Bug #645: core dump while \df in trasaction

Jean-Luc Lachance (jllachan@nsd.ca) reports a bug with a severity of 3
The lower the number the more severe it is.

Short Description
core dump while \df in trasaction

Long Description
I get a core dump when it try:

begin; truncate table r;
\df

Also, I would be nice to have a different prompt while in a transaction.

nsd=# select version();
version
-------------------------------------------------------------
PostgreSQL 7.2b5 on i686-pc-linux-gnu, compiled by GCC 2.96

Sample Code
nsd=# begin; truncate table r;
BEGIN
ERROR: TRUNCATE TABLE cannot run inside a transaction block
nsd=# \df
NOTICE: current transaction is aborted, queries ignored until end of transaction block
Floating point exception (core dumped)

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