Ticket #27362: query.php.patch

src/wp-includes/query.php

@@ -3663 +3663 @@
                                         $term = get_term_by( 'slug', $this->get( 'category_name' ), 'category' );
                                 }
                         } elseif ( $this->is_tag ) {
-                                $term = get_term( $this->get( 'tag_id' ), 'post_tag' );
+                                if ( $this->get( 'tag_id' ) ) {
+                                        $term = get_term( $this->get( 'tag_id' ), 'post_tag' );
+                                } elseif ( $this->get( 'tag' ) ) {
+                                        $term = get_term_by( 'slug', $this->get( 'tag' ), 'post_tag' );
+                                }
                         } else {
                                 $tax_query_in_and = wp_list_filter( $this->tax_query->queries, array( 'operator' => 'NOT IN' ), 'NOT' );
                                 $query = reset( $tax_query_in_and );