SSB_UNKNOWN       755 pcre/pcrelib/pcre_study.c       return SSB_UNKNOWN;
SSB_UNKNOWN       857 pcre/pcrelib/pcre_study.c       if (rc == SSB_FAIL || rc == SSB_UNKNOWN) return rc;
SSB_UNKNOWN       904 pcre/pcrelib/pcre_study.c       if (rc == SSB_FAIL || rc == SSB_UNKNOWN) return rc;
SSB_UNKNOWN      1392 pcre/pcrelib/pcre_study.c   if (rc == SSB_UNKNOWN)