human
Solve the following python programming problem given the following code:
def __call__(self) : 
    def cb(result) : 
        if self.running : 
            self._scheduleFrom (self.clock.seconds ()) 
else : 
            (d, self._deferred) = (self._deferred, None) 
            d.callback (self) 
def eb(failure) : 
        self.running = False 
        (d, self._deferred) = (self._deferred, None) 
        d.errback (failure) 
self.call = None 
    d = defer.maybeDeferred (self.f, * self.a, ** self.kw) 
    d.addCallback (cb) 
    d.addErrback (d) 

    
    

    Fix the buggy line: d.addErrback (d)
assistant
#Here is Python program to fix the buggy line: d.

d.addErrback (def eb()