test

    libhtmlpp::HtmlElement wrapper("div");

    auto *el = node;

    while (el) {

        // A single widget's Render() throwing (e.g. libhtmlpp::HtmlElement::

        // setAttribute rejects any literal '"' in an attribute value with no

        // escaping, just an outright exception -- easy to hit via imported

        // content that ends up embedded in a style="..." string) must not

        // take down preview/publish for the WHOLE document -- both call this

        // with no try/catch of their own, so an uncaught exception here

        // propagates all the way to the generic HTTP request handler and

        // comes back as a bare "Internal server error", discarding

        // everything else on the page along with it. Render is const, so

        // skipping this one top-level element leaves every sibling

        // unaffected.

        try {

            el->Render(wrapper);

        } catch (const std::exception &e) {

            std::cerr << "renderTree: widget Render() failed, skipping: " << e.what() << std::endl;

        } catch (...) {

            std::cerr << "renderTree: widget Render() failed, skipping (unknown exception)" << std::endl;

        }

        el = el->nextElement();

    }

    libhtmlpp::HtmlString hs;