Program: 10459
Project: 10459
Buggy source:
/** 
 * This method will parse the arguments needed to execute the Teleport command from the given script entry.  It verifies that the format of the command is accurate.  If not, it will throw an InvalidArgumentException with the error message.
 * @param scriptEntry	The script entry processing this command.
 * @throws InvalidArgumentsException
 */
@Override public void parseArgs(ScriptEntry scriptEntry) throws InvalidArgumentsException {
  List<LivingEntity> teleportEntities=new ArrayList<LivingEntity>();
  List<NPC> teleportNPCs=new ArrayList<NPC>();
  Location teleportLocation=null;
  Boolean teleportPlayer=true;
  for (  String arg : scriptEntry.getArguments()) {
    if (arg.equalsIgnoreCase(TeleportCommand.NPC_ARG)) {
      teleportNPCs.add(scriptEntry.getNPC().getCitizen());
      teleportPlayer=false;
    }
 else     if (aH.matchesLocation(arg))     teleportLocation=aH.getLocationFrom(arg);
 else     if (aH.matchesValueArg("String_Node_Str",arg,ArgumentType.Custom)) {
      teleportPlayer=false;
      for (      String target : aH.getListFrom(arg)) {
        if (CitizensAPI.getNPCRegistry().getNPC(aH.getLivingEntityFrom(target)) != null) {
          teleportNPCs.add(CitizensAPI.getNPCRegistry().getNPC(aH.getLivingEntityFrom(target)));
          continue;
        }
 else         if (aH.getLivingEntityFrom(target) != null && aH.getLivingEntityFrom(target) instanceof Player) {
          teleportEntities.add(aH.getPlayerFrom(target));
          continue;
        }
        dB.echoError("String_Node_Str",target);
      }
    }
 else     throw new InvalidArgumentsException(dB.Messages.ERROR_UNKNOWN_ARGUMENT,arg);
  }
  if (teleportPlayer == true) {
    teleportEntities.add(scriptEntry.getPlayer());
  }
  if (teleportLocation == null)   throw new InvalidArgumentsException("String_Node_Str");
  if (teleportEntities.isEmpty() && teleportNPCs.isEmpty())   throw new InvalidArgumentsException("String_Node_Str");
  scriptEntry.addObject("String_Node_Str",teleportLocation);
  scriptEntry.addObject("String_Node_Str",teleportEntities);
  scriptEntry.addObject("String_Node_Str",teleportNPCs);
}

Fixed version (ground truth):
/** 
 * This method will parse the arguments needed to execute the Teleport command from the given script entry.  It verifies that the format of the command is accurate.  If not, it will throw an InvalidArgumentException with the error message.
 * @param scriptEntry	The script entry processing this command.
 * @throws InvalidArgumentsException
 */
@Override public void parseArgs(ScriptEntry scriptEntry) throws InvalidArgumentsException {
  List<LivingEntity> teleportEntities=new ArrayList<LivingEntity>();
  List<NPC> teleportNPCs=new ArrayList<NPC>();
  Location teleportLocation=null;
  Boolean teleportPlayer=true;
  for (  String arg : scriptEntry.getArguments()) {
    if (arg.equalsIgnoreCase(TeleportCommand.NPC_ARG)) {
      teleportNPCs.add(scriptEntry.getNPC().getCitizen());
      teleportPlayer=false;
    }
 else     if (aH.matchesLocation(arg))     teleportLocation=aH.getLocationFrom(arg);
 else     if (aH.matchesValueArg("String_Node_Str",arg,ArgumentType.Custom)) {
      teleportPlayer=false;
      for (      String target : aH.getListFrom(arg)) {
        if (CitizensAPI.getNPCRegistry().getNPC(aH.getLivingEntityFrom(target)) != null) {
          teleportNPCs.add(CitizensAPI.getNPCRegistry().getNPC(aH.getLivingEntityFrom(target)));
          continue;
        }
 else         if (aH.getLivingEntityFrom(target) != null && aH.getLivingEntityFrom(target) instanceof Player) {
          teleportEntities.add(aH.getPlayerFrom(target));
          continue;
        }
        dB.echoError("String_Node_Str",target);
      }
    }
 else     throw new InvalidArgumentsException(dB.Messages.ERROR_UNKNOWN_ARGUMENT,arg);
  }
  if (teleportPlayer == true) {
    teleportEntities.add(scriptEntry.getPlayer());
  }
  if (teleportLocation == null)   throw new InvalidArgumentsException("String_Node_Str");
  if (teleportEntities.isEmpty() && teleportNPCs.isEmpty())   throw new InvalidArgumentsException("String_Node_Str");
  scriptEntry.addObject("String_Node_Str",teleportLocation).addObject("String_Node_Str",teleportEntities).addObject("String_Node_Str",teleportNPCs);
}