Program: 79970
Project: 79970
Buggy source:
@EventHandler public void onEat(PlayerItemConsumeEvent e){
  if (e.getItem() != null) {
    final Player p=e.getPlayer();
    ItemStack item=e.getItem();
    if (Slimefun.hasUnlocked(p,item,true)) {
      if (SlimefunManager.isItemSimiliar(item,SlimefunItems.MONSTER_JERKY,true)) {
        PlayerInventory.consumeItemInHand(p);
        e.setItem(new ItemStack(Material.APPLE));
      }
 else       if (SlimefunManager.isItemSimiliar(item,SlimefunItems.FORTUNE_COOKIE,true))       p.sendMessage(ChatColor.translateAlternateColors('&',Messages.local.getTranslation("String_Node_Str").get(CSCoreLib.randomizer().nextInt(Messages.local.getTranslation("String_Node_Str").size()))));
 else       if (SlimefunManager.isItemSimiliar(item,SlimefunItems.BEEF_JERKY,true))       p.setSaturation((Integer)Slimefun.getItemValue("String_Node_Str","String_Node_Str"));
 else       if (SlimefunManager.isItemSimiliar(item,SlimefunItems.MEDICINE,true)) {
        if (p.hasPotionEffect(PotionEffectType.POISON))         p.removePotionEffect(PotionEffectType.POISON);
        if (p.hasPotionEffect(PotionEffectType.WITHER))         p.removePotionEffect(PotionEffectType.WITHER);
        if (p.hasPotionEffect(PotionEffectType.SLOW))         p.removePotionEffect(PotionEffectType.SLOW);
        if (p.hasPotionEffect(PotionEffectType.SLOW_DIGGING))         p.removePotionEffect(PotionEffectType.SLOW_DIGGING);
        if (p.hasPotionEffect(PotionEffectType.WEAKNESS))         p.removePotionEffect(PotionEffectType.WEAKNESS);
        if (p.hasPotionEffect(PotionEffectType.CONFUSION))         p.removePotionEffect(PotionEffectType.CONFUSION);
        if (p.hasPotionEffect(PotionEffectType.BLINDNESS))         p.removePotionEffect(PotionEffectType.BLINDNESS);
        p.setFireTicks(0);
      }
 else       if (item.getType() == Material.POTION) {
        SlimefunItem sfItem=SlimefunItem.getByItem(item);
        if (sfItem != null && sfItem instanceof Juice) {
          Bukkit.getScheduler().scheduleSyncDelayedTask(SlimefunStartup.instance,new Runnable(){
            @Override public void run(){
              p.getInventory().removeItem(new ItemStack(Material.GLASS_BOTTLE,1));
            }
          }
,1L);
        }
      }
    }
 else     e.setCancelled(true);
  }
}

Fixed version (ground truth):
@EventHandler public void onEat(PlayerItemConsumeEvent e){
  if (e.getItem() != null) {
    final Player p=e.getPlayer();
    ItemStack item=e.getItem();
    if (Slimefun.hasUnlocked(p,item,true)) {
      if (SlimefunManager.isItemSimiliar(item,SlimefunItems.MONSTER_JERKY,true)) {
        PlayerInventory.consumeItemInHand(p);
        e.setItem(new ItemStack(Material.APPLE));
      }
 else       if (SlimefunManager.isItemSimiliar(item,SlimefunItems.FORTUNE_COOKIE,true))       p.sendMessage(ChatColor.translateAlternateColorCodes('&',Messages.local.getTranslation("String_Node_Str").get(CSCoreLib.randomizer().nextInt(Messages.local.getTranslation("String_Node_Str").size()))));
 else       if (SlimefunManager.isItemSimiliar(item,SlimefunItems.BEEF_JERKY,true))       p.setSaturation((Integer)Slimefun.getItemValue("String_Node_Str","String_Node_Str"));
 else       if (SlimefunManager.isItemSimiliar(item,SlimefunItems.MEDICINE,true)) {
        if (p.hasPotionEffect(PotionEffectType.POISON))         p.removePotionEffect(PotionEffectType.POISON);
        if (p.hasPotionEffect(PotionEffectType.WITHER))         p.removePotionEffect(PotionEffectType.WITHER);
        if (p.hasPotionEffect(PotionEffectType.SLOW))         p.removePotionEffect(PotionEffectType.SLOW);
        if (p.hasPotionEffect(PotionEffectType.SLOW_DIGGING))         p.removePotionEffect(PotionEffectType.SLOW_DIGGING);
        if (p.hasPotionEffect(PotionEffectType.WEAKNESS))         p.removePotionEffect(PotionEffectType.WEAKNESS);
        if (p.hasPotionEffect(PotionEffectType.CONFUSION))         p.removePotionEffect(PotionEffectType.CONFUSION);
        if (p.hasPotionEffect(PotionEffectType.BLINDNESS))         p.removePotionEffect(PotionEffectType.BLINDNESS);
        p.setFireTicks(0);
      }
 else       if (item.getType() == Material.POTION) {
        SlimefunItem sfItem=SlimefunItem.getByItem(item);
        if (sfItem != null && sfItem instanceof Juice) {
          Bukkit.getScheduler().scheduleSyncDelayedTask(SlimefunStartup.instance,new Runnable(){
            @Override public void run(){
              p.getInventory().removeItem(new ItemStack(Material.GLASS_BOTTLE,1));
            }
          }
,1L);
        }
      }
    }
 else     e.setCancelled(true);
  }
}