human
Solve the following python programming problem given the following code:
def _subscribe(self, observer) : 
    previous_should_fire = [None] 
    queue = [] 
    def result_selector(data, should_fire = False) : 
        return { 
            'data' : data, 
            'should_fire' : should_fire, 
} 
def on_next(results) : 
        should_fire = results.get ('should_fire') 
        if ((not (previous_should_fire [0] is None)) and (should_fire != previous_should_fire [0])) : 
            previous_should_fire [0] = should_fire 
            if should_fire : 
                while len (queue) : 
                    b = queue.pop (0) 
                    observer.on_next (b) 
else : 
            previous_should_fire [0] = should_fire 
            if should_fire : 
                observer.on_next (results ['data']) 
else : 
                queue.append (results ['data']) 
def on_error(err) : 
        while len (queue) : 
            observer.on_next (queue.pop (0)) 
observer.on_error (err) 
def on_completed() : 
        while len (queue) : 
            observer.on_next (queue.pop (0)) 
observer.on_completed () 
subscription = combine_latest_source (self.source, self.pauser.distinct_until_changed ().start_with (False), result_selector).subscribe (on_next, on_error, on_error) 
    return subscription 

    
    

    Fix the buggy line: subscription = combine_latest_source (self.source, self.pauser.distinct_until_changed ().start_with (False), result_selector).subscribe (on_next, on_error, on_error)
assistant
#Here is Python program to fix the buggy line: subscription = combine_latest_source (self.

subscription = combine_latest_source (self.source, self.pauser.distinct_until_changed ().start_with (False), result_selector).subscribe (on_next, on_error, on_completed)