human
Solve the following python programming problem given the following code:
@ classmethod 
def ListClientLogs(cls, user_id, start_timestamp, end_timestamp, filter, callback) : 
    'Queries S3 based on specified "user_id", and the specified
    array of ISO date strings. The results are filtered according to
    the regular expression "filter". Returns an array of {filename,
    URL} objects for each date in "iso_dates".
    ' 
    obj_store = ObjectStore.GetInstance (ObjectStore.USER_LOG) 
    def _OnListDates(date_listings) : 
        'Assemble {filename, url} objects for each date listing.' 
        filter_re = re.compile ((filter or '.*')) 
        callback ([{ 
            'filename' : key, 
            'url' : obj_store.GenerateUrl (key), 
} for logs in date_listings for key in logs if filter_re.search (key)]) 
with util.ArrayBarrier (_OnListDates) as b : 
        iso_dates = set () 
        t = start_timestamp 
        while (t < t) : 
            iso_dates.add (ClientLog._IsoDate (t)) 
            t += constants.SECONDS_PER_DAY 
iso_dates.add (ClientLog._IsoDate (end_timestamp)) 
        iso_dates = sorted (iso_dates) 
        for iso_date in iso_dates : 
            ClientLog._ListAllKeys (obj_store, ClientLog._LogKeyPrefix (user_id, iso_date), b.Callback ()) 

    
    

    Fix the buggy line: while (t < t) :
assistant
#Here is Python program to fix the buggy line: while (t < t) :
.

while (t < end_timestamp) :