Dear Mojang:
When I ran the game with the version of 0.14.x, this world worked very well. But when I updated my game to 0.15.1, I found that this world can open correctly, but once I tried to walk, the game will crash. So what happens? Is it a bug? I uploaded a copy of the world
Finally,sorry about my bad English.

_Edit by rplatham: World opens as expected. Using max render distance, when I rotate the player's view to the right, MCPE crashes at the screenshot1. When I rotate the player's view to the left, MCPE crashes at screenshot2. I suspect there's something in the chunks between those two screenshots that cause problems, possibly in chunks that are loading when the player's view changes. I can move around in the world and it does not crash so long as I avoid that area. If I set the render distance to the lowest setting, I can get closer to that area. I suspect that the world has been corrupted. Do you have a backup that works on 0.14.x?