https://wikitech.wikimedia.org/wiki/Category:Pages_with_syntax_highlighting_errors lists the pages:
- https://wikitech.wikimedia.org/wiki/Analytics/AQS
- https://wikitech.wikimedia.org/wiki/Analytics/Cluster/Druid
- https://wikitech.wikimedia.org/wiki/User:Elukey/Analytics/AQS_Tasks
- https://wikitech.wikimedia.org/wiki/EventBus
- https://wikitech.wikimedia.org/wiki/EventBus/Administration
- https://wikitech.wikimedia.org/wiki/Service_restarts
- https://wikitech.wikimedia.org/wiki/SystemTap
- https://wikitech.wikimedia.org/wiki/Nova_Resource:Tools/Admin
as containing syntax highlighting errors and suggests remedies like adding lang="bash" or lang="shell-session". However, looking at the source of those pages, lang is always set to bash, python, shell-session, sql, or yaml, and these seem to be valid languages according to https://github.com/wikimedia/mediawiki-extensions-SyntaxHighlight_GeSHi/blob/master/SyntaxHighlight_GeSHi.lexers.php. I null-edited the last page to see if it was some caching problem to no avail.
So it could be:
- Something subtle is wrong on those pages;
- there is a problem with Extension:SyntaxHighlight_GeSHi on wikitech; or
- there is a problem with the maintenance category updates on wikitech (does that work by job queue?).
I suspect option #3 and file a subtask for that.