1 # Reference cycles involving only the ob_type field are rather uncommon 2 # but possible. Inspired by SF bug 1469629. 3 4 import gc 5 6 def leak(): 7 class T(type): 8 pass 9 class U(type): 10 __metaclass__ = T 11 U.__class__ = U 12 del U 13 gc.collect(); gc.collect(); gc.collect() 14
