1.1 --- a/generator.py	Sun Jun 27 22:12:23 2021 +0200
     1.2 +++ b/generator.py	Sun Jun 27 22:39:01 2021 +0200
     1.3 @@ -1206,7 +1206,7 @@
     1.4              print >>f_code, """\
     1.5  __attr %s(__attr __self, __attr number_or_string)
     1.6  {
     1.7 -    if (!__BOOL(__fn_native_int_is_int(__self, number_or_string)))
     1.8 +    if (!__BOOL(__fn_native_int_is_int(__NULL, number_or_string)))
     1.9          __raise_value_error(number_or_string);
    1.10  
    1.11      return number_or_string;