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  1. Minecraft: Java Edition
  2. MC-101228

Multiple hoppers pointing into each other causes crash for Batching chunks caused by ConcurrentModificationException

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    • Confirmation Status:
      Unconfirmed

      Description

      Note

      The exact reason why this happens is unknown. This bug cannot be reproduced in 1.9. This crash was first mentioned for a normal Survival world in this comment.

      The bug

      Having many hoppers pointing into each other crashes the game. This crash is caused by a java.util.ConcurrentModificationException (see attached crash report).

      How to reproduce

      Create a Superflat world with the preset

      3;minecraft:hopper:2;1;
      

      1.9.3-pre1
      Description: Batching chunks
      
      java.util.ConcurrentModificationException
      	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
      	at java.util.ArrayList$Itr.next(ArrayList.java:851)
      	at aht.a(SourceFile:1858)
      	at ase.a(SourceFile:634)
      	at aic.r(SourceFile:63)
      	at bqb.b(SourceFile:160)
      	at bpx.a(SourceFile:100)
      	at bpx.run(SourceFile:43)
      	at java.lang.Thread.run(Thread.java:745)
      

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              • Assignee:
                Unassigned
                Reporter:
                marcono1234 [Mod] Marcono1234
              • Votes:
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                Dates

                • Created:
                  Updated:
                  Resolved: