Accepted but might fail class before graduation

[throwaway1213]

Any advice would be appreciated on this as I'm in panic mode right now. 

I was accepted to a grad program (signed contract and everything ready to go for Fall 2016) but might have failed a class I need for graduation. What are my options? 

Would my grad offer be rescinded? 

Would it not matter as long as I have a transcript saying I graduated before the start of my grad program? This would mean I would need to retake the class this summer.

I am grateful for any help.

[MathCat]

You have to ask the department you were admitted to. 

[fuzzylogician]

16 minutes ago, MathCat said:

You have to ask the department you were admitted to. 

This. There is a good chance that as long as you can officially graduate before your program begins, you will be alright. But none of us can promise you that; you need to talk with your department and clarify matters right away (or: as soon as you actually know you've failed).