Details
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Bug
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Resolution: Fixed
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Minecraft 1.13.2-pre1
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None
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Confirmed
Description
The bug
Converted worlds produce the error below in constantly when flying around, and chunks that should get loaded are not being loaded as seen in the screenshot.
The example log took me ~30 seconds to get a few erors.
[16:38:58] [Server thread/FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.util.ConcurrentModificationException
at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.8.0_181]
at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.8.0_181]
at k.a(SourceFile:200) [1.13.2-pre1.jar:?]
at net.minecraft.server.MinecraftServer.b(SourceFile:726) [1.13.2-pre1.jar:?]
at net.minecraft.server.MinecraftServer.a(SourceFile:681) [1.13.2-pre1.jar:?]
at dgh.a(SourceFile:131) [1.13.2-pre1.jar:?]
at net.minecraft.server.MinecraftServer.run(SourceFile:584) [1.13.2-pre1.jar:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_181]
Caused by: java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextNode(Unknown Source) ~[?:1.8.0_181]
at java.util.HashMap$EntryIterator.next(Unknown Source) ~[?:1.8.0_181]
at java.util.HashMap$EntryIterator.next(Unknown Source) ~[?:1.8.0_181]
at bnj.E(SourceFile:1162) ~[1.13.2-pre1.jar:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.8.0_181]
at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.8.0_181]
at k.a(SourceFile:199) ~[1.13.2-pre1.jar:?]
... 5 more
Code analysis
Code analysis by md_5 can be found in this comment.
