NotImplementedError of unknown origin

Trying to parse this old file I had laying around as a test case: http://pastebin.com/yYr12cMH

This is the very simple parsing code (just uses `pycparser`'s `parse_file` with the `parser=GnuCParser()` kwarg): http://pastebin.com/7Si6e3q1

It fails with this IPython trace: http://pastebin.com/5SFZnXiU

This is some related debugger output: http://pastebin.com/Veb7n9a7

I can link you my exact libio.h file, but unfortunately I don't know what it looks like after `pycparser`'s pre processor call.

Any thoughts? (Is it possible to at least make the parser print which line causes the syntax error, since it keeps the coordinate?)