[VarDumper] Notice: Undefined offset when dumping casted array from object with PHP7 #19356
Description
I've got an Undefined offset notice here: https://github.com/symfony/symfony/blob/2.8/src/Symfony/Component/VarDumper/Cloner/VarCloner.php#L74
Simplest example:
$obj = json_decode('{"1":1,"2":1}');
$array = (array) $obj;
dump($array);Environment:
$ composer.phar show | grep symfony/symfony
symfony/symfony v2.8.8 The Symfony PHP framework
$ php -v
PHP 7.0.8-3+deb.sury.org~xenial+1 (cli) ( NTS )
Copyright (c) 1997-2016 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies
with Zend OPcache v7.0.8-3+deb.sury.org~xenial+1, Copyright (c) 1999-2016, by Zend Technologies