MSLargeFileUploadTask crashes when uploading a large file and the Internet connection disappears

[anton-simakov]

MSLargeFileUploadTask crashes when uploading a large file and the Internet connection disappears.

Steps to reproduce:

1. Start an upload of a large file using MSLargeFileUploadTask
2. Disconnect from the internet

Result

The library crashes in

- (void)uploadNextSegmentWithCompletion:(HTTPRequestCompletionHandler)completionHandler
{
    [...]
    NSDictionary *dataDict = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil]; // (line 76)
    [...]
}

Reason

data is nil.