title: Could not cast value of type NSSingleObjectArray to NSMutableArray
body: <p>Since iOS10, i am facing to this issue :</p>
  
  <blockquote>
    <p>Could not cast value of type '__NSSingleObjectArrayI' to
    'NSMutableArray' .</p>
  </blockquote>
  
  <p>There is my code :</p>
  
  <pre><code>manage.POST( url, parameters: params,
                       constructingBodyWithBlock: { (data: AFMultipartFormData!) in
                          //Some stuff here
              },
                       success: { (operation: NSURLSessionDataTask?, responseObject: AnyObject?) in
  
                           var array : NSMutableArray!
  
                          if AppConfig.sharedInstance().OCR == "2"{
                              let dictionnary = responseObject as! NSDictionary
                              array = dictionnary["data"]! as! NSMutableArray
                          }else{
                              //!!!!CRASH HERE!!!!!     
                              array  = responseObject as! NSMutableArray
                          }
                          //Some stuff after
  }
  </code></pre>
  
  <p>When i look for responseObject value, i have this in my console :</p>
  
  <pre><code>Printing description of responseObject:
  ▿ Optional&lt;AnyObject&gt;
    ▿ Some : 1 elements
      - [0] : Test     
  </code></pre>
  
  <p>How can i extract value "Test" from responseObject ?</p>
  
  <p>Many thanks</p>