From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sat, 9 Dec 2017 12:40:25 -0500
Subject: [PATCH] Display warning on deprecated recipe API

Any plugin still using this API will result in the server saving an inconsistent UUID to player data files,
which then triggers warnings such as "Tried to load unrecognized recipe: bukkit:9e5b92f5-e549-4f47-b0a8-9f89390ed77b removed now."
on the players login.

Plugin authors need to define a key to keep it consistent between server restarts.

diff --git a/src/main/java/org/bukkit/inventory/ShapedRecipe.java b/src/main/java/org/bukkit/inventory/ShapedRecipe.java
index 9f9c67e935940833bbfe58e6bfa398e6c86980d5..71e494177473c62449aafda1699b26a0c4c81a68 100644
--- a/src/main/java/org/bukkit/inventory/ShapedRecipe.java
+++ b/src/main/java/org/bukkit/inventory/ShapedRecipe.java
@@ -31,6 +31,7 @@ public class ShapedRecipe extends CraftingRecipe {
     @Deprecated
     public ShapedRecipe(@NotNull ItemStack result) {
         super(NamespacedKey.randomKey(), result);
+        new Throwable("Warning: A plugin is creating a recipe using a Deprecated method. This will cause you to receive warnings stating 'Tried to load unrecognized recipe: bukkit:<ID>'. Please ask the author to give their recipe a static key using NamespacedKey.").printStackTrace(); // Paper
     }
 
     /**
diff --git a/src/main/java/org/bukkit/inventory/ShapelessRecipe.java b/src/main/java/org/bukkit/inventory/ShapelessRecipe.java
index 03839302c94adc3175d0a88065cd230257ffd20d..d6e38c7ccfe3b6e85eafb611da20b1a29fb74d97 100644
--- a/src/main/java/org/bukkit/inventory/ShapelessRecipe.java
+++ b/src/main/java/org/bukkit/inventory/ShapelessRecipe.java
@@ -20,6 +20,7 @@ public class ShapelessRecipe extends CraftingRecipe {
     @Deprecated
     public ShapelessRecipe(@NotNull ItemStack result) {
         super(NamespacedKey.randomKey(), result);
+        new Throwable("Warning: A plugin is creating a recipe using a Deprecated method. This will cause you to receive warnings stating 'Tried to load unrecognized recipe: bukkit:<ID>'. Please ask the author to give their recipe a static key using NamespacedKey.").printStackTrace(); // Paper
     }
 
     /**
