In a creative world I am trying to see the layout of all the flowers in a flower forest, so I created a large grass platform in the sky. I have some command blocks, set on always active and repeat, set up to remove any tall grass in the area above the grass platform. Since the platform is so big, I decided to use a flying machine underneath the platform with a dispenser and bone meal to try to automate the process. 

When the flying machine dispenser bone meals the grass from underneath the grass blocks, the game crashes.  
 
Here are some images of the flying machine setup:
 
 

 
I have also attached a video of the game crashing