World won't load

I picked up this version about a month ago and I've been playing it frequently, but today the game suddenly crashed while I was playing and kicked me out to the Switch home screen. The game loads just fine on re-opening it, but the world specifically I was playing now crashes the entire game the second I try to open it. I don't even get a loading screen - it just crashes.

Before this happened I'd been rearranging items in chests, but the crash happened immediately after crafting two anvils. They no sooner hit my inventory that the game claimed there was an error and closed. I've had frequent crashes after severe lag (always in a single player world), but this is the first time it's cut me off from my world on top of it.

I started playing right before the latest update, so the world's only about a month old, but I'd seriously hate to lose everything I've built up in there.

EDIT: The world can be copied, but crashes the game the exact same way when attempting to load it. I found a previous copy from a few days before the crash that works fine, and no other world is affected.