Bug 306845

Summary: Trying to insert widget in Plasma
Product: [Unmaintained] plasma4 Reporter: Jeppe Bundsgaard <jeppe>
Component: generalAssignee: Plasma Bugs List <plasma-bugs>
Status: RESOLVED DUPLICATE    
Severity: crash CC: michal
Priority: NOR    
Version: 4.9.1   
Target Milestone: ---   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:
Attachments: New crash information added by DrKonqi

Description Jeppe Bundsgaard 2012-09-15 14:47:45 UTC 
Application: plasma-desktop (0.4)
KDE Platform Version: 4.9.1
Qt Version: 4.8.2
Operating System: Linux 3.5.0-14-generic x86_64
Distribution: Ubuntu quantal (development branch)

-- Information about the crash:
- What I was doing when the application crashed:
I was drag-and-dropping a widget to the Plasma activity bar

- Unusual behavior I noticed:
None apart from the crash

-- Backtrace:
Application: Plasma desktop-skal (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f0be06cb780 (LWP 1788))]

Thread 5 (Thread 0x7f0bd5af7700 (LWP 1789)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f0bed757ca7 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f0bed757cd9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f0be7df3e9a in start_thread (arg=0x7f0bd5af7700) at pthread_create.c:308
#4  0x00007f0bf3a5239d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f0bcda96700 (LWP 1791)):
#0  0x00007f0be7731c2a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f0be7731e99 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0be76f4683 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0be76f4d0b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f0be76f4f04 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f0bf0700036 in QEventDispatcherGlib::processEvents (this=0x7f0bc80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f0bf06d063f in QEventLoop::processEvents (this=this@entry=0x7f0bcda95df0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f0bf06d08c8 in QEventLoop::exec (this=0x7f0bcda95df0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f0bf05d3a50 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x00007f0bf06b0f2f in QInotifyFileSystemWatcherEngine::run (this=0x1b60dd0) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007f0bf05d69eb in QThreadPrivate::start (arg=0x1b60dd0) at thread/qthread_unix.cpp:307
#11 0x00007f0be7df3e9a in start_thread (arg=0x7f0bcda96700) at pthread_create.c:308
#12 0x00007f0bf3a5239d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f0bc7fff700 (LWP 1792)):
#0  0x00007f0bf3a469e3 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f0be76f4de4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0be76f4f04 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0bf0700036 in QEventDispatcherGlib::processEvents (this=0x7f0bc00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f0bf06d063f in QEventLoop::processEvents (this=this@entry=0x7f0bc7ffedf0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f0bf06d08c8 in QEventLoop::exec (this=0x7f0bc7ffedf0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f0bf05d3a50 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007f0bf06b0f2f in QInotifyFileSystemWatcherEngine::run (this=0x1caafc0) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f0bf05d69eb in QThreadPrivate::start (arg=0x1caafc0) at thread/qthread_unix.cpp:307
#9  0x00007f0be7df3e9a in start_thread (arg=0x7f0bc7fff700) at pthread_create.c:308
#10 0x00007f0bf3a5239d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f0bbec39700 (LWP 1799)):
#0  0x00007f0bf3a469e3 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f0be76f4de4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0be76f5242 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0bbf730796 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f0be7718915 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f0be7df3e9a in start_thread (arg=0x7f0bbec39700) at pthread_create.c:308
