Traceback (most recent call last):
      File "/home/gather/Gather/local/lib/python2.7/site-packages/flask/app.py", line 1817, in wsgi_app
        response = self.full_dispatch_request()
      File "/home/gather/Gather/local/lib/python2.7/site-packages/tingyun/armoury/ammunition/function_tracker.py", line 81, in literal_wrapper
        return wrapped(*args, **kwargs)
      File "/home/gather/Gather/local/lib/python2.7/site-packages/flask/app.py", line 1477, in full_dispatch_request
        rv = self.handle_user_exception(e)
      File "/home/gather/Gather/local/lib/python2.7/site-packages/tingyun/armoury/ammunition/flask_tracker.py", line 59, in handle_exception_wrapper
        return wrapped(*args, **kwargs)
      File "/home/gather/Gather/local/lib/python2.7/site-packages/flask/app.py", line 1381, in handle_user_exception
        reraise(exc_type, exc_value, tb)
      File "/home/gather/Gather/local/lib/python2.7/site-packages/flask/app.py", line 1473, in full_dispatch_request
        rv = self.preprocess_request()
      File "/home/gather/Gather/local/lib/python2.7/site-packages/flask/app.py", line 1666, in preprocess_request
        rv = func()
      File "/home/gather/Gather/gather/app.py", line 67, in load_user
        g.user = get_current_user()
      File "/home/gather/Gather/gather/account/utils.py", line 44, in get_current_user
        user = Account.query.get(int(session["id"]))
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/orm/query.py", line 809, in get
        return loading.load_on_ident(self, key)
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/orm/loading.py", line 230, in load_on_ident
        return q.one()
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/orm/query.py", line 2348, in one
        ret = list(self)
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/orm/query.py", line 2391, in __iter__
        return self._execute_and_instances(context)
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/orm/query.py", line 2404, in _execute_and_instances
        close_with_result=True)
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/orm/query.py", line 2395, in _connection_from_session
        **kw)
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 843, in connection
        close_with_result=close_with_result)
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 847, in _connection_for_bind
        return self.transaction._connection_for_bind(engine)
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 315, in _connection_for_bind
        conn = bind.contextual_connect()
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1698, in contextual_connect
        self.pool.connect(),
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/pool.py", line 324, in connect
        return _ConnectionFairy._checkout(self)
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/pool.py", line 608, in _checkout
        fairy = _ConnectionRecord.checkout(pool)
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/pool.py", line 425, in checkout
        rec = pool._do_get()
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/pool.py", line 928, in _do_get
        return self._create_connection()
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/pool.py", line 277, in _create_connection
        return _ConnectionRecord(self)
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/pool.py", line 401, in __init__
        exec_once(self.connection, self)
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/event/attr.py", line 238, in exec_once
        self(*args, **kw)
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/event/attr.py", line 247, in __call__
        fn(*args, **kw)
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/engine/strategies.py", line 156, in on_connect
        do_on_connect(conn)
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/dialects/postgresql/psycopg2.py", line 439, in on_connect
        fn(conn)
      File "/home/gather/Gather/local/lib/python2.7/site-packages/sqlalchemy/dialects/postgresql/psycopg2.py", line 413, in on_connect
        extensions.register_type(extensions.UNICODE, conn)
    TypeError: argument 2 must be a connection, cursor or None