If you follow a redlink to a Flow board, you get an error page

Internal error - {{SITENAME}}
The action specified by the URL is invalid. You might have mistyped the URL, or followed an incorrect link. This might also indicate a bug in the software used by SPageWiki.

and depending on how your wiki is configured for errors, you get:

[0264606c] /wiki/index.php?title=User_talk:Selenium_user&action=edit&redlink=1 Exception from line 80 of /home/spage/projects/core/extensions/Flow/includes/View.php: Unrecognized get action: edit

Currently this is unlikely to happen in production, since we set up Flow in advance on a page-by-page basis. But when we allow Flow user pages, either by $wgFlowOccupyNamespaces or by a beta opt-in features, it's likely to happen.

We could make redlink handling aware of Flow so it just takes you to the Flow board instead of putting action=edit on the URL. But I think it's better and easier for Flow to swallow the exception for action=edit and let the user view the board, since that's the precursor to choosing something to edit (the board header, a topic title, or some post).

Maybe there are other MediaWiki-generated action links that should not result in action errors when performed on Flow boards. We document action handling at https://www.mediawiki.org/wiki/Flow/Architecture#URL_actions

I filed bug 62165 about the garbled {{SITENAME}} in the title, it should be 'nosuchaction'.

Version: master
Severity: major
URL: https://www.mediawiki.org/wiki/Talk:Flow?action=edit
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=60936
https://bugzilla.wikimedia.org/show_bug.cgi?id=69879