18w30a server crashes with "Stack Overflow" message. Crash log indicates an "out of bounds exception" while ticking world entities. This is just by wandering around in my base.
(18w30a) [^crash-2018-07-25_12.23.44-server.txt]
Description: Exception ticking world entities
java.lang.ArrayIndexOutOfBoundsException: -1
at it.unimi.dsi.fastutil.objects.ObjectLinkedOpenHashSet.fixPointers(ObjectLinkedOpenHashSet.java:851)
at it.unimi.dsi.fastutil.objects.ObjectLinkedOpenHashSet.shiftKeys(ObjectLinkedOpenHashSet.java:479)
at it.unimi.dsi.fastutil.objects.ObjectLinkedOpenHashSet.removeEntry(ObjectLinkedOpenHashSet.java:486)
at it.unimi.dsi.fastutil.objects.ObjectLinkedOpenHashSet.rem(ObjectLinkedOpenHashSet.java:514)
at it.unimi.dsi.fastutil.objects.AbstractObjectCollection.remove(AbstractObjectCollection.java:145)
at it.unimi.dsi.fastutil.objects.AbstractObjectCollection.removeAll(AbstractObjectCollection.java:210)
at axu.l(SourceFile:1068)
at tc.l(SourceFile:493)
at net.minecraft.server.MinecraftServer.b(SourceFile:736)
at sn.b(SourceFile:358)
at net.minecraft.server.MinecraftServer.a(SourceFile:661)
at net.minecraft.server.MinecraftServer.run(SourceFile:564)
at java.lang.Thread.run(Unknown Source)
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I can confirm for my singleplayer worlds.

Attached my crash report while playing on a snapshot world^^

Confirmed SMP. Rolling back to 1.13.0 until this (or MC-134816) notes a fix.
I attached two crash reports with very similar (probably the same) problem. (
[media],
[media])
I can also add to that that it happened for example when a Creeper was exploding underground. This is a case of running a multiplayer server on Java 10
I also added
[media]which seems as a different error caused by same thing.