Ticket #23423: 23423.patch

src/wp-includes/widget-functions.php

@@ -504 +504 @@
 function dynamic_sidebar($index = 1) {
         global $wp_registered_sidebars, $wp_registered_widgets;
 
-        if ( is_int($index) ) {
+        if ( is_int( $index ) ) {
                 $index = "sidebar-$index";
         } else {
-                $index = sanitize_title($index);
+                $sanitized_index = sanitize_title( $index );
                 foreach ( (array) $wp_registered_sidebars as $key => $value ) {
-                        if ( sanitize_title($value['name']) == $index ) {
+                        if ( sanitize_title( $value['name'] ) == $sanitized_index ) { 
                                 $index = $key;
                                 break;
                         }