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