Bug 360697

Summary: krunner crash when attempting to start iceweasel from alt-F2
Product: [Plasma] krunner Reporter: Arthur Marsh <arthur.marsh>
Component: generalAssignee: Kai Uwe Broulik <kde>
Status: RESOLVED NOT A BUG    
Severity: crash Keywords: drkonqi
Priority: NOR Flags: kde: corner_case-
Version: 5.5.4   
Target Milestone: ---   
Platform: Debian unstable   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Arthur Marsh 2016-03-18 11:23:29 UTC 
Application: krunner (5.5.4)

Qt Version: 5.5.1
Operating System: Linux 4.5.0+ x86_64
Distribution: Debian GNU/Linux unstable (sid)

-- Information about the crash:
similarly to when I attempted to start konsole from alt-F2, krunner crashed when attempting to start iceweasel from alt-F2.

The crash can be reproduced every time.

-- 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 0x7fa3a26e97c0 (LWP 4165))]

Thread 12 (Thread 0x7fa3a2027700 (LWP 4166)):
#0  0x00000030004dfe4d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x000000300340a382 in _xcb_conn_wait (__timeout=-1, __nfds=1, __fds=0x7fa3a2026d00) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  0x000000300340a382 in _xcb_conn_wait (c=c@entry=0x1967470, cond=cond@entry=0x19674b0, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:459
#3  0x000000300340bff7 in xcb_wait_for_event (c=0x1967470) at ../../src/xcb_in.c:693
#4  0x00007fa3a2486789 in QXcbEventReader::run() (this=0x197a4c0) at qxcbconnection.cpp:1230
#5  0x00000030180a57fe in QThreadPrivate::start(void*) (arg=0x197a4c0) at thread/qthread_unix.cpp:331
#6  0x0000003000c07454 in start_thread (arg=0x7fa3a2027700) at pthread_create.c:334
#7  0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7fa398f8f700 (LWP 4167)):
#0  0x0000003000c0d04f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fa39b9b3c43 in radeon_drm_cs_emit_ioctl (mtx=0x1a5d820, cond=0x1a5d848) at ../../../../../../../include/c11/threads_posix.h:159
#2  0x00007fa39b9b3c43 in radeon_drm_cs_emit_ioctl (sema=0x1a5d820) at ../../../../../../../src/gallium/auxiliary/os/os_thread.h:259
#3  0x00007fa39b9b3c43 in radeon_drm_cs_emit_ioctl (param=param@entry=0x1a5d4d0) at ../../../../../../../src/gallium/winsys/radeon/drm/radeon_drm_winsys.c:653
#4  0x00007fa39b9b3397 in impl_thrd_routine (p=<optimized out>) at ../../../../../../../include/c11/threads_posix.h:87
#5  0x0000003000c07454 in start_thread (arg=0x7fa398f8f700) at pthread_create.c:334
#6  0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7fa3976a6700 (LWP 4169)):
#0  0x00000030004dfe4d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x000000300444a1cc in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7fa390003070, timeout=<optimized out>, context=0x7fa390000990) at /build/glib2.0-2.46.2/./glib/gmain.c:4135
#2  0x000000300444a1cc in g_main_context_iterate (context=context@entry=0x7fa390000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-2.46.2/./glib/gmain.c:3835
#3  0x000000300444a2dc in g_main_context_iteration (context=0x7fa390000990, may_block=may_block@entry=1) at /build/glib2.0-2.46.2/./glib/gmain.c:3901
#4  0x00000030182dca5b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fa3900008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x0000003018283d6a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fa3976a5de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00000030180a0854 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00000030406d5105 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00000030180a57fe in QThreadPrivate::start(void*) (arg=0x1d71260) at thread/qthread_unix.cpp:331
#9  0x0000003000c07454 in start_thread (arg=0x7fa3976a6700) at pthread_create.c:334
#10 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7fa38d3b3700 (LWP 4428)):
#0  0x0000003000c0d04f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00000030180a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x1c195d0) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030180a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x1cd43e0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fa3954a902b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0x1c9b440, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007fa3954a9ddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0x1c9b440, th=th@entry=0x20a5bf0, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007fa3954ae038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x1c643a0, th=0x20a5bf0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007fa3954a8f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x20a5bf0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007fa3954ae092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x1c643a0, th=0x20a5bf0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007fa3954a8f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x20a5bf0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007fa3954abea3 in ThreadWeaver::Thread::run() (this=0x20a5bf0) at ../../src/thread.cpp:103
#10 0x00000030180a57fe in QThreadPrivate::start(void*) (arg=0x20a5bf0) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7fa38d3b3700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fa38cbb2700 (LWP 4429)):
