From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Owen1212055 <23108066+Owen1212055@users.noreply.github.com> Date: Wed, 15 Jun 2022 21:52:57 -0400 Subject: [PATCH] Prevent empty items from being added to world The previous solution caused a bunch of bandaid fixes inorder to resolve edge cases where minecraft/the api might spawn items that are air. Just simply prevent them from being added to the world instead. diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java index 653c9c41ab7c5cd332565436564396d18f26c17c..06df21e55fdb70558b85fc095a04b3bb64fbe770 100644 --- a/src/main/java/net/minecraft/server/level/ServerLevel.java +++ b/src/main/java/net/minecraft/server/level/ServerLevel.java @@ -1645,6 +1645,7 @@ public class ServerLevel extends Level implements WorldGenLevel { // WorldServer.LOGGER.warn("Tried to add entity {} but it was marked as removed already", EntityTypes.getKey(entity.getType())); // CraftBukkit return false; } else { + if (entity instanceof net.minecraft.world.entity.item.ItemEntity itemEntity && itemEntity.getItem().isEmpty()) return false; // Paper - Prevent empty items from being added // Paper start - capture all item additions to the world if (captureDrops != null && entity instanceof net.minecraft.world.entity.item.ItemEntity) { captureDrops.add((net.minecraft.world.entity.item.ItemEntity) entity); diff --git a/src/main/java/net/minecraft/world/entity/item/ItemEntity.java b/src/main/java/net/minecraft/world/entity/item/ItemEntity.java index b8db8750125315b15cc3d3e76ee629a60c4546a1..6b3a17e6717b8c03c5bd674771b29e4becd42c71 100644 --- a/src/main/java/net/minecraft/world/entity/item/ItemEntity.java +++ b/src/main/java/net/minecraft/world/entity/item/ItemEntity.java @@ -520,7 +520,7 @@ public class ItemEntity extends Entity implements TraceableEntity { } public void setItem(ItemStack stack) { - com.google.common.base.Preconditions.checkArgument(!stack.isEmpty(), "Cannot drop air"); // CraftBukkit + // com.google.common.base.Preconditions.checkArgument(!stack.isEmpty(), "Cannot drop air"); // CraftBukkit // Paper - Remove check this.getEntityData().set(ItemEntity.DATA_ITEM, stack); this.despawnRate = this.level().paperConfig().entities.spawning.altItemDespawnRate.enabled ? this.level().paperConfig().entities.spawning.altItemDespawnRate.items.getOrDefault(stack.getItem(), this.level().spigotConfig.itemDespawnRate) : this.level().spigotConfig.itemDespawnRate; // Paper }