I was playing lan with my friend and i had to jump off a cliff, i jumped, hit the ground and died. He then got disconnected, and my screen went to a blank dirt screen, his to 'server closed'. Soon after my screen displayed an error report. I closed minecraft, reopened it and tried to open the world, when i try it gives my the same error, at the top of the report on-screen it says, 'unexpected error'. I will attach the grnerated txt.