pg_dump 8.0.3 failing against PostgreSQL 7.3.2

I am experiencing a problem with dumping one specific database on
a cluster. All 143 other databases dump without giving errors.

The server runs PostgreSQL 7.3.2 on OpenBSD (I know :). pg_dump
is version 8.0.3 on Windows (upgraded from 8.0.1 which had the
same problem). The error message is:

pg_dump: SQL command failed
pg_dump: Error message from server: ERROR:  Cannot cast type
"unknown" to text
pg_dump: The command was: SELECT proretset, prosrc, probin,
null::text as proargnames, provolatile, proisstrict, prosecdef,
(SELECT lanname FROM pg_catalog.pg_language WHERE oid = prolang)
as lanname FROM pg_catalog.pg_proc WHERE oid =
'8331054'::pg_catalog.oid

Below I have copy pasted the console log which has some
additional information. This bug, or a related one, seems to have
been registered previously as bug #1455
http://archives.postgresql.org/pgsql-bugs/2005-02/msg00021.php

Jochem




> C:\Program Files\PostgreSQL\8.0\bin>psql --version
> psql (PostgreSQL) 8.0.3
>
> C:\Program Files\PostgreSQL\8.0\bin>pg_dump wedstrijdzeilen > "z:\backup\databases\2005-06-06\wedstrijdzeilen.sql"
> Password:
> pg_dump: SQL command failed
> pg_dump: Error message from server: ERROR:  Cannot cast type "unknown" to text
> pg_dump: The command was: SELECT proretset, prosrc, probin, null::text as proargnames, provolatile, proisstrict,
prosecd
> ef, (SELECT lanname FROM pg_catalog.pg_language WHERE oid = prolang) as lanname FROM pg_catalog.pg_proc WHERE oid =
'833
> 1054'::pg_catalog.oid
>
> C:\Program Files\PostgreSQL\8.0\bin>psql wedstrijdzeilen
> Password:
> Welcome to psql 8.0.3, the PostgreSQL interactive terminal.
>
> Type:  \copyright for distribution terms
>        \h for help with SQL commands
>        \? for help with psql commands
>        \g or terminate with semicolon to execute query
>        \q to quit
>
> Warning: Console code page (437) differs from Windows code page (1252)
>          8-bit characters may not work correctly. See psql reference
>          page "Notes for Windows users" for details.
>
> oli=> select version();
>                                version
> ---------------------------------------------------------------------
>  PostgreSQL 7.3.2 on i386-unknown-openbsd3.2, compiled by GCC 2.95.3
> (1 row)
>
> wedstrijdzeilen=> SELECT proretset, prosrc, probin, null::text as proargnames, provolatile, proisstrict, prosecdef,
(SEL
> ECT lanname FROM pg_catalog.pg_language WHERE oid = prolang) as lanname FROM pg_catalog.pg_proc WHERE oid =
'8331054'::p
> g_catalog.oid;
>  proretset |
>
>                                       prosrc
>
>                                                                       | probin | proargnames | provolatile |
proisstrict
>  | prosecdef | lanname
>
-----------+------------------------------------------------------------------------------------------------------------
>
------------------------------------------------------------------------------------------------------------------------
>
------------------------------------------------------------------------------------------------------------------------
>
------------------------------------------------------------------------------------------------------------------------
>
----------------------------------------------------------------------+--------+-------------+-------------+------------
> -+-----------+---------
>  t         |
> SELECT          j.parent_id as id,
>                 (SELECT singular FROM dswz.translations WHERE id = t.name AND language_id = (SELECT
dswz.check_creator_i
> d ($1, $2, $3, $4))),
>                 street,
>                 house_number,
>                 zipcode,
>                 city,
>                 (SELECT singular FROM dswz.translations WHERE id = nations.name AND language_id = (SELECT
dswz.check_cre
> ator_id ($1, $2, $3, $4)))
> FROM            dswz.view_addresses a LEFT JOIN dswz.nations ON country = nations.id,
>                 dswz.joins($1, $2,$3,$4) j,
>                 dswz.object_types t
> WHERE           j.child_id = a.id
> AND             t.id = a.type
> AND             j.cancel_time > now();
>  | -      |             | v           | f           | t         | sql
> (1 row)