Repitching onto trub

My dilemma is this:

I ordered supplies from online vendor, forgot to add the yeast ice package.

Yeast shows up and I make a starter.

Yeast is dead.

I have a batch of beer that used the same thread in my brew closet. It's in primary and is a pumpkin brew...with lots of pumpkin.

I know there's a fair amount of delicious yeast mixed in with that pumpkin.

Would swirling all the trub into a ~half full 3g carboy and putting it in the fridge help facilitate "washing?"

Also, would I be able to wash enough nastiness away that I could have viable yeast for a brewing tomorrow?

Thanks.

Yes, wash the yeast for sure. It will be plenty viable I am sure. Also, use this as your opportunity to really learn how to wash yeast. If you are already making starters, there is literally no reason to keep buying yeast. I keep at least 20 seperate yeast samples in my beer fridge, 7-8 different strains all of washed yeast.