[MC-131783] Crash on breaking 1.12.2 -> 1.13-pre5 upgraded banner

Title + crash report. I was able to repeat the crash 4 times so far.

(1.13-pre5) crash-2018-06-30_10.04.18-server.txt

Description: Ticking player

java.lang.ClassCastException: bbg cannot be cast to bbe
	at bic.k(SourceFile:219)
	at bic.j(SourceFile:206)
	at bbe.a(SourceFile:71)
	at ta.b(SourceFile:241)
	at ta.a(SourceFile:94)
	at sz.R_(SourceFile:319)
	at axc.a(SourceFile:1237)
	at sx.a(SourceFile:577)
	at axc.g(SourceFile:1213)
	at sx.o_(SourceFile:516)
	at axc.l(SourceFile:1078)
	at sx.l(SourceFile:493)
	at net.minecraft.server.MinecraftServer.w(SourceFile:705)
	at net.minecraft.server.MinecraftServer.v(SourceFile:631)
	at dej.v(SourceFile:155)
	at net.minecraft.server.MinecraftServer.run(SourceFile:535)
	at java.lang.Thread.run(Thread.java:745)

Steps to reproduce

Place a banner in version 1.12.2
Upgrade the world from 1.12.2 to 1.13-pre5
Switch to survival mode
Breaking banner by hand or axe causes a crash.