yiisoft/yii2 — pull request #976 by iJackUA (2013-10-15 06:56:52+00:00)
Title: View. Default empty array value for $params

To prevent Warning "Trying to get property of non-object" in case when nothing set to params, but you try to get some key (check is there something)

ArrayHelper::getValue($this->view->params, 'abc');