Crash when breaking tall grass.

I was messing around in one of my worlds trying some things out like bunnies, killing sheep, I saw a broken block texture which was actually two seeds. I decided to break some tall grass to get seeds and then I crashed.

Description: Unexpected error

java.lang.IllegalArgumentException: Cannot get property azi{name=facing, clazz=class dw, values=[north, south, west, east]} as it does not exist!
	at ayx.b(SourceFile:120)
	at aqq.a(SourceFile:282)
	at bnw.c(SourceFile:154)
	at bnw.b(SourceFile:71)
	at bnw.a(SourceFile:48)