bug#25183: 26.0.50; expanding quoted file name on w32

[Glenn Morris]

Noam Postavsky wrote:

>>>> (expand-file-name "/:~/path/./file")
>>>> => "/:~/path/file"
>
>>>> (expand-file-name "/:~/path/./file")
>>>> => "/:c:/Users/lb01177/AppData/Roaming/path/file"
>
>>
>> (file-name-absolute-p "/:~/path/./file")
>> => t
>
> I think all these cases are user error, `(emacs) Quoted File Names' says
>
>     You can "quote" an absolute file name [...] add '/:' at the beginning
>
> But you cannot quote a relative file name, which looks like what
> you're trying to do here. It might better to throw an error than
> return nonsense (though possibly not worth the trouble).

But "~/blah" is an absolute file name. ?