Didn't fix the problem
after i deleted the minecraft/usercache.json this is the crash i got
https://pastebin.com/7xtY7SKx
Oh and btw i am on a MAC (OS X YOSMITE)
https://pastebin.com/3mjGGPxG
I Think its something to do with NullPointerException
I AM ON A MAC (OSX YOSMITE)
1 ERROR
29 WARNINGS
51 INFOS
2445 DEBUGS