13w05a Crash

When I broke a jukebox playing "wait" powering a vertical piston with a comparator, it crashed.

*What I expected to happen was the jukebox would stop and the piston would turn off.

*What actually happened was my game crashed because of a "ticking memory connection".

Steps to Reproduce:
1. Put down a jukebox.
2. place a comparator in front of it.
3. place redstone in front of the comparator.
4. place a vertical piston facing up in front of the redstone
5. put wait into the jukebox
6. break the jukebox
7.???
8.profit