Ticket #25572: 25572.2.diff

src/wp-admin/includes/class-wp-upgrader.php

@@ -1507 +1507 @@
                 // Search all directories we've found for evidence of version control.
                 foreach ( $vcs_dirs as $vcs_dir ) {
                         foreach ( $check_dirs as $check_dir ) {
-                                if ( $checkout = is_dir( rtrim( $check_dir, '\\/' ) . "/$vcs_dir" ) )
+                                if ( $checkout = @is_dir( rtrim( $check_dir, '\\/' ) . "/$vcs_dir" ) )
                                         break 2;
                         }
                 }