Updates golang/go#7797. Change-Id: I7aa57f3fb812ecf644c8f8c065848938868e473b Reviewed-on: https://go-review.googlesource.com/12767 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
See https://groups.google.com/d/msg/Golang-nuts/AoVxQ4bB5XQ/i8kpMxdbVlEJ R=hanwen CC=golang-codereviews https://golang.org/cl/86190043