SSB_UNKNOWN       847 ext/pcre/pcrelib/pcre_study.c       return SSB_UNKNOWN;
SSB_UNKNOWN       972 ext/pcre/pcrelib/pcre_study.c       if (rc == SSB_FAIL || rc == SSB_UNKNOWN) return rc;
SSB_UNKNOWN      1019 ext/pcre/pcrelib/pcre_study.c       if (rc == SSB_FAIL || rc == SSB_UNKNOWN) return rc;
SSB_UNKNOWN      1538 ext/pcre/pcrelib/pcre_study.c   if (rc == SSB_UNKNOWN)