---- Minecraft Crash Report ----
// Shall we play a game?

Time: 1/3/18 3:22 PM
Description: Exception in server tick loop

java.lang.NullPointerException: Exception in server tick loop
	at hk.hashCode(SourceFile:121)
	at java.util.HashMap.hash(HashMap.java:338)
	at java.util.HashMap.remove(HashMap.java:798)
	at bjy.a(SourceFile:143)
	at rr.a(SourceFile:168)
	at rk.a(SourceFile:202)
	at net.minecraft.server.MinecraftServer.w(SourceFile:687)
	at qy.w(SourceFile:352)
	at net.minecraft.server.MinecraftServer.v(SourceFile:604)
	at net.minecraft.server.MinecraftServer.run(SourceFile:509)
	at java.lang.Thread.run(Thread.java:745)


A detailed walkthrough of the error, its code path and all known details is as follows:
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-- System Details --
Details:
	Minecraft Version: 18w01a
	Operating System: Linux (amd64) version 2.6.32-48-pve
	Java Version: 1.8.0_45-internal, Oracle Corporation
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 433525536 bytes (413 MB) / 1072889856 bytes (1023 MB) up to 4159438848 bytes (3966 MB)
	JVM Flags: 6 total; -Xms512M -Xmx4000M -XX:MaxPermSize=512M -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSIncrementalPacing
	IntCache: cache: 0, tcache: 0, allocated: 20, tallocated: 86
	Profiler Position: N/A (disabled)
	Player Count: 1 / 20; [rp['TextComponent{text='donk7413', siblings=[], style=Style{hasParent=false, color=null, bold=null, italic=null, underlined=null, obfuscated=null, clickEvent=null, hoverEvent=null, insertion=null}}'/749, l='world', x=149966.61, y=65.00, z=1887.62]]
	Data Packs: vanilla, file/datapack_admin.zip (incompatible)
	Is Modded: Unknown (can't tell)
	Type: Dedicated Server (map_server.txt)