Paper/nms-patches/RecipeMapClone.patch

--- a/net/minecraft/server/RecipeMapClone.java
+++ b/net/minecraft/server/RecipeMapClone.java
@@ -1,8 +1,12 @@
 package net.minecraft.server;
 
-public class RecipeMapClone implements IRecipe {
+public class RecipeMapClone extends ShapelessRecipes implements IRecipe { // CraftBukkit - added extends
 
-    public RecipeMapClone() {}
+    // CraftBukkit start - Delegate to new parent class
+    public RecipeMapClone() {
+        super("", new ItemStack(Items.MAP, 0, -1), NonNullList.a(RecipeItemStack.a, RecipeItemStack.a(Items.MAP)));
+    }
+    // CraftBukkit end
 
     public boolean a(InventoryCrafting inventorycrafting, World world) {
         int i = 0;