OP_FAIL_LOOK_BEHIND_NOT 1558 regcomp.c            r = add_opcode(reg, OP_FAIL_LOOK_BEHIND_NOT);
OP_FAIL_LOOK_BEHIND_NOT 6239 regcomp.c        { OP_FAIL_LOOK_BEHIND_NOT, "fail-look-behind-not", ARG_NON },
OP_FAIL_LOOK_BEHIND_NOT 3032 regexec.c          CASE(OP_FAIL_LOOK_BEHIND_NOT)  MOP_IN(OP_FAIL_LOOK_BEHIND_NOT);