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bpo-44184: Fix subtype_dealloc() for freed type #26274

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Merged
vstinner merged 4 commits into from
May 21, 2021
Merged

bpo-44184: Fix subtype_dealloc() for freed type #26274

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5bcd788
bpo-44184: Fix subtype_dealloc() for freed type
vstinner May 20, 2021
454e996
Add an unit test
vstinner May 21, 2021
b670383
_PyMem_IsPtrFreed() argument is now const
vstinner May 21, 2021
efd45ad
Port the unit test to Windows
vstinner May 21, 2021
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Port the unit test to Windows
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@vstinner
vstinner committed May 21, 2021
commit efd45ad7881c4c1b364637f970b33cc5aeeb301d
14 changes: 6 additions & 8 deletions Lib/test/test_gc.py
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Expand Up @@ -1371,22 +1371,20 @@ def test_ast_fini(self):
# _PyAST_Fini() which clears references to AST types.
code = textwrap.dedent("""
import ast
import builtins
import sys
import os
import codecs

# Small AST tree to keep their AST types alive
tree = ast.parse("def f(x, y): return 2*x-y")
x = [tree]
x.append(x)

# Put the cycle somewhere to survive until the last GC collection.
# Fork callbacks are only cleared at the end of
# Codec search functions are only cleared at the end of
# interpreter_clear().
def callback():
pass
callback.a = x
os.register_at_fork(after_in_child=callback)
def search_func(encoding):
return None
search_func.a = x
codecs.register(search_func)
""")
assert_python_ok("-c", code)

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