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NPE when accessing CommandSourceStack#getLocation() #13387

Open
Bug
#13400
Open
NPE when accessing CommandSourceStack#getLocation()#13387
Bug
#13400
Labels
status: acceptedDisputed bug is accepted as valid or Feature accepted as desired to be added.version: 1.21.11Game version 1.21.11

Description

@TBlueF
TBlueF
opened on Dec 11, 2025

Stack trace

[Server thread/ERROR]: Error executing task on Server
java.lang.NullPointerException: Cannot invoke "net.minecraft.world.level.Level.getWorld()" because "level" is null
	at io.papermc.paper.command.brigadier.PaperCommandSourceStack.getLocation(PaperCommandSourceStack.java:25) ~[paper-1.21.11.jar:?]
	at bluemap-5.14-paper.jar//de.bluecolored.bluemap.bukkit.BukkitCommandSource.getWorld(BukkitCommandSource.java:69) ~[?:?]
	at bluemap-5.14-paper.jar//de.bluecolored.bluemap.common.commands.Commands.lambda$create$7(Commands.java:82) ~[?:?]
	at bluemap-5.14-paper.jar//de.bluecolored.bluecommands.BlueCommands.checkContext(BlueCommands.java:259) ~[?:?]
	at bluemap-5.14-paper.jar//de.bluecolored.bluecommands.MethodCommandExecutable.isValid(MethodCommandExecutable.java:99) ~[?:?]
	at bluemap-5.14-paper.jar//de.bluecolored.bluecommands.Command.checkValid(Command.java:149) ~[?:?]
	at bluemap-5.14-paper.jar//de.bluecolored.bluecommands.Command.isValid(Command.java:141) ~[?:?]
	at bluemap-5.14-paper.jar//de.bluecolored.bluecommands.brigadier.BrigadierBridge.lambda$createCommandNodes$1(BrigadierBridge.java:86) ~[?:?]
	at net.minecraft.commands.Commands$1.isRestricted(Commands.java:185) ~[paper-1.21.11.jar:1.21.11-38-4446f17]
	at net.minecraft.network.protocol.game.ClientboundCommandsPacket.createEntry(ClientboundCommandsPacket.java:157) ~[paper-1.21.11.jar:1.21.11-38-4446f17]
	at net.minecraft.network.protocol.game.ClientboundCommandsPacket.createEntries(ClientboundCommandsPacket.java:106) ~[paper-1.21.11.jar:1.21.11-38-4446f17]
	at net.minecraft.network.protocol.game.ClientboundCommandsPacket.<init>(ClientboundCommandsPacket.java:48) ~[paper-1.21.11.jar:1.21.11-38-4446f17]
	at net.minecraft.commands.Commands.runSync(Commands.java:535) ~[paper-1.21.11.jar:1.21.11-38-4446f17]
	at net.minecraft.commands.Commands.lambda$sendAsync$7(Commands.java:518) ~[paper-1.21.11.jar:1.21.11-38-4446f17]
	at net.minecraft.server.TickTask.run(TickTask.java:18) ~[paper-1.21.11.jar:1.21.11-38-4446f17]
	at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:177) ~[paper-1.21.11.jar:1.21.11-38-4446f17]
	at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24) ~[paper-1.21.11.jar:1.21.11-38-4446f17]
	at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1527) ~[paper-1.21.11.jar:1.21.11-38-4446f17]
	at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:188) ~[paper-1.21.11.jar:1.21.11-38-4446f17]
	at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:151) ~[paper-1.21.11.jar:1.21.11-38-4446f17]
	at net.minecraft.server.MinecraftServer.runAllTasksAtTickStart(MinecraftServer.java:1179) ~[paper-1.21.11.jar:1.21.11-38-4446f17]
	at net.minecraft.server.MinecraftServer.processPacketsAndTick(MinecraftServer.java:1668) ~[paper-1.21.11.jar:1.21.11-38-4446f17]
	at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1337) ~[paper-1.21.11.jar:1.21.11-38-4446f17]
	at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:388) ~[paper-1.21.11.jar:1.21.11-38-4446f17]
	at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]

Full log: https://mclo.gs/A1izzfx

Plugin and Datapack List

BlueMap 5.14

Actions to reproduce (if known)

Register a command using Commands#register(LiteralCommandNode) and inside the commands ArgumentBuilder#requires() check, try to access the command-sources location.

Then join the server with a player with full permissions (op).

For this test i set-up a fresh paper-server, installed BlueMap, gave myself op-permissions and joined the server:
The error is then thrown here
(commands are registered here).

Paper version

> version
[11:00:34 INFO]: Checking version, please wait...
[11:00:34 INFO]: This server is running Paper version 1.21.11-38-main@4446f17 (2025-12-09T22:51:57Z) (Implementing API version 1.21.11-R0.1-SNAPSHOT)
You are running the latest version

Other

The same scenario/code works fine in any 1.21.10 paper version.

Activity

  1. TBlueF
    added
    status: needs triage
    on Dec 11, 2025
  2. TBlueF
    added the
    Bug
    issue type on Dec 11, 2025
  3. papermc-sniffer
    added
    version: 1.21.11Game version 1.21.11
    on Dec 11, 2025

  4. Doc94 commented on Dec 11, 2025

    @Doc94
    Doc94
    on Dec 11, 2025
    SponsorMember

    Add a simple code who throws the error.

        @Override
    public void onEnable() {
        this.getServer().getPluginManager().registerEvents(this, this);

        final LifecycleEventManager<Plugin> lifecycleManager = this.getLifecycleManager();
        lifecycleManager.registerEventHandler(LifecycleEvents.COMMANDS, event -> {
            final Commands commands = event.registrar();
            commands.register(Commands.literal("test")
                .requires(sender -> {
                    return sender.getLocation() != null; // marked with not null but need for trigger
                })
                .executes(ctx -> {
                    ctx.getSource().getSender().sendPlainMessage(ctx.getSource().getLocation().toString());
                    return Command.SINGLE_SUCCESS;
                }).build()
            );
        });
    }
  5. Doc94
    added
    status: acceptedDisputed bug is accepted as valid or Feature accepted as desired to be added.
    and removed
    status: needs triage
    on Dec 11, 2025
  6. jpenilla
    added 2 commits that reference this issue on Dec 17, 2025

    Attempt to provide position for no permission command source fixes #1…

    4267784

    Attempt to provide position for no permission command source fixes #1…

    f191496

  7. creekorful commented on Jan 4, 2026

    @creekorful
    creekorful
    on Jan 4, 2026

    Hello everyone,

    Fresh update from MC 1.21.9 to 1.21.11 and I am facing the same issue, this make all autocompletion of command impossible.
    Will this be looking at?

    Many thanks and happy new year!

    Cheers

  8. Doc94
    marked Unable to execute commands in console before worlds are loaded #13580 as a duplicate of this issue on Jan 24, 2026
  9. Lulu13022002
    unmarked Unable to execute commands in console before worlds are loaded #13580 as a duplicate of this issue on Jan 24, 2026
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