Program: 57045
Project: 57045
Buggy source:
private static StringBuilder generateAJAXCallForClientBehavior(FacesContext context,IAJAXComponent component,ClientBehavior ajaxBehavior){
  StringBuilder cJS=new StringBuilder(150);
  String update=component.getUpdate();
  String oncomplete=component.getOncomplete();
  String process=component.getProcess();
  String onevent="String_Node_Str";
  if (ajaxBehavior != null) {
    if (ajaxBehavior instanceof AjaxBehavior) {
      boolean disabled=((AjaxBehavior)ajaxBehavior).isDisabled();
      if (!disabled) {
        String onerror=((AjaxBehavior)ajaxBehavior).getOnerror();
        onevent=((AjaxBehavior)ajaxBehavior).getOnevent();
        if (onevent == null)         onevent="String_Node_Str";
 else         if (onevent.length() > 0)         onevent=onevent + "String_Node_Str";
        Collection<String> execute=((AjaxBehavior)ajaxBehavior).getExecute();
        if (null != execute && (!execute.isEmpty())) {
          for (          String u : execute) {
            process+="String_Node_Str" + u;
          }
        }
        Collection<String> render=((AjaxBehavior)ajaxBehavior).getRender();
        if (null != render && (!render.isEmpty())) {
          update="String_Node_Str";
          for (          String u : render) {
            update+=u + "String_Node_Str";
          }
        }
        oncomplete=component.getOncomplete();
      }
    }
  }
  process=ExpressionResolver.getComponentIDs(context,(UIComponent)component,process);
  update=ExpressionResolver.getComponentIDs(context,(UIComponent)component,update);
  cJS.append(encodeClick(component)).append(onevent).append("String_Node_Str").append(update == null ? "String_Node_Str" : ("String_Node_Str" + update + "String_Node_Str")).append(process == null ? "String_Node_Str" : ("String_Node_Str" + process.trim() + "String_Node_Str"));
  if (oncomplete != null) {
    cJS.append("String_Node_Str" + oncomplete + "String_Node_Str");
  }
  cJS.append("String_Node_Str");
  return cJS;
}

Fixed version (ground truth):
private static StringBuilder generateAJAXCallForClientBehavior(FacesContext context,IAJAXComponent component,ClientBehavior ajaxBehavior){
  StringBuilder cJS=new StringBuilder(150);
  String update=component.getUpdate();
  String oncomplete=component.getOncomplete();
  String process=component.getProcess();
  String onevent="String_Node_Str";
  if (ajaxBehavior != null) {
    if (ajaxBehavior instanceof AjaxBehavior) {
      boolean disabled=((AjaxBehavior)ajaxBehavior).isDisabled();
      if (!disabled) {
        String onerror=((AjaxBehavior)ajaxBehavior).getOnerror();
        onevent=((AjaxBehavior)ajaxBehavior).getOnevent();
        if (onevent == null)         onevent="String_Node_Str";
 else         if (onevent.length() > 0)         onevent=onevent + "String_Node_Str";
        Collection<String> execute=((AjaxBehavior)ajaxBehavior).getExecute();
        if (null != execute && (!execute.isEmpty())) {
          for (          String u : execute) {
            if (null == process)             process=u;
 else             process+="String_Node_Str" + u;
          }
        }
        Collection<String> render=((AjaxBehavior)ajaxBehavior).getRender();
        if (null != render && (!render.isEmpty())) {
          update="String_Node_Str";
          for (          String u : render) {
            update+=u + "String_Node_Str";
          }
        }
        oncomplete=component.getOncomplete();
      }
    }
  }
  process=ExpressionResolver.getComponentIDs(context,(UIComponent)component,process);
  update=ExpressionResolver.getComponentIDs(context,(UIComponent)component,update);
  cJS.append(encodeClick(component)).append(onevent).append("String_Node_Str").append(update == null ? "String_Node_Str" : ("String_Node_Str" + update + "String_Node_Str")).append(process == null ? "String_Node_Str" : ("String_Node_Str" + process.trim() + "String_Node_Str"));
  if (oncomplete != null) {
    cJS.append("String_Node_Str" + oncomplete + "String_Node_Str");
  }
  cJS.append("String_Node_Str");
  return cJS;
}