Fixes #30746

Change-Id: I63f2d82f14eeaab6b14e956e21ddeec56fee025b
Reviewed-on: https://go-review.googlesource.com/c/go/+/167257
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>