PaperMC/nms-patches/RecipeBookClone.patch

--- a/net/minecraft/server/RecipeBookClone.java
+++ b/net/minecraft/server/RecipeBookClone.java
@@ -1,8 +1,11 @@
 package net.minecraft.server;
 
-public class RecipeBookClone implements IRecipe {
+public class RecipeBookClone extends ShapelessRecipes implements IRecipe { // CraftBukkit - added extends
 
-    public RecipeBookClone() {}
+    public RecipeBookClone() {
+        super("", new ItemStack(Items.WRITTEN_BOOK, 0, -1), NonNullList.a(RecipeItemStack.a, RecipeItemStack.a(Items.WRITABLE_BOOK)));
+    }
+    // CraftBukkit end
 
     public boolean a(InventoryCrafting inventorycrafting, World world) {
         int i = 0;