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GH-117195: Avoid assertion error in `object.__sizeof__` by markshannon · Pull Request #117220 · python/cpython · GitHub

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GH-117195: Avoid assertion error in object.__sizeof__ #117220

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Merged
markshannon merged 5 commits into from
May 23, 2024
+9 −2
Conversation 6 Commits 5 Checks 0 Files changed 3
Merged

GH-117195: Avoid assertion error in object.__sizeof__ #117220

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3423388
Avoid assertion error in object.__sizeof__
markshannon Mar 25, 2024
7374ca0
Add test
markshannon Mar 25, 2024
4078e91
Fix mangled name
markshannon Mar 25, 2024
12f7738
Fix typo
markshannon May 21, 2024
6078da5
Merge branch 'main' into object_sizeof_int
markshannon May 22, 2024
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2 changes: 2 additions & 0 deletions Lib/test/test_long.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1639,6 +1639,8 @@ class MyInt(int):
MyInt.__basicsize__ + MyInt.__itemsize__ * ndigits
)

# GH-117195 -- This shouldn't crash
object.__sizeof__(1)

if __name__ == "__main__":
unittest.main()
2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Core and Builtins/2024-03-25-15-07-01.gh-issue-117195.OWakgD.rst
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@@ -0,0 +1,2 @@
Avoid assertion failure for debug builds when calling
``object.__sizeof__(1)``
7 changes: 5 additions & 2 deletions Objects/typeobject.c
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Original file line number Diff line number Diff line change
Expand Up @@ -7144,8 +7144,11 @@ object___sizeof___impl(PyObject *self)

res = 0;
isize = Py_TYPE(self)->tp_itemsize;
if (isize > 0)
res = Py_SIZE(self) * isize;
if (isize > 0) {
/* This assumes that ob_size is valid if tp_itemsize is not 0,
which isn't true for PyLongObject. */
res = _PyVarObject_CAST(self)->ob_size * isize;
}
res += Py_TYPE(self)->tp_basicsize;

return PyLong_FromSsize_t(res);
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