RuntimeError: generator raised StopIteration for a very simple code

[romintomasetti]

I came across a code for which cppclean stops prematurely with

Traceback (most recent call last):
  File "/home/romin/.local/lib/python3.8/site-packages/cpp/ast.py", line 887, in _get_matching_char
    token = get_next_token()
  File "/home/romin/.local/lib/python3.8/site-packages/cpp/ast.py", line 904, in _get_next_token
    return next(self.tokens)
StopIteration

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/romin/.local/bin/cppclean", line 166, in <module>
    sys.exit(main())
  File "/home/romin/.local/bin/cppclean", line 139, in main
    entire_ast = list([_f for _f in builder.generate() if _f])
  File "/home/romin/.local/bin/cppclean", line 139, in <listcomp>
    entire_ast = list([_f for _f in builder.generate() if _f])
  File "/home/romin/.local/lib/python3.8/site-packages/cpp/ast.py", line 675, in generate
    result = self._generate_one(token)
  File "/home/romin/.local/lib/python3.8/site-packages/cpp/ast.py", line 702, in _generate_one
    return method()
  File "/home/romin/.local/lib/python3.8/site-packages/cpp/ast.py", line 1246, in handle_class
    return self._handle_class_and_struct(Class)
  File "/home/romin/.local/lib/python3.8/site-packages/cpp/ast.py", line 1243, in _handle_class_and_struct
    return self._get_class(class_type, None)
  File "/home/romin/.local/lib/python3.8/site-packages/cpp/ast.py", line 1601, in _get_class
    return self._get_method(name_tokens, 0, None, False)
  File "/home/romin/.local/lib/python3.8/site-packages/cpp/ast.py", line 1009, in _get_method
    parameters = list(self._get_parameters())
RuntimeError: generator raised StopIteration

A MWE might be

#ifdef MYDEFINE
class Any
#else
class Any final
#endif
{
    public:
        Any(){};
};

int main()
{
    Any a;
    return 0;
} 

The problem is clearly caused by the #ifdef ... #endif statement surrounding the class.