Version:           unspecified (using KDE 4.6.2) 
OS:                Linux



Reproducible: Always

Steps to Reproduce:
Start plasma-desktop, click on the cashew, click and drag Height to the bottom of the screen.

Actual Results:  
Crash

Expected Results:  
Not crash

ASSERT failure in QWidget::mapTo(QWidget *parent, const QPoint &pos): "parent must be in parent hierarchy", file kernel/qwidget.cpp, line 4192

#0  0x00007fffefa89655 in raise () from /lib/libc.so.6
#1  0x00007fffefa8aad6 in abort () from /lib/libc.so.6
#2  0x00007ffff17d81e0 in qt_message_output (msgType=QtFatalMsg,
    buf=0xc1f7f8 "ASSERT failure in QWidget::mapTo(QWidget *parent, const QPoint &pos): \"parent must be in parent hierarchy\", file kernel/qwidget.cpp, line 4192") at global/qglobal.cpp:2282
#3  0x00007ffff17d835c in qt_message(QtMsgType, const char *, typedef __va_list_tag __va_list_tag *) (msgType=QtFatalMsg, msg=0x7ffff1981f20 "ASSERT failure in %s: \"%s\", file %s, line %d",
    ap=0x7fffffffbfe0) at global/qglobal.cpp:2328
#4  0x00007ffff17d8bca in qFatal (msg=0x7ffff1981f20 "ASSERT failure in %s: \"%s\", file %s, line %d") at global/qglobal.cpp:2511
#5  0x00007ffff17d7dd3 in qt_assert_x (where=0x7ffff0ff1878 "QWidget::mapTo(QWidget *parent, const QPoint &pos)", what=0x7ffff0ff1850 "parent must be in parent hierarchy",
    file=0x7ffff0ff1488 "kernel/qwidget.cpp", line=4192) at global/qglobal.cpp:2035
#6  0x00007ffff07f7cde in QWidget::mapTo (this=0xacd6f0, parent=0x8cfef0, pos=...) at kernel/qwidget.cpp:4191
#7  0x00007ffff0a38f18 in qt_flush (widget=0xacd6f0, region=..., windowSurface=0x919630, tlw=0x8cfef0, tlwOffset=...) at painting/qbackingstore.cpp:102
#8  0x00007ffff0a3e5b7 in QWidgetBackingStore::flush (this=0xacda10, widget=0x0, surface=0x0) at painting/qbackingstore.cpp:1410
#9  0x00007ffff0a399dc in QWidgetBackingStore::endPaint (this=0xacda10, cleaned=..., windowSurface=0x919630, beginPaintInfo=0x7fffffffc460) at painting/qbackingstore.cpp:390
#10 0x00007ffff0a3e2af in QWidgetBackingStore::sync (this=0xacda10) at painting/qbackingstore.cpp:1341
#11 0x00007ffff07f203a in QWidgetPrivate::syncBackingStore (this=0xb5bc40) at kernel/qwidget.cpp:1861
#12 0x00007ffff0804080 in QWidget::event (this=0x8cfef0, event=0x8543e0) at kernel/qwidget.cpp:8571
#13 0x00007ffff0cbe8a3 in QFrame::event (this=0x8cfef0, e=0x8543e0) at widgets/qframe.cpp:557
#14 0x00007ffff0d68e15 in QAbstractScrollArea::event (this=0x8cfef0, e=0x8543e0) at widgets/qabstractscrollarea.cpp:996
#15 0x00007ffff0f69755 in QGraphicsView::event (this=0x8cfef0, event=0x8543e0) at graphicsview/qgraphicsview.cpp:2741
#16 0x00007ffff7b8c619 in PanelView::event (this=0x8cfef0, event=0x8543e0) at /home/kde46/kde-workspace/plasma/desktop/shell/panelview.cpp:1604
#17 0x00007ffff079c740 in QApplicationPrivate::notify_helper (this=0x67e6d0, receiver=0x8cfef0, e=0x8543e0) at kernel/qapplication.cpp:4462
#18 0x00007ffff079c440 in QApplication::notify (this=0x66c200, receiver=0x8cfef0, e=0x8543e0) at kernel/qapplication.cpp:4427
#19 0x00007ffff296ac81 in KApplication::notify (this=0x66c200, receiver=0x8cfef0, event=0x8543e0) at /home/kde46/kdelibs/kdeui/kernel/kapplication.cpp:311
#20 0x00007ffff1901e7f in QCoreApplication::notifyInternal (this=0x66c200, receiver=0x8cfef0, event=0x8543e0) at kernel/qcoreapplication.cpp:787
#21 0x00007ffff1905bb1 in QCoreApplication::sendEvent (receiver=0x8cfef0, event=0x8543e0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#22 0x00007ffff19030b8 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x8cfef0, event_type=77, data=0x60c530) at kernel/qcoreapplication.cpp:1428
#23 0x00007ffff1902cd9 in QCoreApplication::sendPostedEvents (receiver=0x8cfef0, event_type=77) at kernel/qcoreapplication.cpp:1321
#24 0x00007ffff0f48549 in QGraphicsViewPrivate::dispatchPendingUpdateRequests (this=0xb5bc40) at ../../include/QtGui/private/../../../src/gui/graphicsview/qgraphicsview_p.h:189
#25 0x00007ffff0f2ec7d in QGraphicsScenePrivate::_q_processDirtyItems (this=0x702710) at graphicsview/qgraphicsscene.cpp:511
#26 0x00007ffff0f47d24 in QGraphicsScene::qt_metacall (this=0x67e600, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0xa74b20) at .moc/debug-shared/moc_qgraphicsscene.cpp:130
#27 0x00007ffff5da5807 in Plasma::Corona::qt_metacall (this=0x67e600, _c=QMetaObject::InvokeMetaMethod, _id=18, _a=0xa74b20) at /home/kde46/build-cmake/kdelibs/plasma/corona.moc:109
#28 0x00007ffff7b7209f in DesktopCorona::qt_metacall (this=0x67e600, _c=QMetaObject::InvokeMetaMethod, _id=18, _a=0xa74b20)
    at /home/kde46/build-cmake/kde-workspace/plasma/desktop/shell/desktopcorona.moc:101
#29 0x00007ffff1909ff3 in QMetaObject::metacall (object=0x67e600, cl=QMetaObject::InvokeMetaMethod, idx=18, argv=0xa74b20) at kernel/qmetaobject.cpp:237
#30 0x00007ffff1919712 in QMetaCallEvent::placeMetaCall (this=0xc098f0, object=0x67e600) at kernel/qobject.cpp:535
#31 0x00007ffff191a9ed in QObject::event (this=0x67e600, e=0xc098f0) at kernel/qobject.cpp:1217
#32 0x00007ffff0f397c6 in QGraphicsScene::event (this=0x67e600, event=0xc098f0) at graphicsview/qgraphicsscene.cpp:3545
#33 0x00007ffff079c740 in QApplicationPrivate::notify_helper (this=0x67e6d0, receiver=0x67e600, e=0xc098f0) at kernel/qapplication.cpp:4462
#34 0x00007ffff0799d64 in QApplication::notify (this=0x66c200, receiver=0x67e600, e=0xc098f0) at kernel/qapplication.cpp:3862
#35 0x00007ffff296ac81 in KApplication::notify (this=0x66c200, receiver=0x67e600, event=0xc098f0) at /home/kde46/kdelibs/kdeui/kernel/kapplication.cpp:311