#0  0x0000003000c0d04f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00000030180a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x1c195d0) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030180a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x1cd43e0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fa3954a902b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0x1c9b440, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007fa3954a9ddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0x1c9b440, th=th@entry=0x25ad240, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007fa3954ae038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x1c643a0, th=0x25ad240, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007fa3954a8f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x25ad240, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007fa3954ae092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x1c643a0, th=0x25ad240, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007fa3954a8f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x25ad240, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007fa3954abea3 in ThreadWeaver::Thread::run() (this=0x25ad240) at ../../src/thread.cpp:103
#10 0x00000030180a57fe in QThreadPrivate::start(void*) (arg=0x25ad240) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7fa38cbb2700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fa387fff700 (LWP 4430)):
#0  0x0000003000c0d04f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00000030180a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x1c195d0) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030180a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x1cd43e0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fa3954a902b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0x1c9b440, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007fa3954a9ddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0x1c9b440, th=th@entry=0x7fa388002d90, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007fa3954ae038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x1c643a0, th=0x7fa388002d90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007fa3954a8f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x7fa388002d90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007fa3954ae092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x1c643a0, th=0x7fa388002d90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007fa3954a8f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x7fa388002d90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007fa3954abea3 in ThreadWeaver::Thread::run() (this=0x7fa388002d90) at ../../src/thread.cpp:103
#10 0x00000030180a57fe in QThreadPrivate::start(void*) (arg=0x7fa388002d90) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7fa387fff700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fa3877fe700 (LWP 4431)):
[KCrash Handler]
#6  0x00000030dd6039fa in  () at /usr/lib/x86_64-linux-gnu/liblmdb.so.0
#7  0x00000030dd604db4 in mdb_txn_begin () at /usr/lib/x86_64-linux-gnu/liblmdb.so.0
#8  0x00000030c182101e in  () at /usr/lib/x86_64-linux-gnu/libKF5Baloo.so.5
#9  0x00000030c180fff2 in Baloo::Query::exec() () at /usr/lib/x86_64-linux-gnu/libKF5Baloo.so.5
#10 0x00007fa38ee6bf2f in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/krunner_baloosearchrunner.so
#11 0x00007fa38ee6c879 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/krunner_baloosearchrunner.so
#12 0x00007fa3956c9f40 in Plasma::AbstractRunner::performMatch(Plasma::RunnerContext&) (this=0x25daaf0, localContext=...) at ../../src/abstractrunner.cpp:131
#13 0x00007fa3954ad7e0 in ThreadWeaver::Executor::run(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) (this=<optimized out>, job=..., thread=<optimized out>) at ../../src/executor.cpp:52
#14 0x00007fa3954ac330 in ThreadWeaver::Job::execute(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) (this=<optimized out>, self=..., th=0x25ac890) at ../../src/job.cpp:83
#15 0x00007fa3954abdda in ThreadWeaver::Thread::run() (this=0x25ac890) at ../../src/thread.cpp:114
#16 0x00000030180a57fe in QThreadPrivate::start(void*) (arg=0x25ac890) at thread/qthread_unix.cpp:331
#17 0x0000003000c07454 in start_thread (arg=0x7fa3877fe700) at pthread_create.c:334
#18 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fa386ffd700 (LWP 4432)):
#0  0x0000003000c0d04f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00000030180a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x1c195d0) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030180a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x1cd43e0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fa3954a902b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0x1c9b440, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007fa3954a9ddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0x1c9b440, th=th@entry=0x7fa380002f90, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007fa3954ae038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x1c643a0, th=0x7fa380002f90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007fa3954a8f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x7fa380002f90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007fa3954ae092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x1c643a0, th=0x7fa380002f90, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007fa3954a8f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x7fa380002f90, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007fa3954abea3 in ThreadWeaver::Thread::run() (this=0x7fa380002f90) at ../../src/thread.cpp:103
