Program: 79969
Project: 79969
Buggy source:
@SuppressWarnings("String_Node_Str") @EventHandler(priority=EventPriority.NORMAL) public void onRightClick(ItemUseEvent e){
  if (e.getParentEvent() != null && !e.getParentEvent().getHand().equals(EquipmentSlot.HAND)) {
    return;
  }
  final Player p=e.getPlayer();
  ItemStack item=e.getItem();
  if (SlimefunManager.isItemSimiliar(item,SlimefunGuide.getItem(true),true)) {
    if (p.isSneaking())     SlimefunGuide.openSettings(p,item);
 else     SlimefunGuide.openGuide(p,true);
  }
 else   if (SlimefunManager.isItemSimiliar(item,SlimefunGuide.getItem(false),true)) {
    if (p.isSneaking())     SlimefunGuide.openSettings(p,item);
 else     SlimefunGuide.openGuide(p,false);
  }
 else   if (SlimefunManager.isItemSimiliar(e.getPlayer().getInventory().getItemInMainHand(),SlimefunItems.DEBUG_FISH,true) || SlimefunManager.isItemSimiliar(e.getPlayer().getInventory().getItemInOffHand(),SlimefunItems.DEBUG_FISH,true)) {
  }
 else   if (Slimefun.hasUnlocked(p,item,true)) {
    for (    ItemHandler handler : SlimefunItem.getHandlers("String_Node_Str")) {
      if (((ItemInteractionHandler)handler).onRightClick(e,p,item))       return;
    }
    if (SlimefunManager.isItemSimiliar(item,SlimefunItems.DURALUMIN_MULTI_TOOL,false) || SlimefunManager.isItemSimiliar(item,SlimefunItems.SOLDER_MULTI_TOOL,false) || SlimefunManager.isItemSimiliar(item,SlimefunItems.BILLON_MULTI_TOOL,false)|| SlimefunManager.isItemSimiliar(item,SlimefunItems.STEEL_MULTI_TOOL,false)|| SlimefunManager.isItemSimiliar(item,SlimefunItems.DAMASCUS_STEEL_MULTI_TOOL,false)|| SlimefunManager.isItemSimiliar(item,SlimefunItems.REINFORCED_ALLOY_MULTI_TOOL,false)|| SlimefunManager.isItemSimiliar(item,SlimefunItems.CARBONADO_MULTI_TOOL,false)) {
      e.setCancelled(true);
      ItemStack tool=null;
      for (      ItemStack mTool : new ItemStack[]{SlimefunItems.DURALUMIN_MULTI_TOOL,SlimefunItems.SOLDER_MULTI_TOOL,SlimefunItems.BILLON_MULTI_TOOL,SlimefunItems.STEEL_MULTI_TOOL,SlimefunItems.DAMASCUS_STEEL_MULTI_TOOL,SlimefunItems.REINFORCED_ALLOY_MULTI_TOOL,SlimefunItems.CARBONADO_MULTI_TOOL}) {
        if (mTool.getItemMeta().getLore().get(0).equalsIgnoreCase(item.getItemMeta().getLore().get(0))) {
          tool=mTool;
          break;
        }
      }
      if (tool != null) {
        List<Integer> modes=((MultiTool)SlimefunItem.getByItem(tool)).getModes();
        int index=0;
        if (Variables.mode.containsKey(p.getUniqueId()))         index=Variables.mode.get(p.getUniqueId());
        if (!p.isSneaking()) {
          float charge=ItemEnergy.getStoredEnergy(item);
          float cost=0.3F;
          if (charge >= cost) {
            p.setItemInHand(ItemEnergy.chargeItem(item,-cost));
            Bukkit.getPluginManager().callEvent(new ItemUseEvent(e.getParentEvent(),SlimefunItem.getByName((String)Slimefun.getItemValue(SlimefunItem.getByItem(tool).getName(),"String_Node_Str" + modes.get(index) + "String_Node_Str")).getItem(),e.getClickedBlock()));
          }
        }
 else {
          index++;
          if (index == modes.size())           index=0;
          Messages.local.sendTranslation(p,"String_Node_Str",true,new Variable("String_Node_Str","String_Node_Str"),new Variable("String_Node_Str",(String)Slimefun.getItemValue(SlimefunItem.getByItem(tool).getName(),"String_Node_Str" + modes.get(index) + "String_Node_Str")));
