Сообщение future_check_features(PyFutureFeatures *ff, stmt_ty s, const char *filename)

future_check_features(PyFutureFeatures *ff, stmt_ty s, const char *filename) ... else if (strcmp(feature, "braces") == 0) { PyErr_SetString(PyExc_SyntaxError, "not a chance"); PyErr_SyntaxLocation(filename, s->lineno); return 0; }