Bug report

In new tests added for #117562 I noticed that os.path.realpath('file1/file2', strict=os.path.ALLOW_MISSING) returns 'file1/file2' when file file1 exist on Windows.

On Posix you will get NotADirectoryError here, but Windows raises ALLOW_MISSING if the intermediate path is a file instead of directory, and it will be ignored with ALLOW_MISSING.

It is expected that if realpath(..., strict=ALLOW_MISSING) does not fail, you can simply create intermediate directories or the final file/directory. At least on Posix. But on Windows it will always fail, because there is already a file here.

cc @encukou