consistency check on SPI tuple count failed

Hi all,
the following code was working properly under Postgres 7.3.X
I'm now running my regression test with Postgres 7.4beta1 and I'm
having the error in subj.

CREATE TABLE test ( a integer, b integer );

INSERT INTO test VALUES ( 1 );

CREATE OR REPLACE FUNCTION foo(INTEGER)
RETURNS INTEGER AS'
BEGIN    RETURN $1 + 1;
END;
' LANGUAGE 'plpgsql';


CREATE OR REPLACE FUNCTION bar()
RETURNS INTEGER AS'
DECLARE   my_ret RECORD;
BEGIN        FOR my_ret IN         SELECT foo(a) AS ret         FROM test    LOOP         IF my_ret.ret = 3 THEN
       RETURN -1;         END IF;                       END LOOP;
 
    RETURN 0;

END;
' LANGUAGE 'plpgsql';



Regards
Gaetano Mendola