This test assumes that a nonblocking connect to a closed port will
never fail, the failure will always occur when trying to read from the
socket.

--- tests/socket.tst.orig	Wed Nov 26 01:10:25 2008
+++ tests/socket.tst	Fri Jul 30 11:16:17 2010
@@ -515,10 +515,13 @@ T
 ;; no one should be listening on 12345
 ;; <http://article.gmane.org/gmane.lisp.clisp.general/12286>
 (socket:socket-connect 12345 "localhost" :timeout 30) ERROR ; ECONNREFUSED
-(open-stream-p (setq *socket-1* (socket:socket-connect
-                                 12345 "localhost" :timeout 0))) T
-(read-line *socket-1*) ERROR ; ECONNREFUSED
-(close *socket-1*) T
+(and (setq *socket-1* nil
+           *socket-1* (socket:socket-connect
+                       12345 "localhost" :timeout 0))
+     (open-stream-p *socket-1*)
+     (read-line *socket-1*)) ERROR ; ECONNREFUSED
+(or (null *socket-1*)
+    (close *socket-1*)) T
 
 (let ((interfaces '(nil "localhost" "0.0.0.0" "127.0.0.1")))
   (mapcar (lambda (i)