Fix #346

patches/net/minecraft/world/biome/BiomeDecorator.java.patch

@@ -15,15 +15,40 @@
  public class BiomeDecorator
  {
      public World currentWorld;
-@@ -61,6 +69,7 @@
+@@ -61,6 +69,8 @@
      public int clayPerChunk;
      public int bigMushroomsPerChunk;
      public boolean generateLakes;
 +    private final List<Chunk> chunksToUnload = new ArrayList<Chunk>(); // Spigot
++    private final java.util.concurrent.locks.Lock decorateLock = new java.util.concurrent.locks.ReentrantLock();
      private static final String __OBFID = "CL_00000164";
  
      public BiomeDecorator()
-@@ -194,7 +203,7 @@
+@@ -92,12 +102,8 @@
+ 
+     public void decorateChunk(World p_150512_1_, Random p_150512_2_, BiomeGenBase p_150512_3_, int p_150512_4_, int p_150512_5_)
+     {
+-        if (this.currentWorld != null)
+-        {
+-            throw new RuntimeException("Already decorating!!");
+-        }
+-        else
+-        {
++        decorateLock.lock();
++        try {
+             this.currentWorld = p_150512_1_;
+             this.randomGenerator = p_150512_2_;
+             this.chunk_X = p_150512_4_;
+@@ -105,6 +111,8 @@
+             this.genDecorations(p_150512_3_);
+             this.currentWorld = null;
+             this.randomGenerator = null;
++        } finally {
++            decorateLock.unlock();
+         }
+     }
+ 
+@@ -194,7 +202,7 @@
          {
              k = this.chunk_X + this.randomGenerator.nextInt(16) + 8;
              l = this.chunk_Z + this.randomGenerator.nextInt(16) + 8;
@@ -32,7 +57,7 @@
              WorldGenerator worldgenerator = p_150513_1_.getRandomWorldGenForGrass(this.randomGenerator);
              worldgenerator.generate(this.currentWorld, this.randomGenerator, k, i1, l);
          }
-@@ -204,7 +213,7 @@
+@@ -204,7 +212,7 @@
          {
              k = this.chunk_X + this.randomGenerator.nextInt(16) + 8;
              l = this.chunk_Z + this.randomGenerator.nextInt(16) + 8;
@@ -41,7 +66,7 @@
              (new WorldGenDeadBush(Blocks.deadbush)).generate(this.currentWorld, this.randomGenerator, k, i1, l);
          }
  
-@@ -214,7 +223,7 @@
+@@ -214,7 +222,7 @@
              k = this.chunk_X + this.randomGenerator.nextInt(16) + 8;
              l = this.chunk_Z + this.randomGenerator.nextInt(16) + 8;
  
@@ -50,7 +75,7 @@
              {
                  ;
              }
-@@ -229,7 +238,7 @@
+@@ -229,7 +237,7 @@
              {
                  k = this.chunk_X + this.randomGenerator.nextInt(16) + 8;
                  l = this.chunk_Z + this.randomGenerator.nextInt(16) + 8;
@@ -59,7 +84,7 @@
                  this.mushroomBrownGen.generate(this.currentWorld, this.randomGenerator, k, i1, l);
              }
  
-@@ -237,7 +246,7 @@
+@@ -237,7 +245,7 @@
              {
                  k = this.chunk_X + this.randomGenerator.nextInt(16) + 8;
                  l = this.chunk_Z + this.randomGenerator.nextInt(16) + 8;
@@ -68,7 +93,7 @@
                  this.mushroomRedGen.generate(this.currentWorld, this.randomGenerator, k, i1, l);
              }
          }
-@@ -246,7 +255,7 @@
+@@ -246,7 +254,7 @@
          {
              j = this.chunk_X + this.randomGenerator.nextInt(16) + 8;
              k = this.chunk_Z + this.randomGenerator.nextInt(16) + 8;
@@ -77,7 +102,7 @@
              this.mushroomBrownGen.generate(this.currentWorld, this.randomGenerator, j, l, k);
          }
  
-@@ -254,7 +263,7 @@
+@@ -254,7 +262,7 @@
          {
              j = this.chunk_X + this.randomGenerator.nextInt(16) + 8;
              k = this.chunk_Z + this.randomGenerator.nextInt(16) + 8;
@@ -86,7 +111,7 @@
              this.mushroomRedGen.generate(this.currentWorld, this.randomGenerator, j, l, k);
          }
  
-@@ -263,7 +272,7 @@
+@@ -263,7 +271,7 @@
          {
              k = this.chunk_X + this.randomGenerator.nextInt(16) + 8;
              l = this.chunk_Z + this.randomGenerator.nextInt(16) + 8;
@@ -95,7 +120,7 @@
              this.reedGen.generate(this.currentWorld, this.randomGenerator, k, i1, l);
          }
  
-@@ -271,7 +280,7 @@
+@@ -271,7 +279,7 @@
          {
              k = this.chunk_X + this.randomGenerator.nextInt(16) + 8;
              l = this.chunk_Z + this.randomGenerator.nextInt(16) + 8;
@@ -104,7 +129,7 @@
              this.reedGen.generate(this.currentWorld, this.randomGenerator, k, i1, l);
          }
  
-@@ -280,7 +289,7 @@
+@@ -280,7 +288,7 @@
          {
              j = this.chunk_X + this.randomGenerator.nextInt(16) + 8;
              k = this.chunk_Z + this.randomGenerator.nextInt(16) + 8;
@@ -113,7 +138,7 @@
              (new WorldGenPumpkin()).generate(this.currentWorld, this.randomGenerator, j, l, k);
          }
  
-@@ -289,7 +298,7 @@
+@@ -289,7 +297,7 @@
          {
              k = this.chunk_X + this.randomGenerator.nextInt(16) + 8;
              l = this.chunk_Z + this.randomGenerator.nextInt(16) + 8;
@@ -122,7 +147,7 @@
              this.cactusGen.generate(this.currentWorld, this.randomGenerator, k, i1, l);
          }
  
-@@ -313,6 +322,7 @@
+@@ -313,6 +321,7 @@
              }
          }
  
@@ -130,7 +155,7 @@
          MinecraftForge.EVENT_BUS.post(new DecorateBiomeEvent.Post(currentWorld, randomGenerator, chunk_X, chunk_Z));
      }
  
-@@ -360,6 +370,31 @@
+@@ -360,6 +369,31 @@
          MinecraftForge.ORE_GEN_BUS.post(new OreGenEvent.Post(currentWorld, randomGenerator, chunk_X, chunk_Z));
      }