Wikimedia Bugzilla is closed!

The string ':' is treated differently. It is a valid title in Title.php, but also a bad title at other situation:
* Gives no 'invalid': https://en.wikipedia.org/w/api.php?action=query&titles=:
* {{fullurl::}} gives a '//en.wikipedia.org/wiki/'
* but {{fullurl:>}} as invalid title would not parsed
* [[:]] is not parsed
* You cannot view the page corrosponding to : https://en.wikipedia.org/w/index.php?title=:
* Using api action=edit gives a exception: error;{code=internal_api_error_MWException, info=Exception Caught: Something is trying to edit an article with an empty title};
* A move will give articleexists, because there is strlen < 1 check.
* api action=protect allows the (create) protection of that title

In my opinion Title::secureAndSplit should reject a single colon as title.