A giant with reach attack a prone target 10 feet away. Advantage or disadvantage on the attack roll?

@JeremyECrawford A giant with reach makes a melee attack against a prone target 10 feet away. Advantage or disadvantage on the attack roll?

— Jameson Coase (@JamesonCoase) April 1, 2016

The prone condition makes no exception for reach. #DnD https://t.co/Twtj4deE02

— Jeremy Crawford (@JeremyECrawford) April 4, 2016