Fixes golang/go#21104 Change-Id: I59054f9e2beed8a0c7efd513eb84795dc0308353 Reviewed-on: https://go-review.googlesource.com/52391 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>