human
Solve the following python programming problem given the following code:
def render_GET(self, request) : 
    Type = 'application/x-pickle.python' 
    def _render(result, r) : 
        if r.finished : 
            return 
r.setHeader ('Content-Type', Type) 
        r.setHeader ('Content-Length', str (len (result))) 
        r.setHeader ('Pragma', 'no-cache') 
        r.setHeader ('Cache-Control', 'no-cache') 
        r.write (result) 
        r.finish () 
d = self._serialize_objects (request) 
    d.addCallback (_render, d) 
    d.addErrback ((lambda x : ((gremlin_log (x.getTraceback ()) and x) or x))) 
    return server.NOT_DONE_YET 

    
    

    Fix the buggy line: d.addCallback (_render, d)
assistant
#Here is Python code to fix the buggy line: d.

d.addCallback (_render, request)