8.4b2 tsearch2 strange error

Hi,

I have encountered strange errors while testing PostgreSQL 8.4 beta2.

SELECT msg_sid FROM msginfo WHERE plainto_tsquery(E'test') @@
body_index;
or
SELECT msg_sid FROM msginfo WHERE to_tsquery(E'test') @@ body_index;

produces following errors:

ERROR:  tuple offset out of range: 0
(occasionally ERROR:  tuple offset out of range: 459)

Here is the table definition:

CREATE TABLE msginfo (       msg_sid BIGSERIAL PRIMARY KEY,       file_size INTEGER,       file_mtime TIMESTAMP,
msg_dateTIMESTAMP,       flags INTEGER,       hdr_from TEXT,       hdr_to TEXT,       hdr_cc TEXT,       hdr_newsgroups
TEXT,      hdr_subject TEXT,       hdr_msgid TEXT UNIQUE NOT NULL,       hdr_inreplyto TEXT,       hdr_references TEXT,
     body_text TEXT,       body_index TSVECTOR
 
);
CREATE INDEX msginfo_msg_date_index ON msginfo (msg_date);
CREATE INDEX msginfo_body_index ON msginfo USING gin (body_index);

and other info:

Ubuntu 8.04
./configure --prefix=/usr/local/pgsql84
initdb -E UTF-8 --no-locale /path/to/database

sylph=# EXPLAIN SELECT msg_sid FROM msginfo WHERE to_tsquery('test') @@ body_index;
QUERYPLAN                                   
 
--------------------------------------------------------------------------------
-Bitmap Heap Scan on msginfo  (cost=4.59..8.61 rows=1 width=8)  Recheck Cond: (to_tsquery('test'::text) @@ body_index)
-> Bitmap Index Scan on msginfo_body_index  (cost=0.00..4.59 rows=1 width=0)        Index Cond:
(to_tsquery('test'::text)@@ body_index)
 
(4 rows)
--
Tatsuo Ishii
SRA OSS, Inc. Japan