class FileSystemEncodingChanged(RuntimeError):
    def __init__(self):
        msg = (
            "Access was attempted on a file that contains unicode "
            "characters in its path, but somehow the current locale "
            "does not support utf-8. You may need to set 'LC_ALL' "
            "to a correct value, eg: 'en_US.UTF-8'."
        )
        RuntimeError.__init__(self, msg)
