SSB_UNKNOWN       843 ext/pcre/pcrelib/pcre_study.c       return SSB_UNKNOWN;
SSB_UNKNOWN       968 ext/pcre/pcrelib/pcre_study.c       if (rc == SSB_FAIL || rc == SSB_UNKNOWN) return rc;
SSB_UNKNOWN      1015 ext/pcre/pcrelib/pcre_study.c       if (rc == SSB_FAIL || rc == SSB_UNKNOWN) return rc;
SSB_UNKNOWN      1533 ext/pcre/pcrelib/pcre_study.c   if (rc == SSB_UNKNOWN)