BUG #6583: for loop cursor

The following bug has been logged on the website:

Bug reference: 6583
Logged by: Biju George
Email address: biju(dot)george(at)ust-global(dot)com
PostgreSQL version: 8.4.0
Operating system: Linux
Description:

Just this simple code throws below error --
CREATE OR REPLACE FUNCTION my_temp_func(v_acc_type integer)
RETURNS void AS
$BODY$
declare
v_cur cursor (acc_num integer) is select pid from public.my_trade_table
where acc_type = acc_num;
begin
for record_var in v_cur(v_acc_type) loop
raise notice 'ID is %',record_var.id;
end loop;
end;
$BODY$
LANGUAGE plpgsql;

------------Error---------------
ERROR: syntax error at or near "$1"
LINE 1: $1 ( $2 )
^
QUERY: $1 ( $2 )
CONTEXT: SQL statement in PL/PgSQL function "my_temp_func" near line 4

********** Error **********

ERROR: syntax error at or near "$1"
SQL state: 42601
Context: SQL statement in PL/PgSQL function "my_temp_func" near line 4