https://bugs.freedesktop.org/show_bug.cgi?id=81644
--- Comment #83 from Aaron B aaronbottegal@gmail.com --- This bisect put me here, which looks like it didn't go as planned again...
http://cgit.freedesktop.org/mesa/mesa/commit/?id=78578b759943cb198d34eedc00b...
I'm going to give up for now, maybe when I don't have so many other things going on I'll bisect it over a week or so.