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:
when attempting to start konsole via alt-F2 after restarting a KDE plasma session following updates, krunner crashed and konsole did not start.

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 0x7f90be01b7c0 (LWP 23146))]

Thread 12 (Thread 0x7f90bd959700 (LWP 23147)):
#0  0x00000030004dfe4d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x000000300340a382 in _xcb_conn_wait (__timeout=-1, __nfds=1, __fds=0x7f90bd958d00) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  0x000000300340a382 in _xcb_conn_wait (c=c@entry=0x2522470, cond=cond@entry=0x25224b0, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:459
#3  0x000000300340bff7 in xcb_wait_for_event (c=0x2522470) at ../../src/xcb_in.c:693
#4  0x00007f90bddb8789 in QXcbEventReader::run() (this=0x25354c0) at qxcbconnection.cpp:1230
#5  0x00000030174a57fe in QThreadPrivate::start(void*) (arg=0x25354c0) at thread/qthread_unix.cpp:331
#6  0x0000003000c07454 in start_thread (arg=0x7f90bd959700) at pthread_create.c:334
#7  0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7f90b4973700 (LWP 23151)):
#0  0x0000003000c0d04f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f90b79b3c43 in radeon_drm_cs_emit_ioctl (mtx=0x2618f40, cond=0x2618f68) at ../../../../../../../include/c11/threads_posix.h:159
#2  0x00007f90b79b3c43 in radeon_drm_cs_emit_ioctl (sema=0x2618f40) at ../../../../../../../src/gallium/auxiliary/os/os_thread.h:259
#3  0x00007f90b79b3c43 in radeon_drm_cs_emit_ioctl (param=param@entry=0x2618bf0) at ../../../../../../../src/gallium/winsys/radeon/drm/radeon_drm_winsys.c:653
#4  0x00007f90b79b3397 in impl_thrd_routine (p=<optimized out>) at ../../../../../../../include/c11/threads_posix.h:87
#5  0x0000003000c07454 in start_thread (arg=0x7f90b4973700) at pthread_create.c:334
#6  0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7f90b2fd8700 (LWP 23153)):
#0  0x000000300408ea70 in g_mutex_lock (mutex=mutex@entry=0x7f90ac000990) at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./glib/gthread-posix.c:1338
#1  0x0000003004049ae1 in g_main_context_query (context=context@entry=0x7f90ac000990, max_priority=2147483647, timeout=timeout@entry=0x7f90b2fd7cb4, fds=fds@entry=0x7f90ac003070, n_fds=n_fds@entry=1) at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./glib/gmain.c:3544
#2  0x000000300404a2a7 in g_main_context_iterate (context=context@entry=0x7f90ac000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./glib/gmain.c:3822
#3  0x000000300404a43c in g_main_context_iteration (context=0x7f90ac000990, may_block=may_block@entry=1) at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./glib/gmain.c:3901
#4  0x00000030176dca5b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f90ac0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x0000003017683d6a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f90b2fd7de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00000030174a0854 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00000030476d5105 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00000030174a57fe in QThreadPrivate::start(void*) (arg=0x2956760) at thread/qthread_unix.cpp:331
#9  0x0000003000c07454 in start_thread (arg=0x7f90b2fd8700) at pthread_create.c:334
#10 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f90a8d20700 (LWP 23289)):
#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=0x288ed90) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x27d39b0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007f90b0ddb02b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0x27bca80, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007f90b0ddbddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0x27bca80, th=th@entry=0x3169d00, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007f90b0de0038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x27c8810, th=0x3169d00, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007f90b0ddaf8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x3169d00, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007f90b0de0092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x27c8810, th=0x3169d00, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007f90b0ddaf8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x3169d00, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007f90b0dddea3 in ThreadWeaver::Thread::run() (this=0x3169d00) at ../../src/thread.cpp:103
#10 0x00000030174a57fe in QThreadPrivate::start(void*) (arg=0x3169d00) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7f90a8d20700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f90a3fff700 (LWP 23290)):
[KCrash Handler]
#6  0x00000030da003c14 in  () at /usr/lib/x86_64-linux-gnu/liblmdb.so.0
#7  0x00000030da004db4 in mdb_txn_begin () at /usr/lib/x86_64-linux-gnu/liblmdb.so.0
