ref: c8c4b88ecadf05438561c05f97500e35843218c4
parent: ac306beff772b0a894ca95e0e0d0fe3029c7f8e4
author: Ori Bernstein <ori@eigenstate.org>
date: Sun Sep 27 18:52:17 EDT 2015
Don't index directly off of %rax.
We use it for function returns. We also use it for environment of
called closures. This means we clobbered it. Oops.