Q:

Need url of Invalid RSS feed

Can anybody provide me the url of invalid RSS feed which can throw a below on of the error:
http://validator.w3.org/feed/docs/
Kindly help out. I need to test one functionality

A:

Validating this url: http://httpbin.org/xml will result in UndefinedElement error. Or you could take any rss feed and add some errors to the markup and past that into the validator.

