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gh-139817: Fix refleak in TypeAliasType(qualname=non_string) by encukou · Pull Request #140197 · python/cpython · GitHub

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gh-139817: Fix refleak in TypeAliasType(qualname=non_string) #140197

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Merged
encukou merged 2 commits into from
Oct 16, 2025
Conversation 5 Commits 2 Checks 41 Files changed
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gh-139817: Fix refleak in TypeAliasType(qualname=non_string) #140197

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gh-139817: Fix refleak in TypeAliasType(qualname=non_string)
encukou Oct 16, 2025
11d3641
Move obtaining module
encukou Oct 16, 2025
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10 changes: 5 additions & 5 deletions Objects/typevarobject.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2123,11 +2123,6 @@ typealias_new_impl(PyTypeObject *type, PyObject *name, PyObject *value,
return NULL;
}

PyObject *module = caller();
if (module == NULL) {
return NULL;
}

if (qualname == NULL || qualname == Py_None) {
// If qualname was not set directly, we use name instead.
qualname = name;
Expand All @@ -2138,6 +2133,11 @@ typealias_new_impl(PyTypeObject *type, PyObject *name, PyObject *value,
}
}

efimov-mikhail Oct 16, 2025 •
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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

IMO, it's better to place obtaining of module after qualname related if-block and remove a call of Py_DECREF(module).

PyObject *module = caller();
if (module == NULL) {
return NULL;
}

PyObject *ta = (PyObject *)typealias_alloc(
name, qualname, checked_params, NULL, value, module);
Py_DECREF(module);
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