Plasma Desktop crashed after some time, when u have open Spotify, Dropbox client and Kadu.

Reproducible: Sometimes

Steps to Reproduce:
1.Open Kadu.
2.Open Spotify Client.
3.Open Some other app - example web browser. Wait for crash. 
Actual Results:  
Plasma Desktop Crash. Black screen on desktop with bug report creator.


Application: plasma-desktop (0.4)
KDE Platform Version: 4.10.2
Qt Version: 4.8.4
Operating System: Linux 3.8.7-ext73-f1-23.5-i7-ags-cfs x86_64
Distribution: Ubuntu Raring Ringtail (development branch)

Application: Powłoka pulpitu Plazmy (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f41806c27c0 (LWP 2424))]

Thread 5 (Thread 0x7f41602ff700 (LWP 2428)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f41793f4e77 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f41793f4ea9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f4173aeff8e in start_thread (arg=0x7f41602ff700) at pthread_create.c:311
#4  0x00007f417ffb1e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 4 (Thread 0x7f4157c62700 (LWP 2429)):
#0  0x00007f417ffa3b0d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f417342b6cf in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f41733ecd3c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f41733ed175 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f41733ed304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f417cb91036 in QEventDispatcherGlib::processEvents (this=0x7f41500008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f417cb6138f in QEventLoop::processEvents (this=this@entry=0x7f4157c61d90, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f417cb61618 in QEventLoop::exec (this=this@entry=0x7f4157c61d90, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f417ca63410 in QThread::exec (this=this@entry=0x18a72c0) at thread/qthread.cpp:542
#9  0x00007f417cb42edf in QInotifyFileSystemWatcherEngine::run (this=0x18a72c0) at io/qfilesystemwatcher_inotify.cpp:256
#10 0x00007f417ca65bec in QThreadPrivate::start (arg=0x18a72c0) at thread/qthread_unix.cpp:338
#11 0x00007f4173aeff8e in start_thread (arg=0x7f4157c62700) at pthread_create.c:311
#12 0x00007f417ffb1e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7f414fb71700 (LWP 2432)):
#0  0x00007f417342c608 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f41733ed1d1 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f41733ed304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f417cb91036 in QEventDispatcherGlib::processEvents (this=0x7f41440008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f417cb6138f in QEventLoop::processEvents (this=this@entry=0x7f414fb70d90, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f417cb61618 in QEventLoop::exec (this=this@entry=0x7f414fb70d90, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f417ca63410 in QThread::exec (this=this@entry=0x1e3dfb0) at thread/qthread.cpp:542
#7  0x00007f417cb42edf in QInotifyFileSystemWatcherEngine::run (this=0x1e3dfb0) at io/qfilesystemwatcher_inotify.cpp:256
#8  0x00007f417ca65bec in QThreadPrivate::start (arg=0x1e3dfb0) at thread/qthread_unix.cpp:338
#9  0x00007f4173aeff8e in start_thread (arg=0x7f414fb71700) at pthread_create.c:311
#10 0x00007f417ffb1e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7f4141506700 (LWP 2438)):
#0  0x00007f417ffa3b0d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f417342b6cf in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f41733ecd3c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f41733ed175 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f41733ed304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f417cb91036 in QEventDispatcherGlib::processEvents (this=0x7f41380008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f417cb6138f in QEventLoop::processEvents (this=this@entry=0x7f4141505d80, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f417cb61618 in QEventLoop::exec (this=this@entry=0x7f4141505d80, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f417ca63410 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#9  0x00007f41434436e5 in KCupsConnection::run() () from /usr/lib/libkcupslib.so
