I used tnt to make an anvil fly and when it came back down it landed on a redstone repeater, which made my Minecraft instantly crash.

What I expected to happen was...:
I thought it would break the repeater or maybe the fallingg anvil.

What actually happened was...:
I used a anvil launcher system by using tnt and redstone delays to make an anvil fly very high up into the sky. As it landed it hit on of the repeaters used in the redstone circuit and it crashed my game instantly.

Steps to Reproduce:
1. Make the anvil fall from a bit of height.
2. Make it land on a repeater.
3. Have a nice crash!

I've also included the crash report I got, which the crash screen said that I should send in. I hope it helps.
(I don't know if this bug works in other versions of minecraft)