I was playing on a custom superflat, and was building a minecart track from my base to a village I had visited before. The issue began when I was playing offline, but persisted as I got back online. I can occasionally see one of the village buildings when I try to load the world, but as I had saved right next to the village, I'm afraid I may have destroyed my save. The crash message I get is as follows:
The game crashed whilst ticking entity
Error: java.lang.IndexOutOfBoundsException: Index: 1, Size: 1
I'm uploading the entire world save, if it works.