Crash when dolphins try to chase a boat with a non-living entity as passenger

---- Minecraft Crash Report ----
// On the bright side, I bought you a teddy bear!

Time: 8/17/19 9:10 PM
Description: Ticking entity

java.lang.ClassCastException: axy cannot be cast to aix
	at amy.a(SourceFile:36)
	at aot.a(SourceFile:22)
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:174)
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
	at java.util.Iterator.forEachRemaining(Iterator.java:116)
	at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
	at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
	at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
	at anf.a(SourceFile:69)
	at aiy.dc(SourceFile:623)
	at aix.k(SourceFile:2266)
	at aiy.k(SourceFile:487)
	at aix.h(SourceFile:2111)
	at aiy.h(SourceFile:294)
	at arf.h(SourceFile:259)
	at vk.a(SourceFile:583)
	at bhr.a(SourceFile:675)
	at vk.a(SourceFile:386)
	at net.minecraft.server.MinecraftServer.b(SourceFile:835)
	at net.minecraft.server.MinecraftServer.a(SourceFile:774)
	at eac.a(SourceFile:128)
	at net.minecraft.server.MinecraftServer.run(SourceFile:642)
	at java.lang.Thread.run(Thread.java:745)


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

-- Head --
Thread: Server thread
Stacktrace:
	at amy.a(SourceFile:36)
	at aot.a(SourceFile:22)
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:174)
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
	at java.util.Iterator.forEachRemaining(Iterator.java:116)
	at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
	at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
	at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
	at anf.a(SourceFile:69)
	at aiy.dc(SourceFile:623)
	at aix.k(SourceFile:2266)
	at aiy.k(SourceFile:487)
	at aix.h(SourceFile:2111)
	at aiy.h(SourceFile:294)
	at arf.h(SourceFile:259)
	at vk.a(SourceFile:583)

-- Entity being ticked --
Details:
	Entity Type: minecraft:dolphin (arf)
	Entity ID: 33576
	Entity Name: Dolphin
	Entity's Exact location: 115.68, 58.67, 127.43
	Entity's Block location: World: (115,58,127), Chunk: (at 3,3,15 in 7,7; contains blocks 112,0,112 to 127,255,127), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Entity's Momentum: -0.20, 0.04, 0.00
	Entity's Passengers: []
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at bhr.a(SourceFile:675)
	at vk.a(SourceFile:386)

-- Affected level --
Details:
	All players: 1 total; [vl['RangerA2002'/152, l='The Mechanic', x=101.15, y=75.00, z=130.71]]
	Chunk stats: ServerChunkCache: 2944
	Level dimension: minecraft:overworld
	Level name: The Mechanic
	Level seed: 1796384663999514417
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: {}
	Level spawn location: World: (32,70,240), Chunk: (at 0,4,0 in 2,15; contains blocks 32,0,240 to 47,255,255), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 1621646 game time, 2004472 day time
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 67258 (now: false), thunder time: 31241 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
	at net.minecraft.server.MinecraftServer.b(SourceFile:835)
	at net.minecraft.server.MinecraftServer.a(SourceFile:774)
	at eac.a(SourceFile:128)
	at net.minecraft.server.MinecraftServer.run(SourceFile:642)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 1.14.4
	Minecraft Version ID: 1.14.4
	Operating System: Mac OS X (x86_64) version 10.14.5
	Java Version: 1.8.0_74, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 749095400 bytes (714 MB) / 2013265920 bytes (1920 MB) up to 2147483648 bytes (2048 MB)
	CPUs: 4
	JVM Flags: 8 total; -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
	Player Count: 1 / 8; [vl['RangerA2002'/152, l='The Mechanic', x=101.15, y=75.00, z=130.71]]
	Data Packs: vanilla, file/multitool 1.5.1a (incompatible), file/Cargo Boats 1.0 (incompatible)
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.