[MC-75885] World generator crashes when generating pumpkins (e.g. seed "Cows")

Minecraft remains at the "Building Terrain" screen when "Cows" (without the quotes) is used as the world generating seed. Crash report is attached.

java.lang.NullPointerException: Exception in server tick loop
	at azi.a(SourceFile:124)
	at azi.apply(SourceFile:121)
	at beh.a(SourceFile:53)
	at beh.apply(SourceFile:50)
	at bei.a(SourceFile:67)
	at bei.a(SourceFile:90)
	at azh.f(SourceFile:49)
	at azh.c(SourceFile:39)
	at bff.a(SourceFile:551)
	at aqr.a(SourceFile:290)
	at bif.b(SourceFile:20)
	at arv.a(SourceFile:261)
	at arv.a(SourceFile:49)
	at arj.a(SourceFile:389)
	at asn.a(SourceFile:56)
	at bgt.a(SourceFile:472)
	at qt.a(SourceFile:174)
	at bff.a(SourceFile:872)
	at qt.c(SourceFile:104)
	at net.minecraft.server.MinecraftServer.k(SourceFile:314)
	at cyk.a(SourceFile:111)
	at cyk.i(SourceFile:127)
	at net.minecraft.server.MinecraftServer.run(SourceFile:418)
	at java.lang.Thread.run(Thread.java:745)