Bug 362088

Summary: Krunner crash with no real reason, plasma seem to reboot
Product: [Plasma] krunner Reporter: Lluís Turró <lluis>
Component: generalAssignee: Kai Uwe Broulik <kde>
Status: RESOLVED DUPLICATE    
Severity: crash CC: miso
Priority: NOR Keywords: drkonqi
Version: 5.5.5   
Target Milestone: ---   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Lluís Turró 2016-04-22 13:10:41 UTC 
Application: krunner (5.5.5)

Qt Version: 5.5.1
Operating System: Linux 4.4.0-21-generic x86_64
Distribution: Ubuntu 16.04 LTS

-- Information about the crash:
- What I was doing when the application crashed:
Simply moving among applications. This error does'nt seem to be related to an specific action or application.

- Unusual behavior I noticed:
The bottom bar disapears for a while. Some times, the application buttons on this bar are weirdly rendered.

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".
[Current thread is 1 (Thread 0x7fef9ce008c0 (LWP 1787))]

Thread 12 (Thread 0x7fef88cac700 (LWP 1788)):
#0  0x00007fef9984ee8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fef98d3fc62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fef98d418d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fef8adfa629 in QXcbEventReader::run (this=0xf85580) at qxcbconnection.cpp:1253
#4  0x00007fef99f4484e in QThreadPrivate::start (arg=0xf85580) at thread/qthread_unix.cpp:331
#5  0x00007fef97a9e6fa in start_thread (arg=0x7fef88cac700) at pthread_create.c:333
#6  0x00007fef9985ab5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7fef7ebbe700 (LWP 1791)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fef82af6213 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#2  0x00007fef82af5937 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#3  0x00007fef97a9e6fa in start_thread (arg=0x7fef7ebbe700) at pthread_create.c:333
#4  0x00007fef9985ab5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7fef7a4c3700 (LWP 1796)):
#0  0x00007fef9984ee8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fef96f1d31c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fef96f1d42c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fef9a17ba9b in QEventDispatcherGlib::processEvents (this=0x7fef740008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fef9a122dea in QEventLoop::exec (this=this@entry=0x7fef7a4c2ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fef99f3f8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fef9bdb73c5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fef99f4484e in QThreadPrivate::start (arg=0x12fa540) at thread/qthread_unix.cpp:331
#8  0x00007fef97a9e6fa in start_thread (arg=0x7fef7a4c3700) at pthread_create.c:333
#9  0x00007fef9985ab5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7fef6af79700 (LWP 3754)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fef99f45aeb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1243130) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x119c450, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fef7339050b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked (this=this@entry=0x1164460, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007fef733912bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait (this=0x1164460, th=th@entry=0x18c3ad0, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007fef733954e8 in ThreadWeaver::WorkingHardState::applyForWork (this=0x11375d0, th=0x18c3ad0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007fef7339046d in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x18c3ad0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007fef73395542 in ThreadWeaver::WorkingHardState::applyForWork (this=0x11375d0, th=0x18c3ad0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007fef7339046d in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x18c3ad0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007fef73393353 in ThreadWeaver::Thread::run (this=0x18c3ad0) at ../../src/thread.cpp:103
#10 0x00007fef99f4484e in QThreadPrivate::start (arg=0x18c3ad0) at thread/qthread_unix.cpp:331
#11 0x00007fef97a9e6fa in start_thread (arg=0x7fef6af79700) at pthread_create.c:333
#12 0x00007fef9985ab5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fef6a778700 (LWP 3755)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fef99f45aeb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1243130) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x119c450, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fef7339050b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked (this=this@entry=0x1164460, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007fef733912bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait (this=0x1164460, th=th@entry=0x1497ed0, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007fef733954e8 in ThreadWeaver::WorkingHardState::applyForWork (this=0x11375d0, th=0x1497ed0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007fef7339046d in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x1497ed0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007fef73395542 in ThreadWeaver::WorkingHardState::applyForWork (this=0x11375d0, th=0x1497ed0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007fef7339046d in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x1497ed0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007fef73393353 in ThreadWeaver::Thread::run (this=0x1497ed0) at ../../src/thread.cpp:103
