Updates golang/go#22891

Change-Id: Ibde5ce0867a78703a5a4f04fafc3d709ea4cbda3
Reviewed-on: https://go-review.googlesource.com/123656
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>