Open to LAN "Internal Exception: java.lang.NullPointerException"

When i open a world to LAN, the other user is unable to join my world in the version from 14w25a - 1.8prerelease-3. The ip and port and everything else should be right, it even shows up as an option in the multiplayer. Open to LAN works in versions before 14w25a, so i am assuming that this is a bug, and not just me.

P.S if it's just me, tell me a way so that it will work, PLS.

I expected the LAN world to start up without a problem.

What happened was: "Internal Exception: java.lang.NullPointerException"

Steps to Reproduce:
1. Open a world to LAN
2. Use another computer or open another mc launcher and join the LAN server