Game Constantly Crashing Due to Null String for Iron Golem Particles

Minecraft has been crashing non-stop since I managed to spawn an Iron Golem in my village. Whenever the Golem begins walking the game crashes, regardless of the type of block it is walking on. An empty string is being passed in by the Iron Golem to generate some sort of particle, and a number parse is attempted on the null string causing the crashes. After reloading the file, the game can be expected to crash again within 10 seconds, coinciding with the Golem walking.