Extension manager status from 4.2 is not properly loaded

Displaying the details of the extension cause an NPE during the preparation of the logs status in extension.vm at line 640 with the following misleading message:

Invocation of method 'xml' in  class org.xwiki.velocity.tools.EscapeTool threw exception java.lang.NullPointerException at xwiki:XWiki.AddExtensions[line 640, column 46

The issue is that $argument.toString() cause an NPE when being an instance of org.xwiki.model.reference.DocumentReference. The org.xwiki.extension.ExtensionId is also bad, but it returns "null-null".

I attached the status.xml that produce the issue.