pg_buffercache causes assertion failure

I'm not sure when this broke, but using contrib/pg_buffercache with
the latest HEAD causes an assertion failure:

test=# SELECT * FROM pg_buffercache;
server closed the connection unexpectedly
This probably means the server terminated abnormally
before or while processing the request.
The connection to the server was lost. Attempting reset: Failed.

Here are the log entries:

TRAP: FailedAssertion("!(var->vartypmod == att_tup->atttypmod)", File: "execScan.c", Line: 220)
<2005-05-29 09:14:54 MDT 11356> LOG: server process (PID 17300) was terminated by signal 6
<2005-05-29 09:14:54 MDT 11356> LOG: terminating any other active server processes

--
Michael Fuhr
http://www.fuhr.org/~mfuhr/