[MC-180447] Game crash when placing player head down

crash-2020-06-30_18.46.05-client.txt Game crashes when placing down a head.

Potentially related to user cache. I had seen the user before ingame.

Unable to recreate the issue anymore, happened twice and dissappeared.
Head was obtained by doing

/give @p minecraft:player_head{SkullOwner:{Name:"Username"}} 1

Stack trace

1.16.1: crash-2020-06-30_18.46.05-client.txt

Description: Unexpected error

java.lang.NullPointerException: Unexpected error
	at java.util.LinkedList$ListItr.next(LinkedList.java:893)
	at com.google.common.collect.Iterators$8.next(Iterators.java:896)
	at com.google.common.collect.Iterators.addAll(Iterators.java:367)
	at com.google.common.collect.Lists.newArrayList(Lists.java:165)
	at abl.a(SourceFile:214)
	at abl.c(SourceFile:198)
	at abl.a(SourceFile:118)
	at abl.a(SourceFile:98)
	at abl.a(SourceFile:142)
	at cei.b(SourceFile:130)
	at cei.f(SourceFile:113)
	at cei.a(SourceFile:109)
	at bzw.a(SourceFile:43)
	at bim.a(SourceFile:81)
	at bim.a(SourceFile:41)
	at bki.a(SourceFile:213)
	at dyp.a(SourceFile:332)
	at dlx.aK(SourceFile:1425)
	at dlx.aL(SourceFile:1659)
	at dlx.q(SourceFile:1507)
	at dlx.e(SourceFile:994)
	at dlx.e(SourceFile:654)
	at net.minecraft.client.main.Main.main(SourceFile:215)

1.15.2: crash-2020-04-24_15.29.42-client.txt

Description: Unexpected error

java.lang.NullPointerException: Unexpected error
	at java.util.LinkedList$ListItr.next(LinkedList.java:893)
	at com.google.common.collect.Iterators$8.next(Iterators.java:896)
	at com.google.common.collect.Iterators.addAll(Iterators.java:367)
	at com.google.common.collect.Lists.newArrayList(Lists.java:165)
	at zk.a(SourceFile:214)
	at zk.c(SourceFile:198)
	at zk.a(SourceFile:118)
	at zk.a(SourceFile:98)
	at zk.a(SourceFile:142)
	at bxi.b(SourceFile:124)
	at bxi.f(SourceFile:108)
	at bxi.a(SourceFile:104)
	at btd.a(SourceFile:45)
	at bcp.a(SourceFile:81)
	at bcp.a(SourceFile:41)
	at ben.a(SourceFile:194)
	at dnr.a(SourceFile:327)
	at dbn.aH(SourceFile:1363)
	at dbn.aI(SourceFile:1598)
	at dbn.p(SourceFile:1445)
	at dbn.d(SourceFile:964)
	at dbn.d(SourceFile:619)
	at net.minecraft.client.main.Main.main(SourceFile:204)