#10 0x00000030180a57fe in QThreadPrivate::start(void*) (arg=0x7fa380002f90) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7fa386ffd700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fa3867fc700 (LWP 4433)):
#0  0x0000003000c0d04f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00000030180a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x1c195d0) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030180a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x1cd43e0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fa3954a902b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0x1c9b440, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007fa3954a9ddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0x1c9b440, th=th@entry=0x25ad1a0, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007fa3954ae038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x1c643a0, th=0x25ad1a0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007fa3954a8f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x25ad1a0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007fa3954ae092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x1c643a0, th=0x25ad1a0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007fa3954a8f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x25ad1a0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007fa3954abea3 in ThreadWeaver::Thread::run() (this=0x25ad1a0) at ../../src/thread.cpp:103
#10 0x00000030180a57fe in QThreadPrivate::start(void*) (arg=0x25ad1a0) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7fa3867fc700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fa385ffb700 (LWP 4434)):
#0  0x0000003000c0d04f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00000030180a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x1c195d0) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030180a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x1cd43e0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fa3954a902b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0x1c9b440, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007fa3954a9ddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0x1c9b440, th=th@entry=0x20a0020, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007fa3954ae038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x1c643a0, th=0x20a0020, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007fa3954a8f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x20a0020, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007fa3954ae092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x1c643a0, th=0x20a0020, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007fa3954a8f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x20a0020, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007fa3954abea3 in ThreadWeaver::Thread::run() (this=0x20a0020) at ../../src/thread.cpp:103
#10 0x00000030180a57fe in QThreadPrivate::start(void*) (arg=0x20a0020) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7fa385ffb700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fa3857fa700 (LWP 4435)):
#0  0x0000003000c0d04f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00000030180a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x1c195d0) at thread/qwaitcondition_unix.cpp:136
#2  0x00000030180a6a9b in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x1cd43e0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fa3954a902b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked(ThreadWeaver::Thread*) (this=this@entry=0x1c9b440, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007fa3954a9ddf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) (this=0x1c9b440, th=th@entry=0x25ad5b0, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007fa3954ae038 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x1c643a0, th=0x25ad5b0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007fa3954a8f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x25ad5b0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007fa3954ae092 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, bool) (this=0x1c643a0, th=0x25ad5b0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007fa3954a8f8d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) (this=<optimized out>, th=0x25ad5b0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007fa3954abea3 in ThreadWeaver::Thread::run() (this=0x25ad5b0) at ../../src/thread.cpp:103
#10 0x00000030180a57fe in QThreadPrivate::start(void*) (arg=0x25ad5b0) at thread/qthread_unix.cpp:331
#11 0x0000003000c07454 in start_thread (arg=0x7fa3857fa700) at pthread_create.c:334
