Pirates/Braves Game Ends With Blown Call

I really don't know how the umpire missed this call. It wasn't even close, and the umpire was right on top of it. As much as I like the Braves, this is just the wrong call:

Notice that even Lugo thought he was out until the umpire called him safe. I don't know what the procedure is for officially protesting a game, but the Pirates need to look into it - they're in the thick of a pennant race in the NL Central.