          Variables.mode.put(p.getUniqueId(),index);
        }
      }
    }
 else     if (SlimefunManager.isItemSimiliar(item,SlimefunItems.HEAVY_CREAM,true))     e.setCancelled(true);
    if (e.getClickedBlock() != null && BlockStorage.hasBlockInfo(e.getClickedBlock())) {
      String id=BlockStorage.checkID(e.getClickedBlock());
      if (BlockMenuPreset.isInventory(id)) {
        if (SlimefunManager.isItemSimiliar(item,SlimefunItems.CARGO_INPUT,true))         ;
 else         if (SlimefunManager.isItemSimiliar(item,SlimefunItems.CARGO_OUTPUT,true))         ;
 else         if (SlimefunManager.isItemSimiliar(item,SlimefunItems.CARGO_OUTPUT_ADVANCED,true))         ;
 else         if (SlimefunManager.isItemSimiliar(item,SlimefunItems.CT_IMPORT_BUS,true))         ;
 else         if (SlimefunManager.isItemSimiliar(item,SlimefunItems.CT_EXPORT_BUS,true))         ;
 else {
          e.setCancelled(true);
          BlockStorage storage=BlockStorage.getStorage(e.getClickedBlock().getWorld());
          if (storage.hasUniversalInventory(id)) {
            UniversalBlockMenu menu=storage.getUniversalInventory(id);
            if (menu.canOpen(e.getClickedBlock(),p))             menu.open(p);
          }
 else           if (storage.hasInventory(e.getClickedBlock().getLocation())) {
            BlockMenu menu=BlockStorage.getInventory(e.getClickedBlock().getLocation());
            if (menu.canOpen(e.getClickedBlock(),p))             menu.open(p);
          }
        }
      }
    }
  }
 else   e.setCancelled(true);
}

Fixed version (ground truth):
@SuppressWarnings("String_Node_Str") @EventHandler(priority=EventPriority.NORMAL) public void onRightClick(ItemUseEvent e){
  if (e.getParentEvent() != null && !e.getParentEvent().getHand().equals(EquipmentSlot.HAND)) {
    return;
  }
  final Player p=e.getPlayer();
  ItemStack item=e.getItem();
  if (SlimefunManager.isItemSimiliar(item,SlimefunGuide.getItem(true),true)) {
    if (p.isSneaking())     SlimefunGuide.openSettings(p,item);
 else     SlimefunGuide.openGuide(p,true);
  }
 else   if (SlimefunManager.isItemSimiliar(item,SlimefunGuide.getItem(false),true)) {
    if (p.isSneaking())     SlimefunGuide.openSettings(p,item);
 else     SlimefunGuide.openGuide(p,false);
  }
 else   if (SlimefunManager.isItemSimiliar(e.getPlayer().getInventory().getItemInMainHand(),SlimefunItems.DEBUG_FISH,true) || SlimefunManager.isItemSimiliar(e.getPlayer().getInventory().getItemInOffHand(),SlimefunItems.DEBUG_FISH,true)) {
  }
 else   if (Slimefun.hasUnlocked(p,item,true)) {
    for (    ItemHandler handler : SlimefunItem.getHandlers("String_Node_Str")) {
      if (((ItemInteractionHandler)handler).onRightClick(e,p,item))       return;
    }
    if (SlimefunManager.isItemSimiliar(item,SlimefunItems.DURALUMIN_MULTI_TOOL,false) || SlimefunManager.isItemSimiliar(item,SlimefunItems.SOLDER_MULTI_TOOL,false) || SlimefunManager.isItemSimiliar(item,SlimefunItems.BILLON_MULTI_TOOL,false)|| SlimefunManager.isItemSimiliar(item,SlimefunItems.STEEL_MULTI_TOOL,false)|| SlimefunManager.isItemSimiliar(item,SlimefunItems.DAMASCUS_STEEL_MULTI_TOOL,false)|| SlimefunManager.isItemSimiliar(item,SlimefunItems.REINFORCED_ALLOY_MULTI_TOOL,false)|| SlimefunManager.isItemSimiliar(item,SlimefunItems.CARBONADO_MULTI_TOOL,false)) {
