Spotted in production as of 1.29.0-wmf.4:
Warning: fetchUser() expects exactly 2 parameters, 1 given in /srv/mediawiki/php-1.29.0-wmf.4/includes/specials/SpecialUserrights.php on line 335
Spotted in production as of 1.29.0-wmf.4:
Warning: fetchUser() expects exactly 2 parameters, 1 given in /srv/mediawiki/php-1.29.0-wmf.4/includes/specials/SpecialUserrights.php on line 335
Looks like the bad callers are ApiUserrights and ApiQueryUsers. The former should probably pass true as its $write parameter, the latter looks like it should pass false.
For ApiQueryUsers it doesn't really matter, it looks like the code path which checks this can't be reached (as it can't pass cross-wiki user names).
Change 324511 had a related patch set uploaded (by Bartosz Dziewoński):
SpecialUserrights: Make new fetchUser() parameter optional
Change 324516 had a related patch set uploaded (by Chad):
SpecialUserrights: Make new fetchUser() parameter optional
Change 324511 merged by jenkins-bot:
SpecialUserrights: Make new fetchUser() parameter optional
Change 324516 merged by jenkins-bot:
SpecialUserrights: Make new fetchUser() parameter optional