Minecraft crashes due to 'Entity to track' error caused by squid

Put the summary of the bug you're having here

What I expected to happen was...:
Minecraft would work properly.

What actually happened was...:
Minecraft lags and crashes spontaneously while I am building with redstone near the top of the world, often in creative mode, after I had started a server using the Open LAN feature.

Steps to Reproduce:
Haven't been able to reproduce in other worlds.