Bug 100429 dropping on type hierarchy method viewer updates input
20050616-0010 - Open a element in the type hierarchy - enable 'Show all inherited methods' - select a method from Object, drop it to itself - Hierarchy of Object is built Drop to itself can happen easely when clicking quickly on entries. Dropping on the method viewer should be disabled (and I think it was before)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/TypeHierarchyViewPart.java
menu.add(fFocusOnTypeAction);
		fNoHierarchyShownLabel.setMenu(menu.createContextMenu(fNoHierarchyShownLabel));
		
		fPagebook.showPage(fNoHierarchyShownLabel);
		try {
			fOrientation= fDialogSettings.getInt(DIALOGSTORE_VIEWORIENTATION);
			if (fOrientation < 0 || fOrientation > 3) {
				fOrientation= VIEW_ORIENTATION_VERTICAL;
			}
		} catch (NumberFormatException e) {
			fOrientation= VIEW_ORIENTATION_AUTOMATIC;
		}
		
		fCurrentOrientation= -1;
		
		setOrientation(fOrientation);
		
		if (fMemento != null) { 
			restoreLinkingEnabled(fMemento);
		}
		fToggleLinkingAction= new ToggleLinkingAction(this);
		
		IActionBars actionBars= getViewSite().getActionBars();
		IMenuManager viewMenu= actionBars.getMenuManager();
		for (int i= 0; i < fViewActions.length; i++) {
			ToggleViewAction action= fViewActions[i];
			viewMenu.add(action);
			action.setEnabled(false);
		}
		viewMenu.add(new Separator());