moodle-assignfeedback_editpdf-editor.js can end up in an infinite loop

poll = false;

if (data) {

this.documentstatus = data.status;

if (data.status === 0) {

    // The combined document is still waiting for input to be ready.

    poll = true;} else if (data.status === 1 || data.status === 3) {

    // The combine document is ready for conversion into a single PDF.

    poll = true;} else if (data.status === 2 || data.status === -1) {

    // The combined PDF is ready.

    // We now know the page count and can convert it to a set of images.

    this.pagecount = data.pagecount;    if (data.pageready == data.pagecount) {

        this.prepare_pages_for_display(data);

    } else {

        // Some pages are not ready yet.

        // Note: We use a different polling process here which does not block.

        this.update_page_load_progress();        // Fetch the images for the combined document.

        this.start_document_to_image_conversion();

    }

}if (poll) {

    // Check again in 1 second.

    Y.later(1000, this, this.poll_document_conversion_status);

}