    YY_EXIT_FAILURE  1971 gtags-parser/asm_scan.c #define YY_EXIT_FAILURE 2
    YY_EXIT_FAILURE  2010 gtags-parser/php.c #define YY_EXIT_FAILURE 2
    YY_EXIT_FAILURE  1717 htags/asm.c    #define YY_EXIT_FAILURE 2
    YY_EXIT_FAILURE  1848 htags/c.c      #define YY_EXIT_FAILURE 2
    YY_EXIT_FAILURE  1715 htags/cpp.c    #define YY_EXIT_FAILURE 2
    YY_EXIT_FAILURE  1621 htags/java.c   #define YY_EXIT_FAILURE 2
    YY_EXIT_FAILURE  1864 htags/php.c    #define YY_EXIT_FAILURE 2