Basically, I tried removing the code in hy/compiler.py that sets the line and column numbers of all the AST nodes on PyPy to 1. And...guess what?

It works.

The tests pass for me. Even more interesting, the issue in #742 where lines go crazy doesn't happen, so PyPy actually works better with Hy than CPython! (This is leading me to believe that the line issue is a CPython bug!)

My idea is to figure out which version of PyPy it is that fixed this and not clear the position data on the newer versions. Thoughts?