Bug 389170

Application: plasmashell (5.11.5)

Qt Version: 5.9.3
Frameworks Version: 5.42.0
Operating System: Linux 4.13.0-26-generic x86_64
Distribution: KDE neon User Edition 5.11

-- Information about the crash:
- What I was doing when the application crashed: Perusing my browser Firefox ESR (52.5.3 - 64 bits), had just scrolled the page I was watching down when the crash happened. Just before that I had opened a few pages using links on that page and closed them again. The only application I was using at the same time was the Nuvola player (listening to Deezer, nothing more). 

- Unusual behavior I noticed: screen flickering, redshift control switching on and off.

The crash does not seem to be reproducible.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fabdcce48c0 (LWP 1656))]

Thread 10 (Thread 0x7faaf3e8b700 (LWP 2419)):
#0  0x00007fabd63aa74d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fabd126d38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fabd126d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fabd6cd16cb in QEventDispatcherGlib::processEvents (this=0x7faaec0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fabd6c79e2a in QEventLoop::exec (this=this@entry=0x7faaf3e8acc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007fabd6aa28f4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#6  0x00007faaf50a2517 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007fabd6aa7709 in QThreadPrivate::start (arg=0x5253f40) at thread/qthread_unix.cpp:368
#8  0x00007fabd594e6ba in start_thread (arg=0x7faaf3e8b700) at pthread_create.c:333
#9  0x00007fabd63b641d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7fab04544700 (LWP 2027)):
#0  0x00007fabd63aa74d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fabd126d38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fabd126d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fabd6cd16cb in QEventDispatcherGlib::processEvents (this=0x7faafc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fabd6c79e2a in QEventLoop::exec (this=this@entry=0x7fab04543d00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007fabd6aa28f4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#6  0x00007fabd6aa7709 in QThreadPrivate::start (arg=0x4acbc90) at thread/qthread_unix.cpp:368
#7  0x00007fabd594e6ba in start_thread (arg=0x7fab04544700) at pthread_create.c:333
#8  0x00007fabd63b641d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fab1d783700 (LWP 1959)):
#0  0x00007fabd12b1a79 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fabd126cdcc in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fabd126d330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fabd126d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fabd6cd16cb in QEventDispatcherGlib::processEvents (this=0x7fab180008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007fabd6c79e2a in QEventLoop::exec (this=this@entry=0x7fab1d782c90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007fabd6aa28f4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#7  0x00007fabda79a046 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007fabd6aa7709 in QThreadPrivate::start (arg=0x2898d60) at thread/qthread_unix.cpp:368
#9  0x00007fabd594e6ba in start_thread (arg=0x7fab1d783700) at pthread_create.c:333
#10 0x00007fabd63b641d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fababfff700 (LWP 1781)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fabdc458d04 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007fabdc458d49 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007fabd594e6ba in start_thread (arg=0x7fababfff700) at pthread_create.c:333
#4  0x00007fabd63b641d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fabb5925700 (LWP 1778)):
#0  0x00007fabd12b1a94 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fabd126d381 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fabd126d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fabd6cd16cb in QEventDispatcherGlib::processEvents (this=0x7faba40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fabd6c79e2a in QEventLoop::exec (this=this@entry=0x7fabb5924d00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007fabd6aa28f4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#6  0x00007fabd6aa7709 in QThreadPrivate::start (arg=0x23609f0) at thread/qthread_unix.cpp:368
