Trap some more odd errors to assist in my tracking down their origin.

src/cmdhandler.py

@@ -160,7 +160,14 @@ def match_exits(command):
     """
     # If we're not logged in, don't check exits.
     source_object = command.source_object
-    exits = source_object.get_location().get_contents(filter_type=defines_global.OTYPE_EXIT)
+    location = source_object.get_location()
+    
+    if location == None:
+        logger.log_errmsg("cmdhandler.match_exits(): Object '%s' no location." % 
+                          source_object)
+        return
+    
+    exits = location.get_contents(filter_type=defines_global.OTYPE_EXIT)
     Object = ContentType.objects.get(app_label="objects", 
                                      model="object").model_class()
     exit_matches = Object.objects.list_search_object_namestr(exits, 

src/objects/models.py

@@ -15,6 +15,7 @@ from src import scripthandler
 from src import defines_global
 from src import ansi
 from src import session_mgr
+from src import logger
 # Import as the absolute path to avoid local variable clashes.
 import src.flags
 from src.util import functions_general
@@ -225,7 +226,11 @@ class Object(models.Model):
         """
         Returns the player object's account object (User object).
         """
-        return User.objects.get(id=self.id)
+        try:
+            return User.objects.get(id=self.id)
+        except User.DoesNotExist:
+            logger.log_errmsg("No account match for object id: %s" % self.id)
+            return None
     
     def is_staff(self):
         """

src/session.py

@@ -107,7 +107,11 @@ class SessionProtocol(StatefulTelnetProtocol):
         pobject = self.get_pobject()
         if pobject:
             pobject.set_flag("CONNECTED", False)
-            pobject.get_location().emit_to_contents("%s has disconnected." % (pobject.get_name(show_dbref=False),), exclude=pobject)
+            
+            location = pobject.get_location()
+            if location != None:
+                location.emit_to_contents("%s has disconnected." % (pobject.get_name(show_dbref=False),), exclude=pobject)
+
             uaccount = pobject.get_user_account()
             uaccount.last_login = datetime.now()
             uaccount.save()