Ancient coin bug or bandit bug
Ancient coin gives 4 gold when if you are near a minion dying and 5 (Bandit)if a ally kills it, I'm by myself in lane but i'm still getting the gold as if an ally killed it, for the whole game ancient coin has been granting me extra gold regardless on any allies clearing them . in the pic i am the only one in lane, a minion dies, and i get the 5 gold. bit unfair and abuse worthy!

Edit: Did again in a custom definitely a bug! http://imgur.com/Svb21ai http://imgur.com/MKWIU2S