GNU bug report logs - #25929
25.2; map-delete doesn't delete permanently 1st alist elt

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Package: emacs;

Reported by: Tino Calancha <tino.calancha <at> gmail.com>

Date: Thu, 2 Mar 2017 07:19:01 UTC

Severity: normal

Found in version 25.2

Fixed in version 29.1

Done: Lars Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

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From: Tino Calancha <tino.calancha <at> gmail.com>
To: 25929 <at> debbugs.gnu.org
Cc: tino.calancha <at> gmail.com, <nicolas <at> petton.fr>
Subject: bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt
Date: Thu, 02 Mar 2017 16:17:57 +0900

X-Debbugs-CC: <nicolas <at> petton.fr>

(cl-loop for i below 3 collect
  (let ((map (list (cons 0 3)
                   (cons 1 4)
                   (cons 2 5))))
    (map-delete map i)
    (null (map-elt map i))))
=> (nil t t) ; The first pair, i.e. '(0 . 3) is not permanently deleted.

I've used the word 'permantly' because it seems it is temporary
deleted:

(cl-loop for i below 3 collect
  (let ((map (list (cons 0 3)
                   (cons 1 4)
                   (cons 2 5))))
    (null (map-elt
           (map-delete map i)
           i))))
=> (t t t)

*) It happens just for alist, other maps are fine.
*) The test suite doesn't detect this issue because `test-map-delete'
   happen to delete just the 2rd element of the maps.

In GNU Emacs 25.2.3 (x86_64-pc-linux-gnu, GTK+ Version 3.22.7)
 of 2017-03-02
Repository revision: 640661838dbba8185990e839712c91a14641ddf3
This bug report was last modified 3 years and 27 days ago.

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