What is this? Revisited

So earlier this summer I found something growing in my garden that I didn't expect. It was some sort of vining thing that looked like it was from the pumpkin/squash family or perhaps, but less likely, cucumber. At the time I took the first picture, it was just a vine with leaves. I watched it grow, put out flowers, and finally something else. Honestly, I'm still not exactly sure what it was that was growing. It was definitely some sort of squash or gourd. It was green with some yellow and it was round. I'm not sure it had a long enough growing season to mature, not knowing when it was "planted" nor what it was supposed to look like when it was finished. I'm hoping to get some yard work done soon to get things cleaned up for the winter so the wayward vine will be making it's way to the compost bin soon.