title: gsutil cp file upload is successful but gcloud log flags an error
body: <p>I'm in the process of uploading files from a VM to CLoud Storage.
  use command line:
  gsutil cp file.csv gs://xxxx/xxxxx/</p>
  <p>My file has been uploaded successfully. The content of the log is completed. however Severity marked as error.
  So is this a bug or not? if it is an error then how to fix this error?
  <a href="https://i.stack.imgur.com/HABkF.png" rel="nofollow noreferrer">enter image description here</a></p>