Last modified: 2014-09-07 12:25:08 UTC
https://meta.wikimedia.org/wiki/Special:GlobalGroupPermissions/Global_sysops links to https://meta.wikimedia.org/wiki/Special:WikiSets/Opted-out_of_global_sysop_wikis instead of https://meta.wikimedia.org/wiki/Special:WikiSets/7
It's happening with all the global groups with wikisets. The link doesn't point to the wikiset number.
In Special:WikiSets: $set = is_numeric( $subpage ) ? WikiSet::newFromId( $subpage ) : WikiSet::newFromName( $subpage ); So both links *should* work, it's unclear why it isn't working.
Unsure if this is related, but I'm noticing that the value of $subpage is (I think) 'Opted-out_of_global_sysop_wikis', but it's stored in the database as 'Opted-out of global sysop wikis'.