From bb98a0afd8598ce80f0e6d3f768b128eab68f40a Mon Sep 17 00:00:00 2001
From: "Miss Islington (bot)"
 <31488909+miss-islington@users.noreply.github.com>
Date: Tue, 19 Nov 2024 19:19:39 +0100
Subject: [PATCH] [3.13] gh-126991: Fix reference leak in loading pickle's
 opcode BUILD (GH-126990) (GH-127018)

If PyObject_SetItem() fails in the `load_build()` function of _pickle.c, no DECREF for the `dict` variable.
(cherry picked from commit 29cbcbd73bbfd8c953c0b213fb33682c289934ff)

Co-authored-by: Justin Applegate <70449145+Legoclones@users.noreply.github.com>
---
 Modules/_pickle.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Modules/_pickle.c b/Modules/_pickle.c
index d20f3e5097a3a0..9bb3947e0967a4 100644
--- a/Modules/_pickle.c
+++ b/Modules/_pickle.c
@@ -6659,6 +6659,7 @@ load_build(PickleState *st, UnpicklerObject *self)
             }
             if (PyObject_SetItem(dict, d_key, d_value) < 0) {
                 Py_DECREF(d_key);
+                Py_DECREF(dict);
                 goto error;
             }
             Py_DECREF(d_key);