PaperMC/nms-patches/InventoryCraftResult.patch

--- a/net/minecraft/server/InventoryCraftResult.java
+++ b/net/minecraft/server/InventoryCraftResult.java
@@ -1,11 +1,44 @@
 package net.minecraft.server;
 
 import javax.annotation.Nullable;
+// CraftBukkit start
+import org.bukkit.Location;
+import org.bukkit.craftbukkit.entity.CraftHumanEntity;
+import org.bukkit.entity.HumanEntity;
+// CraftBukkit end
 
 public class InventoryCraftResult implements IInventory {
 
     private ItemStack[] items = new ItemStack[1];
 
+    // CraftBukkit start
+    private int maxStack = MAX_STACK;
+
+    public ItemStack[] getContents() {
+        return this.items;
+    }
+
+    public org.bukkit.inventory.InventoryHolder getOwner() {
+        return null; // Result slots don't get an owner
+    }
+
+    // Don't need a transaction; the InventoryCrafting keeps track of it for us
+    public void onOpen(CraftHumanEntity who) {}
+    public void onClose(CraftHumanEntity who) {}
+    public java.util.List<HumanEntity> getViewers() {
+        return new java.util.ArrayList<HumanEntity>();
+    }
+
+    public void setMaxStackSize(int size) {
+        maxStack = size;
+    }
+
+    @Override
+    public Location getLocation() {
+        return null;
+    }
+    // CraftBukkit end
+
     public InventoryCraftResult() {}
 
     public int getSize() {
@@ -44,7 +77,7 @@
     }
 
     public int getMaxStackSize() {
-        return 64;
+        return maxStack; // CraftBukkit
     }
 
     public void update() {}