1. Jason R. Coombs
  2. ply

Source

ply / test / yacc_inf.exp

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yacc: Warning. Token 'NUMBER' defined, but not used.
yacc: Warning. There is 1 unused token.
yacc: Infinite recursion detected for symbol 'statement'.
yacc: Infinite recursion detected for symbol 'expression'.
ply.yacc.YaccError: Unable to construct parser.