https://github.com/python/cpython/commit/50f82d062b3b59a09d6b63648df22d46f7f2b010
commit: 50f82d062b3b59a09d6b63648df22d46f7f2b010
branch: main
author: Benedikt Johannes <[email protected]>
committer: kumaraditya303 <[email protected]>
date: 2026-03-10T22:03:56+05:30
summary:
gh-145044: avoid calling `Py_DECREF` in `unsafe_object_compare` on immortal
objects (#145045)
files:
M Objects/listobject.c
diff --git a/Objects/listobject.c b/Objects/listobject.c
index 62d04ab150a77a..1fcedd3a28c91b 100644
--- a/Objects/listobject.c
+++ b/Objects/listobject.c
@@ -2795,11 +2795,12 @@ unsafe_object_compare(PyObject *v, PyObject *w,
MergeState *ms)
if (PyBool_Check(res_obj)) {
res = (res_obj == Py_True);
+ assert(_Py_IsImmortal(res_obj));
}
else {
res = PyObject_IsTrue(res_obj);
+ Py_DECREF(res_obj);
}
- Py_DECREF(res_obj);
/* Note that we can't assert
* res == PyObject_RichCompareBool(v, w, Py_LT);
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