#10 0x00007f417ca65bec in QThreadPrivate::start (arg=0x27898e0) at thread/qthread_unix.cpp:338
#11 0x00007f4173aeff8e in start_thread (arg=0x7f4141506700) at pthread_create.c:311
#12 0x00007f417ffb1e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7f41806c27c0 (LWP 2424)):
[KCrash Handler]
#6  0x00007f417cb7647e in QMetaObject::addGuard (ptr=ptr@entry=0x7ffff090af60) at kernel/qobject.cpp:400
#7  0x00007f417e77a97e in QPointer (p=..., this=0x7ffff090af60) at ../../include/QtCore/../../src/corelib/kernel/qpointer.h:62
#8  takeAt (i=5, this=0x37994d8) at ../../include/QtCore/../../src/corelib/tools/qlist.h:486
#9  QDeclarativeRepeater::itemsRemoved (this=0x3799220, index=5, count=<optimized out>) at graphicsitems/qdeclarativerepeater.cpp:407
#10 0x00007f417cb770ef in QMetaObject::activate (sender=sender@entry=0x3799af0, m=m@entry=0x7f417eba7080 <QDeclarativeVisualModel::staticMetaObject>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7ffff090b0e0) at kernel/qobject.cpp:3539
#11 0x00007f417e8c033f in QDeclarativeVisualModel::itemsRemoved (this=this@entry=0x3799af0, _t1=_t1@entry=5, _t2=_t2@entry=1) at .moc/release-shared/moc_qdeclarativevisualitemmodel_p.cpp:161
#12 0x00007f417e7912bc in QDeclarativeVisualDataModel::_q_itemsRemoved (this=0x3799af0, index=5, count=1) at graphicsitems/qdeclarativevisualitemmodel.cpp:1314
#13 0x00007f417e8c0791 in QDeclarativeVisualDataModel::qt_static_metacall (_o=0x7ffff090af60, _c=QMetaObject::QueryPropertyScriptable, _id=15099744, _a=0x1) at .moc/release-shared/moc_qdeclarativevisualitemmodel_p.cpp:401
#14 0x00007f417cb770ef in QMetaObject::activate (sender=sender@entry=0x26549c0, m=m@entry=0x7f417eba1880 <QListModelInterface::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffff090b320) at kernel/qobject.cpp:3539
#15 0x00007f417e8b4ebf in QListModelInterface::itemsRemoved (this=this@entry=0x26549c0, _t1=_t1@entry=5, _t2=_t2@entry=1) at .moc/release-shared/moc_qlistmodelinterface_p.cpp:114
#16 0x00007f417e6fc18f in QDeclarativeListModel::remove (this=0x26549c0, index=5) at util/qdeclarativelistmodel.cpp:402
#17 0x00007f417e8b3a2b in QDeclarativeListModel::qt_static_metacall (_o=0x7ffff090af60, _o@entry=0x26549c0, _c=QMetaObject::QueryPropertyScriptable, _c@entry=QMetaObject::InvokeMetaMethod, _id=15099744, _id@entry=2, _a=0x1, _a@entry=0x7ffff090b5b0) at .moc/release-shared/moc_qdeclarativelistmodel_p.cpp:76
#18 0x00007f417e8b3b8f in QDeclarativeListModel::qt_metacall (this=0x26549c0, _c=QMetaObject::InvokeMetaMethod, _id=2, _a=0x7ffff090b5b0) at .moc/release-shared/moc_qdeclarativelistmodel_p.cpp:123
#19 0x00007f417e85e078 in QDeclarativeObjectMethodScriptClass::callMethod (this=this@entry=0x21d0900, object=object@entry=0x26549c0, index=10, returnType=<optimized out>, argCount=<optimized out>, argTypes=0x7ffff090b870, ctxt=ctxt@entry=0x7f414c9ba2a8) at qml/qdeclarativeobjectscriptclass.cpp:970
#20 0x00007f417e85fce6 in QDeclarativeObjectMethodScriptClass::callPrecise (this=0x21d0900, object=0x26549c0, data=..., ctxt=0x7f414c9ba2a8) at qml/qdeclarativeobjectscriptclass.cpp:944
#21 0x00007f417e86060b in QDeclarativeObjectMethodScriptClass::call (this=<optimized out>, o=<optimized out>, ctxt=<optimized out>) at qml/qdeclarativeobjectscriptclass.cpp:917
#22 0x00007f417946b203 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#23 0x00007f41793673a0 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#24 0x00007f4179344436 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#25 0x00007f41400ecfb8 in ?? ()
#26 0x7fffffff00000001 in ?? ()
#27 0x00007f41554b6640 in ?? ()
#28 0x00007f410000000b in ?? ()
#29 0x0000000000000002 in ?? ()
#30 0x00007f414c4ba058 in ?? ()
#31 0x00007f415542d510 in ?? ()
#32 0x00007f414ce0bcb8 in ?? ()