#6  0x00007f0bf3a5239d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f0be06cb780 (LWP 1788)):
[KCrash Handler]
#6  0x00007f0bf06eaf58 in QObject::connect (sender=0x7f0bab8dfbe8 <vtable for Attica::KdePlatformDependent+232>, signal=0x7f0bab9a2ad0 "2authenticationRequired(QNetworkReply*,QAuthenticator*)", receiver=0x51dae48, method=0x7f0bab9a2a68 "1authenticate(QNetworkReply*,QAuthenticator*)", type=Qt::AutoConnection) at kernel/qobject.cpp:2551
#7  0x00007f0bab9932b0 in Attica::ProviderManager::ProviderManager() () from /usr/lib/libattica.so.0.3
#8  0x00007f0babbd9bc8 in OcsEngine::OcsEngine (this=0x51dadf0, parent=<optimized out>, args=...) at ../../../dataengines/ocs/ocsengine.cpp:47
#9  0x00007f0babbe3aa7 in KPluginFactory::createInstance<OcsEngine, QObject> (parentWidget=<optimized out>, parent=<optimized out>, args=...) at /usr/include/kpluginfactory.h:477
#10 0x00007f0bf0ea6195 in KPluginFactory::create (this=0x3a73620, iface=0x7f0bf36de160 <qt_meta_stringdata_Plasma__DataEngine> "Plasma::DataEngine", parentWidget=0x0, parent=0x0, args=..., keyword=...) at ../../kdecore/util/kpluginfactory.cpp:203
#11 0x00007f0bf35998d3 in create<Plasma::DataEngine> (args=..., keyword=..., parent=0x0, parentWidget=0x0, this=0x3a73620) at ../../kdecore/util/kpluginfactory.h:531
#12 createInstance<Plasma::DataEngine> (error=0x7fff7bcf1170, args=..., parent=0x0, parentWidget=0x0, this=0x4a14d30) at ../../kdecore/services/kservice.h:559
#13 createInstance<Plasma::DataEngine> (error=0x7fff7bcf1170, args=..., parent=0x0, this=0x4a14d30) at ../../kdecore/services/kservice.h:536
#14 Plasma::PluginLoader::loadDataEngine (this=<optimized out>, name=...) at ../../plasma/pluginloader.cpp:184
#15 0x00007f0bf35824c0 in Plasma::DataEngineManager::loadEngine (this=0x158c020, name=...) at ../../plasma/dataenginemanager.cpp:131
#16 0x00007f0bf35b70a3 in Plasma::DataEngineConsumer::dataEngine (this=0x4691050, name=...) at ../../plasma/private/dataengineconsumer.cpp:105
#17 0x00007f0bf3547dcc in Plasma::Applet::dataEngine (this=0x5243240, name=...) at ../../plasma/applet.cpp:685
#18 0x00007f0babdf7d18 in initEngine (this=0x5243240) at ../../../applets/social-news/activities.cpp:82
#19 OpenDesktopActivities::initEngine (this=0x5243240) at ../../../applets/social-news/activities.cpp:77
#20 0x00007f0babdf7dc5 in OpenDesktopActivities::graphicsWidget (this=this@entry=0x5243240) at ../../../applets/social-news/activities.cpp:58
#21 0x00007f0babdf7f26 in OpenDesktopActivities::OpenDesktopActivities (this=0x5243240, parent=<optimized out>, args=...) at ../../../applets/social-news/activities.cpp:51
#22 0x00007f0babdf8537 in KPluginFactory::createInstance<OpenDesktopActivities, QObject> (parentWidget=<optimized out>, parent=<optimized out>, args=...) at /usr/include/kpluginfactory.h:477
#23 0x00007f0bf0ea6195 in KPluginFactory::create (this=0x48f9970, iface=0x7f0bf36da780 <qt_meta_stringdata_Plasma__Applet> "Plasma::Applet", parentWidget=0x0, parent=0x0, args=..., keyword=...) at ../../kdecore/util/kpluginfactory.cpp:203
#24 0x00007f0bf359a39c in create<Plasma::Applet> (args=..., keyword=..., parent=0x0, parentWidget=0x0, this=0x48f9970) at ../../kdecore/util/kpluginfactory.h:531
#25 createInstance<Plasma::Applet> (error=0x7fff7bcf1630, args=..., parent=0x0, parentWidget=0x0, this=0x4fdaf80) at ../../kdecore/services/kservice.h:559
#26 createInstance<Plasma::Applet> (error=0x7fff7bcf1630, args=..., parent=0x0, this=0x4fdaf80) at ../../kdecore/services/kservice.h:536
#27 Plasma::PluginLoader::loadApplet (this=<optimized out>, name=..., appletId=<optimized out>, args=...) at ../../plasma/pluginloader.cpp:151
