Ticket #22252: 22252.diff

wp-includes/theme.php

@@ -682 +682 @@
         if ( count( $wp_theme_directories ) > 1 ) {
                 update_option( 'template_root', get_raw_theme_root( $template, true ) );
                 update_option( 'stylesheet_root', get_raw_theme_root( $stylesheet, true ) );
+        } else {
+                delete_option( 'template_root' );
+                delete_option( 'stylesheet_root' );
         }
 
         $new_name  = $new_theme->get('Name');