To reproduce:

1. create an internal page link referencing page X, do not enter a link title
2. delete the referenced page X
3. reload the page where you entered the link

Result:
Freemarker Exception that states a NullPointerException on line 82:
String pageTitle = getLinkNode().getTitle();
since getLinkNode() now obviously returns null

Expected Result:
A nice message showing that the result page doesn't exist anymore (in edit mode). In preview mode the link shouldn't be rendered at all in these cas
es.