#10 0x00007fef99f4484e in QThreadPrivate::start (arg=0x1497ed0) at thread/qthread_unix.cpp:331
#11 0x00007fef97a9e6fa in start_thread (arg=0x7fef6a778700) at pthread_create.c:333
#12 0x00007fef9985ab5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fef69f77700 (LWP 3756)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fef99f45aeb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1243130) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x119c450, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fef7339050b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked (this=this@entry=0x1164460, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007fef733912bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait (this=0x1164460, th=th@entry=0x7fef64002d90, threadWasBusy=threadWasBusy@entry=true, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007fef733954e8 in ThreadWeaver::WorkingHardState::applyForWork (this=0x11375d0, th=0x7fef64002d90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007fef7339046d in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x7fef64002d90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007fef73393353 in ThreadWeaver::Thread::run (this=0x7fef64002d90) at ../../src/thread.cpp:103
#8  0x00007fef99f4484e in QThreadPrivate::start (arg=0x7fef64002d90) at thread/qthread_unix.cpp:331
#9  0x00007fef97a9e6fa in start_thread (arg=0x7fef69f77700) at pthread_create.c:333
#10 0x00007fef9985ab5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fef69776700 (LWP 3757)):
[KCrash Handler]
#6  0x00007fef70472d24 in mdb_env_pick_meta (env=0x7fef5c08a9f0) at mdb.c:3850
#7  mdb_txn_renew0 (txn=txn@entry=0x7fef4406e0e0) at mdb.c:2628
#8  0x00007fef70473f14 in mdb_txn_begin (env=0x7fef5c08a9f0, parent=0x0, flags=131072, ret=0x7fef69775908) at mdb.c:2850
#9  0x00007fef70aecbbe in Baloo::SearchStore::exec (this=this@entry=0x7fef697759f0, term=..., offset=0, limit=10, sortResults=<optimized out>) at ../../../src/lib/searchstore.cpp:74
#10 0x00007fef70adbbc2 in Baloo::Query::exec (this=this@entry=0x7fef69775aa0) at ../../../src/lib/query.cpp:210
#11 0x00007fef70cfcf2f in SearchRunner::match (this=this@entry=0x101d950, context=..., type=..., category=...) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/runners/baloo/baloosearchrunner.cpp:98
#12 0x00007fef70cfd879 in SearchRunner::match (this=0x101d950, context=...) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/runners/baloo/baloosearchrunner.cpp:160
#13 0x00007fef735b0540 in Plasma::AbstractRunner::performMatch (this=0x101d950, localContext=...) at ../../src/abstractrunner.cpp:131
#14 0x00007fef73394c90 in ThreadWeaver::Executor::run (this=<optimized out>, job=..., thread=<optimized out>) at ../../src/executor.cpp:52
#15 0x00007fef733937e0 in ThreadWeaver::Job::execute (this=<optimized out>, self=..., th=0x7fef5c002f90) at ../../src/job.cpp:83
#16 0x00007fef7339328a in ThreadWeaver::Thread::run (this=0x7fef5c002f90) at ../../src/thread.cpp:114
#17 0x00007fef99f4484e in QThreadPrivate::start (arg=0x7fef5c002f90) at thread/qthread_unix.cpp:331
#18 0x00007fef97a9e6fa in start_thread (arg=0x7fef69776700) at pthread_create.c:333
#19 0x00007fef9985ab5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fef68f75700 (LWP 3758)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fef99f45aeb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1243130) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x119c450, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fef7339050b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked (this=this@entry=0x1164460, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007fef733912bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait (this=0x1164460, th=th@entry=0x7fef640033d0, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007fef733954e8 in ThreadWeaver::WorkingHardState::applyForWork (this=0x11375d0, th=0x7fef640033d0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007fef7339046d in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x7fef640033d0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007fef73395542 in ThreadWeaver::WorkingHardState::applyForWork (this=0x11375d0, th=0x7fef640033d0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007fef7339046d in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x7fef640033d0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007fef73393353 in ThreadWeaver::Thread::run (this=0x7fef640033d0) at ../../src/thread.cpp:103
#10 0x00007fef99f4484e in QThreadPrivate::start (arg=0x7fef640033d0) at thread/qthread_unix.cpp:331
#11 0x00007fef97a9e6fa in start_thread (arg=0x7fef68f75700) at pthread_create.c:333
