While debugging #5376, we noticed that attempting to access a comment which doesn't exist causes a server error. Ideally, we'd catch this and throw a 404 or just show the media page instead.

Here's an example to illustrate the issue, but these links may go away soon :)

There's an actual comment at this link. Following it works as expected.

​http://pumpdev.goblinrefuge.com/u/ayleph/m/doge/c/23/#comment

Here I fat-fingered manually typing in the link, and I get a server error.

​http://pumpdev.goblinrefuge.com/u/ayleph/m/doge/c/123/#comment

Here's what the error looks like.

Error - <type 'exceptions.AttributeError'>: 'NoneType' object has no attribute 'id'
URL: http://pumpdev.goblinrefuge.com/u/ayleph/m/doge/c/28/
File '/path/to/mediagoblin/lib/python2.7/site-packages/Paste-1.7.5.1-py2.7.egg/paste/exceptions/errormiddleware.py', line 144 in __call__
  app_iter = self.application(environ, sr_checker)
File '/path/to/mediagoblin/mediagoblin/app.py', line 342 in __call__
  return self.call_backend(environ, start_response)
File '/path/to/mediagoblin/lib/python2.7/site-packages/Werkzeug-0.9.6-py2.7.egg/werkzeug/wsgi.py', line 588 in __call__
  return self.app(environ, start_response)
File '/path/to/mediagoblin/mediagoblin/app.py', line 276 in call_backend
  return self._finish_call_backend(request, environ, start_response)
File '/path/to/mediagoblin/mediagoblin/app.py', line 318 in _finish_call_backend
  response = controller(request)
File '/path/to/mediagoblin/mediagoblin/decorators.py', line 47 in wrapper
  return controller(request, *args, **kwargs)
File '/path/to/mediagoblin/mediagoblin/decorators.py', line 210 in wrapper
  return controller(request, media=media, *args, **kwargs)
File '/path/to/mediagoblin/mediagoblin/decorators.py', line 170 in wrapper
  return controller(request, page=page, *args, **kwargs)
File '/path/to/mediagoblin/mediagoblin/user_pages/views.py', line 135 in media_home
  mark_comment_notification_seen(comment_id, request.user)
File '/path/to/mediagoblin/mediagoblin/notifications/__init__.py', line 75 in mark_comment_notification_seen
  obj_pk=comment.id,
AttributeError: 'NoneType' object has no attribute 'id'

diff --git a/mediagoblin/decorators.py b/mediagoblin/decorators.py
index a2c49bc..daeddb3 100644
--- a/mediagoblin/decorators.py
+++ b/mediagoblin/decorators.py
@@ -416,7 +416,7 @@ def oauth_required(controller):
                 )
 
         if not valid:
-            error = "Invalid oauth prarameter."
+            error = "Invalid oauth parameter."
             return json_response({"error": error}, status=400)
 
         # Fill user if not already

The "Report" link under comments goes to a 404 page. I'm not sure if it used to actually go somewhere.