From 6b3f4ff9f1bbc1a21ec0b323e444cf24e6582eb9 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Fri, 17 Jun 2016 20:50:11 -0400
Subject: [PATCH] Fix Old Sign Conversion

1) Sign loading code was trying to parse the JSON before the check for oldSign.
   That code could then skip the old sign converting code if it triggers a JSON parse exception.
2) New Mojang Schematic system has Tile Entities in the new converted format, but missing the Bukkit.isConverted flag
   This causes Igloos and such to render broken signs. We fix this by ignoring sign conversion for Defined Structures

diff --git a/src/main/java/net/minecraft/server/DefinedStructure.java b/src/main/java/net/minecraft/server/DefinedStructure.java
index 15c7cc170..2109f316d 100644
--- a/src/main/java/net/minecraft/server/DefinedStructure.java
+++ b/src/main/java/net/minecraft/server/DefinedStructure.java
@@ -218,9 +218,11 @@ public class DefinedStructure {
                                         definedstructure_blockinfo1.c.setInt("x", blockposition1.getX());
                                         definedstructure_blockinfo1.c.setInt("y", blockposition1.getY());
                                         definedstructure_blockinfo1.c.setInt("z", blockposition1.getZ());
+                                        tileentity.isLoadingStructure = true; // Paper
                                         tileentity.load(definedstructure_blockinfo1.c);
                                         tileentity.a(definedstructureinfo.b());
                                         tileentity.a(definedstructureinfo.c());
+                                        tileentity.isLoadingStructure = false; // Paper
                                     }
                                 }
 
diff --git a/src/main/java/net/minecraft/server/TileEntity.java b/src/main/java/net/minecraft/server/TileEntity.java
index 8cab71c0e..2cfe2202e 100644
--- a/src/main/java/net/minecraft/server/TileEntity.java
+++ b/src/main/java/net/minecraft/server/TileEntity.java
@@ -11,6 +11,7 @@ import org.bukkit.inventory.InventoryHolder; // CraftBukkit
 public abstract class TileEntity implements KeyedObject {
 
     public Timing tickTimer = MinecraftTimings.getTileEntityTimings(this); // Paper
+    boolean isLoadingStructure = false; // Paper
     private static final Logger a = LogManager.getLogger();
     private final TileEntityTypes<?> e; public TileEntityTypes getTileEntityType() { return e; } // Paper - OBFHELPER
     protected World world;
diff --git a/src/main/java/net/minecraft/server/TileEntitySign.java b/src/main/java/net/minecraft/server/TileEntitySign.java
index 939d8790f..335a4d27f 100644
--- a/src/main/java/net/minecraft/server/TileEntitySign.java
+++ b/src/main/java/net/minecraft/server/TileEntitySign.java
@@ -49,13 +49,14 @@ public class TileEntitySign extends TileEntity implements ICommandListener {
             }
 
             try {
-                IChatBaseComponent ichatbasecomponent = IChatBaseComponent.ChatSerializer.a(s);
+                //IChatBaseComponent ichatbasecomponent = IChatBaseComponent.ChatSerializer.a(s); // Paper - move down - the old format might throw a json error
 
-                if (oldSign) {
+                if (oldSign && !isLoadingStructure) { // Paper - saved structures will be in the new format, but will not have isConverted
                     lines[i] = org.bukkit.craftbukkit.util.CraftChatMessage.fromString(s)[0];
                     continue;
                 }
                 // CraftBukkit end
+                IChatBaseComponent ichatbasecomponent = IChatBaseComponent.ChatSerializer.a(s); // Paper - after old sign
 
                 if (this.world instanceof WorldServer) {
                     try {
-- 
2.17.1