psql always ends with a SEGV:

Hello,

We are starting to run PGSQL V7.1 on Solaris 7. It seems to work but
psql binary always ends with a SEGV.
Did somebody already see this problem?

> psql test701
Welcome to psql, the PostgreSQL interactive terminal.

Type: \copyright for distribution terms
\h for help with SQL commands
\? for help on internal slash commands
\g or terminate with semicolon to execute query
\q to quit

test701=# \q
Segmentation fault (core dumped)
>

gdb get the following trace:

Program received signal SIGSEGV, Segmentation fault.
0xff363b68 in __do_global_dtors_aux () from
/usr/local/pgsql/lib/libpq.so.2
(gdb) where
#0 0xff363b68 in __do_global_dtors_aux () from
/usr/local/pgsql/lib/libpq.so.2
#1 0xff3728dc in _fini () from /usr/local/pgsql/lib/libpq.so.2
#2 0xff3b9f5c in ?? ()
#3 0xff0a00d0 in _exithandle () from /usr/lib/libc.so.1
#4 0xff116814 in exit () from /usr/lib/libc.so.1

Thanks
RT