#7  0x00007fabd594e6ba in start_thread (arg=0x7fabb5925700) at pthread_create.c:333
#8  0x00007fabd63b641d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fabb7fff700 (LWP 1773)):
#0  0x00007fabd63aa74d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fabd126d38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fabd126d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fabd6cd16cb in QEventDispatcherGlib::processEvents (this=0x7fabac0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fabd6c79e2a in QEventLoop::exec (this=this@entry=0x7fabb7ffece0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007fabd6aa28f4 in QThread::exec (this=this@entry=0x216d8f0) at thread/qthread.cpp:515
#6  0x00007fabd9bf9d25 in QQmlThreadPrivate::run (this=0x216d8f0) at qml/ftw/qqmlthread.cpp:147
#7  0x00007fabd6aa7709 in QThreadPrivate::start (arg=0x216d8f0) at thread/qthread_unix.cpp:368
#8  0x00007fabd594e6ba in start_thread (arg=0x7fabb7fff700) at pthread_create.c:333
#9  0x00007fabd63b641d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fabbe5ba700 (LWP 1717)):
#0  0x00007fabd63aa74d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fabd126d38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fabd126d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fabd6cd16cb in QEventDispatcherGlib::processEvents (this=0x7fabb00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fabd6c79e2a in QEventLoop::exec (this=this@entry=0x7fabbe5b9ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007fabd6aa28f4 in QThread::exec (this=this@entry=0x2087fe0) at thread/qthread.cpp:515
#6  0x00007fabd9bf9d25 in QQmlThreadPrivate::run (this=0x2087fe0) at qml/ftw/qqmlthread.cpp:147
#7  0x00007fabd6aa7709 in QThreadPrivate::start (arg=0x2087fe0) at thread/qthread_unix.cpp:368
#8  0x00007fabd594e6ba in start_thread (arg=0x7fabbe5ba700) at pthread_create.c:333
#9  0x00007fabd63b641d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fabbffff700 (LWP 1691)):
#0  0x00007fabd63a627d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fabd12b06f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fabd126ce74 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fabd126d330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fabd126d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fabd6cd16cb in QEventDispatcherGlib::processEvents (this=0x7fabb80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007fabd6c79e2a in QEventLoop::exec (this=this@entry=0x7fabbfffecd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#7  0x00007fabd6aa28f4 in QThread::exec (this=this@entry=0x7fabd73c4d40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:515
#8  0x00007fabd7150315 in QDBusConnectionManager::run (this=0x7fabd73c4d40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#9  0x00007fabd6aa7709 in QThreadPrivate::start (arg=0x7fabd73c4d40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:368
#10 0x00007fabd594e6ba in start_thread (arg=0x7fabbffff700) at pthread_create.c:333
#11 0x00007fabd63b641d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fabc6305700 (LWP 1671)):
#0  0x00007fabd63aa74d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fabdb3a1c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fabdb3a38d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fabc844a1f9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fabd6aa7709 in QThreadPrivate::start (arg=0x1fbce00) at thread/qthread_unix.cpp:368
#5  0x00007fabd594e6ba in start_thread (arg=0x7fabc6305700) at pthread_create.c:333
#6  0x00007fabd63b641d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fabdcce48c0 (LWP 1656)):
[KCrash Handler]
#6  QV4::Chunk::testBit (index=0, bitmap=0x100) at ../../include/QtQml/5.9.3/QtQml/private/../../../../../src/qml/memory/qv4mmdefs_p.h:135
#7  QV4::Heap::Base::isMarked (this=0x0) at ../../include/QtQml/5.9.3/QtQml/private/../../../../../src/qml/memory/qv4heap_p.h:109
#8  QV4::Heap::Base::mark (engine=0x216ddd0, this=0x0) at jsruntime/qv4engine_p.h:525
#9  QV4::String::markObjects (that=<optimized out>, e=0x216ddd0) at jsruntime/qv4string.cpp:62
#10 0x00007fabd9aae82d in drainMarkStack (markBase=0x7fabb6c00428, engine=0x216ddd0) at jsruntime/qv4engine.cpp:934
#11 QV4::ExecutionEngine::markObjects (this=0x216ddd0) at jsruntime/qv4engine.cpp:957
#12 0x00007fabd99c842b in QV4::MemoryManager::mark (this=this@entry=0x21736d0) at memory/qv4mm.cpp:813
