safer exception rendering

framework/base/ErrorHandler.php

@@ -81,6 +81,7 @@ class ErrorHandler extends Component
 			if (isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH'] === 'XMLHttpRequest') {
 				\Yii::$app->renderException($exception);
 			} else {
+				try {
 					$view = new View;
 					if (!YII_DEBUG || $exception instanceof UserException) {
 						$viewName = $this->errorView;
@@ -91,6 +92,10 @@ class ErrorHandler extends Component
 						'exception' => $exception,
 					), $this);
 				}
+				catch (\Exception $e) {
+					\Yii::$app->renderException($e);
+				}
+			}
 		} else {
 			\Yii::$app->renderException($exception);
 		}