1.12-pre1 crafting error details

Reported exception thrown!
f: Updating screen events
	at bhu.t(SourceFile:1591)
	at bhu.ax(SourceFile:964)
	at bhu.a(SourceFile:404)
	at net.minecraft.client.main.Main.main(SourceFile:123)
Caused by: java.lang.NullPointerException
	at java.util.HashMap.putMapEntries(HashMap.java:500)
	at java.util.HashMap.putAll(HashMap.java:784)
	at bnl.a(SourceFile:192)
	at bnl.a(SourceFile:120)
	at bnk.a(SourceFile:244)
	at bmq.a(SourceFile:200)
	at blz.a(SourceFile:342)
	at bmq.a(SourceFile:159)
	at bld.k(SourceFile:387)
	at bld.p(SourceFile:364)
	at bhu.t(SourceFile:1581)
	... 3 more