The guy saying item that has "0" I actually tried it on 1.8.9 singleplayer but not on 1.9.
This duplication glitch has been patched since the latest push of 1.7 -> 1.9 from PaperSpigot, according to their ****** atleast.
The guy saying item that has "0" I actually tried it on 1.8.9 singleplayer but not on 1.9.