Bug 330803 SWTException from tool item dropdowns after closing/reopening perspectives
1. Click the 'Run' tool item's dropdown arrow. 2. Window > Close Perspective 3. Window > Open Perspective > Other... > Java 4. Repeat step 1. org.eclipse.swt.SWTException: Widget is disposed at org.eclipse.swt.SWT.error(SWT.java:4091) at org.eclipse.swt.SWT.error(SWT.java:4006) at org.eclipse.swt.SWT.error(SWT.java:3977) at org.eclipse.swt.widgets.Widget.error(Widget.java:468) at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:340) at org.eclipse.swt.widgets.Menu.setLocation(Menu.java:1427) at org.eclipse.e4.ui.workbench.renderers.swt.ToolItemRenderer$5.widgetSelected(ToolItemRenderer.java:315) 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.Display.runDeferredEvents(Display.java:4084) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3675) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$6.run(PartRenderingEngine.java:780) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:696) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:91)
bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/ui/workbench/renderers/swt/ToolItemRenderer.java
@Inject
	Logger logger;
	@Inject
	IEventBroker eventBroker;
	private EventHandler itemUpdater = new EventHandler() {
		public void handleEvent(Event event) {
			
			if (!(event.getProperty(UIEvents.EventTags.ELEMENT) instanceof MToolItem))
				return;
			MToolItem itemModel = (MToolItem) event
					.getProperty(UIEvents.EventTags.ELEMENT);
			ToolItem toolItem = (ToolItem) itemModel.getWidget();
			
			if (toolItem == null)
				return;
			String attName = (String) event
					.getProperty(UIEvents.EventTags.ATTNAME);
			if (UIEvents.UILabel.LABEL.equals(attName)) {
				setItemText(itemModel, toolItem);
			} else if (UIEvents.UILabel.ICONURI.equals(attName)) {
				toolItem.setImage(getImage(itemModel));
			} else if (UIEvents.UILabel.TOOLTIP.equals(attName)) {
				toolItem.setToolTipText(getToolTipText(itemModel));
				toolItem.setImage(getImage(itemModel));
			}
		}
	};
	private EventHandler selectionUpdater = new EventHandler() {
		public void handleEvent(Event event) {