UnboundLocalError: local variable 'name_tokens' referenced before assignment

[marmistrz]

$ cppclean .
Traceback (most recent call last):
  File "/usr/bin/cppclean", line 145, in <module>
    sys.exit(main())
  File "/usr/bin/cppclean", line 138, in main
    quiet=args.quiet):
  File "/usr/lib/python3.6/site-packages/cpp/find_warnings.py", line 597, in run
    hunter.find_warnings()
  File "/usr/lib/python3.6/site-packages/cpp/find_warnings.py", line 126, in find_warnings
    self._find_source_warnings()
  File "/usr/lib/python3.6/site-packages/cpp/find_warnings.py", line 542, in _find_source_warnings
    included_files, forward_declarations = self._read_and_parse_includes()
  File "/usr/lib/python3.6/site-packages/cpp/find_warnings.py", line 177, in _read_and_parse_includes
    module = self._get_module(node)
  File "/usr/lib/python3.6/site-packages/cpp/find_warnings.py", line 151, in _get_module
    ast_list = [_f for _f in builder.generate() if _f]
  File "/usr/lib/python3.6/site-packages/cpp/find_warnings.py", line 151, in <listcomp>
    ast_list = [_f for _f in builder.generate() if _f]
  File "/usr/lib/python3.6/site-packages/cpp/ast.py", line 651, in generate
    result = self._generate_one(token)
  File "/usr/lib/python3.6/site-packages/cpp/ast.py", line 675, in _generate_one
    return method()
  File "/usr/lib/python3.6/site-packages/cpp/ast.py", line 1180, in handle_struct
    return self._handle_class_and_struct(Struct)
  File "/usr/lib/python3.6/site-packages/cpp/ast.py", line 1174, in _handle_class_and_struct
    return self._get_class(class_type, None)
  File "/usr/lib/python3.6/site-packages/cpp/ast.py", line 1507, in _get_class
    name_tokens = [class_token] + name_tokens
UnboundLocalError: local variable 'name_tokens' referenced before assignment

Arch Linux, installed from pip

[myint]

@marmistrz What is contained in .?