Index: Lib/asyncore.py
===================================================================
--- Lib/asyncore.py	(revision 64788)
+++ Lib/asyncore.py	(working copy)
@@ -413,8 +413,12 @@
             self.handle_read()
 
     def handle_connect_event(self):
-        self.connected = True
-        self.handle_connect()
+        err = self.socket.getsockopt(socket.SOL_SOCKET, socket.SO_ERROR)
+        if err != 0:
+            raise socket.error(err, _strerror(err))
+        else:
+            self.handle_connect()
+            self.connected = True
 
     def handle_write_event(self):
         if self.accepting: