ios - iPhone アプリケーションのクラッシュログで @callee_owned

Question

アプリケーションのクラッシュ ログがあります。この問題がわかりません:

0   Test Application   0x000e0ccc Test_Application.firstVC.(firstFunc (Test_Application.firstVC) -> () -> ()).(closure #1) (firstVC.swift:110)
1   Test Application   0x000d7f10 partial apply forwarder for Test_Application.firstVC.(firstFunc (Test_Application.firstVC) -> () -> ()).(closure #1) (firstVC.swift:0)
2   Test Application   0x000d7f7c partial apply forwarder for reabstraction thunk helper from @callee_owned (@owned ObjectiveC.NSData!, @owned ObjectiveC.NSURLResponse!, @owned ObjectiveC.NSError!) -> (@unowned ()) to @callee_owned (@in (ObjectiveC.NSData!, ObjectiveC.NSURLResponse!, ObjectiveC.NSError!)) -> (@out ()) (firstVC.swift:0)
3   Test Application   0x000d7ffc partial apply forwarder for reabstraction thunk helper from @callee_owned (@in (ObjectiveC.NSData!, ObjectiveC.NSURLResponse!, ObjectiveC.NSError!)) -> (@out ()) to @callee_owned (@owned ObjectiveC.NSData!, @owned ObjectiveC.NSURLResponse!, @owned ObjectiveC.NSError!) -> (@unowned ()) (firstVC.swift:0)

私が持っている約110行：

let request = NSMutableURLRequest(URL:NSURL(string: "http://localhost.com/")!)
        let session = NSURLSession(configuration: NSURLSessionConfiguration.defaultSessionConfiguration())
        var bodyData = "test=true"

        request.HTTPMethod = "POST"
        request.HTTPBody = bodyData.dataUsingEncoding(NSUTF8StringEncoding)

        var postData = session.dataTaskWithRequest(request, completionHandler: {(data : NSData!, response : NSURLResponse!, error : NSError!) in

                var jsonDict: AnyObject! = NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.MutableContainers, error: nil)
        })

XCodeからアプリケーションをデバッグしようとするとうまくいくので、これは特に奇妙です! しかし、アドホック展開 (diawi.com または TestFlight.com) を使用しようとすると、このエラーが発生します。