Python 3.11 format_tb breaks with tblib Traceback object

[yogevyuval]

We were using tblib on python 3.8 for a long time, and calling formet_tb (from traceback import format_tbv) on the traceback objects.

The same code breaks on Python 3.11, since in Python3.11 the format_tb functions tries to access tb_lasti, which is not saved on the tblib object along with other attributes like co_positions in the f_code, crashing with the following error:

tb = <tblib.Traceback object at 0x7f0ec30db010>

    def _walk_tb_with_full_positions(tb):
        # Internal version of walk_tb that yields full code positions including
        # end line and column information.
        while tb is not None:
>           positions = _get_code_position(tb.tb_frame.f_code, tb.tb_lasti)
E           AttributeError: 'Traceback' object has no attribute 'tb_lasti'

Is this something that can be supported with tblib?