OP_FAIL          1202 regcomp.c          r = add_opcode(reg, OP_FAIL);
OP_FAIL          6215 regcomp.c        { OP_FAIL,                "fail",                 ARG_NON },
OP_FAIL          1284 regexec.c      static int OpPrevTarget = OP_FAIL;
OP_FAIL          3070 regexec.c          CASE(OP_FAIL)  MOP_IN(OP_FAIL);