select cash_out('2'); crashes backend on 7.0.2

Hello,

 I was just experimenting, trying to see if I could find a function that
would format a numeric value like 'money' with Postgres 7.0.2. Here's
what happened:

######
cascade=> select cash_out(2);
pqReadData() -- backend closed the channel unexpectedly.
        This probably means the backend terminated abnormally
        before or while processing the request.
We have lost the connection to the backend, so further processing is
impossible.  Terminating.
######

The same thing happened with Postgres 6.5.3. Here's my full version:
PostgreSQL 7.0.2 on i686-pc-linux-gnu, compiled by gcc 2.96

I'm sure if what I tried is even valid input, but I'm guessing this is
not a desired result in any case. :)

Thanks for the great software and good luck with this!

A frequent Postgres user,

  -mark

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