Add some more error checking.

deluge/core/core.py

@@ -157,7 +157,14 @@ class Core(dbus.service.Object):
         for key in keys:
             nkeys.append(str(key))
         # Pickle the status dictionary from the torrent
+        try:
             status = self.torrents[torrent_id].get_status(nkeys)
+        except KeyError:
+            # The torrent_id is not found in the torrentmanager, so return None
+            status = None
+            status.pickle.dumps(status)
+            return status
+        
         # Get the leftover fields and ask the plugin manager to fill them
         leftover_fields = list(set(nkeys) - set(status.keys()))
         if len(leftover_fields) > 0:

deluge/plugins/queue/queue/core.py

@@ -78,7 +78,10 @@ class Core(dbus.service.Object):
     
     ## Status field function ##
     def status_field_queue(self, torrent_id):
+        try:
             return self.queue[torrent_id]+1
+        except TypeError:
+            return None
         
     ## Queueing functions ##
     @dbus.service.method(dbus_interface="org.deluge_torrent.Deluge.Queue", 

deluge/plugins/queue/queue/torrentqueue.py

@@ -44,7 +44,10 @@ class TorrentQueue:
 
     def __getitem__(self, torrent_id):
         """Return the queue position of the torrent_id"""
+        try:
             return self.queue.index(torrent_id)
+        except ValueError:
+            return None
         
     def load_state(self):
         """Load the queue state"""

deluge/ui/gtkui/torrentview.py

@@ -199,8 +199,11 @@ class TorrentView(listview.ListView):
     def get_selected_torrents(self):
         """Returns a list of selected torrents or None"""
         torrent_ids = []
+        try:
             paths = self.treeview.get_selection().get_selected_rows()[1]
-        
+        except AttributeError:
+            # paths is likely None .. so lets return None
+            return None
         try:
             for path in paths:
                 torrent_ids.append(