fix test case

Author: qunaibit

graalpython/com.oracle.graal.python.test/src/tests/cpyext/test_object.py

@@ -183,21 +183,43 @@ def test_repr(self):
     def test_base_type(self):
         AcceptableBaseType = CPyExtType("AcceptableBaseType", 
                             '''
+                            static PyObject *
+                            TestBase_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
+                            {
+                                return PyType_Type.tp_new(type, args, kwds);
+                            }
                             PyTypeObject TestBase_Type = {
                                 PyVarObject_HEAD_INIT(NULL, 0)
-                                .tp_name = "AcceptableBaseType",
+                                .tp_name = "TestBase",
                                 .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
                             };
+
+                            static int
+                            AcceptableBaseType_traverse(AcceptableBaseTypeObject *self, visitproc visit, void *arg) {
+                                // This helps to avoid setting 'Py_TPFLAGS_HAVE_GC'
+                                // see typeobject.c:inherit_special:241
+                                return 0;
+                            }
+
+                            static int
+                            AcceptableBaseType_clear(AcceptableBaseTypeObject *self) {
+                                // This helps to avoid setting 'Py_TPFLAGS_HAVE_GC'
+                                // see typeobject.c:inherit_special:241
+                                return 0;
+                            }
                              ''',
+                             tp_traverse="(traverseproc)AcceptableBaseType_traverse",
+                             tp_clear="(inquiry)AcceptableBaseType_clear",
                              ready_code='''
-                                    TestBase_Type.tp_base = &PyType_Type;
-                                    if (PyType_Ready(&TestBase_Type) < 0)
-                                        return NULL;
-                                    Py_TYPE(&AcceptableBaseTypeType) = &TestBase_Type; 
-                                    AcceptableBaseTypeType.tp_base = &PyType_Type;
-                            ''',
+                                TestBase_Type.tp_base = &PyType_Type;
+                                if (PyType_Ready(&TestBase_Type) < 0)
+                                    return NULL;
+                                    
+                                Py_TYPE(&AcceptableBaseTypeType) = &TestBase_Type; 
+                                AcceptableBaseTypeType.tp_base = &PyType_Type;''',
                              )
-        class AcceptableSubClass(AcceptableBaseType):
+        class Foo(AcceptableBaseType):
+            # This shouldn't fail
             pass
 
     def test_new(self):