[MC-158484] Game crashes when an illager rides any mob

The bug

The game crashes when an illager rides any mobs (except armor stands and ravagers).

To reproduce

/summon turtle ~ ~ ~ {Passengers:[{id:vindicator}]}

Crash report

19w34a (vindicator riding bee): crash-2019-08-23_13.59.45-server.txt

Description: Ticking entity

java.lang.ClassCastException: class asb$1 cannot be cast to class aqo (asb$1 and aqo are in unnamed module of loader 'app')
	at awk.L(SourceFile:100)
	at ajy.dh(SourceFile:631)
	at ajx.k(SourceFile:2288)
	at ajy.k(SourceFile:487)
	at avu.k(SourceFile:39)
	at aym.k(SourceFile:114)
	at ajx.h(SourceFile:2133)
	at ajy.h(SourceFile:294)
	at avu.h(SourceFile:51)
	at ajo.aN(SourceFile:1648)
	at ajx.aN(SourceFile:2427)
	at wj.a(SourceFile:613)
	at wj.a(SourceFile:591)
	at bit.a(SourceFile:675)
	at wj.a(SourceFile:386)
	at net.minecraft.server.MinecraftServer.b(SourceFile:836)
	at net.minecraft.server.MinecraftServer.a(SourceFile:775)
	at ebt.a(SourceFile:128)
	at net.minecraft.server.MinecraftServer.run(SourceFile:643)
	at java.base/java.lang.Thread.run(Thread.java:835)