[mwxml/iteration/page.py#L86](https://github.com/mediawiki-utilities/python-mwxml/blob/master/mwxml/iteration/page.py#L86) doesn't handle "DiscussionThreading" tags in XML dump, which are legal according to XML schema at [https://www.mediawiki.org/xml/export-0.8.xsd](https://www.mediawiki.org/xml/export-0.8.xsd). MalformedXML will interrupt the page iteration, which needs to be fixed.