[Exim] no message log for message frozen by local_scan

I have noticed while writing a local_scan function that messages that are
frozen with LOCAL_SCAN_ACCEPT_FREEZE don't get a message log file written to
the spool:

  root@mutare:[mutare] (44) # grep 19DSMF-000OSb-Mw /var/log/exim/main_4.log
  2003-05-07 18:05:34 19DSMF-000OSb-Mw Content scan results: [filter: No .filter file] [vscan: EICAR]
  2003-05-07 18:05:34 19DSMF-000OSb-Mw Content scan timings: [filter: 95] [vscan: 289079]
  2003-05-07 18:05:34 19DSMF-000OSb-Mw <= ollie@??? H=mutare.noc.clara.net [195.8.70.95] P=smtp S=922
  2003-05-07 18:05:34 19DSMF-000OSb-Mw frozen by local_scan()
  root@mutare:[mutare] (45) # mailq
   5m   940 19DSMF-000OSb-Mw <ollie@???> *** frozen ***
            ollie@???

root@mutare:[mutare] (46) # /usr/exim/bin/exim -Mvl 19DSMF-000OSb-Mw
Failed to open msglog file for 19DSMF-000OSb-Mw: No such file or directory

Is this the expected behaviour under 4.14?

Thanks,

Ollie

--
Oliver Cook    Systems Administrator, Claranet UK
ollie@???                  020 7903 3065