Program: 101156
Project: 101156
Buggy source:
public String getEditModeContent(){
  StringBuilder portletContent=new StringBuilder();
  try {
    PortalRequestContext prcontext=(PortalRequestContext)WebuiRequestContext.getCurrentInstance();
    prcontext.setFullRender(true);
    ExoContainer container=prcontext.getApplication().getApplicationServiceContainer();
    PortletContainerService portletContainer=(PortletContainerService)container.getComponentInstanceOfType(PortletContainerService.class);
    RenderInput input=new RenderInput();
    String baseUrl=new StringBuilder(prcontext.getNodeURI()).append("String_Node_Str" + PortalRequestContext.UI_COMPONENT_ID).append("String_Node_Str").append(uiPortlet_.getId()).toString();
    input.setBaseURL(baseUrl);
    input.setUserAttributes(new HashMap<String,String>());
    input.setPortletMode(PortletMode.EDIT);
    input.setWindowState(uiPortlet_.getCurrentWindowState());
    input.setMarkup("String_Node_Str");
    input.setTitle(uiPortlet_.getTitle());
    input.setInternalWindowID(uiPortlet_.getExoWindowID());
    input.setRenderParameters(getRenderParameterMap(uiPortlet_));
    input.setPublicParamNames(uiPortlet_.getPublicRenderParamNames());
    RenderOutput output=portletContainer.render(prcontext.getRequest(),prcontext.getResponse(),input);
    if (output.getContent() == null) {
      portletContent.append("String_Node_Str").append(uiPortlet_.getId()).append("String_Node_Str");
    }
 else {
      portletContent.setLength(0);
      portletContent.append(output.getContent());
    }
  }
 catch (  Throwable ex) {
    ex=ExceptionUtil.getRootCause(ex);
    portletContent.append(ExceptionUtil.getStackTrace(ex,100));
    System.err.println("String_Node_Str" + portletContent);
  }
  return portletContent.toString();
}

Fixed version (ground truth):
public String getEditModeContent(){
  StringBuilder portletContent=new StringBuilder();
  try {
    PortalRequestContext prcontext=(PortalRequestContext)WebuiRequestContext.getCurrentInstance();
    prcontext.setFullRender(true);
    ExoContainer container=prcontext.getApplication().getApplicationServiceContainer();
    PortletContainerService portletContainer=(PortletContainerService)container.getComponentInstanceOfType(PortletContainerService.class);
    RenderInput input=new RenderInput();
    String baseUrl=new StringBuilder(prcontext.getRequestURI()).append("String_Node_Str" + PortalRequestContext.UI_COMPONENT_ID).append("String_Node_Str").append(uiPortlet_.getId()).toString();
    input.setBaseURL(baseUrl);
    input.setUserAttributes(new HashMap<String,String>());
    input.setPortletMode(PortletMode.EDIT);
    input.setWindowState(uiPortlet_.getCurrentWindowState());
    input.setMarkup("String_Node_Str");
    input.setTitle(uiPortlet_.getTitle());
    input.setInternalWindowID(uiPortlet_.getExoWindowID());
    input.setRenderParameters(getRenderParameterMap(uiPortlet_));
    input.setPublicParamNames(uiPortlet_.getPublicRenderParamNames());
    RenderOutput output=portletContainer.render(prcontext.getRequest(),prcontext.getResponse(),input);
    if (output.getContent() == null) {
      portletContent.append("String_Node_Str").append(uiPortlet_.getId()).append("String_Node_Str");
    }
 else {
      portletContent.setLength(0);
      portletContent.append(output.getContent());
    }
  }
 catch (  Throwable ex) {
    ex=ExceptionUtil.getRootCause(ex);
    portletContent.append(ExceptionUtil.getStackTrace(ex,100));
    System.err.println("String_Node_Str" + portletContent);
  }
  return portletContent.toString();
}