listAll function not catching some bad parameters

[goosehub]

When passing incorrect parameters, in my example string as the limit, The listAll function in walmart-partner-api-sdk-php/src/Order.php is causing

Fatal error: Call to a member function getStatusCode() on a non-object in /var/www/example/Walmart/vendor/fillup/walmart-partner-api-sdk-php/src/Order.php on line 132

In the code, it currently catches Exception $e like this

} catch (\Exception $e) {
    if ($e instanceof RequestException) {
        /*
         * ListReleased and List return 404 error if no results are found, even for successful API calls,
         * So if result status is 404, transform to 200 with empty results.
         */
        /** @var ResponseInterface $response */
        $response = $e->getResponse();

        if (strval($response->getStatusCode()) === '404') {
            return [
                'statusCode' => 200,
                'list' => [
                    'meta' => [
                        'totalCount' => 0
                    ]
                ],
                'elements' => []
            ];
        }
        throw $e;
    } else {
        throw $e;
    }
}

Problem is $response is NULL. To fix this, I had to add this (not the best fix) fix under $response = $e->getResponse();.

if (!$response) {
    echo 'Walmart API SDK Error: ' . $e->getMessage();
    exit();
}

Ideally this SDK should be able to catch bad request parameters gracefully. This should be easy to replicate and hopefully not a huge hassle to fix correctly. I hope this helps.