PaperMC/patches/server/0266-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/io/papermc/paper/util/MCUtil.java b/src/main/java/io/papermc/paper/util/MCUtil.java
index ff8876b7e7cc2172a2cb5e12d6836b9875cc9aa1..b9949b44553a8ac91565b6e614ac7bd7cd140dd0 100644
--- a/src/main/java/io/papermc/paper/util/MCUtil.java
+++ b/src/main/java/io/papermc/paper/util/MCUtil.java
@@ -538,4 +538,19 @@ public final class MCUtil {
     public static int getTicketLevelFor(net.minecraft.world.level.chunk.ChunkStatus status) {
         return net.minecraft.server.level.ChunkMap.MAX_VIEW_DISTANCE + net.minecraft.world.level.chunk.ChunkStatus.getDistance(status);
     }
+
+    @Nullable
+    public static net.minecraft.network.chat.Component getBaseComponentFromNbt(String key, net.minecraft.nbt.CompoundTag compound) {
+        if (!compound.contains(key)) {
+            return null;
+        }
+        String string = compound.getString(key);
+        try {
+            return net.minecraft.network.chat.Component.Serializer.fromJson(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/world/level/BaseCommandBlock.java b/src/main/java/net/minecraft/world/level/BaseCommandBlock.java
index 7f1efe0d9bc059a86166e8e3c5ef4ad23217f6a7..9c7b7434ccd64668eb5d7bb61d03a9cb4105ea6e 100644
--- a/src/main/java/net/minecraft/world/level/BaseCommandBlock.java
+++ b/src/main/java/net/minecraft/world/level/BaseCommandBlock.java
@@ -72,7 +72,7 @@ public abstract class BaseCommandBlock implements CommandSource {
         this.command = nbt.getString("Command");
         this.successCount = nbt.getInt("SuccessCount");
         if (nbt.contains("CustomName", 8)) {
-            this.setName(Component.Serializer.fromJson(nbt.getString("CustomName")));
+            this.setName(io.papermc.paper.util.MCUtil.getBaseComponentFromNbt("CustomName", nbt)); // Paper - Catch ParseException
         }
 
         if (nbt.contains("TrackOutput", 1)) {
diff --git a/src/main/java/net/minecraft/world/level/block/entity/BannerBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/BannerBlockEntity.java
index c6194fa1611412ac119fed493d5eab5a160e593d..d89037a83ae1b6d2afa6a589c1b8098cbedf3d2d 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/BannerBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/BannerBlockEntity.java
@@ -98,7 +98,7 @@ public class BannerBlockEntity extends BlockEntity implements Nameable {
     public void load(CompoundTag nbt) {
         super.load(nbt);
         if (nbt.contains("CustomName", 8)) {
-            this.name = Component.Serializer.fromJson(nbt.getString("CustomName"));
+            this.name = io.papermc.paper.util.MCUtil.getBaseComponentFromNbt("CustomName", nbt); // Paper - Catch ParseException
         }
 
         this.itemPatterns = nbt.getList("Patterns", 10);
diff --git a/src/main/java/net/minecraft/world/level/block/entity/BaseContainerBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/BaseContainerBlockEntity.java
index e85022b31f2bc2783e88f5ba4c5173ac8a096c96..f1acd19432877a833f0d4339f9de4830a0f7b890 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/BaseContainerBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/BaseContainerBlockEntity.java
@@ -31,7 +31,7 @@ public abstract class BaseContainerBlockEntity extends BlockEntity implements Co
         super.load(nbt);
         this.lockKey = LockCode.fromTag(nbt);
         if (nbt.contains("CustomName", 8)) {
-            this.name = Component.Serializer.fromJson(nbt.getString("CustomName"));
+            this.name = io.papermc.paper.util.MCUtil.getBaseComponentFromNbt("CustomName", nbt); // Paper - Catch ParseException
         }
 
     }
diff --git a/src/main/java/net/minecraft/world/level/block/entity/BeaconBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/BeaconBlockEntity.java
index 18349957bd6d1a4bc21aff781a791f912dddff1d..cd28ee0cbc69713a641a21c9a626c694a4bcbfc9 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/BeaconBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/BeaconBlockEntity.java
@@ -389,7 +389,7 @@ public class BeaconBlockEntity extends BlockEntity implements MenuProvider, Name
         this.secondaryPower = BeaconBlockEntity.loadEffect(nbt, "secondary_effect");
         this.levels = nbt.getInt("Levels"); // CraftBukkit - SPIGOT-5053, use where available
         if (nbt.contains("CustomName", 8)) {
-            this.name = Component.Serializer.fromJson(nbt.getString("CustomName"));
+            this.name = io.papermc.paper.util.MCUtil.getBaseComponentFromNbt("CustomName", nbt); // Paper - Catch ParseException
         }
 
         this.lockKey = LockCode.fromTag(nbt);
diff --git a/src/main/java/net/minecraft/world/level/block/entity/EnchantmentTableBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/EnchantmentTableBlockEntity.java
index 3a8bdb788b07b0a8cda3d4b872ede52ca9a005c4..65e1381bb2d10bd212463feb602c60f8fdb9ade1 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/EnchantmentTableBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/EnchantmentTableBlockEntity.java
@@ -42,7 +42,7 @@ public class EnchantmentTableBlockEntity extends BlockEntity implements Nameable
     public void load(CompoundTag nbt) {
         super.load(nbt);
         if (nbt.contains("CustomName", 8)) {
-            this.name = Component.Serializer.fromJson(nbt.getString("CustomName"));
+            this.name = io.papermc.paper.util.MCUtil.getBaseComponentFromNbt("CustomName", nbt); // Paper - Catch ParseException
         }
 
     }