ext/ply/test/lex_re2.exp

   1 lex: Regular expression for rule 't_PLUS' matches empty string.
   2 Traceback (most recent call last):
   3   File "./lex_re2.py", line 25, in <module>
   4     lex.lex()
   5   File "../ply/lex.py", line 759, in lex
   6     raise SyntaxError,"lex: Unable to build lexer."
   7 SyntaxError: lex: Unable to build lexer.