BUG #1604: Composite types, triggers, and INET_CLIENT_ADDR() function

The following bug has been logged online:

Bug reference:      1604
Logged by:          Chris Trawick
Email address:      ctrawick@cultured.net
PostgreSQL version: 8.0.1
Operating system:   i686-pc-linux-gnu, compiled by GCC i686-pc-linux-gnu-gcc
(GCC) 3.3.5  (Gentoo Linux 3.3.5-r1, ssp-3.3.2-3, pie-8.7.7.1)
Description:        Composite types, triggers, and INET_CLIENT_ADDR()
function
Details:

I'm encountering an error when using a plpgsql insert trigger to
automatically log the client connection information using
INET_CLIENT_ADDR().  No changes from default install configuration.  Fresh
PG_DATA install.

Here's my test case:


CREATE TYPE SocketAddress AS(
        addr    INET,
        port    INT
);

CREATE TABLE BugTable(
        intValue        int     NOT NULL,
        clientAddr      SocketAddress   NOT NULL
);

CREATE FUNCTION
        BugTable_setClientAddr()
        RETURNS TRIGGER AS $$
BEGIN
        NEW.clientAddr := (INET_CLIENT_ADDR(),INET_CLIENT_PORT());
        RETURN NEW;
END;
$$ LANGUAGE plpgsql;

CREATE TRIGGER BugTable_onInsert_setClientAddr
        BEFORE INSERT
        ON BugTable
        FOR EACH ROW EXECUTE PROCEDURE BugTable_setClientAddr();


$ psql -h localhost
ctrawick=# SELECT version();
                                                                   version
----------------------------------------------------------------------------
-----------------------------------------------------------------
 PostgreSQL 8.0.1 on i686-pc-linux-gnu, compiled by GCC
i686-pc-linux-gnu-gcc (GCC) 3.3.5  (Gentoo Linux 3.3.5-r1, ssp-3.3.2-3,
pie-8.7.7.1)
(1 row)

ctrawick=# \set VERBOSITY verbose
ctrawick=# INSERT INTO BugTable(intValue) VALUES(0);
ERROR:  XX000: could not find block containing chunk 0x83664e8
CONTEXT:  PL/pgSQL function "bugtable_setclientaddr" line 2 at assignment
LOCATION:  AllocSetFree, aset.c:786