Bug 361183

Summary: krunner crashed when starting iceweasel from alt-F2 (iceweasel still started)
Product: [Plasma] krunner Reporter: Arthur Marsh <arthur.marsh>
Component: generalAssignee: Vishesh Handa <me>
Status: RESOLVED DUPLICATE    
Severity: crash CC: pd.schiansky
Priority: NOR Keywords: drkonqi
Version First Reported In: 5.5.4   
Target Milestone: ---   
Platform: Debian unstable   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Arthur Marsh 2016-03-30 12:43:45 UTC 
Application: krunner (5.5.4)

Qt Version: 5.5.1
Operating System: Linux 4.6.0-rc1 x86_64
Distribution: Debian GNU/Linux unstable (sid)

-- Information about the crash:
after starting a new plasma session, using alt-F2 to start iceweasel resulted in a krunner crash, this time iceweasel started successfully.

The crash can be reproduced sometimes.

-- Backtrace:
Application: krunner (krunner), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
[Current thread is 1 (Thread 0x7febb40b17c0 (LWP 10721))]

Thread 12 (Thread 0x7febb39ef700 (LWP 10722)):
#0  0x00000030004dfe4d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x000000300340a382 in _xcb_conn_wait (__timeout=-1, __nfds=1, __fds=0x7febb39eed00) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  0x000000300340a382 in _xcb_conn_wait (c=c@entry=0xa5e470, cond=cond@entry=0xa5e4b0, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:459
#3  0x000000300340bff7 in xcb_wait_for_event (c=0xa5e470) at ../../src/xcb_in.c:693
#4  0x00007febb3e4e789 in QXcbEventReader::run() (this=0xa714c0) at qxcbconnection.cpp:1230
#5  0x00000030174a57fe in QThreadPrivate::start(void*) (arg=0xa714c0) at thread/qthread_unix.cpp:331
#6  0x0000003000c07454 in start_thread (arg=0x7febb39ef700) at pthread_create.c:334
#7  0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7febb0f73700 (LWP 10728)):
#0  0x0000003000c0d04f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007febb1c17c43 in radeon_drm_cs_emit_ioctl (mtx=0xb551c0, cond=0xb551e8) at ../../../../../../../include/c11/threads_posix.h:159
#2  0x00007febb1c17c43 in radeon_drm_cs_emit_ioctl (sema=0xb551c0) at ../../../../../../../src/gallium/auxiliary/os/os_thread.h:259
#3  0x00007febb1c17c43 in radeon_drm_cs_emit_ioctl (param=param@entry=0xb54e70) at ../../../../../../../src/gallium/winsys/radeon/drm/radeon_drm_winsys.c:653
#4  0x00007febb1c17397 in impl_thrd_routine (p=<optimized out>) at ../../../../../../../include/c11/threads_posix.h:87
#5  0x0000003000c07454 in start_thread (arg=0x7febb0f73700) at pthread_create.c:334
#6  0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7feba906e700 (LWP 10771)):
#0  0x0000003003c49907 in g_main_context_prepare (context=context@entry=0x7feba4000990, priority=priority@entry=0x7feba906dcb0) at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./glib/gmain.c:3497
#1  0x0000003003c4a25b in g_main_context_iterate (context=context@entry=0x7feba4000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./glib/gmain.c:3820
#2  0x0000003003c4a43c in g_main_context_iteration (context=0x7feba4000990, may_block=may_block@entry=1) at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./glib/gmain.c:3901
#3  0x00000030176dca5b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7feba40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x0000003017683d6a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7feba906dde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00000030174a0854 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#6  0x0000003046ed5105 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00000030174a57fe in QThreadPrivate::start(void*) (arg=0xe688b0) at thread/qthread_unix.cpp:331
#8  0x0000003000c07454 in start_thread (arg=0x7feba906e700) at pthread_create.c:334
#9  0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7feb9edc1700 (LWP 11048)):
#0  0x0000003000c0d04f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0xd10a40) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0xeb20f0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007feba2e7102b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0xd9fad0, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007feba2e71ddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0xd9fad0, th=th@entry=0x16567a0, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007feba2e76038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0xd10ab0, th=0x16567a0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007feba2e70f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x16567a0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007feba2e76092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0xd10ab0, th=0x16567a0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007feba2e70f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x16567a0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007feba2e73ea3 in ThreadWeaver::Thread::run() (this=0x16567a0) at ../../src/thread.cpp:103
