Crash: Ticking memory connection - java.lang.ArrayIndexOutOfBoundsException: -1

---- Minecraft Crash Report ----
// Hey, that tickles! Hehehe!

Time: 10/24/18 9:53 AM
Description: Ticking memory connection

java.lang.ArrayIndexOutOfBoundsException: -1
	at bzo.a(SourceFile:106)
	at bzo.a(SourceFile:148)
	at bzo.a(SourceFile:117)
	at tq.b(SourceFile:72)
	at tu.a(SourceFile:117)
	at tu.a(SourceFile:145)
	at ty.a(SourceFile:758)
	at ty.a(SourceFile:742)
	at wc.a(SourceFile:272)
	at wc.c(SourceFile:339)
	at wc.a(SourceFile:165)
	at ur.b(SourceFile:113)
	at ur.Z_(SourceFile:65)
	at ik.a(SourceFile:238)
	at uo.c(SourceFile:171)
	at net.minecraft.server.MinecraftServer.b(SourceFile:750)
	at net.minecraft.server.MinecraftServer.a(SourceFile:661)
	at djr.a(SourceFile:125)
	at net.minecraft.server.MinecraftServer.run(SourceFile:564)
	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 bzo.a(SourceFile:106)
	at bzo.a(SourceFile:148)
	at bzo.a(SourceFile:117)
	at tq.b(SourceFile:72)
	at tu.a(SourceFile:117)
	at tu.a(SourceFile:145)
	at ty.a(SourceFile:758)
	at ty.a(SourceFile:742)
	at wc.a(SourceFile:272)
	at wc.c(SourceFile:339)
	at wc.a(SourceFile:165)
	at ur.b(SourceFile:113)
	at ur.Z_(SourceFile:65)
	at ik.a(SourceFile:238)

-- Ticking connection --
Details:
	Connection: ik@3b96b8e0
Stacktrace:
	at uo.c(SourceFile:171)
	at net.minecraft.server.MinecraftServer.b(SourceFile:750)
	at net.minecraft.server.MinecraftServer.a(SourceFile:661)
	at djr.a(SourceFile:125)
	at net.minecraft.server.MinecraftServer.run(SourceFile:564)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 18w43a
	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: 476109584 bytes (454 MB) / 1442840576 bytes (1376 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
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [ub['The_Dale_Gribble'/225, l='14snap', x=-7.50, y=64.00, z=-131.50]]
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.