From 243a5c2bcdf8d9358aa7b74fb73afe928d400116 Mon Sep 17 00:00:00 2001
From: tr7zw <tr7zw@live.de>
Date: Tue, 22 Oct 2024 22:08:04 +0200
Subject: [PATCH] Fix really stupid edge case of writeCompound

---
 .../java/de/tr7zw/changeme/nbtapi/NBTReflectionUtil.java | 3 +++
 .../tr7zw/nbtapi/plugin/tests/compounds/StreamTest.java  | 9 +++++++++
 2 files changed, 12 insertions(+)

diff --git a/item-nbt-api/src/main/java/de/tr7zw/changeme/nbtapi/NBTReflectionUtil.java b/item-nbt-api/src/main/java/de/tr7zw/changeme/nbtapi/NBTReflectionUtil.java
index 45707fe70..fdfcf460e 100644
--- a/item-nbt-api/src/main/java/de/tr7zw/changeme/nbtapi/NBTReflectionUtil.java
+++ b/item-nbt-api/src/main/java/de/tr7zw/changeme/nbtapi/NBTReflectionUtil.java
@@ -154,6 +154,9 @@ public static Object getCraftItemHandle(ItemStack item) {
     public static void writeApiNBT(NBTCompound comp, OutputStream stream) {
         try {
             Object workingtag = comp.getResolvedObject();
+            if(workingtag == null) {
+                workingtag = ClassWrapper.NMS_NBTTAGCOMPOUND.getClazz().newInstance();
+            }
             ReflectionMethod.NBTFILE_WRITE.run(null, workingtag, stream);
         } catch (Exception e) {
             throw new NbtApiException("Exception while writing NBT!", e);
diff --git a/item-nbt-plugin/src/main/java/de/tr7zw/nbtapi/plugin/tests/compounds/StreamTest.java b/item-nbt-plugin/src/main/java/de/tr7zw/nbtapi/plugin/tests/compounds/StreamTest.java
index 4211ad235..625682691 100644
--- a/item-nbt-plugin/src/main/java/de/tr7zw/nbtapi/plugin/tests/compounds/StreamTest.java
+++ b/item-nbt-plugin/src/main/java/de/tr7zw/nbtapi/plugin/tests/compounds/StreamTest.java
@@ -3,6 +3,10 @@
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 
+import org.bukkit.Material;
+import org.bukkit.inventory.ItemStack;
+
+import de.tr7zw.changeme.nbtapi.NBT;
 import de.tr7zw.changeme.nbtapi.NBTContainer;
 import de.tr7zw.changeme.nbtapi.NbtApiException;
 import de.tr7zw.nbtapi.plugin.tests.Test;
@@ -21,6 +25,11 @@ public void test() throws Exception {
         if (!container.toString().equals(base.getOrCreateCompound("sub").toString())) {
             throw new NbtApiException("Component content did not match! " + base.getCompound("sub") + " " + container);
         }
+        ItemStack item = new ItemStack(Material.STICK);
+        
+        NBT.modify(item, nbt -> {
+            nbt.writeCompound(outStream);
+        });
     }
 
 }