637     PyObject *fast_memo;  member
1105     self->fast_memo = NULL;  in _Pickler_New()
1839         if (self->fast_memo == NULL) {  in fast_save_enter()
1840             self->fast_memo = PyDict_New();  in fast_save_enter()
1841             if (self->fast_memo == NULL) {  in fast_save_enter()
1851         if (PyDict_GetItemWithError(self->fast_memo, key)) {  in fast_save_enter()
1865         if (PyDict_SetItem(self->fast_memo, key, Py_None) < 0) {  in fast_save_enter()
1882         if (PyDict_DelItem(self->fast_memo, key) < 0) {  in fast_save_leave()
4270     Py_XDECREF(self->fast_memo);  in Pickler_dealloc()
4283     Py_VISIT(self->fast_memo);  in Pickler_traverse()
4294     Py_CLEAR(self->fast_memo);  in Pickler_clear()
4368     self->fast_memo = NULL;  in _pickle_Pickler___init___impl()