From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Cryptite <cryptite@gmail.com>
Date: Sat, 6 May 2023 18:14:26 -0500
Subject: [PATCH] Maybe can't tostring?


diff --git a/src/main/java/net/minecraft/nbt/CompoundTag.java b/src/main/java/net/minecraft/nbt/CompoundTag.java
index e464ada187fd1f15efef29a0e5033aeb0c688059..b2e800c653ba423e40de734218a8e4a020069076 100644
--- a/src/main/java/net/minecraft/nbt/CompoundTag.java
+++ b/src/main/java/net/minecraft/nbt/CompoundTag.java
@@ -507,6 +507,9 @@ public class CompoundTag implements Tag {
     @Override
     public CompoundTag copy() {
         // Paper start - reduce memory footprint of NBTTagCompound
+        if (this.tags.size() < 0) {
+            net.minecraft.server.MinecraftServer.LOGGER.debug("Tried to copy an invalid item with negative tags: {}, {}, {}, {}", this.tags, this.tags.getClass().getName());
+        }
         it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap<String, Tag> ret = new it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap<>(this.tags.size(), 0.8f);
         java.util.Iterator<java.util.Map.Entry<String, Tag>> iterator = (this.tags instanceof it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap) ? ((it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap)this.tags).object2ObjectEntrySet().fastIterator() : this.tags.entrySet().iterator();
         while (iterator.hasNext()) {
diff --git a/src/main/java/net/minecraft/world/item/ItemStack.java b/src/main/java/net/minecraft/world/item/ItemStack.java
index 625a852db818d95365ad7ae56e6b1de541bbdada..f721dd923711d65338820642dfca89ab8022e9a5 100644
--- a/src/main/java/net/minecraft/world/item/ItemStack.java
+++ b/src/main/java/net/minecraft/world/item/ItemStack.java
@@ -765,7 +765,11 @@ public final class ItemStack {
 
             itemstack.setPopTime(this.getPopTime());
             if (this.tag != null) {
-                itemstack.tag = this.tag.copy();
+                if (this.tag.tags.size() < 0) {
+                    ItemStack.LOGGER.debug("Tried to copy an invalid item with negative tags: {}, {}, {}, {}", this.tag, this.tag.tags, this.tag.tags.getClass().getName());
+                } else {
+                    itemstack.tag = this.tag.copy();
+                }
             }
 
             return itemstack;