Show error message in UnhandledWebDriverError

(Thanks to @slowbro)

Author: whhone

lib/remote/HttpCommandExecutor.php

@@ -233,8 +233,8 @@ protected static function curl(http://github.com/%3C/div%3E%3C/code%3E%3C/div%3E%3C/td%3E%3C/tr%3E%3Ctr%20class=%22diff-line-row%22%3E%3Ctd%20data-grid-cell-id=%22diff-00b9e1a13f81274c9438ea7b8b04439deb5b9024e14273a54de0306d74d657f3-233-233-0%22%20data-selected=%22false%22%20role=%22gridcell%22%20style=%22background-color:var(--bgColor-default);text-align:center" tabindex="-1" valign="top" class="focusable-grid-cell diff-line-number position-relative diff-line-number-neutral left-side">233
 
     $message = null;
-    if (is_array($results) && array_key_exists('message', $results)) {
-      $message = $results['message'];
+    if (is_array($value) && array_key_exists('message', $value)) {
+      $message = $value['message'];
     }
 
     $sessionId = null;