Products added to cart, even if required attribute is not selected...

For example, when selling a t-shirt, a customer can add the t-shirt to the cart with no size.

I understand that you have abandoned the 5.x version, which is a shame when such an important feature of Ubercart has been removed. Can you point me in the right direction as far as what the additional code required would look like? I found an issue where you quickly added this functionality to the 6.x branch...