chall/ply-2.2/test/lex_re2.exp


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lex: Regular expression for rule 't_PLUS' matches empty string.
Traceback (most recent call last):
  File "./lex_re2.py", line 25, in ?
    lex.lex()
  File "../ply/lex.py", line 758, in lex
    raise SyntaxError,"lex: Unable to build lexer."
SyntaxError: lex: Unable to build lexer.