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gh-104619: never leak comprehension locals to outer locals() (#104637)

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Carl Meyer 2023-05-18 19:50:24 -06:00 • committed by GitHub
parent 86e6f16ccb
commit 70c7796477
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2 changed files with 32 additions and 21 deletions
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13
Lib/test/test_listcomps.py
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@ -516,6 +516,19 @@ class ListComprehensionTest(unittest.TestCase):
"""
self._check_in_scopes(code, {"a": [1]}, scopes=["function"])
def test_no_leakage_to_locals(self):
code = """
def b():
[a for b in [1] for _ in []]
return b, locals()
r, s = b()
x = r is b
y = list(s.keys())
"""
self._check_in_scopes(code, {"x": True, "y": []}, scopes=["module"])
self._check_in_scopes(code, {"x": True, "y": ["b"]}, scopes=["function"])
self._check_in_scopes(code, raises=NameError, scopes=["class"])
__test__ = {'doctests' : doctests}