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  1. Minecraft: Java Edition
  2. MC-192889

When placing certain heads or putting them in entities' head slot the game stutters

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Details

    • Bug
    • Status: Resolved
    • Resolution: Fixed
    • 1.16.1, 20w27a, 20w28a, 20w30a, 1.16.2 Pre-release 1, 1.16.2 Pre-release 2, 1.16.2 Release Candidate 1, 1.16.2 Release Candidate 2, 1.16.2, 1.16.3 Release Candidate 1, 1.16.3, 20w46a, 20w49a, 1.16.5, 21w19a
    • 1.17 Pre-release 1
    • None
    • Confirmed
    • Networking, Performance, Textures and models
    • Important

    Description

      Give yourself a head with SkullOwner being the f word (Or any invalid name it seems) then place it on the ground this will make the game stutter this also will happen when putting this head and others on entities.
      This may relate to MC-159202

      Error executing task on Server

      java.util.ConcurrentModificationException
      	at java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:966)
      	at java.util.LinkedList$ListItr.next(LinkedList.java:888)
      	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:146)
      	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 zf.a(SourceFile:345)
      	at zv.a(SourceFile:976)
      	at sq.a(SourceFile:36)
      	at sq.a(SourceFile:10)
      	at nk.a(SourceFile:21)
      	at uy.run(SourceFile:18)
      	at amn.c(SourceFile:144)
      	at amr.c(SourceFile:23)
      	at net.minecraft.server.MinecraftServer.b(SourceFile:763)
      	at net.minecraft.server.MinecraftServer.c(SourceFile:154)
      	at amn.x(SourceFile:118)
      	at net.minecraft.server.MinecraftServer.aZ(SourceFile:745)
      	at net.minecraft.server.MinecraftServer.x(SourceFile:739)
      	at amn.c(SourceFile:127)
      	at net.minecraft.server.MinecraftServer.w(SourceFile:724)
      	at net.minecraft.server.MinecraftServer.v(SourceFile:676)
      	at net.minecraft.server.MinecraftServer.a(SourceFile:256)
      	at java.lang.Thread.run(Thread.java:745)
      

      Error executing task on Client

      java.lang.NullPointerException
      	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:146)
      	at cei.b(SourceFile:130)
      	at cei.f(SourceFile:113)
      	at cei.a(SourceFile:109)
      	at cei.a(SourceFile:62)
      	at dyn.a(SourceFile:1248)
      	at nv.a(SourceFile:55)
      	at nv.a(SourceFile:11)
      	at nk.a(SourceFile:21)
      	at amn.c(SourceFile:144)
      	at amr.c(SourceFile:23)
      	at amn.x(SourceFile:118)
      	at amn.bj(SourceFile:103)
      	at dlx.e(SourceFile:988)
      	at dlx.e(SourceFile:654)
      	at net.minecraft.client.main.Main.main(SourceFile:215)
      

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              slicedlime [Mojang] slicedlime
              O_and_W_W Homepod777
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              Dates

                Created:
                Updated:
                Resolved:
                CHK: