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bpo-40489: Add test case for dict contain use after free #19906

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Merged
merged 2 commits into from
May 4, 2020
Merged

bpo-40489: Add test case for dict contain use after free #19906

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bpo-40489: Add test case for dict contain use after free
corona10 May 4, 2020
f96608a
Update Lib/test/test_dict.py
corona10 May 4, 2020
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13 changes: 13 additions & 0 deletions Lib/test/test_dict.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1324,6 +1324,19 @@ def __eq__(self, other):
d = {0: set()}
(0, X()) in d.items()

def test_dict_contain_use_after_free(self):
# bpo-40489
class S(str):
def __eq__(self, other):
d.clear()
return NotImplemented

def __hash__(self):
return hash('test')

d = {S(): 'value'}
self.assertFalse('test' in d)

def test_init_use_after_free(self):
class X:
def __hash__(self):
Expand Down