#8  0x00000030c542101e in  () at /usr/lib/x86_64-linux-gnu/libKF5Baloo.so.5
#9  0x00000030c540fff2 in Baloo::Query::exec() () at /usr/lib/x86_64-linux-gnu/libKF5Baloo.so.5
#10 0x00007f90b00f7f2f in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/krunner_baloosearchrunner.so
#11 0x00007f90b00f8879 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/krunner_baloosearchrunner.so
#12 0x00007f90b0ffbf40 in Plasma::AbstractRunner::performMatch(Plasma::RunnerContext&) (this=0x31b3b80, localContext=...) at ../../src/abstractrunner.cpp:131
#13 0x00007f90b0ddf7e0 in ThreadWeaver::Executor::run(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) (this=<optimized out>, job=..., thread=<optimized out>) at ../../src/executor.cpp:52
#14 0x00007f90b0dde330 in ThreadWeaver::Job::execute(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) (this=<optimized out>, self=..., th=0x316f3a0) at ../../src/job.cpp:83
#15 0x00007f90b0ddddda in ThreadWeaver::Thread::run() (this=0x316f3a0) at ../../src/thread.cpp:114
#16 0x00000030174a57fe in QThreadPrivate::start(void*) (arg=0x316f3a0) at thread/qthread_unix.cpp:331
#17 0x0000003000c07454 in start_thread (arg=0x7f90a3fff700) at pthread_create.c:334
#18 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f90a37fe700 (LWP 23291)):
#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=0x288ed90) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x27d39b0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007f90b0ddb02b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0x27bca80, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007f90b0ddbddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0x27bca80, th=th@entry=0x315a9e0, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007f90b0de0038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x27c8810, th=0x315a9e0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007f90b0ddaf8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x315a9e0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007f90b0de0092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x27c8810, th=0x315a9e0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007f90b0ddaf8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x315a9e0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007f90b0dddea3 in ThreadWeaver::Thread::run() (this=0x315a9e0) at ../../src/thread.cpp:103
#10 0x00000030174a57fe in QThreadPrivate::start(void*) (arg=0x315a9e0) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7f90a37fe700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f90a2ffd700 (LWP 23292)):
#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=0x288ed90) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x27d39b0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007f90b0ddb02b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0x27bca80, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007f90b0ddbddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0x27bca80, th=th@entry=0x7f90a4002d90, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007f90b0de0038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x27c8810, th=0x7f90a4002d90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007f90b0ddaf8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x7f90a4002d90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007f90b0de0092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x27c8810, th=0x7f90a4002d90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007f90b0ddaf8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x7f90a4002d90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007f90b0dddea3 in ThreadWeaver::Thread::run() (this=0x7f90a4002d90) at ../../src/thread.cpp:103
#10 0x00000030174a57fe in QThreadPrivate::start(void*) (arg=0x7f90a4002d90) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7f90a2ffd700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f90a27fc700 (LWP 23293)):
#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=0x288ed90) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x27d39b0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007f90b0ddb02b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0x27bca80, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007f90b0ddbddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0x27bca80, th=th@entry=0x316f0a0, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007f90b0de0038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x27c8810, th=0x316f0a0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007f90b0ddaf8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x316f0a0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007f90b0de0092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x27c8810, th=0x316f0a0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007f90b0ddaf8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x316f0a0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007f90b0dddea3 in ThreadWeaver::Thread::run() (this=0x316f0a0) at ../../src/thread.cpp:103
