Fix a refleak in validate_constant()

Issue #26146.

diff --git a/Python/ast.c b/Python/ast.c
index 5422e9c29b2cb30ff8e8d7da0e564d37331b2879..ecfc14cdf84d8d3f1e7cc77941642580a7be6c56 100644 (file)
--- a/Python/ast.c
+++ b/Python/ast.c
@@ -164,8 +164,10 @@ validate_constant(PyObject *value)
 
             if (!validate_constant(item)) {
                 Py_DECREF(it);
+                Py_DECREF(item);
                 return 0;
             }
+            Py_DECREF(item);
         }
 
         Py_DECREF(it);