Bug 63268 error while activating view
I'm not sure what caused this behaviour. I created a workspace this morning, imported a few projects, and ran the UI Test Suite. However, I got an error when trying to activate the Hierarchy view (by clicking on it). The error looks like an infinite loop. The trace is over 800 lines long, so I'll attach it in a minute.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/TypeHierarchyViewPart.java
fShowQualifiedTypeNamesAction= new ShowQualifiedTypeNamesAction(this, false);
		
		fFocusOnTypeAction= new FocusOnTypeAction(this);
		
		fPaneLabelProvider= new JavaUILabelProvider();
		
		fAddStubAction= new AddMethodStubAction();
		fFocusOnSelectionAction= new FocusOnSelectionAction(this);	
	
		fPartListener= new IPartListener2() {
			public void partVisible(IWorkbenchPartReference ref) {
				IWorkbenchPart part= ref.getPart(false);
				if (part == TypeHierarchyViewPart.this) {
					visibilityChanged(true);
				}
			}
			public void partHidden(IWorkbenchPartReference ref) {
				IWorkbenchPart part= ref.getPart(false);
				if (part == TypeHierarchyViewPart.this) {
					visibilityChanged(false);
				}
			}
			public void partActivated(IWorkbenchPartReference ref) {
				IWorkbenchPart part= ref.getPart(false);
				if (part instanceof IEditorPart)
					editorActivated((IEditorPart) part);
			}
		 	public void partInputChanged(IWorkbenchPartReference ref) {
				IWorkbenchPart part= ref.getPart(false);
				if (part instanceof IEditorPart)