my game crashed and i dont know why

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here
i tried to install a resource pack and put it in my game and i knew my game had been acting weird and not opening my worlds for no reason
What actually happened was...:
Describe what happened here
after i hooked up the resource pack my game just totally crashed and i dont know why

Steps to Reproduce:
1. download PureBDcraft resource pack
2. put it in your resource pack folder for minecraft
3. try to put the resource pack in your game (ine the selected resource pack column)
4. have your game crash