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bug#36502: Fwd: bug#36502: 27.0.50; infinite loop in file-name-case-inse

From: Eli Zaretskii
Subject: bug#36502: Fwd: bug#36502: 27.0.50; infinite loop in file-name-case-insensitive-p
Date: Fri, 12 Jul 2019 09:41:50 +0300

> From: Richard Stallman <address@hidden>
> Cc: address@hidden, address@hidden, address@hidden,
>       address@hidden, address@hidden,
>       address@hidden
> 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

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