Unable to open file after renaming

I created a temporary file and renamed it with following statements:

tmp, err := ioutil.TempFile(".", "tmpInter")

, but the permissions on the file changed, as shown in the figure:

This prevented me from opening the file again.
What’s wrong with my program and how can I get it right?

I’m not sure if this is relevant or not, but you’re renaming the file while it’s still open. That might not be the issue, but I would recommend:

  1. Close the file returned by ioutil.TempFile before attempting to rename it, or at least close it at some point by calling its Close method.
  2. Don’t discard errors! Maybe ioutil.TempFile is returning an error; maybe os.Rename is.
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