Swift Error - Thread1: EXC_BAD_INSTRUCTION

I'm getting a Thread1: EXC_BAD_INSTRUCTION (code=EXC_1386_INVOP,subcode=0x0) after running my code in Xcode 9. The code works fine in Xcode 8.

 class func loadDataFromURL(_ url: URL, completion:@escaping (_ data: Data?, _ error: NSError?) -> Void) {
    let session = URLSession.shared

    // Use NSURLSession to get data from an NSURL
    let loadDataTask = session.dataTask(with: url, completionHandler: { (data: Data?, response: URLResponse?, error: NSError?) -> Void in
        if let responseError = error {
            completion(nil, responseError)
        } else if let httpResponse = response as? HTTPURLResponse {
            if httpResponse.statusCode != 200 {
                let statusError = NSError(domain:"Domain", code:httpResponse.statusCode, userInfo:[NSLocalizedDescriptionKey : "HTTP status code has unexpected value."])
                completion(nil, statusError)
            } else {
                completion(data, nil)
            }
        }
    } as! (Data?, URLResponse?, Error?) -> Void)  //Thread1: EXC_BAD_INSTRUCTION (code=EXC_1386_INVOP,subcode=0x0)

    loadDataTask.resume()
}

I'm trying to load data from an url, I don't know why I am getting this error. Thank you.

Don't forced cast, just use the proper syntax, no type annotation in the closure and no type cast at the end:

let loadDataTask = session.dataTask(with: url, completionHandler: { (data, response, error) in
    // code
})