Range assignment bug

From the recent "3 gotchas" discussion on reddit (https://www.reddit.com/r/golang/comments/3r8yz1/3_go_gotchas/):

Gopherjs: http://www.gopherjs.org/playground/#/Kj7gpCZpI-

output: {A} {B} {C} &{A} &{B} &{C}

versus Go: http://play.golang.org/p/w3apET-wcX

output: {A} {B} {C} &{C} &{C} &{C}