Ticket #16145: tag_in.diff

public/wp-includes/query.php

@@ -1710 +1710 @@
                 }
 
                 // Tag stuff
-                if ( !empty($qv['tag_id']) ) {
+                if ( !empty($q['tag_id']) ) {
                         $tax_query[] = array(
                                 'taxonomy' => 'post_tag',
-                                'terms' => $qv['tag_id'],
+                                'terms' => $q['tag_id'],
                         );
                 }