fix bug on mac os X and AlphaNum(double)
fix bug on mac os X and AlphaNum(double)

or-tools/or-tools,or-tools/or-tools,or-tools/or-tools,or-tools/or-tools,or-tools/or-tools,google/or-tools,google/or-tools,or-tools/or-tools,google/or-tools,google/or-tools,google/or-tools,google/or-tools