--- a/net/minecraft/server/RecipeBookServer.java +++ b/net/minecraft/server/RecipeBookServer.java @@ -7,6 +7,7 @@ import java.util.List; import org.apache.logging.log4j.LogManager; import org.apache.logging.log4j.Logger; +import org.bukkit.craftbukkit.event.CraftEventFactory; // CraftBukkit public class RecipeBookServer extends RecipeBook { @@ -26,7 +27,7 @@ IRecipe irecipe = (IRecipe) iterator.next(); MinecraftKey minecraftkey = irecipe.getKey(); - if (!this.a.contains(minecraftkey) && !irecipe.c()) { + if (!this.a.contains(minecraftkey) && !irecipe.c() && CraftEventFactory.handlePlayerRecipeListUpdateEvent(entityplayer, minecraftkey)) { // CraftBukkit this.a(minecraftkey); this.c(minecraftkey); list.add(minecraftkey); @@ -60,6 +61,7 @@ } private void a(PacketPlayOutRecipes.Action packetplayoutrecipes_action, EntityPlayer entityplayer, List<MinecraftKey> list) { + if (entityplayer.playerConnection == null) return; // SPIGOT-4478 during PlayerLoginEvent entityplayer.playerConnection.sendPacket(new PacketPlayOutRecipes(packetplayoutrecipes_action, list, Collections.emptyList(), this.c, this.d, this.e, this.f)); }