Starting with Python 3.14a3, the following raises a `TypeError`: ```python from abc import ABC import cloudpickle def class_factory(): class Model(ABC): field: int return Model cloudpickle.dumps(model_factory()) """ TypeError: cannot pickle '_abc._abc_data' object when serializing dict item '_abc_impl' when serializing tuple item 0 when serializing cell reconstructor arguments when serializing cell object when serializing tuple item 0 when serializing dict item '__closure__' when serializing tuple item 1 when serializing function state when serializing function object when serializing dict item '__annotate_func__' when serializing tuple item 0 when serializing abc.ABCMeta state when serializing abc.ABCMeta object """ ```