From b54ca99835a1992b058401f5a1f00fd742f7971d Mon Sep 17 00:00:00 2001
From: AN Long <aisk1988@gmail.com>
Date: Sun, 21 Jun 2026 17:26:37 +0900
Subject: [PATCH] Fix formatfloat() return-value contract in unicode_format.c

---
 Objects/unicode_format.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Objects/unicode_format.c b/Objects/unicode_format.c
index e2790c8c1d4343d..1d6f3f7d9a6f6a0 100644
--- a/Objects/unicode_format.c
+++ b/Objects/unicode_format.c
@@ -159,8 +159,13 @@ formatfloat(PyObject *v,
             return -1;
         }
     }
-    else
+    else {
         *p_output = _PyUnicode_FromASCII(p, len);
+        if (*p_output == NULL) {
+            PyMem_Free(p);
+            return -1;
+        }
+    }
     PyMem_Free(p);
     return 0;
 }