Opening inventory of Nautilus mob in 1.21.11 crashes server with null pointer exception

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    • Type: Bug
    • Resolution: Done
    • Priority: Minor
    • None
    • Affects Version/s: None
    • None
    • Environment:
    • CraftBukkit version 4577-Spigot-66411b9-7f7a082 (MC: 1.21.11) (Implementing API version 1.21.11-R0.1-SNAPSHOT)
    • Yes

      The server crashes when anybody tries to open their inventory while mounting the new natuilus mob added in 1.21.11.

       

      ---- Minecraft Crash Report ----
      // Uh... Did I do that?Time: 2025-12-13 20:37:47
      Description: Ticking entityjava.lang.NullPointerException: Cannot invoke "org.bukkit.inventory.InventoryHolder.getInventory()" because the return value of "net.minecraft.world.IInventory.getOwner()" is null
              at net.minecraft.world.inventory.AbstractMountInventoryMenu.getBukkitView(AbstractMountInventoryMenu.java:34)
              at org.bukkit.craftbukkit.v1_21_R7.event.CraftEventFactory.handleInventoryCloseEvent(CraftEventFactory.java:1461)
              at net.minecraft.server.level.EntityPlayer.r(EntityPlayer.java:1851)
              at net.minecraft.server.level.EntityPlayer.g(EntityPlayer.java:745)
              at net.minecraft.server.level.WorldServer.a(WorldServer.java:946)
              at net.minecraft.world.level.World.a(World.java:626)
              at net.minecraft.server.level.WorldServer.lambda$tick$2(WorldServer.java:475)
              at net.minecraft.world.level.entity.EntityTickList.a(SourceFile:53)
              at net.minecraft.server.level.WorldServer.a(WorldServer.java:457)
              at net.minecraft.server.MinecraftServer.c(MinecraftServer.java:1592)
              at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:1421)
              at net.minecraft.server.dedicated.DedicatedServer.a(DedicatedServer.java:429)
              at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:1456)
              at net.minecraft.server.MinecraftServer.A(MinecraftServer.java:1122)
              at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:340)
              at java.base/java.lang.Thread.run(Unknown Source) 

      Full crash logs uploaded to crash.txt

       

        1. crash.txt
          56 kB
          Minuteman General

            Assignee:
            Unassigned
            Reporter:
            Minuteman General
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              Created:
              Updated:
              Resolved: