提交的内容

vendor/guzzlehttp/command/src/Exception/CommandException.php

@@ -57,17 +57,15 @@ class CommandException extends \RuntimeException implements GuzzleException
     }
 
     /**
-     * @param string            $message  Exception message
-     * @param \Exception        $previous Previous exception (if any)
-     * @param RequestInterface  $request
-     * @param ResponseInterface $response
+     * @param string          $message  Exception message
+     * @param \Exception|null $previous Previous exception (if any)
      */
     public function __construct(
         $message,
         CommandInterface $command,
-        \Exception $previous = null,
-        RequestInterface $request = null,
-        ResponseInterface $response = null
+        ?\Exception $previous = null,
+        ?RequestInterface $request = null,
+        ?ResponseInterface $response = null
     ) {
         $this->command = $command;
         $this->request = $request;