Minor In any example where coordinates would be rendered as part of [TAB] completion, 0 is inputted instead. This includes examples where 1.9 would auto-fill ~ ~ ~ for coordinates (as in the case where no block is within target view).
For those who use tab completion regularly, this is a game-breaking bug.
In my personal example:
Case Example 1
/fill [x1] [y1] [z1] [x2] [y2] [z2] (etc)
Tab complete makes:
Case Example 1
/fill 0 0 0 0 0 0 (etc)
Another example:
Case Example 1
/summon sheep 0 0 0
