I have a survival world which I play on frequently and I have just experienced a crash on it. I was sleeping when it did crash and I cannot sleep in it, since it says that it is occupied. This even happens in the daytime, when I should see the classic "You can only sleep at night," message.
It is hard to recreate this since crashes are so unexpected and unusual.
If anyone is experiencing this in their own world, you can break the bed and it will turn to normal