Program: 179093
Project: 179093
Buggy source:
public void Item(String[] args,User user){
  if (args.length == 0 || args.length > 3) {
    user.sendMessage(ChatColor.YELLOW + "String_Node_Str");
    return;
  }
  BCItem Item;
  if ((Item=back.checkAlias(args[0])) == null) {
    user.sendMessage(ChatColor.RED + "String_Node_Str");
    return;
  }
  int Amount=1;
  if (args.length >= 2) {
    try {
      Amount=Integer.parseInt(args[1]);
    }
 catch (    NumberFormatException e) {
      user.sendMessage(ChatColor.RED + "String_Node_Str");
      return;
    }
  }
  int fullAmount=Amount;
  List<Integer> splitamount=new ArrayList<Integer>();
  while (Amount > 0) {
    Integer maxAmount=back.getStackNumber(Item.getMaterial().getId());
    if (Amount > maxAmount) {
      splitamount.add(maxAmount);
      Amount-=maxAmount;
    }
 else {
      splitamount.add(Amount);
      Amount=0;
    }
  }
  Material mat=Item.getMaterial();
  int ItemDamage=Item.getDamage();
  if (args.length == 3) {
    User user2;
    if ((user2=User.matchUser(args[2],plugin)) == null) {
      user.sendMessage("String_Node_Str" + args[2] + "String_Node_Str");
      return;
    }
    for (    Integer amount : splitamount) {
      if (user2.getHandle().getInventory().firstEmpty() >= 0) {
        user2.getHandle().getInventory().addItem(new ItemStack(mat,amount,(short)ItemDamage));
      }
 else {
        user2.getHandle().getWorld().dropItem(user2.getHandle().getLocation(),new ItemStack(mat,amount,(short)ItemDamage));
      }
    }
    user2.sendMessage(ChatColor.GREEN + user.getDisplayName() + "String_Node_Str");
    user.sendMessage("String_Node_Str");
    log.info("String_Node_Str" + user.getDisplayName() + "String_Node_Str"+ user2.getDisplayName()+ "String_Node_Str"+ String.valueOf(mat.getId())+ "String_Node_Str"+ String.valueOf(fullAmount)+ "String_Node_Str"+ String.valueOf(ItemDamage)+ "String_Node_Str");
  }
 else {
    if (user.isServer()) {
      user.sendMessage(ChatColor.RED + "String_Node_Str");
      return;
    }
    for (    Integer amount : splitamount) {
      if (user.getHandle().getInventory().firstEmpty() >= 0) {
        user.getHandle().getInventory().addItem(new ItemStack(mat,amount,(short)ItemDamage));
      }
 else {
        user.getHandle().getWorld().dropItem(user.getHandle().getLocation(),new ItemStack(mat,amount,(short)ItemDamage));
      }
    }
    user.sendMessage(ChatColor.GREEN + "String_Node_Str" + user.getDisplayName()+ "String_Node_Str");
    log.info("String_Node_Str" + user.getDisplayName() + "String_Node_Str"+ user.getDisplayName()+ "String_Node_Str"+ String.valueOf(mat.getId())+ "String_Node_Str"+ String.valueOf(fullAmount)+ "String_Node_Str"+ String.valueOf(ItemDamage)+ "String_Node_Str");
  }
}

Fixed version (ground truth):
public void Item(String[] args,User user){
  if (args.length == 0 || args.length > 3) {
    user.sendMessage(ChatColor.YELLOW + "String_Node_Str");
    return;
  }
  BCItem Item;
  if ((Item=back.checkAlias(args[0])) == null) {
    user.sendMessage(ChatColor.RED + "String_Node_Str");
    return;
  }
  int Amount=1;
  if (args.length >= 2) {
    try {
      Amount=Integer.parseInt(args[1]);
    }
 catch (    NumberFormatException e) {
      user.sendMessage(ChatColor.RED + "String_Node_Str");
      return;
    }
  }
  int fullAmount=Amount;
  List<Integer> splitamount=new ArrayList<Integer>();
  while (Amount > 0) {
    Integer maxAmount=back.getStackNumber(Item.getMaterial().getId());
    if (Amount > maxAmount) {
      splitamount.add(maxAmount);
      Amount-=maxAmount;
    }
 else {
      splitamount.add(Amount);
      Amount=0;
    }
  }
  Material mat=Item.getMaterial();
  int ItemDamage=Item.getDamage();
  if (args.length == 3) {
    User user2;
    if ((user2=User.matchUser(args[2],plugin)) == null) {
      user.sendMessage("String_Node_Str" + args[2] + "String_Node_Str");
      return;
    }
    for (    Integer amount : splitamount) {
      if (user2.getHandle().getInventory().firstEmpty() >= 0) {
        user2.getHandle().getInventory().addItem(new ItemStack(mat,amount,(short)ItemDamage));
      }
 else {
        user2.getHandle().getWorld().dropItem(user2.getHandle().getLocation(),new ItemStack(mat,amount,(short)ItemDamage));
      }
    }
    user2.sendMessage(ChatColor.GREEN + user.getDisplayName() + "String_Node_Str");
    user.sendMessage(ChatColor.GREEN + "String_Node_Str");
    log.info("String_Node_Str" + user.getDisplayName() + "String_Node_Str"+ user2.getDisplayName()+ "String_Node_Str"+ String.valueOf(mat.getId())+ "String_Node_Str"+ String.valueOf(fullAmount)+ "String_Node_Str"+ String.valueOf(ItemDamage)+ "String_Node_Str");
  }
 else {
    if (user.isServer()) {
      user.sendMessage(ChatColor.RED + "String_Node_Str");
      return;
    }
    for (    Integer amount : splitamount) {
      if (user.getHandle().getInventory().firstEmpty() >= 0) {
        user.getHandle().getInventory().addItem(new ItemStack(mat,amount,(short)ItemDamage));
      }
 else {
        user.getHandle().getWorld().dropItem(user.getHandle().getLocation(),new ItemStack(mat,amount,(short)ItemDamage));
      }
    }
    user.sendMessage(ChatColor.GREEN + "String_Node_Str" + user.getDisplayName()+ "String_Node_Str");
    log.info("String_Node_Str" + user.getDisplayName() + "String_Node_Str"+ user.getDisplayName()+ "String_Node_Str"+ String.valueOf(mat.getId())+ "String_Node_Str"+ String.valueOf(fullAmount)+ "String_Node_Str"+ String.valueOf(ItemDamage)+ "String_Node_Str");
  }
}