#12 0x00000030004e8edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fa3a26e97c0 (LWP 4165)):
#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=0x1967470, cond=cond@entry=0x7fff3a824da0, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:427
#2  0x000000300340bd37 in wait_for_reply (c=c@entry=0x1967470, request=1370, e=e@entry=0x7fff3a824e70) at ../../src/xcb_in.c:516
#3  0x000000300340be41 in xcb_wait_for_reply (c=c@entry=0x1967470, request=1370, e=e@entry=0x7fff3a824e70) at ../../src/xcb_in.c:546
#4  0x0000003003843317 in _XReply (dpy=dpy@entry=0x19660e0, rep=rep@entry=0x7fff3a824ef0, extra=extra@entry=0, discard=discard@entry=0) at ../../src/xcb_io.c:602
#5  0x000000301044435a in DRI2GetBuffersWithFormat (dpy=0x19660e0, drawable=67108874, width=width@entry=0x1f79e38, height=height@entry=0x1f79e3c, attachments=0x7fff3a825090, count=1, outCount=0x7fff3a825050) at ../../../../src/glx/dri2.c:491
#6  0x0000003010444697 in dri2GetBuffersWithFormat (driDrawable=<optimized out>, width=0x1f79e38, height=0x1f79e3c, attachments=<optimized out>, count=<optimized out>, out_count=0x7fff3a825050, loaderPrivate=0x1fe4230) at ../../../../src/glx/dri2_glx.c:900
#7  0x00007fa39b633b6a in dri2_allocate_textures (count=<synthetic pointer>, atts=0x1fe49c0, drawable=0x1fe4310) at ../../../../../../src/gallium/state_trackers/dri/dri2.c:213
#8  0x00007fa39b633b6a in dri2_allocate_textures (ctx=0x1f81be0, drawable=0x1fe4310, statts=0x1fe49c0, statts_count=2) at ../../../../../../src/gallium/state_trackers/dri/dri2.c:407
#9  0x00007fa39b63048c in dri_st_framebuffer_validate (stctx=<optimized out>, stfbi=<optimized out>, statts=0x1fe49c0, count=2, out=0x7fff3a8251c0) at ../../../../../../src/gallium/state_trackers/dri/dri_drawable.c:83
#10 0x00007fa39b558cde in st_framebuffer_validate (stfb=0x1fe4560, st=st@entry=0x1fd85b0) at ../../../../src/mesa/state_tracker/st_manager.c:200
#11 0x00007fa39b55a299 in st_manager_validate_framebuffers (st=st@entry=0x1fd85b0) at ../../../../src/mesa/state_tracker/st_manager.c:925
#12 0x00007fa39b512744 in st_validate_state (st=st@entry=0x1fd85b0) at ../../../../src/mesa/state_tracker/st_atom.c:189
#13 0x00007fa39b519677 in st_Clear (ctx=0x1f955c0, mask=50) at ../../../../src/mesa/state_tracker/st_cb_clear.c:470
#14 0x000000304112925a in QSGBatchRenderer::Renderer::renderBatches() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x000000304112ec42 in QSGBatchRenderer::Renderer::render() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#16 0x000000304113a93f in QSGRenderer::renderScene(QSGBindable const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#17 0x000000304113b18b in QSGRenderer::renderScene(unsigned int) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#18 0x000000304114b68e in QSGRenderContext::renderNextFrame(QSGRenderer*, unsigned int) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#19 0x000000304119566b in QQuickWindowPrivate::renderSceneGraph(QSize const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#20 0x000000304116603b in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#21 0x0000003041167141 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#22 0x000000301db5affc in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0x1958d10, receiver=receiver@entry=0x1ac5500, e=e@entry=0x7fff3a825ab0) at kernel/qapplication.cpp:3716
#23 0x000000301db604b6 in QApplication::notify(QObject*, QEvent*) (this=0x7fff3a825dc0, receiver=0x1ac5500, e=0x7fff3a825ab0) at kernel/qapplication.cpp:3499
#24 0x00000030182865ab in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7fff3a825dc0, receiver=0x1ac5500, event=event@entry=0x7fff3a825ab0) at kernel/qcoreapplication.cpp:965
#25 0x00000030182db85d in QTimerInfoList::activateTimers() (event=0x7fff3a825ab0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#26 0x00000030182db85d in QTimerInfoList::activateTimers() (this=0x19a6610) at kernel/qtimerinfo_unix.cpp:637
#27 0x00000030182dbd99 in idleTimerSourceDispatch(GSource*, GSourceFunc, gpointer) (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:177
#28 0x00000030182dbd99 in idleTimerSourceDispatch(GSource*, GSourceFunc, gpointer) (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:224
#29 0x0000003004449fd7 in g_main_context_dispatch (context=0x7fa39c0016f0) at /build/glib2.0-2.46.2/./glib/gmain.c:3154
#30 0x0000003004449fd7 in g_main_context_dispatch (context=context@entry=0x7fa39c0016f0) at /build/glib2.0-2.46.2/./glib/gmain.c:3769
#31 0x000000300444a230 in g_main_context_iterate (context=context@entry=0x7fa39c0016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-2.46.2/./glib/gmain.c:3840
#32 0x000000300444a2dc in g_main_context_iteration (context=0x7fa39c0016f0, may_block=may_block@entry=1) at /build/glib2.0-2.46.2/./glib/gmain.c:3901
#33 0x00000030182dca5b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x19a64b0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#34 0x0000003018283d6a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fff3a825cf0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#35 0x000000301828be0c in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1229
#36 0x0000000000407671 in main ()

Reported using DrKonqi