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realpath(..., strict=ALLOW_MISSING) can unexpectedly succeed on Windows #135122

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@serhiy-storchaka

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@serhiy-storchaka

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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

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    3.13bugs and security fixes3.14bugs and security fixes3.15new features, bugs and security fixesOS-windowsextension-modulesC modules in the Modules dirtype-bugAn unexpected behavior, bug, or error

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