BUG #1692: Drop table in plpgsql

The following bug has been logged online:

Bug reference: 1692
Logged by: Jocelyn Turcotte
Email address: turcotte(dot)j(at)gmail(dot)com
PostgreSQL version: 8.0.3
Operating system: Debian linux 1:3.3.5-12
Description: Drop table in plpgsql
Details:

I dont know if this bug is known (it seems to be a bug though), did not find
the todo list on the site.
If I execute the folowing code I get the error:

ERROR: relation with OID 3374698 does not exist
CONTEXT: SQL statement "INSERT INTO tmp values (1)"
PL/pgSQL function "bugtest" line 8 at SQL statement

Code:

CREATE OR REPLACE FUNCTION bugtest() returns integer as $proc$
DECLARE
yo record;
BEGIN
CREATE TEMP TABLE tmp (
col INTEGER
) ON COMMIT DROP;

INSERT INTO tmp values (1);

select into yo col from tmp;

DROP TABLE tmp;
RETURN 0;
END;
$proc$ language plpgsql;

select bugtest();
select bugtest();