---- Minecraft Crash Report ----
// You're mean.

Time: 15/06/18 23:00
Description: Ticking memory connection

java.lang.NullPointerException: Ticking memory connection
	at brk.a(SourceFile:200)
	at sp.a(SourceFile:189)
	at sp.<init>(SourceFile:164)
	at uz.g(SourceFile:443)
	at to.b(SourceFile:118)
	at to.Z_(SourceFile:65)
	at hv.a(SourceFile:221)
	at tl.c(SourceFile:175)
	at net.minecraft.server.MinecraftServer.w(SourceFile:719)
	at net.minecraft.server.MinecraftServer.v(SourceFile:626)
	at dir.v(SourceFile:156)
	at net.minecraft.server.MinecraftServer.run(SourceFile:531)
	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 brk.a(SourceFile:200)
	at sp.a(SourceFile:189)
	at sp.<init>(SourceFile:164)
	at uz.g(SourceFile:443)
	at to.b(SourceFile:118)
	at to.Z_(SourceFile:65)
	at hv.a(SourceFile:221)

-- Ticking connection --
Details:
	Connection: hv@d606b7d
Stacktrace:
	at tl.c(SourceFile:175)
	at net.minecraft.server.MinecraftServer.w(SourceFile:719)
	at net.minecraft.server.MinecraftServer.v(SourceFile:626)
	at dir.v(SourceFile:156)
	at net.minecraft.server.MinecraftServer.run(SourceFile:531)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 1.13-pre2
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 702302760 bytes (669 MB) / 1060372480 bytes (1011 MB) up to 4281597952 bytes (4083 MB)
	JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx4G -Xms1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
	Profiler Position: N/A (disabled)
	Player Count: 0 / 8; []
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.