@@ -2658,13 +2658,15 @@ get_basic_static_type(PyObject *self, PyObject *args)
     PyTypeObject *cls = &BasicStaticTypes[num_basic_static_types_used++];
 
     if (base != NULL) {
-        cls->tp_base = (PyTypeObject *)Py_NewRef(base);
         cls->tp_bases = Py_BuildValue("(O)", base);
         if (cls->tp_bases == NULL) {
             return NULL;
         }
+        cls->tp_base = (PyTypeObject *)Py_NewRef(base);
     }
     if (PyType_Ready(cls) < 0) {
+        Py_DECREF(cls->tp_bases);
+        Py_DECREF(cls->tp_base);
         return NULL;
     }
     return (PyObject *)cls;
Original file line number	Diff line number	Diff line change
`@@ -2658,13 +2658,15 @@ get_basic_static_type(PyObject self, PyObject args)`
`2658`	`2658`	`PyTypeObject *cls = &BasicStaticTypes[num_basic_static_types_used++];`
`2659`	`2659`
`2660`	`2660`	`if (base != NULL) {`
`2661`		`- cls->tp_base = (PyTypeObject *)Py_NewRef(base);`
`2662`	`2661`	`cls->tp_bases = Py_BuildValue("(O)", base);`
`2663`	`2662`	`if (cls->tp_bases == NULL) {`
`2664`	`2663`	`return NULL;`
`2665`	`2664`	`}`
	`2665`	`+ cls->tp_base = (PyTypeObject *)Py_NewRef(base);`
`2666`	`2666`	`}`
`2667`	`2667`	`if (PyType_Ready(cls) < 0) {`
	`2668`	`+ Py_DECREF(cls->tp_bases);`
	`2669`	`+ Py_DECREF(cls->tp_base);`
`2668`	`2670`	`return NULL;`
`2669`	`2671`	`}`
`2670`	`2672`	`return (PyObject *)cls;`