Baking disappointment

I baked bread today with some yeast that has been in the cupboard for a while and if it had an expiration date on the package, the date probably would have passed already.
The yeast was sluggish to form bubbles in the liquid I started it in, but it didn't do too badly, so I figured I'd just need to give it some extra time with the risings. I gave it some extra time to rise and the bread rose nicely, so into the oven it went.

The disappointment: no oven spring. The bread had risen to the tops of the bread pans before I put it in the oven, and the bread was still only at the tops of the bread pans when it was done baking. It didn't rise another millimeter while it was baking. I think I'm going to be in for some pretty dense bread when it comes time to eat it for dinner. I fear the center may not be cooked all the way through.