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In the following programs, dict is created in recursive calls. Then a core dump is reported by Python interpreter.
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def test_equal_operator_modifying_operand():
 class X():
 def __del__(DictTest):
 dict_b.clear()
 def __eq__(DictTest, other):
 dict_a.clear()
 return True
 def __hash__(DictTest):
 return 13
 dict_d = {X(): 0}
 class Y():
 def __eq__(DictTest, other):
 dict_d.clear()
 return True
 dict_d = {0: Y()}
 # dict_c = {0: set()}
 test_equal_operator_modifying_operand()
test_equal_operator_modifying_operand()
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