Bug 43488 [typing] BadPositionCategoryException in LinkedPositionManager
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
/*
	 * @see AbstractTextEditor#handlePreferenceStoreChanged(PropertyChangeEvent)
	 */
	protected void handlePreferenceStoreChanged(PropertyChangeEvent event) {
		
		try {			
			ISourceViewer sourceViewer= getSourceViewer();
			if (sourceViewer == null)
				return;
				
			String property= event.getProperty();	
			
			if (PreferenceConstants.EDITOR_TAB_WIDTH.equals(property)) {
				Object value= event.getNewValue();
				if (value instanceof Integer) {
					sourceViewer.getTextWidget().setTabs(((Integer) value).intValue());
				} else if (value instanceof String) {
					sourceViewer.getTextWidget().setTabs(Integer.parseInt((String) value));
				}
				return;
			}
			
			if (isJavaEditorHoverProperty(property))
				updateHoverBehavior();
			
			if (BROWSER_LIKE_LINKS.equals(property)) {
				if (isBrowserLikeLinks())
					enableBrowserLikeLinks();
				else