extension API broken in python 2.7 #95

Traceback (most recent call last):
  File "build.py", line 7, in <module>
    with_cuda=False
  File "/Users/soumith/anaconda/lib/python2.7/site-packages/torch/utils/ffi/__init__.py", line 127, in compile_extension
    ffi.cdef(_typedefs + header_source);
  File "/Users/soumith/anaconda/lib/python2.7/site-packages/cffi/api.py", line 105, in cdef
    self._cdef(csource, override=override, packed=packed)
  File "/Users/soumith/anaconda/lib/python2.7/site-packages/cffi/api.py", line 119, in _cdef
    self._parser.parse(csource, override=override, **options)
  File "/Users/soumith/anaconda/lib/python2.7/site-packages/cffi/cparser.py", line 299, in parse
    self._internal_parse(csource)
  File "/Users/soumith/anaconda/lib/python2.7/site-packages/cffi/cparser.py", line 304, in _internal_parse
    ast, macros, csource = self._parse(csource)
  File "/Users/soumith/anaconda/lib/python2.7/site-packages/cffi/cparser.py", line 260, in _parse
    ast = _get_parser().parse(csource)
  File "/Users/soumith/anaconda/lib/python2.7/site-packages/cffi/cparser.py", line 40, in _get_parser
    _parser_cache = pycparser.CParser()
  File "/Users/soumith/anaconda/lib/python2.7/site-packages/pycparser/c_parser.py", line 87, in __init__
    outputdir=taboutputdir)
  File "/Users/soumith/anaconda/lib/python2.7/site-packages/pycparser/c_lexer.py", line 66, in build
    self.lexer = lex.lex(object=self, **kwargs)
  File "/Users/soumith/anaconda/lib/python2.7/site-packages/pycparser/ply/lex.py", line 911, in lex
    lexobj.readtab(lextab, ldict)
  File "/Users/soumith/anaconda/lib/python2.7/site-packages/pycparser/ply/lex.py", line 233, in readtab
    titem.append((re.compile(pat, lextab._lexreflags | re.VERBOSE), _names_to_funcs(func_name, fdict)))
  File "/Users/soumith/anaconda/lib/python2.7/re.py", line 194, in compile
    return _compile(pattern, flags)
  File "/Users/soumith/anaconda/lib/python2.7/re.py", line 249, in _compile
    p = sre_compile.compile(pattern, flags)
  File "/Users/soumith/anaconda/lib/python2.7/sre_compile.py", line 583, in compile
    "sorry, but this version only supports 100 named groups"
AssertionError: sorry, but this version only supports 100 named groups