#12 0x00007fef9985ab5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fef5bfff700 (LWP 3759)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fef99f45aeb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1243130) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x119c450, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fef7339050b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked (this=this@entry=0x1164460, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007fef733912bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait (this=0x1164460, th=th@entry=0x7fef60002f90, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007fef733954e8 in ThreadWeaver::WorkingHardState::applyForWork (this=0x11375d0, th=0x7fef60002f90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007fef7339046d in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x7fef60002f90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007fef73395542 in ThreadWeaver::WorkingHardState::applyForWork (this=0x11375d0, th=0x7fef60002f90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007fef7339046d in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x7fef60002f90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007fef73393353 in ThreadWeaver::Thread::run (this=0x7fef60002f90) at ../../src/thread.cpp:103
#10 0x00007fef99f4484e in QThreadPrivate::start (arg=0x7fef60002f90) at thread/qthread_unix.cpp:331
#11 0x00007fef97a9e6fa in start_thread (arg=0x7fef5bfff700) at pthread_create.c:333
#12 0x00007fef9985ab5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fef5b7fe700 (LWP 3760)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fef99f45aeb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1243130) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x119c450, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fef7339050b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked (this=this@entry=0x1164460, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007fef733912bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait (this=0x1164460, th=th@entry=0x7fef54002d90, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007fef733954e8 in ThreadWeaver::WorkingHardState::applyForWork (this=0x11375d0, th=0x7fef54002d90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007fef7339046d in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x7fef54002d90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007fef73395542 in ThreadWeaver::WorkingHardState::applyForWork (this=0x11375d0, th=0x7fef54002d90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007fef7339046d in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x7fef54002d90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007fef73393353 in ThreadWeaver::Thread::run (this=0x7fef54002d90) at ../../src/thread.cpp:103
#10 0x00007fef99f4484e in QThreadPrivate::start (arg=0x7fef54002d90) at thread/qthread_unix.cpp:331
#11 0x00007fef97a9e6fa in start_thread (arg=0x7fef5b7fe700) at pthread_create.c:333
#12 0x00007fef9985ab5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fef5affd700 (LWP 3761)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fef99f45aeb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1243130) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x119c450, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fef7339050b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked (this=this@entry=0x1164460, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007fef733912bf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait (this=0x1164460, th=th@entry=0x7fef4c003190, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007fef733954e8 in ThreadWeaver::WorkingHardState::applyForWork (this=0x11375d0, th=0x7fef4c003190, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007fef7339046d in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x7fef4c003190, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007fef73395542 in ThreadWeaver::WorkingHardState::applyForWork (this=0x11375d0, th=0x7fef4c003190, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007fef7339046d in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x7fef4c003190, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007fef73393353 in ThreadWeaver::Thread::run (this=0x7fef4c003190) at ../../src/thread.cpp:103
#10 0x00007fef99f4484e in QThreadPrivate::start (arg=0x7fef4c003190) at thread/qthread_unix.cpp:331
#11 0x00007fef97a9e6fa in start_thread (arg=0x7fef5affd700) at pthread_create.c:333
#12 0x00007fef9985ab5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fef9ce008c0 (LWP 1787)):
#0  0x00007fef96f1caf0 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fef96f1d297 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fef96f1d42c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fef9a17ba9b in QEventDispatcherGlib::processEvents (this=0xfbff10, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fef9a122dea in QEventLoop::exec (this=this@entry=0x7fff72f15110, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fef9a12ae8c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#6  0x00007fef9a45ec3c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1542
#7  0x00007fef9aca2495 in QApplication::exec () at kernel/qapplication.cpp:2976
#8  0x0000000000407697 in main (argc=1, argv=<optimized out>) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/krunner/main.cpp:80

Possible duplicates by query: bug 358421.

Reported using DrKonqi
Comment 1 Lluís Turró 2016-04-26 08:09:10 UTC 
Just changed System Settings -> Compositor -> Rendering backend : to OpenGL 3.1 and the error has disappeared since. For three days now.
Comment 2 Lluís Turró 2016-04-26 08:09:47 UTC 
Forgot to say, Rendering backend was set to OpenGL 2.0
Comment 3 Kai Uwe Broulik 2016-09-07 08:44:16 UTC 

*** This bug has been marked as a duplicate of bug 353342 ***