The following use google translation
I try to use the clone in 14w31a and 14w32a
command block in -63,31,49
Then there's instruction
clone -43 54 39 -42 41 46 -505 54 39
This can operate normally
But when I use
clone -43 54 39 -42 41 46 -578 54 39
I do not know whether it was because too far
It said
Can not access blocks outside of the world
But I did not go beyond!