I am trying to make a command to open a crafting table gui, when i run the command, it crashes the server. here is the code i have for the command:
 

@Override
    public CommandResult execute(CommandSource src, CommandContext args) throws CommandException {
        if (src instanceof EntityPlayer) {
            EntityPlayer player = (EntityPlayer) src;
            player.displayGui(new BlockWorkbench.InterfaceCraftingTable(player.worldObj, player.playerLocation));
            player.addStat(StatList.CRAFTING_TABLE_INTERACTION);

        } else {
            src.sendMessage(Text.of(TextColors.RED, "Must be a player to run this command"));
        }
        return CommandResult.success();
    }

and this is the error it sends to the logs:
 

Spoiler

2017-11-12 07:10:10 | [nucleus]: Elrol_Arrowsend ran the command: /wb 
2017-11-12 07:10:10 | [ERROR] Encountered an unexpected exception
2017-11-12 07:10:10 | [RAW] net.minecraft.util.ReportedException: Ticking player
2017-11-12 07:10:10 | [RAW]     at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:715) ~[MinecraftServer.class:?]
2017-11-12 07:10:10 | [RAW]     at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:387) ~[ld.class:?]
2017-11-12 07:10:10 | [RAW]     at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613) ~[MinecraftServer.class:?]
2017-11-12 07:10:10 | [RAW]     at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471) [MinecraftServer.class:?]
2017-11-12 07:10:10 | [RAW]     at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]
2017-11-12 07:10:10 | [RAW] Caused by: java.lang.NullPointerException
2017-11-12 07:10:10 | [RAW]     at net.minecraft.world.WorldServer.func_180495_p(WorldServer.java:3091) ~[ls.class:?]
2017-11-12 07:10:10 | [RAW]     at net.minecraft.inventory.ContainerWorkbench.func_75145_c(SourceFile:74) ~[abm.class:?]
2017-11-12 07:10:10 | [RAW]     at net.minecraft.entity.player.EntityPlayerMP.func_70071_h_(EntityPlayerMP.java:256) ~[lu.class:?]
2017-11-12 07:10:10 | [RAW]     at org.spongepowered.common.event.tracking.TrackingUtil.tickEntity(TrackingUtil.java:159) ~[TrackingUtil.class:1.10.2-2281-5.2.0-BETA-2424]
2017-11-12 07:10:10 | [RAW]     at net.minecraft.world.WorldServer.redirect$onCallEntityUpdate$zka000(WorldServer.java:2843) ~[ls.class:?]
2017-11-12 07:10:10 | [RAW]     at net.minecraft.world.World.func_72866_a(World.java:4072) ~[aid.class:?]
2017-11-12 07:10:10 | [RAW]     at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:839) ~[ls.class:?]
2017-11-12 07:10:10 | [RAW]     at net.minecraft.world.World.func_72870_g(World.java:1934) ~[aid.class:?]
2017-11-12 07:10:10 | [RAW]     at net.minecraft.world.WorldServer.func_184147_l(WorldServer.java:649) ~[ls.class:?]
2017-11-12 07:10:10 | [RAW]     at net.minecraft.world.World.func_72939_s(World.java:5981) ~[aid.class:?]
2017-11-12 07:10:10 | [RAW]     at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:2185) ~[ls.class:?]
2017-11-12 07:10:10 | [RAW]     at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:709) ~[MinecraftServer.class:?]
2017-11-12 07:10:10 | [RAW]     ... 4 more
2017-11-12 07:10:10 # server crashed for unknown reason, restarting...

If you can tell me what im doing wrong that would help. I know that the crash was caused by the world object being null, but how is that possible when i take it right from the player? The code i am using to open the gui is the same as the way minecraft does it when a player activates the crafting bench. I am assuming there is a better way to do it, but I am not sure what it would be.

Edited November 12, 20177 yr by Elrol_Arrowsend

Ok, well good to know about the playerLocation, that explains alot really. Ok thanks for the help, i will see what i can do.

well now i have the command place a crafting table at 0, 1, 0 and it opened the gui for a split second. the issue is that now its too far away that the player cant open it, there is only one way i can think of getting it to work, and that is to set a block around them to the crafting table and when they close the ui to remove the table, is there a better way to do it without having players need the mod too?

 

Edited November 12, 20177 yr by Elrol_Arrowsend

dang, aright, thanks