Issue #18552: Check return value of PyArena_AddPyObject() in obj2ast_object().

1 files changed, 7 insertions, 3 deletions

diff --git a/Python/Python-ast.c b/Python/Python-ast.c
index 49d19da..afa6d2e 100644
--- a/Python/Python-ast.c
+++ b/Python/Python-ast.c
@@ -704,9 +704,13 @@ static int obj2ast_object(PyObject* obj, PyObject** out, PyArena* arena)
 {
     if (obj == Py_None)
         obj = NULL;
-    if (obj)
-        PyArena_AddPyObject(arena, obj);
-    Py_XINCREF(obj);
+    if (obj) {
+        if (PyArena_AddPyObject(arena, obj) < 0) {
+            *out = NULL;
+            return -1;
+        }
+        Py_INCREF(obj);
+    }
     *out = obj;
     return 0;
 }