sca2d Getriebe error

* generating "/home/owner/git/gearlib/Getriebe.tree.txt"
parsing /home/owner/git/gearlib/Getriebe.scad
Traceback (most recent call last):
  File "/home/owner/git/gearlib/langdump.py", line 178, in <module>
    sys.exit(main())
  File "/home/owner/git/gearlib/langdump.py", line 174, in main
    return generate_meta(in_path=in_path)
  File "/home/owner/git/gearlib/langdump.py", line 138, in generate_meta
    _generate_meta(
  File "/home/owner/git/gearlib/langdump.py", line 102, in _generate_meta
    [parsed, all_messages] = analyser.analyse_file(
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/sca2d.py", line 85, in analyse_file
    scope = self.get_scope_from_file(filename)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/sca2d.py", line 156, in get_scope_from_file
    return self._parse_file(filename)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/sca2d.py", line 63, in _parse_file
    self._parsed_files[filename] = OuterScope(tree, scad_code, filename)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/outerscope.py", line 43, in __init__
    super().__init__(tree, None, top_level=True)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 40, in __init__
    self._parse_scope()
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 155, in _parse_scope
    self._parse_module_definition(child)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 254, in _parse_module_definition
    scope = ModuleDefScope(module_scope,
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 555, in __init__
    super().__init__(tree, parent, top_level=False, preassigned_vars=preassigned_vars)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 40, in __init__
    self._parse_scope()
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 171, in _parse_scope
    self._parse_if(child)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 316, in _parse_if
    self._add_control_scope(control_scope)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 329, in _add_control_scope
    scope = ControlScope(control_scope,
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 604, in __init__
    super().__init__(tree, parent, top_level=False, preassigned_vars=preassigned_vars)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 40, in __init__
    self._parse_scope()
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 171, in _parse_scope
    self._parse_if(child)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 316, in _parse_if
    self._add_control_scope(control_scope)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 329, in _add_control_scope
    scope = ControlScope(control_scope,
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 604, in __init__
    super().__init__(tree, parent, top_level=False, preassigned_vars=preassigned_vars)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 40, in __init__
    self._parse_scope()
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 153, in _parse_scope
    self._parse_assignment(child)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 188, in _parse_assignment
    self._parse_complex_exprs(complex_expressions)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 215, in _parse_complex_exprs
    self._parse_list_comps(list_comps)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 226, in _parse_list_comps
    scope = ListCompScope(list_comp, self)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 778, in __init__
    super().__init__(tree, parent, top_level=False, preassigned_vars=None)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 40, in __init__
    self._parse_scope()
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 786, in _parse_scope
    scope = ForExprScope(list_comp_tree, self)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 638, in __init__
    super().__init__(tree, parent, top_level=False, preassigned_vars=None)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 40, in __init__
    self._parse_scope()
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 687, in _parse_scope
    self._parse_expression(final_expr)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 653, in _parse_expression
    self._parse_complex_exprs(complex_expressions)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 215, in _parse_complex_exprs
    self._parse_list_comps(list_comps)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 226, in _parse_list_comps
    scope = ListCompScope(list_comp, self)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 778, in __init__
    super().__init__(tree, parent, top_level=False, preassigned_vars=None)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 40, in __init__
    self._parse_scope()
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 792, in _parse_scope
    scope = IfExprScope(list_comp_tree, self)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 638, in __init__
    super().__init__(tree, parent, top_level=False, preassigned_vars=None)
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 40, in __init__
    self._parse_scope()
  File "/home/owner/.local/lib/python3.9/site-packages/sca2d/scope.py", line 754, in _parse_scope
    scope = ElseExprScope(self._tree.children[3], self)
IndexError: list index out of range