oids vs composite types, in cvs head

This works on 7.4 and 8.0 but not in cvs head:

create function foo(pg_type) returns oid as 'select $1.oid' language sql;
ERROR:  column "oid" not found in data type pg_type
CONTEXT:  SQL function "foo"

Is this intentional, or did the no-oids-by-default changes cut too deep?

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Andrew, Supernews
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