PaperMC/Spigot-Server-Patches/0289-Catch-JsonParseException-in-Entity-and-TE-names.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Zach Brown <zach.brown@destroystokyo.com>
Date: Sat, 22 Sep 2018 15:56:59 -0400
Subject: [PATCH] Catch JsonParseException in Entity and TE names

As a result, data that no longer parses correctly will not crash the server
instead just logging the exception and continuing (and in most cases should
fix the data)

Player data is fixed pretty much immediately but some block data (like
Shulkers) may need to be changed in order for it to re-save properly

No more crashing though.

diff --git a/src/main/java/net/minecraft/server/CommandBlockListenerAbstract.java b/src/main/java/net/minecraft/server/CommandBlockListenerAbstract.java
index 850e79b764513bd68a28b675e075f804f59b75a8..7e13b1cf6d92c3e0f2dab1ba1d42bd4f250e256c 100644
--- a/src/main/java/net/minecraft/server/CommandBlockListenerAbstract.java
+++ b/src/main/java/net/minecraft/server/CommandBlockListenerAbstract.java
@@ -60,7 +60,7 @@ public abstract class CommandBlockListenerAbstract implements ICommandListener {
         this.command = nbttagcompound.getString("Command");
         this.successCount = nbttagcompound.getInt("SuccessCount");
         if (nbttagcompound.hasKeyOfType("CustomName", 8)) {
-            this.setName(IChatBaseComponent.ChatSerializer.a(nbttagcompound.getString("CustomName")));
+            this.setName(MCUtil.getBaseComponentFromNbt("CustomName", nbttagcompound)); // Paper - Catch ParseException
         }
 
         if (nbttagcompound.hasKeyOfType("TrackOutput", 1)) {
diff --git a/src/main/java/net/minecraft/server/MCUtil.java b/src/main/java/net/minecraft/server/MCUtil.java
index 39174bca00b4535e92f6b325b3fd058ceae41f8b..816d55b17ea531bc2f25b92c003b127fe6e04112 100644
--- a/src/main/java/net/minecraft/server/MCUtil.java
+++ b/src/main/java/net/minecraft/server/MCUtil.java
@@ -507,4 +507,19 @@ public final class MCUtil {
                 return null;
         }
     }
+
+    @Nullable
+    public static IChatBaseComponent getBaseComponentFromNbt(String key, NBTTagCompound compound) {
+        if (!compound.hasKey(key)) {
+            return null;
+        }
+        String string = compound.getString(key);
+        try {
+            return IChatBaseComponent.ChatSerializer.jsonToComponent(string);
+        } catch (com.google.gson.JsonParseException e) {
+            org.bukkit.Bukkit.getLogger().warning("Unable to parse " + key + " from " + compound +": " + e.getMessage());
+        }
+
+        return null;
+    }
 }
diff --git a/src/main/java/net/minecraft/server/TileEntityBanner.java b/src/main/java/net/minecraft/server/TileEntityBanner.java
index 4f886c4145325d8fd8217ae3f681632f0396689f..5397d8a69a0326cf73fe0ee1175d1871cac3769d 100644
--- a/src/main/java/net/minecraft/server/TileEntityBanner.java
+++ b/src/main/java/net/minecraft/server/TileEntityBanner.java
@@ -60,7 +60,7 @@ public class TileEntityBanner extends TileEntity implements INamableTileEntity {
     public void load(IBlockData iblockdata, NBTTagCompound nbttagcompound) {
         super.load(iblockdata, nbttagcompound);
         if (nbttagcompound.hasKeyOfType("CustomName", 8)) {
-            this.a = IChatBaseComponent.ChatSerializer.a(nbttagcompound.getString("CustomName"));
+            this.a = MCUtil.getBaseComponentFromNbt("CustomName", nbttagcompound); // Paper - Catch ParseException
         }
 
         if (this.hasWorld()) {
diff --git a/src/main/java/net/minecraft/server/TileEntityContainer.java b/src/main/java/net/minecraft/server/TileEntityContainer.java
index 8f94b9c52c3842b9c32280499aee1b551dc16095..74390aebd353c969353a6efc0904bafe30774d65 100644
--- a/src/main/java/net/minecraft/server/TileEntityContainer.java
+++ b/src/main/java/net/minecraft/server/TileEntityContainer.java
@@ -17,7 +17,7 @@ public abstract class TileEntityContainer extends TileEntity implements IInvento
         super.load(iblockdata, nbttagcompound);
         this.chestLock = ChestLock.b(nbttagcompound);
         if (nbttagcompound.hasKeyOfType("CustomName", 8)) {
-            this.customName = IChatBaseComponent.ChatSerializer.a(nbttagcompound.getString("CustomName"));
+            this.customName = MCUtil.getBaseComponentFromNbt("CustomName", nbttagcompound); // Paper - Catch ParseException
         }
 
     }