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1. Start your inner with a clean workspace. 2. Click and drag the 'Problems' view outside the workbench window to detach it. 3. An NPE is thrown. Seems to always have been a problem but is now surfacing due to the new code added to support bug 328253. java.lang.NullPointerException at org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer$1.handleEvent(StackRenderer.java:172) at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:41) at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:188) at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:197) at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1) at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148) at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:135) at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:78) at org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:39) at org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:73) at org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:58) at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:380) at org.eclipse.e4.ui.model.application.ui.basic.impl.PartImpl.setTooltip(PartImpl.java:822) at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart$2.propertyChanged(CompatibilityPart.java:205) at org.eclipse.ui.part.WorkbenchPart.firePropertyChange(WorkbenchPart.java:129) at org.eclipse.ui.part.WorkbenchPart.setTitleToolTip(WorkbenchPart.java:346) at org.eclipse.ui.internal.views.markers.ExtendedMarkersView.access$3(ExtendedMarkersView.java:1) at org.eclipse.ui.internal.views.markers.ExtendedMarkersView$6.partHidden(ExtendedMarkersView.java:766) at org.eclipse.ui.internal.WorkbenchPage.firePartHidden(WorkbenchPage.java:3145) at org.eclipse.ui.internal.WorkbenchPage.access$5(WorkbenchPage.java:3138) at org.eclipse.ui.internal.WorkbenchPage$E4PartListener.partHidden(WorkbenchPage.java:154) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.firePartHidden(PartServiceImpl.java:179) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.access$1(PartServiceImpl.java:177) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$1.handleEvent(PartServiceImpl.java:79) at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:41) at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:188) at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:197) at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1) at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148) at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:135) at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:78) at org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:39) at org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:73) at org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:58) at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:380) at org.eclipse.e4.ui.model.application.ui.impl.ElementContainerImpl.setSelectedElement(ElementContainerImpl.java:159) at org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer$3.widgetSelected(StackRenderer.java:437) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:234) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:774) at org.eclipse.e4.ui.widgets.CTabFolder.setSelection(CTabFolder.java:2830) at org.eclipse.e4.ui.widgets.CTabFolder.destroyItem(CTabFolder.java:519) at org.eclipse.e4.ui.widgets.CTabItem.dispose(CTabItem.java:126) at org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer.hideChild(StackRenderer.java:396) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.handleEvent(PartRenderingEngine.java:255) at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:41) at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:188) at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:197) at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1) at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148) at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:135) at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:78) at org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:39) at org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:73) at org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:58) at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:380) at org.eclipse.emf.common.notify.impl.NotificationImpl.dispatch(NotificationImpl.java:1033) at org.eclipse.emf.common.notify.impl.NotificationImpl.dispatch(NotificationImpl.java:1038) at org.eclipse.emf.common.notify.impl.NotifyingListImpl.remove(NotifyingListImpl.java:724) at org.eclipse.emf.common.util.AbstractEList.remove(AbstractEList.java:466) at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.detach(ModelServiceImpl.java:496) at org.eclipse.e4.ui.workbench.addons.dndaddon.DetachedDropAgent.drop(DetachedDropAgent.java:44) at org.eclipse.e4.ui.workbench.addons.dndaddon.DnDManager.startDrag(DnDManager.java:201) at org.eclipse.e4.ui.workbench.addons.dndaddon.DnDManager$3.handleEvent(DnDManager.java:112) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1253) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1052) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4083) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3674) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$6.run(PartRenderingEngine.java:772) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:681)
Created attachment 181402 [details] StackRenderer patch v1
(In reply to comment #1) > Created an attachment (id=181402) [details] > StackRenderer patch v1 Patch released to CVS HEAD.
Verified on Windows XP with I20101025-1602.
