Breadcrumbs for page parent creates an infinite loop

[jazzsequence]

http://museumthemes.com/core/parent-page/child-page-1/

Reported in: https://wordpress.org/support/topic/breadcrumbs-bug

Relevant code (like 938 functions.php):

 while ( $parent_id ) {
                $page = get_post($parent_id);
                $breadcrumbs[] = '<li><span typeof="v:Breadcrumb"><a rel="v:url" property="v:title" href="' . get_permalink($page->ID) . '">' . get_the_title( $page->ID ) . '</a></span></li>';
            }

[jazzsequence]

This was submitted by Eric Deiter via email:

 //Iterate back to root
 while ($parent_id != 0) {
      $page = get_post($parent_id);
      $breadcrumbs[] = ‘<li><span typeof=“v:Breadcrumb”><a rel=“v:url” property=“v:title” href=“’ . get_permalink($page->ID) . ‘”>’ . get_the_title( $page->ID ) . ‘</a></span></li>’;
      //Get next parent, walk backwards
      $parent_id = $page->post_parent;
 }
 $breadcrumbs = array_reverse( $breadcrumbs );

Needs to be tested and patched