psql doesn't reuse -p after backend fail

hi,
pg version: 9.0.5 - head from 9.0 branch in git.

ran psql with specyfying port:
psql -p 4329 -U postgres -d some_database

then I run query which breaks backend:

=# select * from categories limit 1;
The connection to the server was lost. Attempting reset: Failed.
!>

When I'll try to re-issue \c some_database now, I got:

!> \c some_database
could not connect to server: No such file or directory
Is the server running locally and accepting
connections on Unix domain socket "/tmp/.s.PGSQL.5432"?
!>

Clearly it is looking for socket on port 5432, which is bad, because I
explicitly specified the port to be 4329.

before backend crash, \c works normally.

Best regards,

depesz

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