Ticket #17760: 17760.2.diff

wp-admin/includes/update-core.php

@@ -344 +344 @@
         $roots = array( '/wordpress/', '/wordpress-mu/' );
         foreach( $roots as $root ) {
                 if ( $wp_filesystem->exists($from . $root . 'wp-settings.php') && $wp_filesystem->exists($from . $root . 'wp-admin/admin.php') &&
-                        $wp_filesystem->exists($from . $root . 'wp-includes/functions.php') ) {
+                        $wp_filesystem->exists($from . $root . 'wp-includes/version.php') ) {
                         $distro = $root;
                         break;
                 }