#10 0x00000030174a57fe in QThreadPrivate::start(void*) (arg=0x316f0a0) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7f90a27fc700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f90a1ffb700 (LWP 23294)):
#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=0x288ed90) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x27d39b0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007f90b0ddb02b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0x27bca80, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007f90b0ddbddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0x27bca80, th=th@entry=0x7f909c002f90, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007f90b0de0038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x27c8810, th=0x7f909c002f90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007f90b0ddaf8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x7f909c002f90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007f90b0de0092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x27c8810, th=0x7f909c002f90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007f90b0ddaf8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x7f909c002f90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007f90b0dddea3 in ThreadWeaver::Thread::run() (this=0x7f909c002f90) at ../../src/thread.cpp:103
#10 0x00000030174a57fe in QThreadPrivate::start(void*) (arg=0x7f909c002f90) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7f90a1ffb700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f90a17fa700 (LWP 23295)):
#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=0x288ed90) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x27d39b0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007f90b0ddb02b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0x27bca80, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007f90b0ddbddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0x27bca80, th=th@entry=0x7f90a4003430, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007f90b0de0038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x27c8810, th=0x7f90a4003430, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007f90b0ddaf8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x7f90a4003430, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007f90b0de0092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x27c8810, th=0x7f90a4003430, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007f90b0ddaf8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x7f90a4003430, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007f90b0dddea3 in ThreadWeaver::Thread::run() (this=0x7f90a4003430) at ../../src/thread.cpp:103
#10 0x00000030174a57fe in QThreadPrivate::start(void*) (arg=0x7f90a4003430) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7f90a17fa700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f90a0ff9700 (LWP 23296)):
#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=0x288ed90) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030174a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x27d39b0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007f90b0ddb02b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0x27bca80, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007f90b0ddbddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0x27bca80, th=th@entry=0x7f9084002d90, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007f90b0de0038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x27c8810, th=0x7f9084002d90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007f90b0ddaf8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x7f9084002d90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007f90b0de0092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x27c8810, th=0x7f9084002d90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007f90b0ddaf8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x7f9084002d90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007f90b0dddea3 in ThreadWeaver::Thread::run() (this=0x7f9084002d90) at ../../src/thread.cpp:103
#10 0x00000030174a57fe in QThreadPrivate::start(void*) (arg=0x7f9084002d90) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7f90a0ff9700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f90be01b7c0 (LWP 23146)):
#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=0x2522470, cond=cond@entry=0x7ffca60fc200, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:427
#2  0x000000300340bd37 in wait_for_reply (c=c@entry=0x2522470, request=1062, e=e@entry=0x7ffca60fc2d0) at ../../src/xcb_in.c:516
