Program: 57941
Project: 57941
Buggy source:
public FastQueue_1_9() throws NoSuchMethodException, RuntimeException {
  methodGetHandleChunk=classCraftChunk.getMethod("String_Node_Str");
  methodInitLighting=classChunk.getMethod("String_Node_Str");
  MapChunk=classMapChunk.getConstructor(classChunk.getRealClass(),boolean.class,int.class);
  classBlockPositionConstructor=classBlockPosition.getConstructor(int.class,int.class,int.class);
  methodW=classWorld.getMethod("String_Node_Str",classBlockPosition.getRealClass());
  fieldSections=classChunk.getField("String_Node_Str");
  fieldWorld=classChunk.getField("String_Node_Str");
  methodGetCombinedId=classBlock.getMethod("String_Node_Str",classIBlockData.getRealClass());
  methodGetByCombinedId=classBlock.getMethod("String_Node_Str",int.class);
  methodGetBlocks=classChunkSection.getMethod("String_Node_Str");
  methodGetType=classChunkSection.getMethod("String_Node_Str",int.class,int.class,int.class);
  methodSetType=classChunkSection.getMethod("String_Node_Str",int.class,int.class,int.class,classIBlockData.getRealClass());
  methodAreNeighborsLoaded=classChunk.getMethod("String_Node_Str",int.class);
  classChunkSectionConstructor=classChunkSection.getConstructor(int.class,boolean.class,char[].class);
  air=methodGetByCombinedId.call(0);
  chunksender=new SendChunk();
  TaskManager.runTaskRepeat(new Runnable(){
    @Override public void run(){
      if (toUpdate.isEmpty()) {
        return;
      }
      int count=0;
      final ArrayList<Chunk> chunks=new ArrayList<Chunk>();
      final Iterator<Entry<ChunkWrapper,Chunk>> i=toUpdate.entrySet().iterator();
      while (i.hasNext() && (count < 128)) {
        chunks.add(i.next().getValue());
        i.remove();
        count++;
      }
      if (count == 0) {
        return;
      }
      update(chunks);
    }
  }
,1);
  MainUtil.initCache();
}

Fixed version (ground truth):
public FastQueue_1_9() throws RuntimeException {
  methodGetHandleChunk=classCraftChunk.getMethod("String_Node_Str");
  methodInitLighting=classChunk.getMethod("String_Node_Str");
  MapChunk=classMapChunk.getConstructor(classChunk.getRealClass(),boolean.class,int.class);
  classBlockPositionConstructor=classBlockPosition.getConstructor(int.class,int.class,int.class);
  methodW=classWorld.getMethod("String_Node_Str",classBlockPosition.getRealClass());
  fieldSections=classChunk.getField("String_Node_Str");
  fieldWorld=classChunk.getField("String_Node_Str");
  methodGetCombinedId=classBlock.getMethod("String_Node_Str",classIBlockData.getRealClass());
  methodGetByCombinedId=classBlock.getMethod("String_Node_Str",int.class);
  methodGetBlocks=classChunkSection.getMethod("String_Node_Str");
  methodGetType=classChunkSection.getMethod("String_Node_Str",int.class,int.class,int.class);
  methodSetType=classChunkSection.getMethod("String_Node_Str",int.class,int.class,int.class,classIBlockData.getRealClass());
  methodAreNeighborsLoaded=classChunk.getMethod("String_Node_Str",int.class);
  classChunkSectionConstructor=classChunkSection.getConstructor(int.class,boolean.class,char[].class);
  air=methodGetByCombinedId.call(0);
  chunksender=new SendChunk();
  TaskManager.runTaskRepeat(new Runnable(){
    @Override public void run(){
      if (toUpdate.isEmpty()) {
        return;
      }
      int count=0;
      final ArrayList<Chunk> chunks=new ArrayList<Chunk>();
      final Iterator<Entry<ChunkWrapper,Chunk>> i=toUpdate.entrySet().iterator();
      while (i.hasNext() && (count < 128)) {
        chunks.add(i.next().getValue());
        i.remove();
        count++;
      }
      if (count == 0) {
        return;
      }
      update(chunks);
    }
  }
,1);
  MainUtil.initCache();
}