Editor crashes after painting tile. Unable to load tile without crashing

I was painting a tiled landscape when the editor crashed. I’d been working on the tile for a few days, and added the foliage, meshes (only a few), material and painted landscape. Now, every time I load the landscape proxy, the editor crashes. I have sent the crash reports in, but don’t have debug symbols.

It’s important to note that I can load all 15 other tiles with no problem.