const Login = ({
                 login,
                 dispatch,
                 loading,
                 form: {
                   validateFields,
                   getFieldDecorator,
                   setFieldsValue,
                   setFields
                 }
               }) => {
  console.log(loading)
  return (
    <div>login</div>
  );
};

Login.propTypes = {
  login: PropTypes.object,
  dispatch: PropTypes.func,
  loading: PropTypes.object
};
export default connect(({ login,loading }) => ({ login,loading }))(Form.create()(Login));

Why is the result printed out by writing loading like this: