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 0dc7a827aeacc7fae53b1f975f45883da7db6a0c..6ef4160cb9cc836371a03451bdc3f88c84167ec4 100644 --- a/src/main/java/net/minecraft/server/level/ServerLevel.java +++ b/src/main/java/net/minecraft/server/level/ServerLevel.java @@ -1433,6 +1433,7 @@ 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 ae4b251e10babb07055d031ff48ac7dd5d4be4a0..08f15739dd7e2ab80718ab8d983b483a46309deb 100644 --- a/src/main/java/net/minecraft/world/entity/item/ItemEntity.java +++ b/src/main/java/net/minecraft/world/entity/item/ItemEntity.java @@ -509,7 +509,7 @@ public class ItemEntity extends Entity { } 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.getEntityData().markDirty(ItemEntity.DATA_ITEM); // CraftBukkit - SPIGOT-4591, must mark dirty this.despawnRate = level.paperConfig().entities.spawning.altItemDespawnRate.enabled ? level.paperConfig().entities.spawning.altItemDespawnRate.items.getOrDefault(stack.getItem(), level.spigotConfig.itemDespawnRate) : level.spigotConfig.itemDespawnRate; // Paper