Program: 165709
Project: 165709
Buggy source:
@SubscribeEvent public void onPlayerInteractEvent(PlayerInteractEvent event){
  EntityPlayer player=event.getEntityPlayer();
  if (event instanceof PlayerInteractEvent.LeftClickBlock) {
    checkCreativeClick(event);
  }
 else   if (event instanceof PlayerInteractEvent.RightClickBlock) {
    if (player.isSneaking()) {
      ItemStack heldItem=player.getHeldItemMainhand();
      if (ItemStackTools.isEmpty(heldItem) || !(heldItem.getItem() instanceof SmartWrench)) {
        World world=event.getWorld();
        IBlockState state=world.getBlockState(event.getPos());
        Block block=state.getBlock();
        if (block instanceof ScreenBlock) {
          Vec3d vec=((PlayerInteractEvent.RightClickBlock)event).getHitVec();
          ((ScreenBlock)block).activate(world,event.getPos(),state,player,event.getHand(),event.getFace(),(float)vec.xCoord,(float)vec.yCoord,(float)vec.zCoord);
          ((PlayerInteractEvent.RightClickBlock)event).setUseItem(Event.Result.DENY);
          return;
        }
 else         if (block instanceof ScreenHitBlock) {
          Vec3d vec=((PlayerInteractEvent.RightClickBlock)event).getHitVec();
          ((ScreenHitBlock)block).activate(world,event.getPos(),state,player,event.getHand(),event.getFace(),(float)vec.xCoord,(float)vec.yCoord,(float)vec.zCoord);
          ((PlayerInteractEvent.RightClickBlock)event).setUseItem(Event.Result.DENY);
          return;
        }
      }
    }
  }
  ItemStack heldItem=player.getHeldItem(event.getHand());
  if (ItemStackTools.isEmpty(heldItem) || heldItem.getItem() == null) {
    return;
  }
  if (player.isSneaking() && WrenchChecker.isAWrench(heldItem.getItem())) {
    if (heldItem.getItem() instanceof SmartWrenchItem) {
      if (SmartWrenchItem.getCurrentMode(heldItem) == SmartWrenchMode.MODE_SELECT) {
        return;
      }
    }
    World world=event.getWorld();
    int x=event.getPos().getX();
    int y=event.getPos().getY();
    int z=event.getPos().getZ();
    Collection<GlobalCoordinate> protectors=BlockProtectors.getProtectors(world,x,y,z);
    if (BlockProtectors.checkHarvestProtection(x,y,z,world,protectors)) {
      event.setCanceled(true);
    }
  }
}

Fixed version (ground truth):
@SubscribeEvent public void onPlayerInteractEvent(PlayerInteractEvent event){
  EntityPlayer player=event.getEntityPlayer();
  if (event instanceof PlayerInteractEvent.LeftClickBlock) {
    checkCreativeClick(event);
  }
 else   if (event instanceof PlayerInteractEvent.RightClickBlock) {
    if (player.isSneaking()) {
      ItemStack heldItem=player.getHeldItemMainhand();
      if (ItemStackTools.isEmpty(heldItem) || !(heldItem.getItem() instanceof SmartWrench)) {
        World world=event.getWorld();
        IBlockState state=world.getBlockState(event.getPos());
        Block block=state.getBlock();
        if (block instanceof ScreenBlock) {
          Vec3d vec=((PlayerInteractEvent.RightClickBlock)event).getHitVec();
          ((ScreenBlock)block).activate(world,event.getPos(),state,player,event.getHand(),event.getFace(),(float)vec.x,(float)vec.y,(float)vec.z);
          ((PlayerInteractEvent.RightClickBlock)event).setUseItem(Event.Result.DENY);
          return;
        }
 else         if (block instanceof ScreenHitBlock) {
          Vec3d vec=((PlayerInteractEvent.RightClickBlock)event).getHitVec();
          ((ScreenHitBlock)block).activate(world,event.getPos(),state,player,event.getHand(),event.getFace(),(float)vec.x,(float)vec.y,(float)vec.z);
          ((PlayerInteractEvent.RightClickBlock)event).setUseItem(Event.Result.DENY);
          return;
        }
      }
    }
  }
  ItemStack heldItem=player.getHeldItem(event.getHand());
  if (ItemStackTools.isEmpty(heldItem) || heldItem.getItem() == null) {
    return;
  }
  if (player.isSneaking() && WrenchChecker.isAWrench(heldItem.getItem())) {
    if (heldItem.getItem() instanceof SmartWrenchItem) {
      if (SmartWrenchItem.getCurrentMode(heldItem) == SmartWrenchMode.MODE_SELECT) {
        return;
      }
    }
    World world=event.getWorld();
    int x=event.getPos().getX();
    int y=event.getPos().getY();
    int z=event.getPos().getZ();
    Collection<GlobalCoordinate> protectors=BlockProtectors.getProtectors(world,x,y,z);
    if (BlockProtectors.checkHarvestProtection(x,y,z,world,protectors)) {
      event.setCanceled(true);
    }
  }
}