CVS Head: Pg_ctl bug?

I just noticed that if I don't specify a data directory either on the
command line or in $PGDATA,, pg_ctl fails silently on Windows (haven't
been able to test other platforms atm). Is this a bug or an oversight -
an error message would seem appropriate?

/D

postgres(at)PC30:/usr/local/pgsql$ bin/pg_ctl start
postgres(at)PC30:/usr/local/pgsql$ bin/pg_ctl -D data start
postmaster starting
postgres(at)PC30:/usr/local/pgsql$ LOG: database system was interrupted at
2005-08-29 00:34:07 GMT Standard Time
LOG: checkpoint record is at 0/39F218
LOG: redo record is at 0/39F218; undo record is at 0/0; shutdown TRUE
LOG: next transaction ID: 1478; next OID: 16392
LOG: next MultiXactId: 1; next MultiXactOffset: 0
LOG: database system was not properly shut down; automatic recovery in
progress
LOG: record with zero length at 0/39F260
LOG: redo is not required
LOG: database system is ready
LOG: transaction ID wrap limit is 2147484144, limited by database
"postgres"