https://bugzilla.wikimedia.org/show_bug.cgi?id=55146
--- Comment #2 from Kunal Mehta (Legoktm) legoktm.wikipedia@gmail.com --- I posted this on the ML about a month ago (http://lists.wikimedia.org/pipermail/pywikipedia-l/2013-March/007766.html%5C) and assumed that because no one responded it wasn't a big deal so I didn't bother fixing it. This issue is more than just interwiki links, it's that we prevent read (and write for stewards) access for a locked (but readable) wiki.
I think the best way to fix it would be to split that list of obsolete wiki's into 3: locked, deleted, and obsolete (renamed, backwards compatibility), and then any wiki that is deleted/obsolete throw an error, but locked does not.
(Setting group to none since this also affects rewrite branch)