Fixes MC-120780

sources/src/main/java/io/akarin/server/mixin/core/MonsterEggGuardian.java

@@ -12,7 +12,6 @@ import net.minecraft.server.ItemMonsterEgg;
 
 @Mixin(value = ItemMonsterEgg.class, remap = false)
 public class MonsterEggGuardian {
-    
     @Redirect(method = "a", at = @At(
             value = "FIELD",
             target = "net/minecraft/server/Blocks.MOB_SPAWNER:Lnet/minecraft/server/Block;",

sources/src/main/java/io/akarin/server/mixin/optimization/MixinPlayerChunk.java

@@ -0,0 +1,31 @@
+package io.akarin.server.mixin.optimization;
+
+import java.util.List;
+
+import org.spongepowered.asm.lib.Opcodes;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.At.Shift;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import io.akarin.api.Akari;
+import net.minecraft.server.EntityPlayer;
+import net.minecraft.server.PlayerChunk;
+
+@Mixin(value = PlayerChunk.class, remap = false)
+public class MixinPlayerChunk {
+    @Shadow @Final public List<EntityPlayer> c; // PAIL: players
+    
+    @Inject(method = "b", at = @At(
+            value = "INVOKE",
+            target = "net/minecraft/server/PacketPlayOutMapChunk.<init>(Lnet/minecraft/server/Chunk;I)V",
+            opcode = Opcodes.INVOKESPECIAL,
+            shift = Shift.BEFORE
+    ))
+    private void beforeCreateChunkPacket(CallbackInfo ci) {
+        if (c.isEmpty()) ci.cancel(); // Akarin - Fixes MC-120780
+    }
+}

sources/src/main/java/net/minecraft/server/Chunk.java

@@ -21,7 +21,8 @@ import org.bukkit.craftbukkit.util.CraftMagicNumbers; // Paper
 /**
  * <b>Akarin Changes Note</b><br>
  * <br>
- * 1) Expose private members<br>
+ * 1) Add volatile to fields<br>
+ * 2) Expose private members<br>
  * @author cakoyo
  */
 public class Chunk {

sources/src/main/resources/mixins.akarin.core.json

@@ -35,6 +35,7 @@
         "lighting.MixinChunkProviderServer",
         
         "optimization.WeakBigTree",
+        "optimization.MixinPlayerChunk",
         "optimization.WeakEnchantmentManager",
         "optimization.MixinEntityHorseAbstract",
         "optimization.MixinEntityTameableAnimal",