user.module always

When you try to change a user’s account and the access rights are set not to allow changing the user name, you get this error

“You are not allowed to change this username.”

The problems seems to be this condition at line 1210

  elseif ($edit['name'] != $user->name) {
    form_set_error('name', t('You are not allowed to change this username.'));
  }

$edit['name'] is always null