We need to improve the error handling in the code snippet below.

            try:
                reduce_data = obj.__reduce__()
            except BaseException as e:
                raise UnhashableTypeError(e, obj)

Objects can define their own __getstate__ method which get called by __reduce__. Therefore a bug could occur in this __getstate__ call, the error for which should bubble up to the user.

Currently we're suppressing this error message and type.