Ticket #33148: taxonomy.diff

src/wp-includes/taxonomy.php

@@ -4423 +4423 @@
                         $ancestors = get_ancestors( $term->term_id, $taxonomy, 'taxonomy' );
                         foreach ( (array)$ancestors as $ancestor ) {
                                 $ancestor_term = get_term($ancestor, $taxonomy);
-                                $hierarchical_slugs[] = $ancestor_term->slug;
+                                if ( $ancestor_term ){
+                                        $hierarchical_slugs[] = $ancestor_term->slug;
+                                }
                         }
                         $hierarchical_slugs = array_reverse($hierarchical_slugs);
                         $hierarchical_slugs[] = $slug;