Fix reference leak in listiter_reduce_general

eendebakpt · eendebakpt · commit f708b0349b60 · 2026-03-01T10:37:26.000+01:00
diff --git a/Objects/listobject.c b/Objects/listobject.c
@@ -4270,7 +4270,9 @@ listiter_reduce_general(void *_it, int forward)
     }
     /* empty iterator, create an empty list */
     list = PyList_New(0);
-    if (list == NULL)
+    if (list == NULL) {
+        Py_DECREF(iter);
         return NULL;
+    }
     return Py_BuildValue("N(N)", iter, list);
 }

Original file line number	Diff line number	Diff line change
`@@ -4270,7 +4270,9 @@ listiter_reduce_general(void *_it, int forward)`
`4270`	`4270`	`}`
`4271`	`4271`	`/* empty iterator, create an empty list */`
`4272`	`4272`	`list = PyList_New(0);`
`4273`		`- if (list == NULL)`
	`4273`	`+ if (list == NULL) {`
	`4274`	`+ Py_DECREF(iter);`
`4274`	`4275`	`return NULL;`
	`4276`	`+ }`
`4275`	`4277`	`return Py_BuildValue("N(N)", iter, list);`
`4276`	`4278`	`}`