crash report

---- Minecraft Crash Report -------- Minecraft Crash Report ----// Uh... Did I do that?
Time: 11/29/18 7:12 PMDescription: Exception ticking world
java.lang.AbstractMethodError: bxx$$Lambda$1087/251788397.a(Lcom/mojang/datafixers/Dynamic;)Ljava/lang/Object; at yg.a(SourceFile:18) at cat.<init>(SourceFile:44) at bvl$a.<init>(SourceFile:29) at bxc$$Lambda$1025/725727419.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$$Lambda$2085/2146263534.get(Unknown Source) at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1582) at ui$$Lambda$2096/1060699122.accept(Unknown Source) at java.util.ArrayList.forEach(ArrayList.java:1249) at ui.e(SourceFile:369) at net.minecraft.server.MinecraftServer.q(SourceFile:641) at net.minecraft.server.MinecraftServer.p(SourceFile:625) at net.minecraft.server.MinecraftServer.run(SourceFile:584) 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 threadStacktrace: at yg.a(SourceFile:18) at cat.<init>(SourceFile:44) at bvl$a.<init>(SourceFile:29) at bxc$$Lambda$1025/725727419.load(Unknown Source) at cax.a(SourceFile:86) at bqu.a(SourceFile:614) at bqu.a(SourceFile:229) at ui.d(SourceFile:439) at ui$$Lambda$2085/2146263534.get(Unknown Source) at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1582) at ui$$Lambda$2096/1060699122.accept(Unknown Source) at java.util.ArrayList.forEach(ArrayList.java:1249)
– Affected level --Details: Level name: New World All players: 1 total; [ul['ronnie1001'/383, l='New World', x=-620.43, y=105.01, z=-674.69]] Chunk stats: ServerChunkCache: 3881 Level seed: -4401839904302526581 Level generator: ID 00 - default, ver 1. Features enabled: true Level generator options: {} Level spawn location: World: (-112,67,-176), Chunk: (at 0,4,0 in -7,-11; contains blocks -112,0,-176 to -97,255,-161), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1) Level time: 2061 game time, 2061 day time Level dimension: 0 Level storage version: 0x04ABD - Anvil Level weather: Rain time: 101753 (now: false), thunder time: 98570 (now: false) Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: trueStacktrace: at net.minecraft.server.MinecraftServer.b(SourceFile:782) 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: 530093624 bytes (505 MB) / 1409286144 bytes (1344 MB) up to 2147483648 bytes (2048 MB) JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M Player Count: 1 / 8; [ul['ronnie1001'/383, l='New World', x=-620.43, y=105.01, z=-674.69]] Data Packs: vanilla Type: Integrated Server (map_client.txt) Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.