pthread_create.c:333
#10 0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fdf1abe8700 (LWP 3832)):
#0  0x00007fdf46f563a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fdf4cb1dbd4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007fdf4cb1dc19 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007fdf46f506fa in start_thread (arg=0x7fdf1abe8700) at pthread_create.c:333
#4  0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fdf1bfff700 (LWP 3831)):
#0  0x00007fdf444a291b in g_main_context_prepare (context=context@entry=0x7fdf14000990, priority=priority@entry=0x7fdf1bffebb0) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3440
#1  0x00007fdf444a32cb in g_main_context_iterate (context=context@entry=0x7fdf14000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3820
#2  0x00007fdf444a34ac in g_main_context_iteration (context=0x7fdf14000990, may_block=may_block@entry=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#3  0x00007fdf480b5a9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fdf140008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fdf4805cdea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fdf1bffece0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fdf47e798a4 in QThread::exec() (this=this@entry=0x238d490) at thread/qthread.cpp:503
#6  0x00007fdf4a7423c5 in QQmlThreadPrivate::run() (this=0x238d490) at qml/ftw/qqmlthread.cpp:141
#7  0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x238d490) at thread/qthread_unix.cpp:331
#8  0x00007fdf46f506fa in start_thread (arg=0x7fdf1bfff700) at pthread_create.c:333
#9  0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fdf22420700 (LWP 3829)):
#0  0x00007fdf444e7ac9 in g_mutex_lock (mutex=mutex@entry=0x7fdf1c000990) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gthread-posix.c:1335
#1  0x00007fdf444a2939 in g_main_context_prepare (context=context@entry=0x7fdf1c000990, priority=priority@entry=0x7fdf2241fbb0) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3444
#2  0x00007fdf444a32cb in g_main_context_iterate (context=context@entry=0x7fdf1c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3820
#3  0x00007fdf444a34ac in g_main_context_iteration (context=0x7fdf1c000990, may_block=may_block@entry=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#4  0x00007fdf480b5a9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fdf1c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007fdf4805cdea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fdf2241fce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fdf47e798a4 in QThread::exec() (this=this@entry=0x22f6e20) at thread/qthread.cpp:503
#7  0x00007fdf4a7423c5 in QQmlThreadPrivate::run() (this=0x22f6e20) at qml/ftw/qqmlthread.cpp:141
#8  0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x22f6e20) at thread/qthread_unix.cpp:331
#9  0x00007fdf46f506fa in start_thread (arg=0x7fdf22420700) at pthread_create.c:333
#10 0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fdf2d7f8700 (LWP 3828)):
#0  0x00007fdf46f563a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fdf2ed93213 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#2  0x00007fdf2ed92937 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#3  0x00007fdf46f506fa in start_thread (arg=0x7fdf2d7f8700) at pthread_create.c:333
#4  0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fdf35868700 (LWP 3820)):
#0  0x00007fdf444e7ae4 in g_mutex_unlock (mutex=0x7fdf28000990) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gthread-posix.c:1347
#1  0x00007fdf444a32be in g_main_context_iterate (context=context@entry=0x7fdf28000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3818
#2  0x00007fdf444a34ac in g_main_context_iteration (context=0x7fdf28000990, may_block=may_block@entry=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#3  0x00007fdf480b5a9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fdf280008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fdf4805cdea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fdf35867ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fdf47e798a4 in QThread::exec() (this=this@entry=0x2035fc0) at thread/qthread.cpp:503
#6  0x00007fdf4a7423c5 in QQmlThreadPrivate::run() (this=0x2035fc0) at qml/ftw/qqmlthread.cpp:141
#7  0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x2035fc0) at thread/qthread_unix.cpp:331
#8  0x00007fdf46f506fa in start_thread (arg=0x7fdf35868700) at pthread_create.c:333
#9  0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fdf380a0700 (LWP 3802)):
#0  0x00007fdf4777be8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fdf4b88ac62 in _xcb_conn_wait (__timeout=-1, __nfds=1, __fds=0x7fdf3809fc00) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  0x00007fdf4b88ac62 in _xcb_conn_wait (c=c@entry=0x1f4a1c0, cond=cond@entry=0x1f4a200, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:459
#3  0x00007fdf4b88c8d7 in xcb_wait_for_event (c=0x1f4a1c0) at ../../src/xcb_in.c:693
#4  0x00007fdf3a21a629 in QXcbEventReader::run() (this=0x1f5d1d0) at qxcbconnection.cpp:1253
#5  0x00007fdf47e7e84e in QThreadPrivate::start(void*) (arg=0x1f5d1d0) at thread/qthread_unix.cpp:331
#6  0x00007fdf46f506fa in start_thread (arg=0x7fdf380a0700) at pthread_create.c:333
#7  0x00007fdf47787b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fdf4d0de8c0 (LWP 3799)):
#0  0x00007fdf47777a2d in write () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fdf444e67e2 in g_wakeup_signal (wakeup=0x7fdf30001220) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gwakeup.c:239
#2  0x00007fdf4449f67b in g_main_context_remove_poll_unlocked (context=<optimized out>, fd=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:4322
#3  0x00007fdf4449f70c in block_source (source=source@entry=0x31af4d0) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3047
#4  0x00007fdf444a316d in g_main_context_dispatch (context=0x7fdf300016f0) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3136
#5  0x00007fdf444a316d in g_main_context_dispatch (context=context@entry=0x7fdf300016f0) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3769
#6  0x00007fdf444a3400 in g_main_context_iterate (context=context@entry=0x7fdf300016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3840
#7  0x00007fdf444a34ac in g_main_context_iteration (context=0x7fdf300016f0, may_block=may_block@entry=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#8  0x00007fdf480b5a7f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x1f33540, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#9  0x00007fdf4805cdea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffd77b8e2a0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#10 0x00007fdf48064e8c in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1229
#11 0x00007fdf4839ac3c in QGuiApplication::exec() () at kernel/qguiapplication.cpp:1542
#12 0x00007fdf48b60495 in QApplication::exec() () at kernel/qapplication.cpp:2976
#13 0x0000000000432d4a in main(int, char**) (argc=2, argv=<optimized out>) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/shell/main.cpp:181

Reported using DrKonqi