      e.setCancelled(true);
      ItemStack tool=null;
      for (      ItemStack mTool : new ItemStack[]{SlimefunItems.DURALUMIN_MULTI_TOOL,SlimefunItems.SOLDER_MULTI_TOOL,SlimefunItems.BILLON_MULTI_TOOL,SlimefunItems.STEEL_MULTI_TOOL,SlimefunItems.DAMASCUS_STEEL_MULTI_TOOL,SlimefunItems.REINFORCED_ALLOY_MULTI_TOOL,SlimefunItems.CARBONADO_MULTI_TOOL}) {
        if (mTool.getItemMeta().getLore().get(0).equalsIgnoreCase(item.getItemMeta().getLore().get(0))) {
          tool=mTool;
          break;
        }
      }
      if (tool != null) {
        List<Integer> modes=((MultiTool)SlimefunItem.getByItem(tool)).getModes();
        int index=0;
        if (Variables.mode.containsKey(p.getUniqueId()))         index=Variables.mode.get(p.getUniqueId());
        if (!p.isSneaking()) {
          float charge=ItemEnergy.getStoredEnergy(item);
          float cost=0.3F;
          if (charge >= cost) {
            p.setItemInHand(ItemEnergy.chargeItem(item,-cost));
            Bukkit.getPluginManager().callEvent(new ItemUseEvent(e.getParentEvent(),SlimefunItem.getByName((String)Slimefun.getItemValue(SlimefunItem.getByItem(tool).getName(),"String_Node_Str" + modes.get(index) + "String_Node_Str")).getItem(),e.getClickedBlock()));
          }
        }
 else {
          index++;
          if (index == modes.size())           index=0;
          Messages.local.sendTranslation(p,"String_Node_Str",true,new Variable("String_Node_Str","String_Node_Str"),new Variable("String_Node_Str",(String)Slimefun.getItemValue(SlimefunItem.getByItem(tool).getName(),"String_Node_Str" + modes.get(index) + "String_Node_Str")));
          Variables.mode.put(p.getUniqueId(),index);
        }
      }
    }
 else     if (SlimefunManager.isItemSimiliar(item,SlimefunItems.HEAVY_CREAM,true))     e.setCancelled(true);
    if (e.getClickedBlock() != null && BlockStorage.hasBlockInfo(e.getClickedBlock())) {
      String id=BlockStorage.checkID(e.getClickedBlock());
      if (BlockMenuPreset.isInventory(id)) {
        if (p.isSneaking() && SlimefunManager.isItemSimiliar(item,SlimefunItems.CARGO_INPUT,true))         ;
 else         if (p.isSneaking() && SlimefunManager.isItemSimiliar(item,SlimefunItems.CARGO_OUTPUT,true))         ;
 else         if (p.isSneaking() && SlimefunManager.isItemSimiliar(item,SlimefunItems.CARGO_OUTPUT_ADVANCED,true))         ;
 else         if (p.isSneaking() && SlimefunManager.isItemSimiliar(item,SlimefunItems.CT_IMPORT_BUS,true))         ;
 else         if (p.isSneaking() && SlimefunManager.isItemSimiliar(item,SlimefunItems.CT_EXPORT_BUS,true))         ;
 else {
          e.setCancelled(true);
          BlockStorage storage=BlockStorage.getStorage(e.getClickedBlock().getWorld());
          if (storage.hasUniversalInventory(id)) {
            UniversalBlockMenu menu=storage.getUniversalInventory(id);
            if (menu.canOpen(e.getClickedBlock(),p))             menu.open(p);
          }
 else           if (storage.hasInventory(e.getClickedBlock().getLocation())) {
            BlockMenu menu=BlockStorage.getInventory(e.getClickedBlock().getLocation());
            if (menu.canOpen(e.getClickedBlock(),p))             menu.open(p);
          }
        }
      }
    }
  }
 else   e.setCancelled(true);
}