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

1 files changed, 7 insertions, 3 deletions

diff --git a/Parser/asdl_c.py b/Parser/asdl_c.py
index 7d586b2558..f5cd8e49be 100755
--- a/Parser/asdl_c.py
+++ b/Parser/asdl_c.py
@@ -862,9 +862,13 @@ 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;
 }