Program: 46099
Project: 46099
Buggy source:
private void joinButtonActionPerformed(java.awt.event.ActionEvent evt){
  String group=caller.userID.getUsername() + "String_Node_Str" + groupNumber++;
  String chatters="String_Node_Str";
  Object[] selectedValues=buddyList.getSelectedValues();
  for (int i=0; i < selectedValues.length; i++) {
    if (i > 0) {
      chatters+="String_Node_Str";
    }
    chatters+=NameTagNode.getUsername((String)selectedValues[i]);
  }
  String callerString=caller.usernameAlias;
  chatters=chatters.replaceAll("String_Node_Str" + callerString,"String_Node_Str");
  chatters=chatters.replaceAll(callerString + "String_Node_Str","String_Node_Str");
  chatters=chatters.replaceAll(callerString,"String_Node_Str");
  logger.info("String_Node_Str" + group + "String_Node_Str"+ caller+ "String_Node_Str"+ chatters+ "String_Node_Str"+ chatType);
  PresenceInfo[] chattersInfo=new PresenceInfo[0];
  if (chatters.length() > 0) {
    chattersInfo=getPresenceInfo(pm,chatters);
  }
  InCallDialog inCallDialog=new InCallDialog(client,session,cellID,group,chatType);
  inCallDialog.setLocation(new Point((int)getLocation().getX() + getWidth(),(int)getLocation().getY()));
  String name=nameTextField.getText();
  session.send(client,new VoiceChatJoinMessage(group,caller,chattersInfo,chatType));
  logger.info("String_Node_Str");
  if (phoneNumberTextField.getText().length() > 0 && name.length() > 0) {
    mostRecentDialout=new PresenceInfo(null,null,new WonderlandIdentity(name,name,null),null);
    mostRecentDialout.usernameAlias=name;
    client.addMemberChangeListener(group,this);
    session.send(client,new VoiceChatDialOutMessage(group,caller.callID,chatType,mostRecentDialout,phoneNumberTextField.getText()));
    nameTextField.setText("String_Node_Str");
    phoneNumberTextField.setText("String_Node_Str");
    joinButton.setEnabled(false);
  }
}

Fixed version (ground truth):
private void joinButtonActionPerformed(java.awt.event.ActionEvent evt){
  String group=caller.userID.getUsername() + "String_Node_Str" + groupNumber++;
  ArrayList<PresenceInfo> chattersInfo=new ArrayList();
  Object[] selectedValues=buddyList.getSelectedValues();
  for (int i=0; i < selectedValues.length; i++) {
    PresenceInfo[] info=pm.getAliasPresenceInfo((String)selectedValues[i]);
    if (info == null || info.length == 0) {
      System.out.println("String_Node_Str" + (String)selectedValues[i]);
      continue;
    }
    chattersInfo.add(info[0]);
  }
  String callerString=caller.usernameAlias;
  InCallDialog inCallDialog=new InCallDialog(client,session,cellID,group,chatType);
  inCallDialog.setLocation(new Point((int)getLocation().getX() + getWidth(),(int)getLocation().getY()));
  String name=nameTextField.getText();
  session.send(client,new VoiceChatJoinMessage(group,caller,chattersInfo.toArray(new PresenceInfo[0]),chatType));
  logger.info("String_Node_Str");
  if (phoneNumberTextField.getText().length() > 0 && name.length() > 0) {
    mostRecentDialout=new PresenceInfo(null,null,new WonderlandIdentity(name,name,null),null);
    mostRecentDialout.usernameAlias=name;
    client.addMemberChangeListener(group,this);
    session.send(client,new VoiceChatDialOutMessage(group,caller.callID,chatType,mostRecentDialout,phoneNumberTextField.getText()));
    nameTextField.setText("String_Node_Str");
    phoneNumberTextField.setText("String_Node_Str");
    joinButton.setEnabled(false);
  }
}