From 50f82d062b3b59a09d6b63648df22d46f7f2b010 Mon Sep 17 00:00:00 2001 From: Benedikt Johannes Date: Tue, 10 Mar 2026 17:33:56 +0100 Subject: [PATCH] gh-145044: avoid calling `Py_DECREF` in `unsafe_object_compare` on immortal objects (#145045) --- Objects/listobject.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/Objects/listobject.c b/Objects/listobject.c index 62d04ab150a7..1fcedd3a28c9 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); -- 2.47.3