The bug
If you push any block through the border, it will "glitch".
How to reproduce
Place a block just in front of the world border (it depends on the side of the world border)
Put a piston facing to the world border before the block
Activate the piston
Related issues
Attachments
Comments


Please someone?

Cannot confirm, but can confirm MC-74702
Better steps to reproduce required.

Please force a crash by pressing F3 + C for 10 seconds while in-game and attach the crash report ([minecraft/crash-reports/crash-<DATE>-client.txt|http://hopper.minecraft.net/help/finding-minecraft-data-folder]
) here.

confirmed for 15w46a