Fixes #27859

Change-Id: Ibb459cf41c3a8fe41bb008f60ef6cdd3437a37b1
Reviewed-on: https://go-review.googlesource.com/c/140860
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>