Ticket #14111: ticket.14111.2.diff

wp-includes/post.php

@@ -2770 +2770 @@
         if ( ! is_array( $feeds ) )
                 $feeds = array();
 
+        $override_slug = apply_filters( "wp_unique_post_slug_{$post_type}", '', $slug, $post_ID, $post_status, $post_type, $post_parent );
+
+        if ( $override_slug )
+                return $override_slug;
+
         $hierarchical_post_types = get_post_types( array('hierarchical' => true) );
         if ( 'attachment' == $post_type ) {
                 // Attachment slugs must be unique across all types.