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
processOutstandingEvents();
		if (inputElement == null) {	
			clearInput();
		} else {
			fInputElement= inputElement;
			try {
				fHierarchyLifeCycle.ensureRefreshedTypeHierarchy(inputElement, JavaPlugin.getActiveWorkbenchWindow());
				
			} catch (InvocationTargetException e) {
				ExceptionHandler.handle(e, getSite().getShell(), TypeHierarchyMessages.TypeHierarchyViewPart_exception_title, TypeHierarchyMessages.TypeHierarchyViewPart_exception_message); 
				clearInput();
				return;
			} catch (InterruptedException e) {
				return;				
			}
				
			if (inputElement.getElementType() != IJavaElement.TYPE) {
				setView(VIEW_ID_TYPE);
			}
			
			fSelectInEditor= false;
			setMemberFilter(null);
			internalSelectType(null, false); 
			fIsEnableMemberFilter= false;
			if (!inputElement.equals(prevInput)) {
				updateHierarchyViewer(true);
			}
			IType root= getSelectableType(inputElement);