---- Minecraft Crash Report ----
// I feel sad now

Time: 4/20/17 5:35 PM
Description: Exception in server tick loop

java.lang.ArrayIndexOutOfBoundsException: -1
at java.util.Arrays$ArrayList.get(Arrays.java:3841)
at eq.get(SourceFile:40)
at add.a(SourceFile:567)
at add.a(SourceFile:368)
at afi.b(SourceFile:111)
at ade.U(SourceFile:1275)
at als.e(SourceFile:978)
at on.e(SourceFile:353)
at oc.a(SourceFile:748)
at gd.l(SourceFile:381)
at ob.c(SourceFile:215)
at net.minecraft.server.MinecraftServer.D(SourceFile:652)
at nb.D(SourceFile:335)
at net.minecraft.server.MinecraftServer.C(SourceFile:562)
at net.minecraft.server.MinecraftServer.run(SourceFile:466)
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: 17w16a
Operating System: Linux (amd64) version 4.1.4-gentoo
Java Version: 1.8.0_111, Oracle Corporation
Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 383483008 bytes (365 MB) / 1065877504 bytes (1016 MB) up to 1065877504 bytes (1016 MB)
JVM Flags: 2 total; -Xms1G -Xmx1G
IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
Profiler Position: N/A (disabled)
Player Count: 1 / 20; [ns['theosib'/162337, l='world', x=175.20, y=66.00, z=158.99]]
Is Modded: Unknown (can't tell)
Type: Dedicated Server (map_server.txt)