using default and placeholder

Hi there,

I wanted to use default on a field to get user name and email when they are logged in, BUT use the placeholder when user is not logged in.

BUT when I add both, the validation fails on the mail tab.

What am I doing wrong.

e.g.

[text* your-name placeholder "Your Name (Required)" default:user_display_name]

[email* your-email placeholder "Your Email (Required)" default:user_email]