[Notifier] Make sure Http TransportException is not leaking

Author: Nyholm

LinkedInTransport.php

@@ -19,6 +19,7 @@
 use Symfony\Component\Notifier\Message\SentMessage;
 use Symfony\Component\Notifier\Transport\AbstractTransport;
 use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
+use Symfony\Contracts\HttpClient\Exception\TransportExceptionInterface;
 use Symfony\Contracts\HttpClient\HttpClientInterface;
 
 /**
@@ -81,7 +82,13 @@ protected function doSend(MessageInterface $message): SentMessage
             'json' => array_filter($opts ? $opts->toArray() : $this->bodyFromMessageWithNoOption($message)),
         ]);
 
-        if (201 !== $response->getStatusCode()) {
+        try {
+            $statusCode = $response->getStatusCode();
+        } catch (TransportExceptionInterface $e) {
+            throw new TransportException('Could not reach the remote LinkedIn server.', $response, 0, $e);
+        }
+
+        if (201 !== $statusCode) {
             throw new TransportException(sprintf('Unable to post the Linkedin message: "%s".', $response->getContent(false)), $response);
         }