This issue has been fixed in CL 31390.

Fixes #15464.

Change-Id: I35e088f37bf3b544100ff131c72690bcfd788e5b
Reviewed-on: https://go-review.googlesource.com/31393Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>