REG_ESUBREG       100 ext/mbstring/oniguruma/regposix.c     { ONIGERR_TOO_BIG_BACKREF_NUMBER,                     REG_ESUBREG },
REG_ESUBREG       101 ext/mbstring/oniguruma/regposix.c     { ONIGERR_INVALID_BACKREF,                            REG_ESUBREG },
REG_ESUBREG        81 ext/pcre/pcrelib/pcreposix.c   REG_ESUBREG, /* reference to non-existent subpattern */
REG_ESUBREG       514 regex/regcomp.c 			SETERROR(REG_ESUBREG);
REG_ESUBREG        44 regex/regerror.c 	{REG_ESUBREG,	"REG_ESUBREG",	"invalid backreference number"},