|  | @@ -109,11 +109,16 @@ class test_trace(TraceCase):
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				|  |  |              pass
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				|  |  |          empty.backend = Mock()
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				|  |  |  
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				|  |  | -        sig = {'chord_size': None, 'task': 'empty', 'args': (), 'options': {}, 'subtask_type': None, 'kwargs': {}, 'immutable': False}
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				|  |  | -        callbacks = [
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				|  |  | -            sig,
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				|  |  | -            {'chord_size': None, 'task': 'celery.group', 'args': (), 'options': {}, 'subtask_type': 'group', 'kwargs': {'tasks': (empty(), empty())}, 'immutable': False}
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				|  |  | -        ]
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				|  |  | +        sig = {
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				|  |  | +            'chord_size': None, 'task': 'empty', 'args': (), 'options': {},
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				|  |  | +            'subtask_type': None, 'kwargs': {}, 'immutable': False
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				|  |  | +        }
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				|  |  | +        group_sig = {
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				|  |  | +            'chord_size': None, 'task': 'celery.group', 'args': (),
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				|  |  | +            'options': {}, 'subtask_type': 'group',
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				|  |  | +            'kwargs': {'tasks': (empty(), empty())}, 'immutable': False
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				|  |  | +        }
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				|  |  | +        callbacks = [sig, group_sig]
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				|  |  |  
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				|  |  |          # should not raise an exception
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				|  |  |          self.trace(empty, [], {}, request={'callbacks': callbacks})
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