[MC-100925] ArrayIndexOutOfBoundsException as soon as world loads

So I was playing on my server earlier today on snapshot 16w15b. I logged out and everything was fine. But when I came back a few hours later and logged on, a few seconds later the game crashed with an ArrayIndexOutOfBoundsException. I've provided the crash report attached to this bug report.

Update:
The game does not crash in any other worlds, only my server world in single player and in multiplayer.

Update 2:
Only at my house in this world.

Description: Tesselating block model

java.lang.ArrayIndexOutOfBoundsException: 475
	at it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap.get(Long2ObjectOpenHashMap.java:374)
	at bkn.a(SourceFile:43)
	at bkn.c(SourceFile:56)
	at aht.a(SourceFile:299)
	at aht.f(SourceFile:295)
	at aht.b(SourceFile:178)
	at aic.b(SourceFile:158)
	at aii.a(SourceFile:36)
	at aii.b(SourceFile:51)
	at bcl$8.a(SourceFile:99)
	at bcl.a(SourceFile:181)
	at bob.a(SourceFile:144)
	at bob.b(SourceFile:76)
	at bob.a(SourceFile:48)
	at bob.a(SourceFile:41)