#10 0x00000030174a57fe in QThreadPrivate::start(void*) (arg=0x16567a0) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7feb9edc1700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7feb965c0700 (LWP 11049)):
#0  0x0000003000c0d04f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0xd10a40) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0xeb20f0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007feba2e7102b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0xd9fad0, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007feba2e71ddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0xd9fad0, th=th@entry=0x161e110, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007feba2e76038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0xd10ab0, th=0x161e110, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007feba2e70f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x161e110, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007feba2e76092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0xd10ab0, th=0x161e110, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007feba2e70f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x161e110, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007feba2e73ea3 in ThreadWeaver::Thread::run() (this=0x161e110) at ../../src/thread.cpp:103
#10 0x00000030174a57fe in QThreadPrivate::start(void*) (arg=0x161e110) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7feb965c0700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7feb9e5c0700 (LWP 11050)):
#0  0x0000003000c0d04f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0xd10a40) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0xeb20f0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007feba2e7102b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0xd9fad0, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007feba2e71ddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0xd9fad0, th=th@entry=0x1630420, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007feba2e76038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0xd10ab0, th=0x1630420, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007feba2e70f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x1630420, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007feba2e76092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0xd10ab0, th=0x1630420, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007feba2e70f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x1630420, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007feba2e73ea3 in ThreadWeaver::Thread::run() (this=0x1630420) at ../../src/thread.cpp:103
#10 0x00000030174a57fe in QThreadPrivate::start(void*) (arg=0x1630420) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7feb9e5c0700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7feb9ddbf700 (LWP 11051)):
#0  0x0000003000c0d04f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0xd10a40) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0xeb20f0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007feba2e7102b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0xd9fad0, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007feba2e71ddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0xd9fad0, th=th@entry=0x7feb98002d90, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007feba2e76038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0xd10ab0, th=0x7feb98002d90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007feba2e70f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x7feb98002d90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007feba2e76092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0xd10ab0, th=0x7feb98002d90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007feba2e70f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x7feb98002d90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007feba2e73ea3 in ThreadWeaver::Thread::run() (this=0x7feb98002d90) at ../../src/thread.cpp:103
#10 0x00000030174a57fe in QThreadPrivate::start(void*) (arg=0x7feb98002d90) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7feb9ddbf700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7feb9d5be700 (LWP 11052)):
[KCrash Handler]
#6  0x0000003000490f48 in __memcpy_sse2_unaligned () at ../sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S:167
#7  0x00000030c3e2b7ea in Baloo::PostingCodec::decode(QByteArray const&) () at /usr/lib/x86_64-linux-gnu/libKF5BalooEngine.so.5
