OP_FAIL_POS      1439 ext/mbstring/oniguruma/regcomp.c     r = add_opcode(reg, OP_FAIL_POS);
OP_FAIL_POS      5749 ext/mbstring/oniguruma/regcomp.c   { OP_FAIL_POS,             "fail-pos",             ARG_NON },
OP_FAIL_POS      2622 ext/mbstring/oniguruma/regexec.c     case OP_FAIL_POS:  MOP_IN(OP_FAIL_POS);