#13 0x00007fabd99c8b25 in QV4::MemoryManager::runGC (this=this@entry=0x21736d0) at memory/qv4mm.cpp:952
#14 0x00007fabd99ca8f0 in QV4::MemoryManager::allocString (this=this@entry=0x21736d0, unmanagedSize=<optimized out>) at memory/qv4mm.cpp:716
#15 0x00007fabd9aac58d in QV4::MemoryManager::allocWithStringData<QV4::String, QString> (arg1=..., unmanagedSize=<optimized out>, this=0x21736d0) at ../../include/QtQml/5.9.3/QtQml/private/../../../../../src/qml/memory/qv4mm_p.h:261
#16 QV4::ExecutionEngine::newString (this=this@entry=0x216ddd0, s=...) at jsruntime/qv4engine.cpp:559
#17 0x00007fabd9aaf1e9 in objectFromVariantMap (map=..., e=0x216ddd0) at jsruntime/qv4engine.cpp:1302
#18 QV4::ExecutionEngine::fromVariant (this=this@entry=0x216ddd0, variant=...) at jsruntime/qv4engine.cpp:1376
#19 0x00007fabd9b2f7c9 in loadProperty (v4=0x216ddd0, object=0x467f220, property=...) at jsruntime/qv4qobjectwrapper.cpp:193
#20 0x00007fabd9b30786 in QV4::QObjectWrapper::getQmlProperty (this=0x7fabb6c003e8, qmlContext=0x467d280, name=0x7fabb6c003f0, revisionMode=QV4::QObjectWrapper::IgnoreRevision, hasProperty=0x0, includeImports=<optimized out>) at jsruntime/qv4qobjectwrapper.cpp:279
#21 0x00007fabd9b46e49 in QV4::Object::get (hasProperty=0x0, name=<optimized out>, this=<optimized out>) at jsruntime/qv4object_p.h:344
#22 QV4::getElementFallback (engine=0x216ddd0, object=..., index=...) at jsruntime/qv4runtime.cpp:656
#23 0x00007fab0fa61312 in ?? ()
#24 0x00007ffe2a5af780 in ?? ()
#25 0x00007fabb6c00320 in ?? ()
#26 0x0000000000000010 in ?? ()
#27 0xbca4a65e00000029 in ?? ()
#28 0x000000000217c680 in ?? ()
#29 0x0000000004671af0 in ?? ()
#30 0x00007ffe2a5af850 in ?? ()
#31 0x00007fabb6c00370 in ?? ()
#32 0x000000000216ddd0 in ?? ()
#33 0x00007ffe2a5afa30 in ?? ()
#34 0x000000000216ddd0 in ?? ()
#35 0x00007fabd9abbbcb in QV4::ExecutionContext::simpleCall (this=<optimized out>, scope=..., callData=callData@entry=0x7fabb6c00328, function=0x4671af0) at jsruntime/qv4context.cpp:347
#36 0x00007fabd9bdb0ff in QQmlJavaScriptExpression::evaluate (this=this@entry=0x4689f50, callData=0x7fabb6c00328, isUndefined=isUndefined@entry=0x7ffe2a5af97f, scope=...) at qml/qqmljavascriptexpression.cpp:223
#37 0x00007fabd9be5668 in QQmlNonbindingBinding::doUpdate (this=0x4689f50, watcher=..., flags=..., scope=...) at qml/qqmlbinding.cpp:206
#38 0x00007fabd9be27c3 in QQmlBinding::update (this=0x4689f50, flags=..., flags@entry=...) at qml/qqmlbinding.cpp:167
#39 0x00007fabd9be2a0e in QQmlBinding::refresh (this=<optimized out>) at qml/qqmlbinding.cpp:439
#40 0x00007fabd9bb79c7 in QQmlNotifier::emitNotify (endpoint=<optimized out>, a=a@entry=0x0) at qml/qqmlnotifier.cpp:106
#41 0x00007fabd9b571e4 in QQmlData::signalEmitted (object=0x467f220, index=4, a=0x0) at qml/qqmlengine.cpp:843
#42 0x00007fabd6ca897e in QMetaObject::activate (sender=0x467f220, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=argv@entry=0x0) at kernel/qobject.cpp:3644
#43 0x00007fabd6ca8b87 in QMetaObject::activate (sender=<optimized out>, m=<optimized out>, local_signal_index=<optimized out>, argv=argv@entry=0x0) at kernel/qobject.cpp:3628
#44 0x00007fabd6ca8be3 in QMetaObject::activate (sender=<optimized out>, signal_index=<optimized out>, argv=argv@entry=0x0) at kernel/qobject.cpp:3815
#45 0x00007fabd9b4d8a7 in QQmlOpenMetaObject::setValue (this=<optimized out>, name=..., val=...) at qml/qqmlopenmetaobject.cpp:356
#46 0x00007fabd99c67e7 in QQmlPropertyMap::insert (this=<optimized out>, key=..., value=...) at util/qqmlpropertymap.cpp:232
#47 0x00007fab227585a2 in Plasma::DataSource::dataUpdated (this=0x467eb20, sourceName=..., data=...) at /workspace/build/src/declarativeimports/core/datasource.cpp:175
#48 0x00007fab2276e62d in Plasma::DataSource::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /workspace/build/obj-x86_64-linux-gnu/src/declarativeimports/core/moc_datasource.cpp:195
#49 0x00007fabd6ca8279 in QMetaObject::activate (sender=sender@entry=0x4684a20, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe2a5b1800) at kernel/qobject.cpp:3766
#50 0x00007fabd6ca8b87 in QMetaObject::activate (sender=sender@entry=0x4684a20, m=m@entry=0x7fabdb186380 <Plasma::DataContainer::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe2a5b1800) at kernel/qobject.cpp:3628
#51 0x00007fabdaf21bd7 in Plasma::DataContainer::dataUpdated (this=this@entry=0x4684a20, _t1=..., _t2=...) at /workspace/build/obj-x86_64-linux-gnu/src/plasma/moc_datacontainer.cpp:231
