builtins.ZeroDivisionError: integer division or modulo by zero
/usr/local/lib/python3.10/site-packages/twisted/internet/defer.py:858 in _runCallbacks
857                        #    complaint here.
858                        current.result = callback(  # type: ignore[misc]
859                            current.result, *args, **kwargs
/usr/local/lib/python3.10/site-packages/allmydata/mutable/filenode.py:1006 in <lambda>
1005        d = defer.Deferred()
1006        self._serializer.addCallback(lambda ignore: cb(*args, **kwargs))
1007        # we need to put off d.callback until this Deferred is finished being
/usr/local/lib/python3.10/site-packages/allmydata/mutable/filenode.py:1061 in _update
1060        segment_size = self._version[3]
1061        num_old_segments = mathutil.div_ceil(old_size,
1062                                             segment_size)
/usr/local/lib/python3.10/site-packages/pyutil/mathutil.py:16 in div_ceil
15    """
16    return int((n//d) + (n%d != 0))
17
builtins.ZeroDivisionError: integer division or modulo by zero