Program: 96712
Project: 96712
Buggy source:
@Override public void handle(GlowSession session,BlockPlacementMessage message){
  final GlowPlayer player=session.getPlayer();
  if (player == null) {
    return;
  }
  Action action=Action.RIGHT_CLICK_BLOCK;
  GlowBlock clicked=player.getWorld().getBlockAt(message.getX(),message.getY(),message.getZ());
  org.dragonet.DragonetServer.instance().getRhino().useItem(message.getX(),message.getY(),message.getZ(),"String_Node_Str",player.getWorld().getBlockAt(message.getX(),message.getY(),message.getZ()).getType().name(),player);
  if (message.getDirection() == -1) {
    BlockPlacementMessage previous=session.getPreviousPlacement();
    if (previous == null || !previous.getHeldItem().equals(message.getHeldItem())) {
      action=Action.RIGHT_CLICK_AIR;
      clicked=null;
    }
 else {
      session.setPreviousPlacement(null);
      return;
    }
  }
  session.setPreviousPlacement(message);
  Vector clickedLoc=new Vector(message.getCursorX(),message.getCursorY(),message.getCursorZ());
  BlockFace face=convertFace(message.getDirection());
  ItemStack holding=player.getItemInHand();
  if (!Objects.equals(holding,message.getHeldItem())) {
    return;
  }
  if (clicked != null && clicked.getType() == Material.AIR) {
    player.sendBlockChange(clicked.getLocation(),Material.AIR,(byte)0);
    return;
  }
  PlayerInteractEvent event=EventFactory.onPlayerInteract(player,action,clicked,face);
  boolean useInteractedBlock=event.useInteractedBlock() != Event.Result.DENY;
  if (useInteractedBlock && clicked != null && (!player.isSneaking() || holding == null)) {
    BlockType blockType=ItemTable.instance().getBlock(clicked.getType());
    useInteractedBlock=blockType.blockInteract(player,clicked,face,clickedLoc);
  }
 else {
    useInteractedBlock=false;
  }
  if (selectResult(event.useItemInHand(),!useInteractedBlock) && holding != null) {
    ItemType type=ItemTable.instance().getItem(holding.getType());
    if (clicked == null) {
      type.rightClickAir(player,holding);
    }
 else {
      type.rightClickBlock(player,clicked,face,holding,clickedLoc);
    }
  }
  if (clicked != null) {
    revert(player,clicked);
    revert(player,clicked.getRelative(face));
  }
  if (holding != null) {
    if (holding.getType().getMaxDurability() > 0 && holding.getDurability() > holding.getType().getMaxDurability()) {
      holding.setAmount(holding.getAmount() - 1);
      holding.setDurability((short)0);
    }
    if (holding.getAmount() <= 0) {
      holding=null;
    }
  }
  player.setItemInHand(holding);
}

Fixed version (ground truth):
@Override public void handle(GlowSession session,BlockPlacementMessage message){
  final GlowPlayer player=session.getPlayer();
  if (player == null) {
    return;
  }
  Action action=Action.RIGHT_CLICK_BLOCK;
  GlowBlock clicked=player.getWorld().getBlockAt(message.getX(),message.getY(),message.getZ());
  if (message.getDirection() == -1) {
    BlockPlacementMessage previous=session.getPreviousPlacement();
    if (previous == null || !previous.getHeldItem().equals(message.getHeldItem())) {
      action=Action.RIGHT_CLICK_AIR;
      clicked=null;
    }
 else {
      session.setPreviousPlacement(null);
      return;
    }
  }
  session.setPreviousPlacement(message);
  Vector clickedLoc=new Vector(message.getCursorX(),message.getCursorY(),message.getCursorZ());
  BlockFace face=convertFace(message.getDirection());
  ItemStack holding=player.getItemInHand();
  if (!Objects.equals(holding,message.getHeldItem())) {
    return;
  }
  if (clicked != null && clicked.getType() == Material.AIR) {
    player.sendBlockChange(clicked.getLocation(),Material.AIR,(byte)0);
    return;
  }
  PlayerInteractEvent event=EventFactory.onPlayerInteract(player,action,clicked,face);
  boolean useInteractedBlock=event.useInteractedBlock() != Event.Result.DENY;
  if (useInteractedBlock && clicked != null && (!player.isSneaking() || holding == null)) {
    BlockType blockType=ItemTable.instance().getBlock(clicked.getType());
    useInteractedBlock=blockType.blockInteract(player,clicked,face,clickedLoc);
  }
 else {
    useInteractedBlock=false;
  }
  if (selectResult(event.useItemInHand(),!useInteractedBlock) && holding != null) {
    ItemType type=ItemTable.instance().getItem(holding.getType());
    if (clicked == null) {
      type.rightClickAir(player,holding);
    }
 else {
      type.rightClickBlock(player,clicked,face,holding,clickedLoc);
    }
  }
  if (clicked != null) {
    revert(player,clicked);
    revert(player,clicked.getRelative(face));
  }
  if (holding != null) {
    if (holding.getType().getMaxDurability() > 0 && holding.getDurability() > holding.getType().getMaxDurability()) {
      holding.setAmount(holding.getAmount() - 1);
      holding.setDurability((short)0);
    }
    if (holding.getAmount() <= 0) {
      holding=null;
    }
  }
  player.setItemInHand(holding);
}