#52 0x00007fabdaf23620 in Plasma::DataContainer::checkForUpdate (this=this@entry=0x4684a20) at /workspace/build/src/plasma/datacontainer.cpp:355
#53 0x00007fab0f7f463b in Multiplexer::playerUpdated (this=0x4684a20, name=..., newData=...) at /workspace/build/dataengines/mpris2/multiplexer.cpp:158
#54 0x00007fabd6ca85a6 in QtPrivate::QSlotObjectBase::call (a=0x7ffe2a5b1ab0, r=0x4684a20, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:101
#55 QMetaObject::activate (sender=sender@entry=0x24a45d0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe2a5b1ab0) at kernel/qobject.cpp:3749
#56 0x00007fabd6ca8b87 in QMetaObject::activate (sender=sender@entry=0x24a45d0, m=m@entry=0x7fabdb186380 <Plasma::DataContainer::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe2a5b1ab0) at kernel/qobject.cpp:3628
#57 0x00007fabdaf21bd7 in Plasma::DataContainer::dataUpdated (this=this@entry=0x24a45d0, _t1=..., _t2=...) at /workspace/build/obj-x86_64-linux-gnu/src/plasma/moc_datacontainer.cpp:231
#58 0x00007fabdaf23620 in Plasma::DataContainer::checkForUpdate (this=this@entry=0x24a45d0) at /workspace/build/src/plasma/datacontainer.cpp:355
#59 0x00007fab0f7fbda7 in PlayerContainer::seeked (this=0x24a45d0, position=<optimized out>) at /workspace/build/dataengines/mpris2/playercontainer.cpp:398
#60 0x00007fabd6ca85a6 in QtPrivate::QSlotObjectBase::call (a=0x7ffe2a5b1d10, r=0x24a45d0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:101
#61 QMetaObject::activate (sender=sender@entry=0x69e9b70, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe2a5b1d10) at kernel/qobject.cpp:3749
#62 0x00007fabd6ca8b87 in QMetaObject::activate (sender=sender@entry=0x69e9b70, m=m@entry=0x7fab0fa106a0 <OrgMprisMediaPlayer2PlayerInterface::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe2a5b1d10) at kernel/qobject.cpp:3628
#63 0x00007fab0f8032b2 in OrgMprisMediaPlayer2PlayerInterface::Seeked (_t1=410000000, this=0x69e9b70) at /workspace/build/obj-x86_64-linux-gnu/dataengines/mpris2/mprisplayer.moc:274
#64 OrgMprisMediaPlayer2PlayerInterface::qt_static_metacall (_o=_o@entry=0x69e9b70, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=0, _a=_a@entry=0x7ffe2a5b1e80) at /workspace/build/obj-x86_64-linux-gnu/dataengines/mpris2/mprisplayer.moc:147
#65 0x00007fab0f803770 in OrgMprisMediaPlayer2PlayerInterface::qt_metacall (this=0x69e9b70, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x7ffe2a5b1e80) at /workspace/build/obj-x86_64-linux-gnu/dataengines/mpris2/mprisplayer.moc:243
#66 0x00007fabd715c683 in QDBusConnectionPrivate::deliverCall (this=<optimized out>, object=<optimized out>, msg=..., metaTypes=..., slotIdx=<optimized out>) at qdbusintegrator.cpp:998
#67 0x00007fabd6ca92b9 in QObject::event (this=0x69e9b70, e=<optimized out>) at kernel/qobject.cpp:1246
#68 0x00007fabd7c64b9c in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x69e9b70, e=0x7fabb801f6e0) at kernel/qapplication.cpp:3722
#69 0x00007fabd7c6c5a7 in QApplication::notify (this=0x7ffe2a5b2580, receiver=0x69e9b70, e=0x7fabb801f6e0) at kernel/qapplication.cpp:3481
#70 0x00007fabd6c7bdf8 in QCoreApplication::notifyInternal2 (receiver=0x69e9b70, event=event@entry=0x7fabb801f6e0) at kernel/qcoreapplication.cpp:1018
#71 0x00007fabd6c7e5db in QCoreApplication::sendEvent (event=0x7fabb801f6e0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:233
#72 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1f99b90) at kernel/qcoreapplication.cpp:1678
#73 0x00007fabd6c7ea48 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1532
#74 0x00007fabd6cd20a3 in postEventSourceDispatch (s=0x1ff2e40) at kernel/qeventdispatcher_glib.cpp:276
#75 0x00007fabd126d197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#76 0x00007fabd126d3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#77 0x00007fabd126d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#78 0x00007fabd6cd16af in QEventDispatcherGlib::processEvents (this=0x1feac30, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#79 0x00007fabd6c79e2a in QEventLoop::exec (this=this@entry=0x7ffe2a5b2440, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#80 0x00007fabd6c82d64 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1291
#81 0x000000000041cf5b in main (argc=1, argv=<optimized out>) at /workspace/build/shell/main.cpp:167

Reported using DrKonqi