Program: 95550
Project: 95550
Buggy source:
/** 
 * Handles right-clicks from the player. Allows the player to 'use' the block. TODO: Clean up this horrible mess of a method.
 * @return if the right-click was consumed.
 */
@Override public boolean onBlockActivated(World world,BlockPos pos,IBlockState state,EntityPlayer player,EnumHand hand,ItemStack heldItem,EnumFacing side,float hitX,float hitY,float hitZ){
  if (world.isRemote) {
    return true;
  }
  TileEntity te=world.getTileEntity(pos);
  if (te instanceof TileEntityCrop) {
    TileEntityCrop crop=(TileEntityCrop)te;
    if (AgriCraftItems.enableHandRake && crop.hasWeed() && heldItem == null) {
      return false;
    }
 else     if (player.isSneaking() || heldItem == null || heldItem.getItem() == null) {
      this.harvest(world,pos,state,player,crop);
    }
 else     if (heldItem.getItem() instanceof IRake || heldItem.getItem() instanceof IClipper) {
      return false;
    }
 else     if (heldItem.getItem() instanceof ItemAgriCraftSeed && !crop.isCrossCrop() && !crop.hasWeed()) {
      IAgriPlant plant=CropPlantHandler.getPlantFromStack(heldItem);
      if (plant != null && plant.getGrowthRequirement().canGrow(world,pos)) {
        crop.setStat(new PlantStats());
        crop.setPlant(plant);
        if (!player.capabilities.isCreativeMode) {
          heldItem.stackSize--;
        }
      }
    }
 else     if (heldItem.getItem() == AgriCraftItems.crops) {
      this.setCrossCrop(world,pos,state,player,heldItem);
    }
 else     if (heldItem.getItem() instanceof ITrowel) {
      crop.onTrowelUsed((ITrowel)heldItem.getItem(),heldItem);
    }
 else     if (heldItem.getItem() == net.minecraft.init.Items.dye && heldItem.getItemDamage() == 15) {
      return !crop.canBonemeal();
    }
 else     if (heldItem.getItem() instanceof IAgriFertilizer) {
      IAgriFertilizer fertilizer=(IAgriFertilizer)heldItem.getItem();
      if (crop.acceptsFertilizer(fertilizer)) {
        crop.applyFertilizer(fertilizer,world.rand);
        NetworkWrapper.getInstance().sendToAllAround(new MessageFertilizerApplied(heldItem,pos),new NetworkRegistry.TargetPoint(world.provider.getDimension(),pos.getX(),pos.getY(),pos.getZ(),32));
        if (!player.capabilities.isCreativeMode) {
          heldItem.stackSize=heldItem.stackSize - 1;
        }
      }
      return false;
    }
 else     if (heldItem.getItem() instanceof ItemDebugger) {
      return false;
    }
 else     if (CompatibilityHandler.getInstance().isRightClickHandled(heldItem.getItem())) {
      return CompatibilityHandler.getInstance().handleRightClick(world,pos,this,crop,player,heldItem);
    }
 else {
      this.harvest(world,pos,state,player,crop);
      if (CropPlantHandler.isValidSeed(heldItem)) {
        if (this.plantSeed(heldItem,world,pos)) {
          heldItem.stackSize=heldItem.stackSize - (player.capabilities.isCreativeMode ? 0 : 1);
        }
      }
    }
  }
  return true;
}

Fixed version (ground truth):
/** 
 * Handles right-clicks from the player. Allows the player to 'use' the block. TODO: Clean up this horrible mess of a method.
 * @return if the right-click was consumed.
 */
@Override public boolean onBlockActivated(World world,BlockPos pos,IBlockState state,EntityPlayer player,EnumHand hand,ItemStack heldItem,EnumFacing side,float hitX,float hitY,float hitZ){
  if (world.isRemote) {
    return true;
  }
  TileEntity te=world.getTileEntity(pos);
  if (te instanceof TileEntityCrop) {
    TileEntityCrop crop=(TileEntityCrop)te;
    if (AgriCraftItems.enableHandRake && crop.hasWeed() && heldItem == null) {
      return false;
    }
 else     if (player.isSneaking() || heldItem == null || heldItem.getItem() == null) {
      this.harvest(world,pos,state,player,crop);
    }
 else     if (heldItem.getItem() instanceof IRake || heldItem.getItem() instanceof IClipper || heldItem.getItem() instanceof ItemDebugger) {
      return false;
    }
 else     if (heldItem.getItem() instanceof ItemAgriCraftSeed && !crop.isCrossCrop() && !crop.hasWeed()) {
      IAgriPlant plant=CropPlantHandler.getPlantFromStack(heldItem);
      if (plant != null && plant.getGrowthRequirement().canGrow(world,pos)) {
        crop.setStat(new PlantStats());
        crop.setPlant(plant);
        if (!player.capabilities.isCreativeMode) {
          heldItem.stackSize--;
        }
      }
    }
 else     if (heldItem.getItem() == AgriCraftItems.crops) {
      this.setCrossCrop(world,pos,state,player,heldItem);
    }
 else     if (heldItem.getItem() instanceof ITrowel) {
      crop.onTrowelUsed((ITrowel)heldItem.getItem(),heldItem);
    }
 else     if (heldItem.getItem() == net.minecraft.init.Items.dye && heldItem.getItemDamage() == 15) {
      return !crop.canBonemeal();
    }
 else     if (heldItem.getItem() instanceof IAgriFertilizer) {
      IAgriFertilizer fertilizer=(IAgriFertilizer)heldItem.getItem();
      if (crop.acceptsFertilizer(fertilizer)) {
        crop.applyFertilizer(fertilizer,world.rand);
        NetworkWrapper.getInstance().sendToAllAround(new MessageFertilizerApplied(heldItem,pos),new NetworkRegistry.TargetPoint(world.provider.getDimension(),pos.getX(),pos.getY(),pos.getZ(),32));
        if (!player.capabilities.isCreativeMode) {
          heldItem.stackSize=heldItem.stackSize - 1;
        }
      }
      return false;
    }
 else     if (CompatibilityHandler.getInstance().isRightClickHandled(heldItem.getItem())) {
      return CompatibilityHandler.getInstance().handleRightClick(world,pos,this,crop,player,heldItem);
    }
 else {
      this.harvest(world,pos,state,player,crop);
      if (CropPlantHandler.isValidSeed(heldItem)) {
        if (this.plantSeed(heldItem,world,pos)) {
          heldItem.stackSize=heldItem.stackSize - (player.capabilities.isCreativeMode ? 0 : 1);
        }
      }
    }
  }
  return true;
}