824     PyObject * const *fastargs;  in bytes_new()  local
831 …fastargs = _PyArg_UnpackKeywords(_PyTuple_CAST(args)->ob_item, nargs, kwargs, NULL, &_parser, 0, 3…  in bytes_new()
832     if (!fastargs) {  in bytes_new()
838     if (fastargs[0]) {  in bytes_new()
839         x = fastargs[0];  in bytes_new()
844     if (fastargs[1]) {  in bytes_new()
845         if (!PyUnicode_Check(fastargs[1])) {  in bytes_new()
846             _PyArg_BadArgument("bytes", "argument 'encoding'", "str", fastargs[1]);  in bytes_new()
850         encoding = PyUnicode_AsUTF8AndSize(fastargs[1], &encoding_length);  in bytes_new()
862     if (!PyUnicode_Check(fastargs[2])) {  in bytes_new()
863         _PyArg_BadArgument("bytes", "argument 'errors'", "str", fastargs[2]);  in bytes_new()
867     errors = PyUnicode_AsUTF8AndSize(fastargs[2], &errors_length);  in bytes_new()