[Twig] Add missing check

fabpot · fabpot · commit 5b5b7de6609e · 2019-09-19T14:48:09.000+02:00
diff --git a/src/Symfony/Bridge/Twig/Mime/NotificationEmail.php b/src/Symfony/Bridge/Twig/Mime/NotificationEmail.php
@@ -105,6 +105,10 @@ public function importance(string $importance)
      */
     public function exception($exception)
     {
+        if (!$exception instanceof \Throwable && !$exception instanceof FlattenException) {
+            throw new \LogicException(sprintf('"%s" accepts "%s" or "%s" instances.', __METHOD__, \Throwable::class, FlattenException::class));
+        }
+
         $exceptionAsString = $this->getExceptionAsString($exception);
 
         $this->context['exception'] = true;
