Upstream update

README.md

@@ -40,7 +40,7 @@ How To (Plugin Developers)
 <dependency>
     <groupId>io.papermc.paper</groupId>
     <artifactId>paper-api</artifactId>
-    <version>1.21.2-R0.1-SNAPSHOT</version>
+    <version>1.21.3-R0.1-SNAPSHOT</version>
     <scope>provided</scope>
 </dependency>
 ```
@@ -53,7 +53,7 @@ repositories {
 }
 
 dependencies {
-    compileOnly("io.papermc.paper:paper-api:1.21.2-R0.1-SNAPSHOT")
+    compileOnly("io.papermc.paper:paper-api:1.21.3-R0.1-SNAPSHOT")
 }
 
 java {

build.gradle.kts

@@ -67,7 +67,7 @@ repositories {
 }
 
 dependencies {
-    paramMappings("net.fabricmc:yarn:1.21.2+build.1:mergedv2")
+    paramMappings("net.fabricmc:yarn:1.21.3+build.1:mergedv2")
     remapper("net.fabricmc:tiny-remapper:0.10.3:fat")
     decompiler("org.vineflower:vineflower:1.10.1")
     spigotDecompiler("io.papermc:patched-spigot-fernflower:0.1+build.13")

gradle.properties

@@ -1,6 +1,6 @@
 group=io.papermc.paper
-version=1.21.2-R0.1-SNAPSHOT
+version=1.21.3-R0.1-SNAPSHOT
-mcVersion=1.21.2
+mcVersion=1.21.3
 
 # Set to true while updating Minecraft version
 updatingMinecraft=true

patches/api/Add-FeatureFlag-API.patch

@@ -137,7 +137,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    FeatureFlag VANILLA = create("vanilla");
  
      /**
-      * <strong>AVAILABLE BETWEEN VERSIONS:</strong> 1.19.3 - 1.21.2
+      * <strong>AVAILABLE BETWEEN VERSIONS:</strong> 1.19.3 - 1.21.1
 @@ -0,0 +0,0 @@ public interface FeatureFlag extends Keyed {
       * @deprecated not available since 1.21.2
       */

patches/api/Convert-project-to-Gradle.patch

@@ -135,7 +135,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 -
 -    <groupId>org.spigotmc</groupId>
 -    <artifactId>spigot-api</artifactId>
--    <version>1.21.2-R0.1-SNAPSHOT</version>
+-    <version>1.21.3-R0.1-SNAPSHOT</version>
 -    <packaging>jar</packaging>
 -
 -    <name>Spigot-API</name>

patches/server/Fix-equipment-slot-and-group-API.patch

@@ -38,7 +38,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +                throw new IllegalArgumentException("BODY is not valid for players!");
 +                // Paper end
              default:
-                 throw new IllegalArgumentException("Not implemented. This is a bug");
+                 throw new IllegalArgumentException("Could not set slot " + slot + " - not a valid slot for PlayerInventory");
          }
 @@ -0,0 +0,0 @@ public class CraftInventoryPlayer extends CraftInventory implements org.bukkit.i
                  return java.util.Objects.requireNonNullElseGet(this.getChestplate(), () -> new ItemStack(org.bukkit.Material.AIR)); // Paper - make nonnull
@@ -49,7 +49,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +                throw new IllegalArgumentException("BODY is not valid for players!");
 +                // Paper end
              default:
-                 throw new IllegalArgumentException("Not implemented. This is a bug");
+                 throw new IllegalArgumentException("Could not get slot " + slot + " - not a valid slot for PlayerInventory");
          }
 diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644

patches/server/Fix-issues-with-Recipe-API.patch

@@ -24,7 +24,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 @@ -0,0 +0,0 @@ public interface CraftRecipe extends Recipe {
              stack = Ingredient.of(((RecipeChoice.MaterialChoice) bukkit).getChoices().stream().map((mat) -> CraftItemType.bukkitToMinecraft(mat)));
          } else if (bukkit instanceof RecipeChoice.ExactChoice) {
-             stack = Ingredient.ofStacks(((RecipeChoice.ExactChoice) bukkit).getChoices().stream().map((mat) -> CraftItemStack.asNMSCopy(mat)));
+             stack = Ingredient.ofStacks(((RecipeChoice.ExactChoice) bukkit).getChoices().stream().map((mat) -> CraftItemStack.asNMSCopy(mat)).toList());
 +            // Paper start - support "empty" choices
 +        } else if (bukkit == RecipeChoice.empty()) {
 +            stack = Ingredient.of();

patches/server/Make-some-itemstacks-nonnull.patch

@@ -24,5 +24,5 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 -                return this.getHelmet();
 +                return java.util.Objects.requireNonNullElseGet(this.getHelmet(), () -> new ItemStack(org.bukkit.Material.AIR)); // Paper - make nonnull
              default:
-                 throw new IllegalArgumentException("Not implemented. This is a bug");
+                 throw new IllegalArgumentException("Could not get slot " + slot + " - not a valid slot for PlayerInventory");
          }

patches/server/Setup-Gradle-project.patch

@@ -175,7 +175,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 -    <groupId>org.spigotmc</groupId>
 -    <artifactId>spigot</artifactId>
 -    <packaging>jar</packaging>
--    <version>1.21.2-R0.1-SNAPSHOT</version>
+-    <version>1.21.3-R0.1-SNAPSHOT</version>
 -    <name>Spigot</name>
 -    <url>https://www.spigotmc.org/</url>
 -