These aren't defined for redacted events so don't crash

synapse/storage/__init__.py

@@ -484,8 +484,10 @@ class DataStore(RoomMemberStore, RoomStore,
 
         for e in events:
             if e.type == 'm.room.name':
+                if 'name' in e.content:
                     name = e.content['name']
             elif e.type == 'm.room.aliases':
+                if 'aliases' in e.content:
                     aliases.extend(e.content['aliases'])
 
         defer.returnValue((name, aliases))