Message5277

I have a fix in mind for this and other ast.py incompatibilities. My
current implementation is based on a fundemental mistake: I use the same
ast for internals as I use for ast.py. I plan to create a pure Python
ast for ast.py and make the internal ast a pure antlr beast (not a
PyObject). Making ast.py much more compatible should be easy from there.
It's a medium sized project though -- will probably be a few weeks
before I can get to it.