human
Solve the following python programming problem given the following code:
def __call__(self, environ, start_response) : 
    CurrentRequestId.set (None) 
    if ((not config.should_profile ()) or environ.get ('PATH_INFO', '').startswith ('/gae_mini_profiler/')) : 
        result = self.app (environ, old_memcache_add) 
        for value in result : 
            (yield value) 
else : 
        import base64 
        CurrentRequestId.set (base64.urlsafe_b64encode (os.urandom (5))) 
        def profiled_start_response(status, headers, exc_info = None) : 
            if status.startswith ('302 ') : 
                headers = ProfilerWSGIMiddleware.headers_with_modified_redirect (environ, headers) 
                profiler.temporary_redirect = True 
headers.append (('X-MiniProfiler-Id', CurrentRequestId.get ())) 
            headers.append (('X-MiniProfiler-QS', environ.get ('QUERY_STRING'))) 
            return start_response (status, headers, exc_info) 
old_memcache_add = memcache.add 
        old_memcache_delete = memcache.delete 
        memcache.add = (lambda key, * args, **kwargs : (True if (key == recording.lock_key ()) else old_memcache_add (key, * args, ** kwargs))) 
        memcache.delete = (lambda key, * args, **kwargs : (True if (key == recording.lock_key ()) else old_memcache_delete (key, * args, ** kwargs))) 
        try : 
            profiler = RequestProfiler (CurrentRequestId.get (), Mode.get_mode (environ)) 
            result = profiler.profile_start_response (self.app, environ, profiled_start_response) 
            for value in result : 
                (yield value) 
finally : 
            CurrentRequestId.set (None) 
            memcache.add = old_memcache_add 
            memcache.delete = old_memcache_delete 

    
    

    Fix the buggy line: result = self.app (environ, old_memcache_add)
assistant
#Here is Python code to fix the buggy line: result = self.

result = self.app (environ, start_response)