Fixes #30325

Change-Id: I497110224bb73ecfcc4655698a794e7aa4a66925
Reviewed-on: https://go-review.googlesource.com/c/go/+/175517
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Adam Langley <agl@golang.org>