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path: root/patches/server/0717-Fix-removing-recipes-from-RecipeIterator.patch
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake <jake.m.potrebic@gmail.com>
Date: Tue, 30 Nov 2021 12:01:56 -0800
Subject: [PATCH] Fix removing recipes from RecipeIterator

== AT ==
public net.minecraft.world.item.crafting.RecipeManager byName

diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/RecipeIterator.java b/src/main/java/org/bukkit/craftbukkit/inventory/RecipeIterator.java
index 65b12eaab871019def074bf17257772ff7f09806..692d9abd715988c96934888b492b93efa64ecce4 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/RecipeIterator.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/RecipeIterator.java
@@ -13,6 +13,7 @@ import org.bukkit.inventory.Recipe;
 public class RecipeIterator implements Iterator<Recipe> {
     private final Iterator<Map.Entry<RecipeType<?>, Object2ObjectLinkedOpenHashMap<ResourceLocation, RecipeHolder<?>>>> recipes;
     private Iterator<RecipeHolder<?>> current;
+    private Recipe currentRecipe; // Paper - fix removing recipes
 
     public RecipeIterator() {
         this.recipes = MinecraftServer.getServer().getRecipeManager().recipes.entrySet().iterator();
@@ -36,15 +37,27 @@ public class RecipeIterator implements Iterator<Recipe> {
     public Recipe next() {
         if (this.current == null || !this.current.hasNext()) {
             this.current = this.recipes.next().getValue().values().iterator();
-            return this.next();
+            // Paper start - fix removing recipes
+            this.currentRecipe = this.next();
+            return this.currentRecipe;
+            // Paper end
         }
 
-        return this.current.next().toBukkitRecipe();
+        // Paper start - fix removing recipes
+        this.currentRecipe = this.current.next().toBukkitRecipe();
+        return this.currentRecipe;
+        // Paper end
     }
 
     @Override
     public void remove() {
         Preconditions.checkState(this.current != null, "next() not yet called");
+
+        // Paper start - fix removing recipes
+        if (this.currentRecipe instanceof org.bukkit.Keyed keyed) {
+            MinecraftServer.getServer().getRecipeManager().byName.remove(org.bukkit.craftbukkit.util.CraftNamespacedKey.toMinecraft(keyed.getKey()));
+        }
+        // Paper end
         this.current.remove();
     }
 }