Program: 93808
Project: 93808
Buggy source:
public void onEnable(){
  ACPluginManager.setServer(getServer());
  PluginManager pm=getServer().getPluginManager();
  ACPluginListener pL=new ACPluginListener();
  PluginDescriptionFile pdfFile=this.getDescription();
  log.info("String_Node_Str" + pdfFile.getName() + "String_Node_Str"+ "String_Node_Str"+ pdfFile.getVersion()+ "String_Node_Str");
  pm.registerEvent(Event.Type.PLUGIN_ENABLE,pL,Priority.Monitor,this);
  pm.registerEvent(Event.Type.PLUGIN_DISABLE,pL,Priority.Monitor,this);
  worker=ACHelper.getInstance();
  worker.setCoreInstance(this);
  super.onEnable();
  TerminalCommandManager.getInstance().setPerm(this);
  worker.loadInfos();
  permissionLinker.registerAllPermParent();
  ACPlayerListener playerListener=new ACPlayerListener();
  ACEntityListener entityListener=new ACEntityListener();
  pm.registerEvent(Event.Type.PLAYER_INTERACT,playerListener,Priority.Normal,this);
  pm.registerEvent(Event.Type.PLAYER_JOIN,playerListener,Priority.Normal,this);
  pm.registerEvent(Event.Type.PLAYER_QUIT,playerListener,Priority.Normal,this);
  pm.registerEvent(Event.Type.PLAYER_TELEPORT,playerListener,Priority.Normal,this);
  pm.registerEvent(Event.Type.PLAYER_MOVE,playerListener,Priority.Normal,this);
  pm.registerEvent(Event.Type.PLAYER_RESPAWN,playerListener,Priority.Low,this);
  pm.registerEvent(Event.Type.PLAYER_LOGIN,playerListener,Priority.Normal,this);
  pm.registerEvent(Event.Type.PLAYER_CHAT,playerListener,Priority.Normal,this);
  pm.registerEvent(Event.Type.PLAYER_COMMAND_PREPROCESS,playerListener,Priority.Lowest,this);
  pm.registerEvent(Event.Type.PLAYER_PICKUP_ITEM,playerListener,Priority.Normal,this);
  pm.registerEvent(Event.Type.ENTITY_DAMAGE,entityListener,Priority.High,this);
  pm.registerEvent(Event.Type.ENTITY_TARGET,entityListener,Priority.High,this);
  pm.registerEvent(Event.Type.ENTITY_DEATH,entityListener,Priority.Normal,this);
  try {
    pm.registerEvent(Event.Type.FOOD_LEVEL_CHANGE,entityListener,Priority.High,this);
  }
 catch (  Throwable e) {
    if (CommandManager.getInstance().unRegisterCommand(Eternal.class,this))     CommandManager.getInstance().unRegisterCommand(Feed.class,this);
    ACLogger.info("String_Node_Str");
  }
  pm.registerEvent(Event.Type.SERVER_COMMAND,new ACServerListener(),Priority.Normal,this);
  pm.registerEvent(Event.Type.CREATURE_SPAWN,entityListener,Priority.Highest,this);
  if (worker.getConfBoolean("String_Node_Str"))   pm.registerEvent(Event.Type.SIGN_CHANGE,new ACBlockListener(),Priority.Normal,this);
  pm.registerEvent(Event.Type.WEATHER_CHANGE,new ACWeatherListener(),Priority.Normal,this);
}

Fixed version (ground truth):
public void onEnable(){
  ACPluginManager.setServer(getServer());
  PluginManager pm=getServer().getPluginManager();
  ACPluginListener pL=new ACPluginListener();
  PluginDescriptionFile pdfFile=this.getDescription();
  log.info("String_Node_Str" + pdfFile.getName() + "String_Node_Str"+ "String_Node_Str"+ pdfFile.getVersion()+ "String_Node_Str");
  pm.registerEvent(Event.Type.PLUGIN_ENABLE,pL,Priority.Monitor,this);
  pm.registerEvent(Event.Type.PLUGIN_DISABLE,pL,Priority.Monitor,this);
  worker=ACHelper.getInstance();
  worker.setCoreInstance(this);
  super.onEnable();
  TerminalCommandManager.getInstance().setPerm(this);
  worker.loadInfos();
  permissionLinker.registerAllPermParent();
  ACPlayerListener playerListener=new ACPlayerListener();
  ACEntityListener entityListener=new ACEntityListener();
  ACBlockListener blkListener=new ACBlockListener();
  pm.registerEvent(Event.Type.PLAYER_INTERACT,playerListener,Priority.Normal,this);
  pm.registerEvent(Event.Type.PLAYER_JOIN,playerListener,Priority.Normal,this);
  pm.registerEvent(Event.Type.PLAYER_QUIT,playerListener,Priority.Normal,this);
  pm.registerEvent(Event.Type.PLAYER_TELEPORT,playerListener,Priority.Normal,this);
  pm.registerEvent(Event.Type.PLAYER_MOVE,playerListener,Priority.Normal,this);
  pm.registerEvent(Event.Type.PLAYER_RESPAWN,playerListener,Priority.Low,this);
  pm.registerEvent(Event.Type.PLAYER_LOGIN,playerListener,Priority.Normal,this);
  pm.registerEvent(Event.Type.PLAYER_CHAT,playerListener,Priority.Normal,this);
  pm.registerEvent(Event.Type.PLAYER_COMMAND_PREPROCESS,playerListener,Priority.Lowest,this);
  pm.registerEvent(Event.Type.PLAYER_PICKUP_ITEM,playerListener,Priority.Normal,this);
  pm.registerEvent(Event.Type.ENTITY_DAMAGE,entityListener,Priority.High,this);
  pm.registerEvent(Event.Type.ENTITY_TARGET,entityListener,Priority.High,this);
  pm.registerEvent(Event.Type.ENTITY_DEATH,entityListener,Priority.Normal,this);
  try {
    pm.registerEvent(Event.Type.FOOD_LEVEL_CHANGE,entityListener,Priority.High,this);
  }
 catch (  Throwable e) {
    if (CommandManager.getInstance().unRegisterCommand(Eternal.class,this))     CommandManager.getInstance().unRegisterCommand(Feed.class,this);
    ACLogger.info("String_Node_Str");
  }
  pm.registerEvent(Event.Type.SERVER_COMMAND,new ACServerListener(),Priority.Normal,this);
  pm.registerEvent(Event.Type.CREATURE_SPAWN,entityListener,Priority.Highest,this);
  if (worker.getConfBoolean("String_Node_Str"))   pm.registerEvent(Event.Type.SIGN_CHANGE,blkListener,Priority.Normal,this);
  pm.registerEvent(Event.Type.BLOCK_DAMAGE,blkListener,Priority.Normal,this);
  pm.registerEvent(Event.Type.WEATHER_CHANGE,new ACWeatherListener(),Priority.Normal,this);
}