java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

Server Implementation

Paper

Server Version

1.20.2

Describe the bug

When this player joins the server this error is printed:

[09:42:01 INFO]: UUID of player yefreitor is f7c78a7c-f655-44e6-a40b-5ea36782c1f1
[09:42:01 WARN]: java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
[09:42:01 WARN]:        at java.base/jdk.internal.util.Preconditions$1.apply(Preconditions.java:55)
[09:42:01 WARN]:        at java.base/jdk.internal.util.Preconditions$1.apply(Preconditions.java:52)
[09:42:01 WARN]:        at java.base/jdk.internal.util.Preconditions$4.apply(Preconditions.java:213)
[09:42:01 WARN]:        at java.base/jdk.internal.util.Preconditions$4.apply(Preconditions.java:210)
[09:42:01 WARN]:        at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:98)
[09:42:01 WARN]:        at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:106)
[09:42:01 WARN]:        at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:302)
[09:42:01 WARN]:        at java.base/java.lang.String.checkIndex(String.java:4575)
[09:42:01 WARN]:        at java.base/java.lang.StringLatin1.charAt(StringLatin1.java:46)
[09:42:01 WARN]:        at java.base/java.lang.String.charAt(String.java:1535)
[09:42:01 WARN]:        at FastAsyncWorldEdit-Bukkit-2.8.2.jar//com.sk89q.worldedit.world.entity.EntityTypes.convertEntityId(EntityTypes.java:472)
[09:42:01 WARN]:        at FastAsyncWorldEdit-Bukkit-2.8.2.jar//com.sk89q.worldedit.world.entity.EntityTypes.parse(EntityTypes.java:481)
[09:42:01 WARN]:        at FastAsyncWorldEdit-Bukkit-2.8.2.jar//com.sk89q.worldedit.entity.BaseEntity.<init>(BaseEntity.java:118)
[09:42:01 WARN]:        at FastAsyncWorldEdit-Bukkit-2.8.2.jar//com.fastasyncworldedit.core.extent.clipboard.DiskOptimizedClipboard.loadNBTFromFileFooter(DiskOptimizedClipboard.java:270)
[09:42:01 WARN]:        at FastAsyncWorldEdit-Bukkit-2.8.2.jar//com.fastasyncworldedit.core.extent.clipboard.DiskOptimizedClipboard.<init>(DiskOptimizedClipboard.java:198)
[09:42:01 WARN]:        at FastAsyncWorldEdit-Bukkit-2.8.2.jar//com.fastasyncworldedit.core.extent.clipboard.DiskOptimizedClipboard.<init>(DiskOptimizedClipboard.java:167)
[09:42:01 WARN]:        at FastAsyncWorldEdit-Bukkit-2.8.2.jar//com.fastasyncworldedit.core.extent.clipboard.DiskOptimizedClipboard.loadFromFile(DiskOptimizedClipboard.java:223)
[09:42:01 WARN]:        at FastAsyncWorldEdit-Bukkit-2.8.2.jar//com.sk89q.worldedit.LocalSession.lambda$loadClipboardFromDisk$1(LocalSession.java:921)
[09:42:01 WARN]:        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
[09:42:01 WARN]:        at FastAsyncWorldEdit-Bukkit-2.8.2.jar//com.fastasyncworldedit.core.util.task.KeyQueuedExecutorService$KeyRunner.lambda$run$0(KeyQueuedExecutorService.java:150)
[09:42:01 WARN]:        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
[09:42:01 WARN]:        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
[09:42:01 WARN]:        at java.base/java.lang.Thread.run(Thread.java:1623)
[09:42:01 INFO]: yefreitor[/*:54562] logged in with entity id 3161 at ([plotworld]-2090.565644499244, 68.49120751720224, -37060.77915434401)

To Reproduce

1. Not sure

Expected behaviour

No error in console

Screenshots / Videos

No response

Error log (if applicable)

No response

Fawe Debugpaste

https://athion.net/ISPaster/paste/view/d3dcbe34a5a2403cb2fe8a94deac18fc

Fawe Version

FastAsyncWorldEdit-Bukkit-2.8.2.jar

Checklist

• I have included a Fawe debugpaste.
• I am using the newest build from https://ci.athion.net/job/FastAsyncWorldEdit/ and the issue still persists.

Anything else?

No response

Start with EntityTypes.convertEntityId and parse in the stack trace, then follow the call from BaseEntity through DiskOptimizedClipboard.loadNBTFromFileFooter and LocalSession.loadClipboardFromDisk. Use the linked FAWE debugpaste and the reported join-time clipboard-loading path to identify the empty value; done means the join no longer logs this exception.