pg_connect dumps core

Moin,

I have problems with tclsh8.3, libpgtcl.so and pg_connect. What
is wrong with this simple code:

load libpgtcl.so
pg_connect db

This gives me an Segmentation Fault and dumps core under FreeBSD 4.2.
Are there known problems? Pgaccess works without any problems and 
communicates perfect with the db. Ich I call pg_connect with a wrong
db name the function gives me an error message. I use PostgreSQL 7.0.3.

Here the tclsh session:

tclsh8.3
% load libpgtcl.so
% pg_connect m3
Connection to database failed
FATAL 1:  Database "m3" does not exist in the system catalog.
% pg_connect m2
Segmentation fault (core dumped)

in postgresql errlog there are:

FATAL 1:  Database "m3" does not exist in the system catalog.
pq_recvbuf: unexpected EOF on client connection 

Many thanks
Matthias