Hi everyone.

My patch[1] to remove the legacy `Revision` class from core was just merged, and this may have broken some extensions. Extensions deployed on WMF wikis had already been updated, but others may no longer work on MediaWiki 1.37.

All code using Revision objects had been emitting deprecation warnings since at least 1.35. I've also created a basic guide[2] to help migrate extensions that were not updated. This includes how to migrate code relying on hooks that passed Revision objects - all such hooks have been removed.

You can check out the phabricator task[3] for more info on what specifically was removed.

Special thanks to the Platform Engineering team, and specifically Petr Pchelko, for helping out and reviewing a whole bunch of patches.

Thanks, -DannyS712

[1] https://gerrit.wikimedia.org/r/c/mediawiki/core/+/684071 [2] https://www.mediawiki.org/wiki/Manual:Revision.php/Migration [3] https://phabricator.wikimedia.org/T247143