Updates #31656.

Change-Id: Ide6f829282fcdf20c67998b766a201a6a92c3035
Reviewed-on: https://go-review.googlesource.com/c/go/+/174132
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>