Fixed NativeSessionStorage:regenerate when does not exists

lyrixx · fabpot · commit 52e530da1f80 · 2013-07-15T14:12:07.000+02:00
diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php b/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php
@@ -209,9 +209,13 @@ public function regenerate($destroy = false, $lifetime = null)
 
         // workaround for https://bugs.php.net/bug.php?id=61470 as suggested by David Grudl
         session_write_close();
-        $backup = $_SESSION;
-        session_start();
-        $_SESSION = $backup;
+        if (isset($_SESSION)) {
+            $backup = $_SESSION;
+            session_start();
+            $_SESSION = $backup;
+        } else {
+            session_start();
+        }
 
         return $ret;
     }
