STINNER Victor <vstin...@python.org> added the comment:
PyType_GenericAlloc() cannot traverse the object since the object members are not initialized yet. For example, dict_traverse() can only be called when PyDict_New() completes. A different approach would be to: * (1) Add PyType_AllocNoTrack(), use it in built-in types, and call _PyObject_GC_TRACK() on the instance once it is fully initialized. * (2) Modify PyType_GenericAlloc() to use a new variant of _PyObject_GC_TRACK() which will not traverse the instance. * (3) Modify _PyObject_GC_TRACK() to traverse the instance. In short, PyType_GenericAlloc() cannot be modified for backward compatibility. Moreover, _PyObject_GC_TRACK() should only be used inside Python internals, since it's part the internal C API. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue40142> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