#28 0x00007f0bf3567e63 in Plasma::ContainmentPrivate::addApplet (this=0x1555620, name=..., args=..., appletGeometry=..., id=id@entry=0, delayInit=delayInit@entry=false) at ../../plasma/containment.cpp:2223
#29 0x00007f0bf356816f in Plasma::Containment::addApplet (this=<optimized out>, name=..., args=..., appletGeometry=...) at ../../plasma/containment.cpp:856
#30 0x00007f0bf35697ac in Plasma::ContainmentPrivate::dropData (this=0x1555620, scenePos=..., screenPos=..., dropEvent=dropEvent@entry=0x7fff7bcf2360) at ../../plasma/containment.cpp:1275
#31 0x00007f0bf356b1e4 in dropEvent (event=0x7fff7bcf2360, this=0x1548110) at ../../plasma/containment.cpp:1236
#32 Plasma::Containment::dropEvent (this=0x1548110, event=0x7fff7bcf2360) at ../../plasma/containment.cpp:1233
#33 0x00007f0bf003ab77 in QGraphicsItem::sceneEvent (this=0x1548120, event=0x7fff7bcf2360) at graphicsview/qgraphicsitem.cpp:6723
#34 0x00007f0bf0064d8c in QGraphicsScenePrivate::sendDragDropEvent (this=this@entry=0x151e5c0, item=0x1548120, dragDropEvent=0x7fff7bcf2360) at graphicsview/qgraphicsscene.cpp:1250
#35 0x00007f0bf0064dcf in QGraphicsScene::dropEvent (this=<optimized out>, event=<optimized out>) at graphicsview/qgraphicsscene.cpp:3756
#36 0x00007f0bf0077910 in QGraphicsScene::event (this=0x1396460, event=0x7fff7bcf2360) at graphicsview/qgraphicsscene.cpp:3409
#37 0x00007f0befa79d9c in QApplicationPrivate::notify_helper (this=this@entry=0x1397240, receiver=receiver@entry=0x1396460, e=e@entry=0x7fff7bcf2360) at kernel/qapplication.cpp:4556
#38 0x00007f0befa7e20a in QApplication::notify (this=0x137e420, receiver=0x1396460, e=0x7fff7bcf2360) at kernel/qapplication.cpp:4417
#39 0x00007f0bf1387cb6 in KApplication::notify (this=0x137e420, receiver=0x1396460, event=0x7fff7bcf2360) at ../../kdeui/kernel/kapplication.cpp:311
#40 0x00007f0bf06d18ee in QCoreApplication::notifyInternal (this=0x137e420, receiver=0x1396460, event=0x7fff7bcf2360) at kernel/qcoreapplication.cpp:915
#41 0x00007f0bf008905d in sendEvent (event=0x7fff7bcf2360, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#42 QGraphicsView::dropEvent (this=<optimized out>, event=0x7fff7bcf2b80) at graphicsview/qgraphicsview.cpp:2912
#43 0x00007f0bf3d5cca9 in PanelView::dropEvent (this=0x21346f0, event=<optimized out>) at ../../../../plasma/desktop/shell/panelview.cpp:1672
#44 0x00007f0befac984e in QWidget::event (this=0x21346f0, event=0x7fff7bcf2b80) at kernel/qwidget.cpp:8561
#45 0x00007f0befe783e6 in QFrame::event (this=0x21346f0, e=0x7fff7bcf2b80) at widgets/qframe.cpp:557
#46 0x00007f0bf009112b in QGraphicsView::viewportEvent (this=0x21346f0, event=0x7fff7bcf2b80) at graphicsview/qgraphicsview.cpp:2866
#47 0x00007f0bf06d1a56 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<optimized out>, receiver=0x22ee5d0, event=0x7fff7bcf2b80) at kernel/qcoreapplication.cpp:1025
#48 0x00007f0befa79d6c in QApplicationPrivate::notify_helper (this=this@entry=0x1397240, receiver=receiver@entry=0x22ee5d0, e=e@entry=0x7fff7bcf2b80) at kernel/qapplication.cpp:4552
#49 0x00007f0befa7ebb3 in QApplication::notify (this=<optimized out>, receiver=0x22ee5d0, e=0x7fff7bcf2b80) at kernel/qapplication.cpp:4342
#50 0x00007f0bf1387cb6 in KApplication::notify (this=0x137e420, receiver=0x22ee5d0, event=0x7fff7bcf2b80) at ../../kdeui/kernel/kapplication.cpp:311
#51 0x00007f0bf06d18ee in QCoreApplication::notifyInternal (this=0x137e420, receiver=0x22ee5d0, event=0x7fff7bcf2b80) at kernel/qcoreapplication.cpp:915
#52 0x00007f0befb01961 in sendEvent (event=0x7fff7bcf2b80, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#53 QX11Data::xdndHandleDrop (this=<optimized out>, xe=xe@entry=0x7fff7bcf2c90, passive=passive@entry=false) at kernel/qdnd_x11.cpp:1185
#54 0x00007f0befb03d35 in QDragManager::drop (this=this@entry=0x5227a30) at kernel/qdnd_x11.cpp:1757
