Program: 102432
Project: 102432
Buggy source:
@Override public void execute(Event<UIComposer> event) throws Exception {
  UIComposer uiComposer=event.getSource();
  UIActivityComposerManager activityComposerManager=uiComposer.getActivityComposerManager();
  PostContext postContext=uiComposer.getPostContext();
  UIActivityComposer activityComposer=activityComposerManager.getCurrentActivityComposer();
  if (activityComposer.isDisplayed() && !activityComposer.isReadyForPostingActivity()) {
    activityComposerManager.setDefaultActivityComposer();
  }
  activityComposer=activityComposerManager.getCurrentActivityComposer();
  UIFormTextAreaInput textAreaInput=uiComposer.getUIFormTextAreaInput(COMPOSER_TEXT_AREA_INPUT);
  String message=textAreaInput.getValue();
  textAreaInput.setValue("String_Node_Str");
  message=(message == null || uiComposer.getLabel("String_Node_Str").equals(message) || uiComposer.getLabel("String_Node_Str").equals(message)) ? "String_Node_Str" : message;
  ExoSocialActivity activity=activityComposer.postActivity(postContext,message);
  Utils.clearUserProfilePopup();
  Utils.initUserProfilePopup(uiComposer.getId());
  Utils.resizeHomePage();
  if (activity != null) {
    WebuiRequestContext context=event.getRequestContext();
    UIPortletApplication uiPortlet=uiComposer.getAncestorOfType(UIPortletApplication.class);
    if (uiPortlet.findFirstComponentOfType(BaseUIActivity.class) == null) {
      context.addUIComponentToUpdateByAjax(uiPortlet);
    }
 else {
      UIActivitiesContainer uiActivitiesContainer=uiPortlet.findFirstComponentOfType(UIActivitiesContainer.class);
      uiActivitiesContainer.addFirstActivityId(activity.getId());
      UIActivityLoader uiActivityLoader=uiActivitiesContainer.addChild(UIActivityLoader.class,null,"String_Node_Str" + activity.getId());
      context.getJavascriptManager().getRequireJS().require("String_Node_Str","String_Node_Str").addScripts("String_Node_Str" + uiActivityLoader.getId() + "String_Node_Str");
      context.addUIComponentToUpdateByAjax(uiComposer);
    }
  }
}

Fixed version (ground truth):
@Override public void execute(Event<UIComposer> event) throws Exception {
  UIComposer uiComposer=event.getSource();
  UIActivityComposerManager activityComposerManager=uiComposer.getActivityComposerManager();
  PostContext postContext=uiComposer.getPostContext();
  UIActivityComposer activityComposer=activityComposerManager.getCurrentActivityComposer();
  if (activityComposer.isDisplayed() && !activityComposer.isReadyForPostingActivity()) {
    activityComposerManager.setDefaultActivityComposer();
  }
  activityComposer=activityComposerManager.getCurrentActivityComposer();
  UIFormTextAreaInput textAreaInput=uiComposer.getUIFormTextAreaInput(COMPOSER_TEXT_AREA_INPUT);
  String message=textAreaInput.getValue();
  textAreaInput.setValue("String_Node_Str");
  message=(message == null || uiComposer.getLabel("String_Node_Str").equals(message) || uiComposer.getLabel("String_Node_Str").equals(message)) ? "String_Node_Str" : message;
  ExoSocialActivity activity=activityComposer.postActivity(postContext,message);
  Utils.clearUserProfilePopup();
  Utils.initUserProfilePopup(uiComposer.getId());
  Utils.resizeHomePage();
  if (activity != null) {
    WebuiRequestContext context=event.getRequestContext();
    UIPortletApplication uiPortlet=uiComposer.getAncestorOfType(UIPortletApplication.class);
    if (uiPortlet.findFirstComponentOfType(BaseUIActivity.class) == null) {
      context.addUIComponentToUpdateByAjax(uiPortlet);
    }
 else {
      UIActivitiesContainer uiActivitiesContainer=uiPortlet.findFirstComponentOfType(UIActivitiesContainer.class);
      uiActivitiesContainer.addFirstActivityId(activity.getId());
      UIActivityLoader uiActivityLoader=uiActivitiesContainer.addChild(UIActivityLoader.class,null,UIActivityLoader.buildComponentId(activity.getId()));
      context.getJavascriptManager().getRequireJS().require("String_Node_Str","String_Node_Str").addScripts("String_Node_Str" + uiActivityLoader.getId() + "String_Node_Str");
      context.addUIComponentToUpdateByAjax(uiComposer);
    }
  }
}