#33 0x00007f41372db910 in ?? ()
#34 0x00007f41553dcc00 in ?? ()
#35 0x00007f41400ecd80 in ?? ()
#36 0x00007f414ce0bcd0 in ?? ()
#37 0x00007f414c9ba2a8 in ?? ()
#38 0x00007f414ce46a88 in ?? ()
#39 0x00007f41796edd98 in __bss_start () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#40 0x00007f414ce45800 in ?? ()
#41 0x00007f414c9ba208 in ?? ()
#42 0x00007f41553d7540 in ?? ()
#43 0x00007f41796edd98 in __bss_start () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#44 0x00007f414c9ba208 in ?? ()
#45 0x00007f414c9ba250 in ?? ()
#46 0x00007f414ce0bcb8 in ?? ()
#47 0x00007f4179302979 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#48 0x00007f4179393587 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#49 0x00007f41793673cf in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#50 0x00007f417944e40e in QScriptValue::call(QScriptValue const&, QList<QScriptValue> const&) () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#51 0x00007f417e7c8e95 in QDeclarativeQtScriptExpression::eval (this=this@entry=0x4542b58, secondaryScope=<optimized out>, isUndefined=0x0) at qml/qdeclarativeexpression.cpp:518
#52 0x00007f417e7cb311 in QDeclarativeQtScriptExpression::scriptValue (this=this@entry=0x4542b58, secondaryScope=secondaryScope@entry=0x0, isUndefined=isUndefined@entry=0x0) at qml/qdeclarativeexpression.cpp:470
#53 0x00007f417e7cb62e in QDeclarativeExpressionPrivate::scriptValue (this=this@entry=0x4542ad0, secondaryScope=secondaryScope@entry=0x0, isUndefined=isUndefined@entry=0x0) at qml/qdeclarativeexpression.cpp:653
#54 0x00007f417e7cb7c2 in QDeclarativeExpressionPrivate::value (this=0x4542ad0, secondaryScope=0x0, isUndefined=isUndefined@entry=0x0) at qml/qdeclarativeexpression.cpp:667
#55 0x00007f417e803133 in QDeclarativeBoundSignal::qt_metacall (this=0x43b55f0, c=<optimized out>, id=<optimized out>, a=0x7ffff090c010) at qml/qdeclarativeboundsignal.cpp:199
#56 0x00007f417cb772b3 in QMetaObject::activate (sender=0x47f1580, m=m@entry=0x7f417eba1260 <QDeclarativeTimer::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3558
#57 0x00007f417e8b3e60 in QDeclarativeTimer::triggered (this=<optimized out>) at .moc/release-shared/moc_qdeclarativetimer_p.cpp:176
#58 0x00007f417e706c8d in QDeclarativeTimer::finished (this=0x47f1580) at util/qdeclarativetimer.cpp:318
#59 0x00007f417cb770ef in QMetaObject::activate (sender=sender@entry=0x47f16c0, m=m@entry=0x7f417ceb7cc0 <QAbstractAnimation::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3539
#60 0x00007f417ca48950 in QAbstractAnimation::finished (this=this@entry=0x47f16c0) at .moc/release-shared/moc_qabstractanimation.cpp:190
#61 0x00007f417ca491e8 in QAbstractAnimationPrivate::setState (this=0x47f16e0, newState=newState@entry=QAbstractAnimation::Stopped) at animation/qabstractanimation.cpp:604
#62 0x00007f417ca492f7 in QAbstractAnimation::stop (this=this@entry=0x47f16c0) at animation/qabstractanimation.cpp:958
#63 0x00007f417ca49443 in QAbstractAnimation::setCurrentTime (this=this@entry=0x47f16c0, msecs=<optimized out>) at animation/qabstractanimation.cpp:912
#64 0x00007f417ca49604 in updateAnimationsTime (this=0x10eaad0) at animation/qabstractanimation.cpp:235
#65 QUnifiedTimer::updateAnimationsTime (this=0x10eaad0) at animation/qabstractanimation.cpp:207
#66 0x00007f417ca490fa in QAbstractAnimationPrivate::setState (this=0x4965010, newState=newState@entry=QAbstractAnimation::Running) at animation/qabstractanimation.cpp:588
#67 0x00007f417ca49690 in QAbstractAnimation::start (this=this@entry=0x4964ff0, policy=policy@entry=QAbstractAnimation::KeepWhenStopped) at animation/qabstractanimation.cpp:938
#68 0x00007f417e706928 in QDeclarativeTimer::update (this=0x4964eb0) at util/qdeclarativetimer.cpp:279
#69 0x00007f417e7d5873 in QDeclarativeComponentPrivate::complete (enginePriv=0x21ddf60, state=0x37999d8) at qml/qdeclarativecomponent.cpp:962
#70 0x00007f417e7d5eab in completeCreate (this=<optimized out>) at qml/qdeclarativecomponent.cpp:1043
