[MC-123606] Server crash: Ticking entity 'java.lang.ClassCastException: ass cannot be cast to aui'

Note

Further information from Alexander Neumann in ~~MC-128068~~:

Villagers get stuck in a doorway opening and closing the door repeatedly. If the door is broken while the villager is continually opening and closing the door, the server will crash.

Crash report

17w50a: crash-2017-12-27_10.20.48-server.txt

Description: Ticking entity

java.lang.ClassCastException: ass cannot be cast to aui
	at aav.a(SourceFile:32)
	at abw.d(SourceFile:28)
	at abe.a(SourceFile:113)
	at zq.cC(SourceFile:643)
	at zp.l(SourceFile:1889)
	at zq.l(SourceFile:503)
	at zd.l(SourceFile:134)
	at zp.H_(SourceFile:1744)
	at zq.H_(SourceFile:283)
	at aqy.a(SourceFile:1570)
	at qt.a(SourceFile:705)
	at aqy.h(SourceFile:1546)
	at aqy.k(SourceFile:1428)
	at qt.k(SourceFile:538)
	at net.minecraft.server.MinecraftServer.w(SourceFile:667)
	at qe.w(SourceFile:352)
	at net.minecraft.server.MinecraftServer.v(SourceFile:592)
	at net.minecraft.server.MinecraftServer.run(SourceFile:497)
	at java.lang.Thread.run(Thread.java:748)

18w15a singleplayer

Description: Ticking entity

java.lang.ClassCastException: ayp cannot be cast to bak
	at adj.a(SourceFile:33)
	at aen.d(SourceFile:28)
	at adu.a(SourceFile:113)
	at acb.cN(SourceFile:646)
	at aca.l(SourceFile:1921)
	at acb.l(SourceFile:506)
	at abo.l(SourceFile:134)
	at aca.T_(SourceFile:1776)
	at acb.T_(SourceFile:286)
	at aut.a(SourceFile:1297)
	at sh.a(SourceFile:705)
	at aut.g(SourceFile:1273)
	at aut.l(SourceFile:1155)
	at sh.l(SourceFile:538)
	at net.minecraft.server.MinecraftServer.w(SourceFile:702)
	at net.minecraft.server.MinecraftServer.v(SourceFile:627)
	at dal.v(SourceFile:155)
	at net.minecraft.server.MinecraftServer.run(SourceFile:532)
	at java.lang.Thread.run(Thread.java:745)