From 60f49febad70cb6ebf3b3be856a74c89c17a5aeb Mon Sep 17 00:00:00 2001
From: Fabien Potencier <fabien@potencier.org>
Date: Sun, 24 Jul 2022 15:08:00 +0200
Subject: [PATCH] [Mailer] Throw a more specific exception when a
 BodyRendererInterface is needed by not configured

---
 .../Component/Mailer/EventListener/MessageListener.php      | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/Symfony/Component/Mailer/EventListener/MessageListener.php b/src/Symfony/Component/Mailer/EventListener/MessageListener.php
index 951b5a4d81ab..9688ddddc394 100644
--- a/src/Symfony/Component/Mailer/EventListener/MessageListener.php
+++ b/src/Symfony/Component/Mailer/EventListener/MessageListener.php
@@ -11,10 +11,12 @@
 
 namespace Symfony\Component\Mailer\EventListener;
 
+use Symfony\Bridge\Twig\Mime\TemplatedEmail;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 use Symfony\Component\Mailer\Event\MessageEvent;
 use Symfony\Component\Mailer\Exception\InvalidArgumentException;
 use Symfony\Component\Mailer\Exception\RuntimeException;
+use Symfony\Component\Mailer\Exception\LogicException;
 use Symfony\Component\Mime\BodyRendererInterface;
 use Symfony\Component\Mime\Header\Headers;
 use Symfony\Component\Mime\Header\MailboxListHeader;
@@ -119,6 +121,10 @@ private function setHeaders(Message $message): void
     private function renderMessage(Message $message): void
     {
         if (!$this->renderer) {
+            if ($message instanceof TemplatedEmail && ($message->getTextTemplate() || $message->getHtmlTemplate())) {
+                throw new LogicException(sprintf('You must configure a "%s" when a "%s" instance has a text or HTML template set.', BodyRendererInterface::class, get_debug_type($message)));
+            }
+
             return;
         }