Put the summary of the bug you're having here
What I expected to happen was...:
I expected to play the world regularly
What actually happened was...:
The world had succsesfully loaded for 10-20 seconds and it suddenly crashes
Steps to Reproduce:
1. Click "Play" on minecraft launcher
2. Click Play World on that particular world.
3. After 10 secondsof fully loading the world, It crashes !!
Environment
Windows 8 64-bit Operating System, x64-based processor
Intel(R) Core(TM) i5-3317U @ 1.70GHz 1.70GHz
It happens to me too. Crash report says: "n" must be positive. What the hell is "n" variable and why it makes the game crash after some seconds, but not instantly? Nobody knows...