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bug#26272: default-directory: Remark that it must be a directory name


From: Tino Calancha
Subject: bug#26272: default-directory: Remark that it must be a directory name
Date: Tue, 28 Mar 2017 10:54:36 +0900 (JST)
User-agent: Alpine 2.20 (DEB 67 2015-01-07)



On Mon, 27 Mar 2017, Noam Postavsky wrote:

On Mon, Mar 27, 2017 at 2:26 PM, Eli Zaretskii <address@hidden> wrote:
From: Noam Postavsky <address@hidden>
Date: Mon, 27 Mar 2017 11:52:21 -0400
Cc: Tino Calancha <address@hidden>, address@hidden

Didn't we discuss that at some point in the past?
I don't remember it.  Maybe with another person.

No, I meant on emacs-devel, not with you personally.

This one maybe? (it's about load-path though)
https://lists.gnu.org/archive/html/emacs-devel/2015-10/msg02060.html

Yes, but AFAIR it also touched default-directory.

Ah, it seems that code was fixed to be more tolerant: the trailing
slash in default-directory used to matter for executing processes, but
not any more: 
https://lists.gnu.org/archive/html/emacs-devel/2015-10/msg02367.html
Following is not the same but slightly related:
emacs -Q /tmp

I) OK
M-x cd RET /tmp/ RET
M-: (default-directory) RET
=> "/tmp/"

II) OK
M-x cd RET /tmp RET
M-: (default-directory) RET
=> "/tmp/"

III) Wrong
M-x cd RET /tmp// RET
M-: (default-directory) RET
=> "/"

;; Just an issue on interactive calls, as you can see:
M-: (mapcar
     (lambda (x)
       (progn (cd x) default-directory))
     '("/tmp/" "/tmp" "/tmp//")) RET
=> ("/tmp/" "/tmp/" "/tmp/")






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