Plan 9 from Bell Labs’s /usr/web/sources/contrib/jas/root/sys/lib/python2.7/test/leakers/test_dictself.py
'''Test case for "self.__dict__ = self" circular reference bug (#1469629)''' import gc class LeakyDict(dict): pass def leak(): ld = LeakyDict() ld.__dict__ = ld del ld gc.collect(); gc.collect(); gc.collect()