[css-regions] Floats and auto-sized regions

Hello everybody,
I'd like to know your position on the following scenario: suppose we have some content that gets flowed in an auto-sized region, and said content also has a floated box in it, that's taller than the non-float content. Should the size of the region be the size of the non-float *and* float content (taller) or just the size of the non-float content (shorter)?

A corollary to this scenario is what should the size for an auto-size region when the only thing flowed in it would be a float?

My personal take is that the float itself should not contribute to the sizing of the regions other than through the eventual shortening of line boxes of the surrounding contents and/or clearing. (The answer to the corollary being that the region should have 0 height).

Either way, I think there should be some explicit wording in the spec.

Thoughts?
Mihai