---- Minecraft Crash Report ----
// But it works on my machine.

Time: 29/11/18 14:53
Description: Ticking player

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)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Server thread
Stacktrace:
	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)

-- Player being ticked --
Details:
	Entity Type: minecraft:player (ul)
	Entity ID: 326
	Entity Name: tomudding
	Entity's Exact location: 704.50, 79.00, -1471.50
	Entity's Block location: World: (704,78,-1472), Chunk: (at 0,4,0 in 44,-92; contains blocks 704,0,-1472 to 719,255,-1457), Region: (1,-3; contains chunks 32,-96 to 63,-65, blocks 512,0,-1536 to 1023,255,-1025)
	Entity's Momentum: 0.00, 0.00, 0.00
	Entity's Passengers: []
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at ul.i(SourceFile:377)
	at uz.ab_(SourceFile:198)
	at io.a(SourceFile:238)

-- Ticking connection --
Details:
	Connection: io@132bac97
Stacktrace:
	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)

-- System Details --
Details:
	Minecraft Version: 18w48a
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_51, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 263390240 bytes (251 MB) / 822083584 bytes (784 MB) up to 6442450944 bytes (6144 MB)
	JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx6G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M
	Player Count: 1 / 8; [ul['tomudding'/326, l='18w48a', x=704.50, y=79.00, z=-1471.50]]
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.