Crash when executing /neoforge tags minecraft:worldgen/biome get with any parameter.

[Thomas1034]

When I attempted to run /neoforge tags minecraft:worldgen/biome get c:is_cold/overworld in a world (run from the development environment), I was presented with this error:

[22:20:46] [Server thread/ERROR] [minecraft/Commands]: '/neoforge tags minecraft:worldgen/biome get c:is_cold/overworld' threw an exception
java.lang.ClassCastException: class net.minecraft.tags.TagKey cannot be cast to class net.minecraft.resources.ResourceKey (net.minecraft.tags.TagKey and net.minecraft.resources.ResourceKey are in module [email protected] of loader 'TRANSFORMER' @4b2a30d)
	at TRANSFORMER/[email protected]/net.neoforged.neoforge.server.command.TagsCommand.listTagElements(TagsCommand.java:125) ~[neoforge-21.4.54-beta-minecraft.jar%23216!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.neoforged.neoforge.server.command.TagsCommand.lambda$register$7(TagsCommand.java:82) ~[neoforge-21.4.54-beta-minecraft.jar%23216!/:?] {re:classloading}
	at MC-BOOTSTRAP/[email protected]/com.mojang.brigadier.context.ContextChain.runExecutable(ContextChain.java:73) ~[brigadier-1.3.10.jar%23138!/:?] {}
	at TRANSFORMER/[email protected]/net.minecraft.commands.execution.tasks.ExecuteCommand.execute(ExecuteCommand.java:29) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.commands.execution.tasks.ExecuteCommand.execute(ExecuteCommand.java:13) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.commands.execution.UnboundEntryAction.lambda$bind$0(UnboundEntryAction.java:8) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.commands.execution.CommandQueueEntry.execute(CommandQueueEntry.java:5) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.commands.execution.ExecutionContext.runCommandQueue(ExecutionContext.java:103) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.commands.Commands.executeCommandInContext(Commands.java:368) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.commands.Commands.performCommand(Commands.java:289) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.server.network.ServerGamePacketListenerImpl.performUnsignedChatCommand(ServerGamePacketListenerImpl.java:1382) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.server.network.ServerGamePacketListenerImpl.lambda$handleChatCommand$7(ServerGamePacketListenerImpl.java:1369) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.server.TickTask.run(TickTask.java:18) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:155) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:905) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:177) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:126) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:888) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:882) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.util.thread.BlockableEventLoop.runAllTasks(BlockableEventLoop.java:115) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:851) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:735) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:278) ~[neoforge-21.4.54-beta-minecraft.jar%23215!/:?] {re:classloading,pl:accesstransformer:B}
	at java.base/java.lang.Thread.run(Thread.java:1583) [?:?] {}

As you can see, a TagKey apparently cannot be cast to a ResourceKey.

[dhyces]

Can confirm, code was incorrectly adjusted to <ResourceKey>cast rather than <TagKey>cast commit e18c200. Affects 1.21.4 back down to 1.21.2.

[neoforged-releases]

🚀 This issue has been resolved in NeoForge version 21.4.57-beta, as part of #1851.