Ticket #19205: 19205.diff

wp-includes/taxonomy.php

@@ -2059 +2059 @@
 
         $defaults = array( 'alias_of' => '', 'description' => '', 'parent' => 0, 'slug' => '');
         $args = wp_parse_args($args, $defaults);
+
+        if ( $args['parent'] > 0 && ! term_exists( intval( $args['parent'] ) ) )
+                return new WP_Error('missing_parent', __('The selected parent term no longer exists'));
+
         $args['name'] = $term;
         $args['taxonomy'] = $taxonomy;
         $args = sanitize_term($args, $taxonomy, 'db');