Fixes #23123

Change-Id: Ia4ac947cc49ef3d150ef60a095b86552dcef397d
Reviewed-on: https://go-review.googlesource.com/84435Reviewed-by: Giovanni Bajo <rasky@develer.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Giovanni Bajo <rasky@develer.com>