#55 0x00007f0befb058a0 in QDragManager::eventFilter (this=0x5227a30, o=<optimized out>, e=<optimized out>) at kernel/qdnd_x11.cpp:1314
#56 0x00007f0bf06d19ba in QCoreApplicationPrivate::sendThroughApplicationEventFilters (this=0x1397240, receiver=0x51d8df0, event=0x7fff7bcf3370) at kernel/qcoreapplication.cpp:1006
#57 0x00007f0befa79d16 in QApplicationPrivate::notify_helper (this=this@entry=0x1397240, receiver=receiver@entry=0x51d8df0, e=e@entry=0x7fff7bcf3370) at kernel/qapplication.cpp:4531
#58 0x00007f0befa7ea6b in QApplication::notify (this=<optimized out>, receiver=0x51d8df0, e=0x7fff7bcf3370) at kernel/qapplication.cpp:4099
#59 0x00007f0bf1387cb6 in KApplication::notify (this=0x137e420, receiver=0x51d8df0, event=0x7fff7bcf3370) at ../../kdeui/kernel/kapplication.cpp:311
#60 0x00007f0bf06d18ee in QCoreApplication::notifyInternal (this=0x137e420, receiver=0x51d8df0, event=0x7fff7bcf3370) at kernel/qcoreapplication.cpp:915
#61 0x00007f0befa7abd3 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#62 QApplicationPrivate::sendMouseEvent (receiver=0x51d8df0, event=0x7fff7bcf3370, alienWidget=0x0, nativeWidget=0x51d8df0, buttonDown=0x7f0bf05572e8 <qt_button_down>, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3167
#63 0x00007f0befaf82a4 in QETWidget::translateMouseEvent (this=this@entry=0x51d8df0, event=event@entry=0x7fff7bcf3af0) at kernel/qapplication_x11.cpp:4617
#64 0x00007f0befaf719f in QApplication::x11ProcessEvent (this=0x137e420, event=0x7fff7bcf3af0) at kernel/qapplication_x11.cpp:3732
#65 0x00007f0befb1ed02 in x11EventSourceDispatch (s=0x139af90, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#66 0x00007f0be76f4b15 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#67 0x00007f0be76f4e48 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#68 0x00007f0be76f4f04 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#69 0x00007f0bf0700016 in QEventDispatcherGlib::processEvents (this=0x131bad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#70 0x00007f0befb1e97e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#71 0x00007f0bf06d063f in QEventLoop::processEvents (this=this@entry=0x4741060, flags=...) at kernel/qeventloop.cpp:149
#72 0x00007f0bf06d08c8 in QEventLoop::exec (this=0x4741060, flags=...) at kernel/qeventloop.cpp:204
#73 0x00007f0befb05556 in QDragManager::drag (this=0x5227a30, o=<optimized out>) at kernel/qdnd_x11.cpp:2024
#74 0x00007f0befa8b3c8 in QDrag::exec (this=0x4df5b80, supportedActions=..., defaultDropAction=Qt::MoveAction) at kernel/qdrag.cpp:284
#75 0x00007f0bbc289877 in DeclarativeDragArea::mouseMoveEvent (this=0x49fa250, event=<optimized out>) at ../../../../plasma/declarativeimports/draganddrop/DeclarativeDragArea.cpp:233
#76 0x00007f0bbc289949 in DeclarativeDragArea::sceneEventFilter (this=0x49fa250, item=0x488a630, event=<optimized out>) at ../../../../plasma/declarativeimports/draganddrop/DeclarativeDragArea.cpp:245
#77 0x00007f0bf005ded5 in QGraphicsScenePrivate::filterDescendantEvent (this=this@entry=0x151e5c0, item=item@entry=0x488a630, event=event@entry=0x7fff7bcf48a0) at graphicsview/qgraphicsscene.cpp:1159
#78 0x00007f0bf00634fe in QGraphicsScenePrivate::sendEvent (this=0x151e5c0, item=0x488a630, event=0x7fff7bcf48a0) at graphicsview/qgraphicsscene.cpp:1211
#79 0x00007f0bf0064120 in sendMouseEvent (mouseEvent=0x7fff7bcf48a0, this=0x151e5c0) at graphicsview/qgraphicsscene.cpp:1295
#80 QGraphicsScenePrivate::sendMouseEvent (this=0x151e5c0, mouseEvent=0x7fff7bcf48a0) at graphicsview/qgraphicsscene.cpp:1274
#81 0x00007f0bf0064c5c in QGraphicsScene::mouseMoveEvent (this=<optimized out>, mouseEvent=0x7fff7bcf48a0) at graphicsview/qgraphicsscene.cpp:4102
#82 0x00007f0bf0077960 in QGraphicsScene::event (this=0x1396460, event=0x7fff7bcf48a0) at graphicsview/qgraphicsscene.cpp:3451
