Wikimedia Bugzilla is closed!

Example URLS:

https://en.wikinews.org/w/index.php?title=Special:NewsFeed&feed=atom&categories=Published&notcategories=No%20publish%7CArchived%7CAutoArchived%7Cdisputed&namespace=0&count=30&hourcount=124&ordermethod=categoryadd&stablepages=only

https://en.wikinews.org/w/index.php?title=Special:NewsFeed&feed=rss&categories=Featured%20article|Published&notcategories=No%20publish|disputed&namespace=0&hourcount=-1&ordermethod=categoryadd&stablepages=only

Sometime between 22:22 and 22:30 UTC on January 17, the NewsFeed extension began returning HTTP 500 errors.

Having inquired in #wikimedia-tech, I was advised as-follows:
[12:17] <brianmc> The RSS link on the enWN main page, https://en.wikinews.org/w/index.php?title=Special:NewsFeed&feed=atom&categories=Published&notcategories=No%20publish|Archived|AutoArchived|disputed&namespace=0&count=30&hourcount=124&ordermethod=categoryadd&stablepages=only, is similarly failing
[12:18] <vvv> PHP fatal error in /usr/local/apache/common-local/php-1.18/extensions/GoogleNewsSitemap/FeedSMItem.php line 111
[12:18] <vvv> Access level to FeedSMItem::$title must be public (as in class FeedItem)
[12:18] <vvv> Looks like we got a real problem

No changes in RC seem to have obviously resulted in this, and the differing example calls to Special:NewsFeed share almost nothing in common data.