Game crash under specific circumstances involving dolphins and turtle eggs.

This game crash is easily and reliably reproducible.

I created a small enclosure on land (walls 2 blocks high) filled with one layer of turtle eggs (each turtle egg was stacked to the maximum of 4 eggs). I then spawned a bunch of dolphins on top of the eggs. Because the dolphins are sea creatures and not land creatures, they hop and flop around likely trying to find water, but because they are in my eggy enclosure, they simply crush tons of turtle eggs. Within 3 minutes of the turtle egg massacre beginning, the game crashed and spit out an error, found here:

---- Minecraft Crash Report ----
// Quite honestly, I wouldn't worry myself about that.

Time: 28/07/18 3:08 PM
Description: Ticking entity

java.lang.IllegalArgumentException: Cannot get property bma{name=eggs, clazz=class java.lang.Integer, values=[1, 2, 3, 4]} as it does not exist in Block{minecraft:air}
	at bkr.c(SourceFile:95)
	at big.a(SourceFile:74)
	at big.a(SourceFile:68)
	at big.a(SourceFile:47)
	at aeo.a(SourceFile:806)
	at aex.a(SourceFile:1673)
	at ajq.a(SourceFile:408)
	at aex.k(SourceFile:1974)
	at aey.k(SourceFile:495)
	at aex.R_(SourceFile:1795)
	at aey.R_(SourceFile:279)
	at ajq.R_(SourceFile:246)
	at axs.a(SourceFile:1240)
	at tc.a(SourceFile:581)
	at axs.g(SourceFile:1215)
	at axs.o_(SourceFile:1097)
	at tc.o_(SourceFile:497)
	at net.minecraft.server.MinecraftServer.w(SourceFile:731)
	at net.minecraft.server.MinecraftServer.v(SourceFile:656)
	at dfx.v(SourceFile:157)
	at net.minecraft.server.MinecraftServer.run(SourceFile:559)
	at java.lang.Thread.run(Thread.java:748)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Server thread
Stacktrace:
	at bkr.c(SourceFile:95)
	at big.a(SourceFile:74)
	at big.a(SourceFile:68)
	at big.a(SourceFile:47)
	at aeo.a(SourceFile:806)
	at aex.a(SourceFile:1673)
	at ajq.a(SourceFile:408)
	at aex.k(SourceFile:1974)
	at aey.k(SourceFile:495)
	at aex.R_(SourceFile:1795)
	at aey.R_(SourceFile:279)
	at ajq.R_(SourceFile:246)
	at axs.a(SourceFile:1240)
	at tc.a(SourceFile:581)
	at axs.g(SourceFile:1215)

-- Entity being ticked --
Details:
	Entity Type: minecraft:dolphin (ajq)
	Entity ID: 2986420
	Entity Name: Dolphin
	Entity's Exact location: -126.84, 4.44, 209.62
	Entity's Block location: World: (-127,4,209), Chunk: (at 1,0,1 in -8,13; contains blocks -128,0,208 to -113,255,223), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Entity's Momentum: -0.01, 0.00, 0.05
	Entity's Passengers: []
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at axs.o_(SourceFile:1097)
	at tc.o_(SourceFile:497)

-- Affected level --
Details:
	Level name: New World
	All players: 1 total; [te['SpigotMC'/1, l='New World', x=-128.62, y=7.13, z=205.06]]
	Chunk stats: ServerChunkCache: 625 Drop: 0
	Level seed: -1902813996022450142
	Level generator: ID 01 - flat, ver 0. Features enabled: true
	Level generator options: {}
	Level spawn location: World: (-128,4,208), Chunk: (at 0,0,0 in -8,13; contains blocks -128,0,208 to -113,255,223), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 2700 game time, 2700 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 116857 (now: false), thunder time: 37797 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.w(SourceFile:731)
	at net.minecraft.server.MinecraftServer.v(SourceFile:656)
	at dfx.v(SourceFile:157)
	at net.minecraft.server.MinecraftServer.run(SourceFile:559)
	at java.lang.Thread.run(Thread.java:748)

-- System Details --
Details:
	Minecraft Version: 1.13
	Operating System: Linux (amd64) version 4.15.0-29-generic
	Java Version: 1.8.0_171, Oracle Corporation
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 232077400 bytes (221 MB) / 570425344 bytes (544 MB) up to 2147483648 bytes (2048 MB)
	JVM Flags: 7 total; -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [te['SpigotMC'/1, l='New World', x=-128.62, y=7.13, z=205.06]]
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.