(EDIT: I was just mining iron and the same thing happened I did nothing I was just playing the game)

I went to bed to skip the night and when I woke up my game crashed and deleted my achivements after booting the game back up

What I expected to happen was...:
To wake up and do whatever I was doing

What actually happened was...:
My game crashed after waking up

Steps to Reproduce:
I literaly just woke up and maybe alt tabed at the same time but I'm not sure 

If it helps you in any way that was on a hardcore singlplayer world and I got a crash cod "-2"
I have no idea what that mean but I hope it helps