From: Kumar Aditya <kumaraditya@python.org>
Date: Mon, 14 Jul 2025 08:25:31 +0000 (+0530)
Subject: [3.13] gh-109700: fix memory error handling in `PyDict_SetDefault` (#136338) (#136642)
X-Git-Tag: v3.13.6~86
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=823bf76d376f4bbd33876e08ecfba56984170a6d;p=thirdparty%2FPython%2Fcpython.git

[3.13] gh-109700: fix memory error handling in `PyDict_SetDefault` (#136338) (#136642)

gh-109700: fix memory error handling in `PyDict_SetDefault` (#136338)

(cherry picked from commit d22e073d2b49313bbf42d40cbe74afa2b69385df)
---

diff --git a/Misc/NEWS.d/next/Core and Builtins/2025-07-06-14-53-19.gh-issue-109700.KVNQQi.rst b/Misc/NEWS.d/next/Core and Builtins/2025-07-06-14-53-19.gh-issue-109700.KVNQQi.rst
new file mode 100644
index 000000000000..a37f4a510509
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2025-07-06-14-53-19.gh-issue-109700.KVNQQi.rst	
@@ -0,0 +1 @@
+Fix memory error handling in :c:func:`PyDict_SetDefault`.
diff --git a/Objects/dictobject.c b/Objects/dictobject.c
index baac54911f03..69a69e13faef 100644
--- a/Objects/dictobject.c
+++ b/Objects/dictobject.c
@@ -4340,6 +4340,7 @@ dict_setdefault_ref_lock_held(PyObject *d, PyObject *key, PyObject *default_valu
             if (result) {
                 *result = NULL;
             }
+            return -1;
         }
 
         MAINTAIN_TRACKING(mp, key, value);