Change-Id: Id21cdce35963dcdb96cc06252170590224c5aa17
GitHub-Last-Rev: 429dad0ceba123415af308179d0d2aa9773e6323
GitHub-Pull-Request: golang/go#28000
Reviewed-on: https://go-review.googlesource.com/c/139424Reviewed-by: Ian Lance Taylor <iant@golang.org>