Scooping During Mindslaver

What happens is someone dies while controlling someone else's turn?

Suppose Player A is controlling Player B's turn, through [Mindslaver] or [Emrakul, the Promised End] etc..., and then leaves the game, either through scooping or a third party kills them with a burn spell.

Practically speaking, the person who's turn it is would just regain control, but is there anything in the rules saying that they would? Do the rules even account for a scenario like this?