Version:           unspecified (using Devel) 
OS:                Linux

I experienced this crash with many open windows, running 4.5 Beta2:


Thread 1 (Thread 0xb772e780 (LWP 1695)):
[KCrash Handler]
#7  0x04a0ae1a in QGraphicsItem::isPanel (this=0xbc0eb98) at graphicsview/qgraphicsitem.cpp:1722
#8  0x04a552fe in QGraphicsScene::event (this=0x990d7c8, event=0xbfea2494) at graphicsview/qgraphicsscene.cpp:3450
#9  0x043da88c in QApplicationPrivate::notify_helper (this=0x991a778, receiver=0x990d7c8, e=0xbfea2494) at kernel/qapplication.cpp:4345
#10 0x043e1206 in QApplication::notify (this=0x9905cb0, receiver=0x990d7c8, e=0xbfea2494) at kernel/qapplication.cpp:3749
#11 0x04f2736b in KApplication::notify (this=0x9905cb0, receiver=0x990d7c8, event=0xbfea2494) at /usr/src/debug/kdelibs-4.4.85/kdeui/kernel/kapplication.cpp:302
#12 0x03c2aa73 in QCoreApplication::notifyInternal (this=0x9905cb0, receiver=0x990d7c8, event=0xbfea2494) at kernel/qcoreapplication.cpp:726
#13 0x043e74df in QCoreApplication::sendEvent (receiver=0x990d7c8, event=0xbfea2494) at ../../src/corelib/kernel/qcoreapplication.h:215
#14 0x04a72024 in QGraphicsView::viewportEvent (this=0x9d47a38, event=0xbfea2494) at graphicsview/qgraphicsview.cpp:2692
#15 0x048ae9b5 in viewportEvent (this=0x9f6e340, o=0x9ed22f8, e=0xbfea2494) at widgets/qabstractscrollarea_p.h:100
#16 QAbstractScrollAreaFilter::eventFilter (this=0x9f6e340, o=0x9ed22f8, e=0xbfea2494) at widgets/qabstractscrollarea_p.h:116
#17 0x03c2a16a in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=0x991a778, receiver=0x9ed22f8, event=0xbfea2494) at kernel/qcoreapplication.cpp:841
#18 0x043da86a in QApplicationPrivate::notify_helper (this=0x991a778, receiver=0x9ed22f8, e=0xbfea2494) at kernel/qapplication.cpp:4341
#19 0x043e12a1 in QApplication::notify (this=0x9905cb0, receiver=0x9ed22f8, e=0xbfea2494) at kernel/qapplication.cpp:4310
#20 0x04f2736b in KApplication::notify (this=0x9905cb0, receiver=0x9ed22f8, event=0xbfea2494) at /usr/src/debug/kdelibs-4.4.85/kdeui/kernel/kapplication.cpp:302
#21 0x03c2aa73 in QCoreApplication::notifyInternal (this=0x9905cb0, receiver=0x9ed22f8, event=0xbfea2494) at kernel/qcoreapplication.cpp:726
#22 0x0442d92d in sendEvent (this=0x9d47a38, event=0xbfea2494) at ../../src/corelib/kernel/qcoreapplication.h:215
#23 QWidget::event (this=0x9d47a38, event=0xbfea2494) at kernel/qwidget.cpp:8346
#24 0x0481b494 in QFrame::event (this=0x9d47a38, e=0xbfea2494) at widgets/qframe.cpp:557
#25 0x048acd8f in QAbstractScrollArea::event (this=0x9d47a38, e=0xbfea2494) at widgets/qabstractscrollarea.cpp:989
#26 0x04a74227 in QGraphicsView::event (this=0x9d47a38, event=0xbfea2494) at graphicsview/qgraphicsview.cpp:2666
#27 0x05666a34 in PanelView::event (this=0x9d47a38, event=0xbfea2494) at /usr/src/debug/kdebase-workspace-4.4.85/plasma/desktop/shell/panelview.cpp:1485
#28 0x043da88c in QApplicationPrivate::notify_helper (this=0x991a778, receiver=0x9d47a38, e=0xbfea2494) at kernel/qapplication.cpp:4345
#29 0x043e12a1 in QApplication::notify (this=0x9905cb0, receiver=0x9d47a38, e=0xbfea2494) at kernel/qapplication.cpp:4310
#30 0x04f2736b in KApplication::notify (this=0x9905cb0, receiver=0x9d47a38, event=0xbfea2494) at /usr/src/debug/kdelibs-4.4.85/kdeui/kernel/kapplication.cpp:302
#31 0x03c2aa73 in QCoreApplication::notifyInternal (this=0x9905cb0, receiver=0x9d47a38, event=0xbfea2494) at kernel/qcoreapplication.cpp:726
#32 0x043e3606 in sendSpontaneousEvent (act=0x9d47a38) at ../../src/corelib/kernel/qcoreapplication.h:218
#33 QApplication::setActiveWindow (act=0x9d47a38) at kernel/qapplication.cpp:2495
#34 0x0445fa9e in QApplication::x11ProcessEvent (this=0x9905cb0, event=0xbfea286c) at kernel/qapplication_x11.cpp:3515
#35 0x0448b282 in x11EventSourceDispatch (s=0x991d6b0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#36 0x0013a525 in g_main_dispatch (context=0x991c898) at gmain.c:1960
#37 IA__g_main_context_dispatch (context=0x991c898) at gmain.c:2513
#38 0x0013e268 in g_main_context_iterate (context=0xd17490, block=1, dispatch=1, self=0x9919f88) at gmain.c:2591
#39 0x0013e449 in IA__g_main_context_iteration (context=0x991c898, may_block=1) at gmain.c:2654
#40 0x03c54fd6 in QEventDispatcherGlib::processEvents (this=0x9919708, flags=...) at kernel/qeventdispatcher_glib.cpp:412
#41 0x0448acf6 in QGuiEventDispatcherGlib::processEvents (this=0x9919708, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#42 0x03c2960a in QEventLoop::processEvents (this=0xbfea2b64, flags=...) at kernel/qeventloop.cpp:149
#43 0x03c2994a in QEventLoop::exec (this=0xbfea2b64, flags=...) at kernel/qeventloop.cpp:201
#44 0x03c2df77 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1003
#45 0x043d9868 in QApplication::exec () at kernel/qapplication.cpp:3624
#46 0x0565fa30 in kdemain (argc=1, argv=0xbfea2d74) at /usr/src/debug/kdebase-workspace-4.4.85/plasma/desktop/shell/main.cpp:118
#47 0x080487ac in main (argc=1, argv=0xbfea2d74) at /usr/src/debug/kdebase-workspace-4.4.85/i686-redhat-linux-gnu/plasma/desktop/shell/plasma-desktop_dummy.cpp:3


Reproducible: Didn't try