Lib/test/leakers/test_selftype.py


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# Reference cycles involving only the ob_type field are rather uncommon
# but possible.  Inspired by SF bug 1469629.

import gc

def leak():
    class T(type):
        pass
    class U(type, metaclass=T):
        pass
    U.__class__ = U
    del U
    gc.collect(); gc.collect(); gc.collect()