Fixes #29543

Change-Id: Ib7f3c32cc1e57c583ee52c486673a5b9568c2df8
GitHub-Last-Rev: 0cb3dc536245bb4f414cf09bb353fbafd5ca7537
GitHub-Pull-Request: golang/go#29544
Reviewed-on: https://go-review.googlesource.com/c/156279
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>