Wikimedia Bugzilla is closed!

I'm trying to get CentralAuth's SUL2 limping locally.
With $wgCentralAuthAutoNew=true to make it create a global account, I'm getting

Fatal error: Call to a member function getFullUrl() on a non-object in .../extensions/CentralAuth/CentralAuthHooks.php on line 464

The call to $wiki->getFullUrl() in doCentralLoginRedirect() fatals because the earlier call to 
  $wiki = WikiMap::getWiki( $wgCentralAuthLoginWiki );
returns null.

To avoid the fatal the code could test if ( $wiki ) before invoking. Although, I'm not sure if there's reasonable recovery if MW is supposed to do the redirect and can't.

Obviously I'll set up WikiMap.