#83 0x00007f0befa79d9c in QApplicationPrivate::notify_helper (this=this@entry=0x1397240, receiver=receiver@entry=0x1396460, e=e@entry=0x7fff7bcf48a0) at kernel/qapplication.cpp:4556
#84 0x00007f0befa7e20a in QApplication::notify (this=0x137e420, receiver=0x1396460, e=0x7fff7bcf48a0) at kernel/qapplication.cpp:4417
#85 0x00007f0bf1387cb6 in KApplication::notify (this=0x137e420, receiver=0x1396460, event=0x7fff7bcf48a0) at ../../kdeui/kernel/kapplication.cpp:311
#86 0x00007f0bf06d18ee in QCoreApplication::notifyInternal (this=0x137e420, receiver=0x1396460, event=0x7fff7bcf48a0) at kernel/qcoreapplication.cpp:915
#87 0x00007f0bf008ad94 in QGraphicsViewPrivate::mouseMoveEventHandler (this=this@entry=0x3b117f0, event=event@entry=0x7fff7bcf52d0) at graphicsview/qgraphicsview.cpp:646
#88 0x00007f0bf008de0e in QGraphicsView::mouseMoveEvent (this=0x3b10ef0, event=0x7fff7bcf52d0) at graphicsview/qgraphicsview.cpp:3276
#89 0x00007f0befac9664 in QWidget::event (this=0x3b10ef0, event=0x7fff7bcf52d0) at kernel/qwidget.cpp:8356
#90 0x00007f0befe783e6 in QFrame::event (this=0x3b10ef0, e=0x7fff7bcf52d0) at widgets/qframe.cpp:557
#91 0x00007f0bf009112b in QGraphicsView::viewportEvent (this=0x3b10ef0, event=0x7fff7bcf52d0) at graphicsview/qgraphicsview.cpp:2866
#92 0x00007f0bf06d1a56 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<optimized out>, receiver=0x4620be0, event=0x7fff7bcf52d0) at kernel/qcoreapplication.cpp:1025
#93 0x00007f0befa79d6c in QApplicationPrivate::notify_helper (this=this@entry=0x1397240, receiver=receiver@entry=0x4620be0, e=e@entry=0x7fff7bcf52d0) at kernel/qapplication.cpp:4552
#94 0x00007f0befa7ea6b in QApplication::notify (this=<optimized out>, receiver=0x4620be0, e=0x7fff7bcf52d0) at kernel/qapplication.cpp:4099
#95 0x00007f0bf1387cb6 in KApplication::notify (this=0x137e420, receiver=0x4620be0, event=0x7fff7bcf52d0) at ../../kdeui/kernel/kapplication.cpp:311
#96 0x00007f0bf06d18ee in QCoreApplication::notifyInternal (this=0x137e420, receiver=0x4620be0, event=0x7fff7bcf52d0) at kernel/qcoreapplication.cpp:915
#97 0x00007f0befa7abd3 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#98 QApplicationPrivate::sendMouseEvent (receiver=0x4620be0, event=0x7fff7bcf52d0, alienWidget=0x4620be0, nativeWidget=0x26884e0, buttonDown=0x7f0bf05572e8 <qt_button_down>, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3167
#99 0x00007f0befaf82a4 in QETWidget::translateMouseEvent (this=this@entry=0x26884e0, event=event@entry=0x7fff7bcf5a50) at kernel/qapplication_x11.cpp:4617
#100 0x00007f0befaf719f in QApplication::x11ProcessEvent (this=0x137e420, event=0x7fff7bcf5a50) at kernel/qapplication_x11.cpp:3732
#101 0x00007f0befb1ed02 in x11EventSourceDispatch (s=0x139af90, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#102 0x00007f0be76f4b15 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#103 0x00007f0be76f4e48 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#104 0x00007f0be76f4f04 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#105 0x00007f0bf0700016 in QEventDispatcherGlib::processEvents (this=0x131bad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#106 0x00007f0befb1e97e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#107 0x00007f0bf06d063f in QEventLoop::processEvents (this=this@entry=0x7fff7bcf5e20, flags=...) at kernel/qeventloop.cpp:149
#108 0x00007f0bf06d08c8 in QEventLoop::exec (this=0x7fff7bcf5e20, flags=...) at kernel/qeventloop.cpp:204
#109 0x00007f0bf06d5a88 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#110 0x00007f0bf3d57fe5 in kdemain (argc=1, argv=0x7fff7bcf6118) at ../../../../plasma/desktop/shell/main.cpp:120
#111 0x00007f0bf398176d in __libc_start_main (main=0x4006a0 <main(int, char**)>, argc=1, ubp_av=0x7fff7bcf6118, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff7bcf6108) at libc-start.c:226
#112 0x00000000004006d1 in _start ()

