It fails on Solaris often, but nowhere else.

Not sure why. Add some debugging.

Change-Id: I79fc710bd339ae972d624c73a46bd8d215729c10
Reviewed-on: https://go-review.googlesource.com/37659Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>