Crashes on cpython 3.10

[jojje]

Repro:

1. python crash_test.py
2. python -m pydump crash_test.py.dump

Output:

python -m pydump crash_test.py.dump
Starting pdb...
Traceback (most recent call last):
  File "C:\app\anaconda3\envs\default\lib\runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "C:\app\anaconda3\envs\default\lib\runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "C:\dev\3rd\pydump\pydump.py", line 312, in <module>
    sys.exit(main() or 0)
  File "C:\dev\3rd\pydump\pydump.py", line 306, in main
    return debug_dump(
  File "C:\dev\3rd\pydump\pydump.py", line 114, in debug_dump
    post_mortem_func(tb)
  File "C:\app\anaconda3\envs\default\lib\pdb.py", line 1639, in post_mortem
    p.interaction(None, t)
  File "C:\app\anaconda3\envs\default\lib\pdb.py", line 351, in interaction
    if self.setup(frame, traceback):
  File "C:\app\anaconda3\envs\default\lib\pdb.py", line 214, in setup
    lineno = lasti2lineno(tb.tb_frame.f_code, tb.tb_lasti)
  File "C:\app\anaconda3\envs\default\lib\pdb.py", line 117, in lasti2lineno
    linestarts = list(dis.findlinestarts(code))
  File "C:\app\anaconda3\envs\default\lib\dis.py", line 458, in findlinestarts
    for start, end, line in code.co_lines():
AttributeError: 'FakeCode' object has no attribute 'co_lines'