#3  0x000000300340be41 in xcb_wait_for_reply (c=c@entry=0x2522470, request=1062, e=e@entry=0x7ffca60fc2d0) at ../../src/xcb_in.c:546
#4  0x0000003003c43317 in _XReply (dpy=dpy@entry=0x25210e0, rep=rep@entry=0x7ffca60fc350, extra=extra@entry=0, discard=discard@entry=0) at ../../src/xcb_io.c:602
#5  0x0000003012e4435a in DRI2GetBuffersWithFormat (dpy=0x25210e0, drawable=25165834, width=width@entry=0x257a258, height=height@entry=0x257a25c, attachments=0x7ffca60fc4f0, count=1, outCount=0x7ffca60fc4b0) at ../../../../src/glx/dri2.c:491
#6  0x0000003012e44697 in dri2GetBuffersWithFormat (driDrawable=<optimized out>, width=0x257a258, height=0x257a25c, attachments=<optimized out>, count=<optimized out>, out_count=0x7ffca60fc4b0, loaderPrivate=0x2b9b760) at ../../../../src/glx/dri2_glx.c:900
#7  0x00007f90b7633b6a in dri2_allocate_textures (count=<synthetic pointer>, atts=0x2b9bef0, drawable=0x2b9b840) at ../../../../../../src/gallium/state_trackers/dri/dri2.c:213
#8  0x00007f90b7633b6a in dri2_allocate_textures (ctx=0x2b47640, drawable=0x2b9b840, statts=0x2b9bef0, statts_count=2) at ../../../../../../src/gallium/state_trackers/dri/dri2.c:407
#9  0x00007f90b763048c in dri_st_framebuffer_validate (stctx=<optimized out>, stfbi=<optimized out>, statts=0x2b9bef0, count=2, out=0x7ffca60fc620) at ../../../../../../src/gallium/state_trackers/dri/dri_drawable.c:83
#10 0x00007f90b7558cde in st_framebuffer_validate (stfb=0x2b9ba90, st=st@entry=0x2b8fa20) at ../../../../src/mesa/state_tracker/st_manager.c:200
#11 0x00007f90b755a299 in st_manager_validate_framebuffers (st=st@entry=0x2b8fa20) at ../../../../src/mesa/state_tracker/st_manager.c:925
#12 0x00007f90b7512744 in st_validate_state (st=st@entry=0x2b8fa20) at ../../../../src/mesa/state_tracker/st_atom.c:189
#13 0x00007f90b7519677 in st_Clear (ctx=0x2b4fa10, mask=50) at ../../../../src/mesa/state_tracker/st_cb_clear.c:470
#14 0x000000304892925a in QSGBatchRenderer::Renderer::renderBatches() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x000000304892ec42 in QSGBatchRenderer::Renderer::render() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#16 0x000000304893a93f in QSGRenderer::renderScene(QSGBindable const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#17 0x000000304893b18b in QSGRenderer::renderScene(unsigned int) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#18 0x000000304894b68e in QSGRenderContext::renderNextFrame(QSGRenderer*, unsigned int) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#19 0x000000304899566b in QQuickWindowPrivate::renderSceneGraph(QSize const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#20 0x000000304896603b in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#21 0x0000003048967141 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#22 0x000000301d75affc in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0x2513d10, receiver=receiver@entry=0x2680b40, e=e@entry=0x7ffca60fcf10) at kernel/qapplication.cpp:3716
#23 0x000000301d7604b6 in QApplication::notify(QObject*, QEvent*) (this=0x7ffca60fd220, receiver=0x2680b40, e=0x7ffca60fcf10) at kernel/qapplication.cpp:3499
#24 0x00000030176865ab in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7ffca60fd220, receiver=0x2680b40, event=event@entry=0x7ffca60fcf10) at kernel/qcoreapplication.cpp:965
#25 0x00000030176db85d in QTimerInfoList::activateTimers() (event=0x7ffca60fcf10, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#26 0x00000030176db85d in QTimerInfoList::activateTimers() (this=0x2560da0) at kernel/qtimerinfo_unix.cpp:637
#27 0x00000030176dbd99 in idleTimerSourceDispatch(GSource*, GSourceFunc, gpointer) (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:177
#28 0x00000030176dbd99 in idleTimerSourceDispatch(GSource*, GSourceFunc, gpointer) (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:224
#29 0x000000300404a137 in g_main_context_dispatch (context=0x7f90b80016f0) at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./glib/gmain.c:3154
#30 0x000000300404a137 in g_main_context_dispatch (context=context@entry=0x7f90b80016f0) at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./glib/gmain.c:3769
#31 0x000000300404a390 in g_main_context_iterate (context=context@entry=0x7f90b80016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./glib/gmain.c:3840
#32 0x000000300404a43c in g_main_context_iteration (context=0x7f90b80016f0, may_block=may_block@entry=1) at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./glib/gmain.c:3901
#33 0x00000030176dca5b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x256b060, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#34 0x0000003017683d6a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffca60fd150, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#35 0x000000301768be0c in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1229
#36 0x0000000000407671 in main ()

Reported using DrKonqi