[MC-140235] Generating chunks and using /locate causes a datafixer crash

18w48a: crash-2018-11-29_14.53.32-server.txt

java.lang.AbstractMethodError: bxx$$Lambda$1097/621257072.a(Lcom/mojang/datafixers/Dynamic;)Ljava/lang/Object;
	at yg.a(SourceFile:18)
	at cat.<init>(SourceFile:44)
	at bvl$a.<init>(SourceFile:29)
	at bxc$$Lambda$1035/262217690.load(Unknown Source)
	at cax.a(SourceFile:86)
	at bqu.a(SourceFile:614)
	at bqu.a(SourceFile:229)
	at ui.d(SourceFile:439)
	at ui$$Lambda$2066/1657672914.get(Unknown Source)
	at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1582)
	at ui$$Lambda$2077/102419981.accept(Unknown Source)
	at java.util.ArrayList.forEach(ArrayList.java:1249)
	at ui.e(SourceFile:369)
	at ui.a(SourceFile:272)
	at baq.a(SourceFile:261)
	at baq.d(SourceFile:256)
	at baq.b(SourceFile:497)
	at baq.a(SourceFile:1322)
	at agi.az(SourceFile:1134)
	at agi.Y(SourceFile:457)
	at agr.Y(SourceFile:259)
	at agi.U_(SourceFile:376)
	at agr.U_(SourceFile:1821)
	at aqj.U_(SourceFile:283)
	at ul.i(SourceFile:377)
	at uz.ab_(SourceFile:198)
	at io.a(SourceFile:238)
	at uy.c(SourceFile:171)
	at net.minecraft.server.MinecraftServer.b(SourceFile:805)
	at net.minecraft.server.MinecraftServer.a(SourceFile:716)
	at dog.a(SourceFile:128)
	at net.minecraft.server.MinecraftServer.run(SourceFile:582)
	at java.lang.Thread.run(Thread.java:745)

How to Reproduce:

Create a new world (creative with seed 18w48a, any seed will work)
Join the world and execute
```
/locate New_Village
```
This will yield a village of the new type somewhere around x700, z-1470. Teleport to this village using the provided command.
And the game will crash.

Edit:

It appears to just exploring the world a bit too fast also causes the crash to happen. Did happen as often as using the command. Upon reopening the world the game will crash with a tick loop.