Uncaught iterator error in Fill

[MicahGale]

Describe the bug

A clear and concise description of what the bug is.

To Reproduce

A short code snippet of what you have ran. Please change or remove any specific values or anything that can't be public. For example:

problem = montepy.read_input("foo.imcnp")

Error Message (if any)

If an error message was printed please include the entire stacktrace. If it includes any specific values please change or remove them. For example:

../../mambaforge/lib/python3.12/site-packages/montepy/input_parser/input_reader.py:31: in read_input
    problem.parse_input(replace=replace)
../../mambaforge/lib/python3.12/site-packages/montepy/mcnp_problem.py:367: in parse_input
    obj = obj_parser(input)
../../mambaforge/lib/python3.12/site-packages/montepy/mcnp_object.py:45: in wrapped
    add_line_number_to_exception(e, self)
../../mambaforge/lib/python3.12/site-packages/montepy/errors.py:232: in add_line_number_to_exception
    raise error
../../mambaforge/lib/python3.12/site-packages/montepy/mcnp_object.py:41: in wrapped
    return func(*args, **kwargs)
../../mambaforge/lib/python3.12/site-packages/montepy/cell.py:95: in __init__
    self._parse_keyword_modifiers()
../../mambaforge/lib/python3.12/site-packages/montepy/mcnp_object.py:45: in wrapped
    add_line_number_to_exception(e, self)
../../mambaforge/lib/python3.12/site-packages/montepy/errors.py:232: in add_line_number_to_exception
    raise error
../../mambaforge/lib/python3.12/site-packages/montepy/mcnp_object.py:41: in wrapped
    return func(*args, **kwargs)
../../mambaforge/lib/python3.12/site-packages/montepy/cell.py:119: in _parse_keyword_modifiers
    input = input_class(in_cell_block=True, key=key, value=value)
../../mambaforge/lib/python3.12/site-packages/montepy/mcnp_object.py:45: in wrapped
    add_line_number_to_exception(e, self)
../../mambaforge/lib/python3.12/site-packages/montepy/errors.py:232: in add_line_number_to_exception
    raise error
../../mambaforge/lib/python3.12/site-packages/montepy/mcnp_object.py:41: in wrapped
    return func(*args, **kwargs)
../../mambaforge/lib/python3.12/site-packages/montepy/data_inputs/fill.py:46: in __init__
    self._parse_cell_input(key, value)
../../mambaforge/lib/python3.12/site-packages/montepy/mcnp_object.py:45: in wrapped
    add_line_number_to_exception(e, self)
../../mambaforge/lib/python3.12/site-packages/montepy/errors.py:232: in add_line_number_to_exception
    raise error
../../mambaforge/lib/python3.12/site-packages/montepy/mcnp_object.py:41: in wrapped
    return func(*args, **kwargs)
../../mambaforge/lib/python3.12/site-packages/montepy/data_inputs/fill.py:144: in _parse_cell_input
    get_universe(value)
../../mambaforge/lib/python3.12/site-packages/montepy/data_inputs/fill.py:92: in get_universe
    self._parse_matrix(value)
../../mambaforge/lib/python3.12/site-packages/montepy/mcnp_object.py:45: in wrapped
    add_line_number_to_exception(e, self)
../../mambaforge/lib/python3.12/site-packages/montepy/errors.py:256: in add_line_number_to_exception
    raise error.with_traceback(trace)
../../mambaforge/lib/python3.12/site-packages/montepy/mcnp_object.py:41: in wrapped
    return func(*args, **kwargs)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = Fill: set_in_cell: True, in_cell: True old_number: None, old_transform: None old_numbers: [[[23 23 23 ... 23 23 23]
  ...e: None, universes: None, transform: None Multi_universe: True hidden_transform: None Min/Max: [-14 -14 -14] [14 14 14]
value = (Node: fill: {'classifier': (Classifier: mod: None, prefix: (Value, fill, padding: None), number: None, particles: Non..., padding: (Padding, [' '])), (Value, 23.0, padding: (Padding, [' '])), (Value, 23.0, padding: (Padding, [' ']))]))])})

    def _parse_matrix(self, value):
        """
        Parses a matrix fill of universes.

        :param value: the value in the cell
        :type value: str
        """
        self._multi_universe = True
        words = value["data"]
        self._min_index = np.zeros((3,), dtype=np.dtype(int))
        self._max_index = np.zeros((3,), dtype=np.dtype(int))
        limits_iter = (
            it.islice(words, 0, None, 3),
            it.islice(words, 1, None, 3),
            it.islice(words, 2, None, 3),
        )
        for axis, min_val, seperator, max_val in zip(
            Fill.DIMENSIONS.values(), *limits_iter
        ):
            for val, limit_holder in zip(
                (min_val, max_val), (self._min_index, self._max_index)
            ):
                try:
                    val._convert_to_int()
                    limit_holder[axis] = val.value
                except ValueError as e:
                    raise ValueError(
                        f"The lattice limits must be an integer. {val.value} was given"
                    )
        for min_val, max_val in zip(self.min_index, self.max_index):
            if min_val > max_val:
                raise ValueError(
                    "The minimum value must be smaller than the max value."
                    f"Min: {min_val}, Max: {max_val}, Input: {value.format()}"
                )
        self._old_numbers = np.zeros(self._sizes, dtype=np.dtype(int))
        words = iter(words[9:])
        for i in self._axis_range(0):
            for j in self._axis_range(1):
                for k in self._axis_range(2):
>                   val = next(words)
E                   StopIteration:
E
E                   Error came from Fill: Universe: None, transform: None from an unknown file.

MCNP input file snippet

MWE in progress

Version

• Version 1.0.0a1dev306

Additional context

Add any other context about the problem here.