Hello,

The function postmodern:connected-p should fail when its argument is a variable bounded to nil? For instance, here is some code using the package :postmodern :

(defun connect-to-database ()
(when (not (connected-p *database*))
    (connect-toplevel *db-name* *db-user* *db-pass* *db-host*)))

This code fails because *database* is nil at first.

If the function cl-postgress:database-open-p was changed into this:

(defun database-open-p (connection)
"Returns a boolean indicating whether the given connection is currently connected."
(and connection
       (connection-socket connection)
       (open-stream-p (connection-socket connection))))

the code above would work as expected.