SIZE_OP_FAIL_POS 1387 ext/mbstring/oniguruma/regcomp.c     len = SIZE_OP_PUSH_POS_NOT + tlen + SIZE_OP_FAIL_POS;
SIZE_OP_FAIL_POS 1435 ext/mbstring/oniguruma/regcomp.c     r = add_opcode_rel_addr(reg, OP_PUSH_POS_NOT, len + SIZE_OP_FAIL_POS);