Bug 43488 [typing] BadPositionCategoryException in LinkedPositionManager
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/link/contentassist/ContentAssistant2.java
delay= DEFAULT_AUTO_ACTIVATION_DELAY;
			delay= Math.round(delay * 1.5f);
			controller= new AdditionalInfoController2(fInformationControlCreator, delay);
		}
		fContextInfoPopup= new ContextInformationPopup2(this, fViewer);
		fProposalPopup= new CompletionProposalPopup2(this, fViewer, controller);
		
		manageAutoActivation(fIsAutoActivated);
	}
	
	/*
	 * @see IContentAssist#uninstall
	 */
	public void uninstall() {
		
		if (fProposalPopup != null)
			fProposalPopup.hide();
			
		if (fContextInfoPopup != null)
			fContextInfoPopup.hide();
			
		manageAutoActivation(false);
		
		if (fCloser != null) {
			fCloser.uninstall();
			fCloser= null;
		}
		
		fViewer= null;
	}