    def test_parse_header_cr_only(self):
        from waitress.parser import ParsingError

        data = b"GET /foobar HTTP/8.4\rfoo: bar"
        try:
            self.parser.parse_header(data)
        except ParsingError:
            pass
        else:  # pragma: nocover
            self.assertTrue(False)
The product acts as an intermediary HTTP agent
         (such as a proxy or firewall) in the data flow between two
         entities such as a client and server, but it does not
         interpret malformed HTTP requests or responses in ways that
         are consistent with how the messages will be processed by
         those entities that are at the ultimate destination.