Spotted it thanks to a proposal in https://github.com/golang/go/issues/19727. Change-Id: I389a3fc0db3cf64fba41c3ecd70a236917ea8fa3 Reviewed-on: https://go-review.googlesource.com/41698 Run-TryBot: Sam Whited <sam@samwhited.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Sam Whited <sam@samwhited.com> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>