When the PTRs came back up later in the evening, the spell was removed and all premade Warlocks had their talents and spell lists wiped. So not only do new Warlocks have to drop 350g to repopulate their empty spellbooks, they have to run all the quest lines to reacquire their pets. Needless to say, there aren't many premade Warlocks on the PTRs this week.
Still, it would have been fun to have seen the PvP matches before this mistake was caught.
EDIT: YouTube vid after the jump!
Thanks to reader Tempestion for the vid.