ONIGERR_EMPTY_CHAR_CLASS   77 ext/mbstring/oniguruma/regerror.c   case ONIGERR_EMPTY_CHAR_CLASS:
ONIGERR_EMPTY_CHAR_CLASS 4202 ext/mbstring/oniguruma/regparse.c       return ONIGERR_EMPTY_CHAR_CLASS;
ONIGERR_EMPTY_CHAR_CLASS   73 ext/mbstring/oniguruma/regposix.c     { ONIGERR_EMPTY_CHAR_CLASS,                           REG_ECTYPE  },