Using a piston to push an open barrel will cause the barrel to fail to close, and will cause the game to crash when trying to break the barrel.

Steps to reproduce (using the world in the attachment):

1. Place the barrel on the hopper
2. Open the barrel and put in some items (don't close the barrel interface)
3. After the barrel is pushed, the interface will close, at which point an attempt will be made to break the barrel
4. The game will crash