[MC-162936] java.lang.IllegalArgumentException when using an enchanted totem of undying

The bug

If you enchant a Totem of Undying with any enchantment (using an anvil in creative mode), the game crashes.

Video

https://www.youtube.com/watch?v=QZfhf9NWvhg

Stack trace

19w40a: crash-2019-10-07_20.50.46-client.txt

java.lang.IllegalArgumentException: Duplicate delegates
	at cxv.<init>(SourceFile:12)
	at dut.a(SourceFile:121)
	at dut.a(SourceFile:111)
	at dut.a(SourceFile:187)
	at dut.a(SourceFile:177)
	at dpn.a(SourceFile:788)
	at dpn.a(SourceFile:583)
	at das.d(SourceFile:931)
	at das.b(SourceFile:569)
	at net.minecraft.client.main.Main.main(SourceFile:199)