When I go into a singleplayer world or a multiplayer server, either on version 1.7.10, the game crashes when I go onto said world or said server.

Put the summary of the bug you're having here

What I expected to happen was...:
to go onto a server or world on release 1.7.10

What actually happened was...:
when i went onto a server or world, minecraft would crash

Steps to Reproduce:
1. pull up release 1.7.10 in the launcher and open
2. go onto a single player world without any blocks from 1.8 or 1.9, or, a 1.7.10 compatible server
3.load the world or join the server, and my game will crash