Program: 95784
Project: 95784
Buggy source:
@SubscribeEvent(priority=EventPriority.HIGHEST) public void onPlayerUseItemEvent(PlayerInteractEvent event){
  if (event.action == PlayerInteractEvent.Action.RIGHT_CLICK_BLOCK) {
    if (event.entityPlayer.getCurrentEquippedItem() != null && event.entityPlayer.getCurrentEquippedItem().stackSize > 0 && event.entityPlayer.getCurrentEquippedItem().getItem() != null && event.entityPlayer.getCurrentEquippedItem().getItem() instanceof IPlantable && event.entityPlayer.getCurrentEquippedItem().hasTagCompound()) {
      NBTTagCompound tag=event.entityPlayer.getCurrentEquippedItem().getTagCompound();
      if (tag.hasKey(Names.growth) && tag.hasKey(Names.gain) && tag.hasKey(Names.strength)) {
        if (event.world.getTileEntity(event.x,event.y,event.z) != null && event.world.getTileEntity(event.x,event.y,event.z) instanceof TileEntityCrop) {
          TileEntityCrop crop=(TileEntityCrop)event.world.getTileEntity(event.x,event.y,event.z);
          if (!(crop.hasPlant() || crop.crossCrop)) {
            event.setResult(Event.Result.ALLOW);
          }
 else {
            event.setResult(Event.Result.DENY);
            event.setCanceled(true);
          }
        }
 else {
          event.setResult(Event.Result.DENY);
          event.setCanceled(true);
        }
      }
    }
 else     if (LoadedMods.hungerOverhaul) {
      if (event.world.getBlock(event.x,event.y,event.z) instanceof BlockCrop) {
        if (event.entityPlayer.getCurrentEquippedItem() != null) {
          if (event.entityPlayer.getCurrentEquippedItem().getItem() == Items.dye && event.entityPlayer.getCurrentEquippedItem().getItemDamage() == 15) {
            if (!((TileEntityCrop)event.world.getTileEntity(event.x,event.y,event.z)).isMature()) {
              if (!event.world.isRemote) {
                event.setResult(Event.Result.ALLOW);
                return;
              }
            }
          }
 else           if (event.entityPlayer.getCurrentEquippedItem().getItem() instanceof ItemDebugger) {
            event.entityPlayer.getCurrentEquippedItem().getItem().onItemUse(event.entityPlayer.getCurrentEquippedItem(),event.entityPlayer,event.world,event.x,event.y,event.z,event.face,0,0,0);
          }
        }
        event.world.getBlock(event.x,event.y,event.z).onBlockActivated(event.world,event.x,event.y,event.z,event.entityPlayer,event.face,0,0,0);
        event.setResult(Event.Result.DENY);
        event.useItem=Event.Result.DENY;
        event.useBlock=Event.Result.DENY;
        if (event.world.isRemote) {
          FMLClientHandler.instance().getClientPlayerEntity().sendQueue.addToSendQueue(new C08PacketPlayerBlockPlacement(event.x,event.y,event.z,event.face,event.entityPlayer.inventory.getCurrentItem(),0f,0f,0f));
        }
        event.setCanceled(true);
      }
    }
  }
}

Fixed version (ground truth):
@SubscribeEvent(priority=EventPriority.HIGHEST) public void onPlayerUseItemEvent(PlayerInteractEvent event){
  if (event.action == PlayerInteractEvent.Action.RIGHT_CLICK_BLOCK) {
    if (event.world.getBlock(event.x,event.y,event.z) == Blocks.farmland) {
      if (event.entityPlayer.getCurrentEquippedItem() != null && event.entityPlayer.getCurrentEquippedItem().stackSize > 0 && event.entityPlayer.getCurrentEquippedItem().getItem() != null && event.entityPlayer.getCurrentEquippedItem().getItem() instanceof IPlantable && event.entityPlayer.getCurrentEquippedItem().hasTagCompound()) {
        if (ConfigurationHandler.disableVanillaFarming && SeedHelper.isValidSeed((ItemSeeds)event.entityPlayer.getCurrentEquippedItem().getItem())) {
          event.setResult(Event.Result.DENY);
          event.setCanceled(true);
        }
 else {
          NBTTagCompound tag=event.entityPlayer.getCurrentEquippedItem().getTagCompound();
          if (tag.hasKey(Names.growth) && tag.hasKey(Names.gain) && tag.hasKey(Names.strength)) {
            event.setResult(Event.Result.DENY);
            event.setCanceled(true);
          }
        }
      }
    }
 else     if (event.world.getBlock(event.x,event.y,event.z) instanceof BlockCrop) {
      if (LoadedMods.hungerOverhaul) {
        if (event.entityPlayer.getCurrentEquippedItem() != null) {
          if (event.entityPlayer.getCurrentEquippedItem().getItem() == Items.dye && event.entityPlayer.getCurrentEquippedItem().getItemDamage() == 15) {
            if (!((TileEntityCrop)event.world.getTileEntity(event.x,event.y,event.z)).isMature()) {
              if (!event.world.isRemote) {
                event.setResult(Event.Result.ALLOW);
                return;
              }
            }
          }
 else           if (event.entityPlayer.getCurrentEquippedItem().getItem() instanceof ItemDebugger) {
            event.entityPlayer.getCurrentEquippedItem().getItem().onItemUse(event.entityPlayer.getCurrentEquippedItem(),event.entityPlayer,event.world,event.x,event.y,event.z,event.face,0,0,0);
          }
        }
        event.world.getBlock(event.x,event.y,event.z).onBlockActivated(event.world,event.x,event.y,event.z,event.entityPlayer,event.face,0,0,0);
        event.setResult(Event.Result.DENY);
        event.useItem=Event.Result.DENY;
        event.useBlock=Event.Result.DENY;
        if (event.world.isRemote) {
          FMLClientHandler.instance().getClientPlayerEntity().sendQueue.addToSendQueue(new C08PacketPlayerBlockPlacement(event.x,event.y,event.z,event.face,event.entityPlayer.inventory.getCurrentItem(),0f,0f,0f));
        }
        event.setCanceled(true);
      }
    }
  }
}