Reported using DrKonqi
Comment 1 Jekyll Wu 2012-09-15 15:01:34 UTC 
This is probably a downstream issue. See bug 306810
Comment 2 Micha 2012-09-30 21:28:02 UTC 
Created attachment 74256 [details]
New crash information added by DrKonqi

plasma-desktop (0.4) on KDE Platform 4.9.1 using Qt 4.8.2

- What I was doing when the application crashed:

I was adding new plasma widget to desktop area. I tried to do this once more immediately after crash and it worked without any problems.

-- Backtrace (Reduced):
#7  0x00007f8518dac40a in QGraphicsScenePrivate::sendMouseEvent (this=0xf79ca0, mouseEvent=0x7fff69ceecf0) at graphicsview/qgraphicsscene.cpp:1295
#8  0x00007f8518dacf3c in QGraphicsScene::mouseMoveEvent (this=<optimized out>, mouseEvent=0x7fff69ceecf0) at graphicsview/qgraphicsscene.cpp:4102
#9  0x00007f8518dbafbb in QGraphicsScene::event (this=0xfa6330, event=0x7fff69ceecf0) at graphicsview/qgraphicsscene.cpp:3451
#10 0x00007f851879d7b4 in notify_helper (e=0x7fff69ceecf0, receiver=0xfa6330, this=0xdd6ba0) at kernel/qapplication.cpp:4556
#11 QApplicationPrivate::notify_helper (this=0xdd6ba0, receiver=0xfa6330, e=0x7fff69ceecf0) at kernel/qapplication.cpp:4528
Comment 3 Myriam Schweingruber 2012-10-11 11:56:58 UTC 
(In reply to comment #2)
> Created attachment 74256 [details]
> New crash information added by DrKonqi

Sorry, but your backtrace is not the same as this bug, please check again.

*** This bug has been marked as a duplicate of bug 306810 ***