#8  0x00000030c3e1808e in  () at /usr/lib/x86_64-linux-gnu/libKF5BalooEngine.so.5
#9  0x00000030c3e18151 in Baloo::PostingDB::iter(QByteArray const&) () at /usr/lib/x86_64-linux-gnu/libKF5BalooEngine.so.5
#10 0x00000030c3e210db in Baloo::Transaction::postingIterator(Baloo::EngineQuery const&) const () at /usr/lib/x86_64-linux-gnu/libKF5BalooEngine.so.5
#11 0x00000030c3a1fe9d in  () at /usr/lib/x86_64-linux-gnu/libKF5Baloo.so.5
#12 0x00000030c3a2002e in  () at /usr/lib/x86_64-linux-gnu/libKF5Baloo.so.5
#13 0x00000030c3a2102c in  () at /usr/lib/x86_64-linux-gnu/libKF5Baloo.so.5
#14 0x00000030c3a0fff2 in Baloo::Query::exec() () at /usr/lib/x86_64-linux-gnu/libKF5Baloo.so.5
#15 0x00007feba1298f2f in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/krunner_baloosearchrunner.so
#16 0x00007feba1299879 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/krunner_baloosearchrunner.so
#17 0x00007feba3091f40 in Plasma::AbstractRunner::performMatch(Plasma::RunnerContext&) (this=0x169de90, localContext=...) at ../../src/abstractrunner.cpp:131
#18 0x00007feba2e757e0 in ThreadWeaver::Executor::run(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) (this=<optimized out>, job=..., thread=<optimized out>) at ../../src/executor.cpp:52
#19 0x00007feba2e74330 in ThreadWeaver::Job::execute(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) (this=<optimized out>, self=..., th=0x1657060) at ../../src/job.cpp:83
#20 0x00007feba2e73dda in ThreadWeaver::Thread::run() (this=0x1657060) at ../../src/thread.cpp:114
#21 0x00000030174a57fe in QThreadPrivate::start(void*) (arg=0x1657060) at thread/qthread_unix.cpp:331
#22 0x0000003000c07454 in start_thread (arg=0x7feb9d5be700) at pthread_create.c:334
#23 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7feb9cdbd700 (LWP 11053)):
#0  0x0000003000c0d04f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0xd10a40) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0xeb20f0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007feba2e7102b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0xd9fad0, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007feba2e71ddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0xd9fad0, th=th@entry=0x7feb90002f90, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007feba2e76038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0xd10ab0, th=0x7feb90002f90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007feba2e70f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x7feb90002f90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007feba2e76092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0xd10ab0, th=0x7feb90002f90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007feba2e70f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x7feb90002f90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007feba2e73ea3 in ThreadWeaver::Thread::run() (this=0x7feb90002f90) at ../../src/thread.cpp:103
#10 0x00000030174a57fe in QThreadPrivate::start(void*) (arg=0x7feb90002f90) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7feb9cdbd700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7feb97fff700 (LWP 11054)):
#0  0x0000003000c0d04f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0xd10a40) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0xeb20f0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007feba2e7102b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0xd9fad0, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007feba2e71ddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0xd9fad0, th=th@entry=0x7feb88002f90, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007feba2e76038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0xd10ab0, th=0x7feb88002f90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007feba2e70f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x7feb88002f90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007feba2e76092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0xd10ab0, th=0x7feb88002f90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007feba2e70f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x7feb88002f90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007feba2e73ea3 in ThreadWeaver::Thread::run() (this=0x7feb88002f90) at ../../src/thread.cpp:103
#10 0x00000030174a57fe in QThreadPrivate::start(void*) (arg=0x7feb88002f90) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7feb97fff700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7feb977fe700 (LWP 11055)):
