IndexOutOfBoundsException: Index 4 out of bounds for length 4

Server Implementation

Paper

Server Version

1.21.10

Describe the bug

OOB Excepption

[19:18:49] [AsyncNotifyKeyedQueue - 258/ERROR]: Error occurred executing player action
java.lang.ArrayIndexOutOfBoundsException: Index 4 out of bounds for length 4
	at java.base/java.util.ImmutableCollections$ListN.get(ImmutableCollections.java:725) ~[?:?]
	at FastAsyncWorldEdit-Paper-2.15.3.jar/com.sk89q.worldedit.registry.state.AbstractProperty.getValue(AbstractProperty.java:98) ~[FastAsyncWorldEdit-Paper-2.15.3.jar:?]
	at FastAsyncWorldEdit-Paper-2.15.3.jar/com.sk89q.worldedit.world.block.BlockState.getState(BlockState.java:330) ~[FastAsyncWorldEdit-Paper-2.15.3.jar:?]
	at FastAsyncWorldEdit-Paper-2.15.3.jar/com.sk89q.worldedit.world.block.BaseBlock.getState(BaseBlock.java:163) ~[FastAsyncWorldEdit-Paper-2.15.3.jar:?]
	at FastAsyncWorldEdit-Paper-2.15.3.jar/com.sk89q.worldedit.command.tool.BlockDataCyler.handleCycle(BlockDataCyler.java:79) ~[FastAsyncWorldEdit-Paper-2.15.3.jar:?]
	at FastAsyncWorldEdit-Paper-2.15.3.jar/com.sk89q.worldedit.command.tool.BlockDataCyler.actPrimary(BlockDataCyler.java:128) ~[FastAsyncWorldEdit-Paper-2.15.3.jar:?]
	at FastAsyncWorldEdit-Paper-2.15.3.jar/com.sk89q.worldedit.extension.platform.PlatformManager.lambda$handleBlockInteract$2(PlatformManager.java:470) ~[FastAsyncWorldEdit-Paper-2.15.3.jar:?]
	at FastAsyncWorldEdit-Paper-2.15.3.jar/com.sk89q.worldedit.extension.platform.AbstractPlayerActor.lambda$runAction$0(AbstractPlayerActor.java:717) ~[FastAsyncWorldEdit-Paper-2.15.3.jar:?]
	at FastAsyncWorldEdit-Paper-2.15.3.jar/com.fastasyncworldedit.core.util.task.AsyncNotifyKeyedQueue.lambda$run$0(AsyncNotifyKeyedQueue.java:48) ~[FastAsyncWorldEdit-Paper-2.15.3.jar:?]
	at FastAsyncWorldEdit-Paper-2.15.3.jar/com.fastasyncworldedit.core.util.task.AsyncNotifyKeyedQueue.lambda$call$0(AsyncNotifyKeyedQueue.java:58) ~[FastAsyncWorldEdit-Paper-2.15.3.jar:?]
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:328) ~[?:?]
	at FastAsyncWorldEdit-Paper-2.15.3.jar/com.fastasyncworldedit.core.util.task.KeyQueuedExecutorService$KeyRunner.lambda$run$0(KeyQueuedExecutorService.java:150) ~[FastAsyncWorldEdit-Paper-2.15.3.jar:?]
	at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.compute(ForkJoinTask.java:1753) ~[?:?]
	at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.compute(ForkJoinTask.java:1745) ~[?:?]
	at java.base/java.util.concurrent.ForkJoinTask$InterruptibleTask.exec(ForkJoinTask.java:1662) ~[?:?]
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:511) ~[?:?]
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1450) ~[?:?]
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:2019) ~[?:?]
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:187) ~[?:?]
[19:18:51] [AsyncNotifyKeyedQueue - 258/ERROR]: Error occurred executing player action
java.lang.ArrayIndexOutOfBoundsException: null

To Reproduce

Not sure yet

Expected behaviour

No Exception

Screenshots / Videos

No response

Error log (if applicable)

https://mclo.gs/ZQbo0qX#L5524

Fawe Debugpaste

https://athion.net/ISPaster/paste/view/04082c3ff3064d48a1704d2bdb2523ab

Are you interested in contributing a fix?

No

Start with the stack trace at AbstractProperty.java:98 and follow the call through BlockState.getState, BaseBlock.getState, and BlockDataCyler.handleCycle. Use the linked error log and debug paste to identify the player action and block state that trigger the out-of-bounds access. Done means the action no longer produces the exception, with the triggering case verified.