haddock failure during validate on os x

[Kazu Yamamoto ( 山本和彦 )]

> This seems to be caused by running "sh validate" in a build tree setup per
> the instructions here
> http://hackage.haskell.org/trac/ghc/wiki/Building/Using  .  I re-ran "sh
> validate" in my source tree, and it went through OK.
> 
> Is this expected, or should validating in a build tree be supported?

For last one week, building GHC stops halfway and one more typing
"make" finishes the building. This is a bug.

--Kazu