#0  0x0000003000c0d04f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0xd10a40) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0xeb20f0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007feba2e7102b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0xd9fad0, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007feba2e71ddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0xd9fad0, th=th@entry=0x7feb8c002d90, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007feba2e76038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0xd10ab0, th=0x7feb8c002d90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007feba2e70f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x7feb8c002d90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007feba2e76092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0xd10ab0, th=0x7feb8c002d90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007feba2e70f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x7feb8c002d90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007feba2e73ea3 in ThreadWeaver::Thread::run() (this=0x7feb8c002d90) at ../../src/thread.cpp:103
#10 0x00000030174a57fe in QThreadPrivate::start(void*) (arg=0x7feb8c002d90) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7feb977fe700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7febb40b17c0 (LWP 10721)):
#0  0x0000003000c0d04f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x000000300340a5d9 in _xcb_conn_wait (c=c@entry=0xa5e470, cond=cond@entry=0x7ffdf22058d0, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:427
#2  0x000000300340bd37 in wait_for_reply (c=c@entry=0xa5e470, request=1061, e=e@entry=0x0) at ../../src/xcb_in.c:516
#3  0x000000300340be41 in xcb_wait_for_reply (c=c@entry=0xa5e470, request=1061, e=e@entry=0x0) at ../../src/xcb_in.c:546
#4  0x0000003003410175 in xcb_intern_atom_reply (c=c@entry=0xa5e470, cookie=..., e=e@entry=0x0) at xproto.c:2143
#5  0x00007febb032b489 in KWindowEffectsPrivateX11::slideWindow(unsigned long long, KWindowEffects::SlideFromLocation, int) (this=<optimized out>, id=44040202, location=KWindowEffects::TopEdge, offset=-1) at ../../../../src/platforms/xcb/kwindoweffects.cpp:127
#6  0x00000030ad4246af in  () at /usr/lib/x86_64-linux-gnu/libKF5PlasmaQuick.so.5
#7  0x00000030ad4263c3 in PlasmaQuick::Dialog::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libKF5PlasmaQuick.so.5
#8  0x0000000000409e8f in View::event(QEvent*) ()
#9  0x000000301d75affc in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0xa4fd10, receiver=receiver@entry=0x7ffdf220bf30, e=e@entry=0x7ffdf2205d80) at kernel/qapplication.cpp:3716
#10 0x000000301d7604b6 in QApplication::notify(QObject*, QEvent*) (this=0x7ffdf220bec0, receiver=0x7ffdf220bf30, e=0x7ffdf2205d80) at kernel/qapplication.cpp:3499
#11 0x00000030176865ab in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7ffdf220bec0, receiver=receiver@entry=0x7ffdf220bf30, event=event@entry=0x7ffdf2205d80) at kernel/qcoreapplication.cpp:965
#12 0x000000301c0f972f in QWindow::setVisible(bool) (event=0x7ffdf2205d80, receiver=0x7ffdf220bf30) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#13 0x000000301c0f972f in QWindow::setVisible(bool) (this=0x7ffdf220bf30, visible=false) at kernel/qwindow.cpp:520
#14 0x00000030ad422420 in PlasmaQuick::Dialog::setVisible(bool) () at /usr/lib/x86_64-linux-gnu/libKF5PlasmaQuick.so.5
#15 0x00000030ad4253f3 in  () at /usr/lib/x86_64-linux-gnu/libKF5PlasmaQuick.so.5
#16 0x00000030ad426b6b in PlasmaQuick::Dialog::qt_metacall(QMetaObject::Call, int, void**) () at /usr/lib/x86_64-linux-gnu/libKF5PlasmaQuick.so.5
#17 0x000000000040a2c5 in View::qt_metacall(QMetaObject::Call, int, void**) ()
#18 0x0000003046e512b0 in QQmlPropertyPrivate::write(QObject*, QQmlPropertyData const&, QVariant const&, QQmlContextData*, QFlags<QQmlPropertyPrivate::WriteFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#19 0x0000003046e1dfdd in QV4::QObjectWrapper::setProperty(QObject*, QV4::ExecutionContext*, QQmlPropertyData*, QV4::Value const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#20 0x0000003046e1e658 in QV4::QObjectWrapper::setQmlProperty(QV4::ExecutionEngine*, QQmlContextData*, QObject*, QV4::String*, QV4::QObjectWrapper::RevisionMode, QV4::Value const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#21 0x0000003046e1e792 in QV4::QObjectWrapper::put(QV4::Managed*, QV4::String*, QV4::Value const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#22 0x0000003046e2dcf2 in QV4::Runtime::setProperty(QV4::ExecutionEngine*, QV4::Value const&, int, QV4::Value const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#23 0x00007feba2b017d5 in  ()
#24 0x0000000000000000 in  ()

Reported using DrKonqi
Comment 1 Peter Schiansky 2016-03-30 23:08:55 UTC 
Can confirm this. Same behaviour.
I'm too on Debian sid
with QT 5.5.1
kernel 4.5.0
Comment 2 Christoph Feck 2016-05-11 00:46:49 UTC 

*** This bug has been marked as a duplicate of bug 352260 ***