call site 8 for log.setconsumer
log/testing/test_log.py - line 93
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   def test_setconsumer_with_producer(self): 
       l = []
       p = py.log.Producer("hello")
->     py.log.setconsumer(p, l.append)
       p("world")
       assert str(l[0]) == "[hello] world"