Ticket #42469: 42469.1.patch

src/wp-includes/class-wp-query.php

@@ -3030 +3030 @@
                          * @param string   $found_posts The query to run to find the found posts.
                          * @param WP_Query $this        The WP_Query instance (passed by reference).
                          */
-                        $this->found_posts = $wpdb->get_var( apply_filters_ref_array( 'found_posts_query', array( 'SELECT FOUND_ROWS()', &$this ) ) );
+                        $found_posts_query = apply_filters_ref_array( 'found_posts_query', array( 'SELECT FOUND_ROWS()', &$this ) );
+
+                        $this->found_posts = (int) $wpdb->get_var( $found_posts_query );
                 } else {
                         $this->found_posts = count( $this->posts );
                 }