Copy a file to itself will remove the file

[AntonFagerberg]

If a file is copied to itself, it will remove the file and state that the file does not exist. The expected result should (probably) be that the file is preserved as is.

iex(1)> File.ls!
[]
iex(2)> File.write!("test_file", ":)")
:ok
iex(3)> File.ls!
["test_file"]
iex(4)> File.cp("test_file", "test_file")
{:error, :enoent}
iex(5)> File.ls!
[]

[josevalim]

Thanks for the report.