Anyone know about personal bankruptcy and real estate?

A friend brought me this question. I didn’t have an answer for him.

He divorced a couple of years ago. He and his ex still jointly own a house. It has negative equity. He has been trying to sell it, and will negotiate with the bank to get out from under the loan.

He’s just learned that his ex is filing for bankruptcy. How is that likely to affect things?

He is seeing an attorney on Monday. And that will be expert opinion of course. He would just like to go in with some general sense of things so he can figure out if the attorney is way off base. ‘Cause you know… attorneys…