The bug

When a player changes dimension or relogs with a full inventory, the game will crash.

Crash report

1. Singleplayer crash report

   ---- Minecraft Crash Report ----
   // Uh... Did I do that?
   
   Time: 4/20/17 11:15 PM
   Description: Ticking player
   
   java.lang.ArrayIndexOutOfBoundsException
   
   
   A detailed walkthrough of the error, its code path and all known details is as follows:
   ---------------------------------------------------------------------------------------
   
   -- Head --
   Thread: Server thread
   Stacktrace:
   	at ns.k_(SourceFile:385)
   
   -- Player being ticked --
   Details:
   	Entity Type: null (ns)
   	Entity ID: 68
   	Entity Name: PlayerName
   	Entity's Exact location: 116.33, -237.44, -92.41
   	Entity's Block location: World: (116,-238,-93), Chunk: (at 4,-15,3 in 7,-6; contains blocks 112,0,-96 to 127,255,-81), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
   	Entity's Momentum: 0.00, -3.46, 0.00
   	Entity's Passengers: []
   	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
   Stacktrace:
   	at ns.k_(SourceFile:385)
   	at oc.G_(SourceFile:182)
   	at gd.a(SourceFile:231)
   	at ob.c(SourceFile:187)
   	at net.minecraft.server.MinecraftServer.D(SourceFile:652)
   	at net.minecraft.server.MinecraftServer.C(SourceFile:562)
   	at cfz.C(SourceFile:154)
   	at net.minecraft.server.MinecraftServer.run(SourceFile:466)
   	at java.lang.Thread.run(Thread.java:745)
   
   -- Ticking connection --
   Details:
   	Connection: gd@7c7793d3
   
   -- System Details --
   Details:
   	Minecraft Version: 17w16a
   	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: 130807080 bytes (124 MB) / 375955456 bytes (358 MB) up to 1060372480 bytes (1011 MB)
   	JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
   	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
   	Profiler Position: N/A (disabled)
   	Player Count: 1 / 8; [ns[''/68, l='Redstone', x=116.33, y=-237.44, z=-92.41]]
   	Type: Integrated Server (map_client.txt)
   	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.
   

2. Multiplayer crash report

   ---- Minecraft Crash Report ----
   // Don't do that.
   
   Time: 4/20/17 11:22 PM
   Description: Exception in server tick loop
   
   java.lang.ArrayIndexOutOfBoundsException
   
   
   A detailed walkthrough of the error, its code path and all known details is as follows:
   ---------------------------------------------------------------------------------------
   
   -- System Details --
   Details:
   	Minecraft Version: 17w16a
   	Operating System: Windows 10 (amd64) version 10.0
   	Java Version: 1.8.0_121, Oracle Corporation
   	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
   	Memory: 780051464 bytes (743 MB) / 885522432 bytes (844 MB) up to 1908932608 bytes (1820 MB)
   	JVM Flags: 0 total; 
   	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
   	Profiler Position: N/A (disabled)
   	Player Count: 1 / 20; [ns[''/224, l='world', x=177.70, y=70.00, z=252.73]]
   	Is Modded: Unknown (can't tell)
   	Type: Dedicated Server (map_server.txt)
   

Note that when the server crashes while entering the nether the player will log back in at the overworld coordinates, but in the nether.