PostgreSQL 8.3.4 reproducible crash

Hello.

Here is the SQL to reproduce the server crash:

CREATE SCHEMA bug1 AUTHORIZATION postgres;

SET search_path = bug1, pg_catalog;

CREATE FUNCTION bug1.domain_check (integer) RETURNS boolean
AS
$body$
SELECT $1 <> 0
$body$
LANGUAGE sql IMMUTABLE STRICT;

CREATE DOMAIN bug1."domain" AS integer
CONSTRAINT "check" CHECK (bug1.domain_check(VALUE));

CREATE TYPE bug1.composite AS (
id domain
);

select '(1)'::bug1.composite;