On 7/12/2019 2:41 AM, Eli Zaretskii wrote:
>> From: Richard Stallman <rms@gnu.org>
>> Cc: eliz@gnu.org, dan@dpsutton.com, npostavs@gmail.com,
>> 	36502@debbugs.gnu.org, monnier@iro.umontreal.ca,
>> 	schwab@suse.de
>> Date: Thu, 11 Jul 2019 19:36:38 -0400
>>
>>    > (let ((default-directory "~foo"))
>>    >    (expand-file-name "bar"))
>>    > => "~foo/~foo/bar"
>>
>> That is not right, but I think "~foo/bar" would be right.
> 
> No, I think this should yield an absolute file name starting with a
> slash (on Posix systems).
> 
>>    > Part of what's confusing here is that file-name-absolute-p returns
>>    > t on file names starting with "~", even though its doc string
>>    > explicitly states that such a file name is not absolute.
>>
>> This contradiction is not good.  But I would like to point out
>> that, in a certain sesne, a name starting with ~ is absolute.
>> It is not relative to the current directory.
> 
> It is only absolute if what follows ~ is a slash or a name of an
> existing user.  I think we should fix the inconsistency in that
> direction.

Patch attached.

Ken