#71 QDeclarativeComponentPrivate::completeCreate (this=<optimized out>) at qml/qdeclarativecomponent.cpp:1039
#72 0x00007f417e7922d8 in QDeclarativeVisualDataModel::item (this=0x3799af0, index=0, viewId=..., complete=complete@entry=true) at graphicsitems/qdeclarativevisualitemmodel.cpp:1069
#73 0x00007f417e79287b in QDeclarativeVisualDataModel::item (this=<optimized out>, index=0, complete=<optimized out>) at graphicsitems/qdeclarativevisualitemmodel.cpp:958
#74 0x00007f417e77a774 in QDeclarativeRepeater::itemsInserted (this=0x3799220, index=<optimized out>, count=<optimized out>) at graphicsitems/qdeclarativerepeater.cpp:386
#75 0x00007f417cb770ef in QMetaObject::activate (sender=sender@entry=0x3799af0, m=m@entry=0x7f417eba7080 <QDeclarativeVisualModel::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffff090c7c0) at kernel/qobject.cpp:3539
#76 0x00007f417e8c02ef in QDeclarativeVisualModel::itemsInserted (this=this@entry=0x3799af0, _t1=_t1@entry=0, _t2=_t2@entry=1) at .moc/release-shared/moc_qdeclarativevisualitemmodel_p.cpp:154
#77 0x00007f417e79171c in QDeclarativeVisualDataModel::_q_itemsInserted (this=0x3799af0, index=0, count=1) at graphicsitems/qdeclarativevisualitemmodel.cpp:1282
#78 0x00007f417e8c0771 in QDeclarativeVisualDataModel::qt_static_metacall (_o=0x7ffff090af60, _c=QMetaObject::QueryPropertyScriptable, _id=15099744, _a=0x1) at .moc/release-shared/moc_qdeclarativevisualitemmodel_p.cpp:400
#79 0x00007f417cb770ef in QMetaObject::activate (sender=sender@entry=0x26549c0, m=m@entry=0x7f417eba1880 <QListModelInterface::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffff090c9f0) at kernel/qobject.cpp:3539
#80 0x00007f417e8b4e6c in QListModelInterface::itemsInserted (this=this@entry=0x26549c0, _t1=_t1@entry=0, _t2=_t2@entry=1) at .moc/release-shared/moc_qlistmodelinterface_p.cpp:107
#81 0x00007f417e6fae0b in QDeclarativeListModel::insert (this=0x26549c0, index=0, valuemap=...) at util/qdeclarativelistmodel.cpp:436
#82 0x00007f417e8b39ff in QDeclarativeListModel::qt_static_metacall (_o=0x7ffff090af60, _o@entry=0x26549c0, _c=QMetaObject::QueryPropertyScriptable, _c@entry=QMetaObject::InvokeMetaMethod, _id=15099744, _id@entry=4, _a=0x1, _a@entry=0x7ffff090cc90) at .moc/release-shared/moc_qdeclarativelistmodel_p.cpp:78
#83 0x00007f417e8b3b8f in QDeclarativeListModel::qt_metacall (this=0x26549c0, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0x7ffff090cc90) at .moc/release-shared/moc_qdeclarativelistmodel_p.cpp:123
#84 0x00007f417e85e078 in QDeclarativeObjectMethodScriptClass::callMethod (this=this@entry=0x21d0900, object=object@entry=0x26549c0, index=12, returnType=<optimized out>, argCount=<optimized out>, argTypes=0x7ffff090cf50, ctxt=ctxt@entry=0x7f414c9ba208) at qml/qdeclarativeobjectscriptclass.cpp:970
#85 0x00007f417e85fce6 in QDeclarativeObjectMethodScriptClass::callPrecise (this=0x21d0900, object=0x26549c0, data=..., ctxt=0x7f414c9ba208) at qml/qdeclarativeobjectscriptclass.cpp:944
#86 0x00007f417e86060b in QDeclarativeObjectMethodScriptClass::call (this=<optimized out>, o=<optimized out>, ctxt=<optimized out>) at qml/qdeclarativeobjectscriptclass.cpp:917
#87 0x00007f417946b203 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#88 0x00007f41793673a0 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#89 0x00007f4179344436 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#90 0x00007f4156d619b3 in ?? ()
#91 0x00000000019f7860 in ?? ()
#92 0x00007f41554b07c0 in ?? ()
#93 0x00007f410000000e in ?? ()
#94 0x00007f4100000003 in ?? ()
#95 0x00007f4100000003 in ?? ()
#96 0x00007fff00000010 in ?? ()
#97 0x0000000002beda80 in ?? ()
#98 0x00007f417c500191 in QGraphicsScenePrivate::drawItems (this=0x7ffff090d190, painter=0xffff000000000000, viewTransform=0x7f414c9ba198, exposedRegion=0x1f7, widget=0xffff000000000002) at graphicsview/qgraphicsscene.cpp:4739
#99 0x0000000000000000 in ?? ()