GNU bug report logs - #31635
mapcon hangs emacs 24.5.1 of debian

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Package: emacs;

Reported by: Dave Goel <deego3 <at> gmail.com>

Date: Tue, 29 May 2018 07:42:02 UTC

Severity: normal

Tags: fixed

Fixed in version 26.1

Done: Noam Postavsky <npostavs <at> gmail.com>

Bug is archived. No further changes may be made.

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Report forwarded to bug-gnu-emacs <at> gnu.org:
bug#31635; Package emacs. (Tue, 29 May 2018 07:42:02 GMT) Full text and rfc822 format available.
Acknowledgement sent to Dave Goel <deego3 <at> gmail.com>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs <at> gnu.org. (Tue, 29 May 2018 07:42:02 GMT) Full text and rfc822 format available.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Dave Goel <deego3 <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org, Dave Goel <deego3 <at> gmail.com>
Subject: mapcon hangs emacs 24.5.1 of debian
Date: Mon, 28 May 2018 19:33:04 -0400

[Message part 1 (text/plain, inline)]
(require 'cl)

(mapcon 'identity (list nil nil nil)) => hangs


(emacs-version)

"GNU Emacs 24.5.1 (x86_64-pc-linux-gnu, GTK+ Version 3.22.11)
 of 2017-09-12 on hullmann, modified by Debian"

[Message part 2 (text/html, inline)]
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#31635; Package emacs. (Tue, 29 May 2018 07:56:02 GMT) Full text and rfc822 format available.

Message #8 received at 31635 <at> debbugs.gnu.org (full text, mbox):

From: Andreas Schwab <schwab <at> linux-m68k.org>
To: Dave Goel <deego3 <at> gmail.com>
Cc: 31635 <at> debbugs.gnu.org
Subject: Re: bug#31635: mapcon hangs emacs 24.5.1 of debian
Date: Tue, 29 May 2018 09:55:51 +0200

On Mai 28 2018, Dave Goel <deego3 <at> gmail.com> wrote:

> (require 'cl)
>
> (mapcon 'identity (list nil nil nil)) => hangs

With 26.1, this now produces an error:

ELISP> (mapcon 'identity (list nil nil nil))
*** Eval error ***  List contains a loop: (nil nil nil . #1)

Andreas.

-- 
Andreas Schwab, schwab <at> linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
"And now for something completely different."
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#31635; Package emacs. (Tue, 29 May 2018 07:57:01 GMT) Full text and rfc822 format available.

Message #11 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Dave Goel <deego3 <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org, Dave Goel <deego3 <at> gmail.com>
Subject: Re: mapcon hangs emacs 24.5.1 of debian
Date: Mon, 28 May 2018 19:45:28 -0400

[Message part 1 (text/plain, inline)]
Per kenzo of #emacs, bug also exists in build 27 on a mac


On Mon, May 28, 2018 at 7:33 PM, Dave Goel <deego3 <at> gmail.com> wrote:

> (require 'cl)
>
> (mapcon 'identity (list nil nil nil)) => hangs
>
>
> (emacs-version)
>
> "GNU Emacs 24.5.1 (x86_64-pc-linux-gnu, GTK+ Version 3.22.11)
>  of 2017-09-12 on hullmann, modified by Debian"
>
>
>
>

[Message part 2 (text/html, inline)]
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#31635; Package emacs. (Tue, 29 May 2018 11:19:02 GMT) Full text and rfc822 format available.

Message #14 received at 31635 <at> debbugs.gnu.org (full text, mbox):

From: Noam Postavsky <npostavs <at> gmail.com>
To: Dave Goel <deego3 <at> gmail.com>
Cc: 31635 <at> debbugs.gnu.org
Subject: Re: bug#31635: mapcon hangs emacs 24.5.1 of debian
Date: Tue, 29 May 2018 07:18:05 -0400

Dave Goel <deego3 <at> gmail.com> writes:

> Per kenzo of #emacs, bug also exists in build 27 on a mac

On my build of master I don't get a hang, I get this error:

Debugger entered--Lisp error: (circular-list (nil nil . #2))
  nconc((nil nil nil . #2) (nil nil . #2) (nil nil . #3))
  apply(nconc ((nil nil nil . #4) (nil nil . #4) (nil nil . #5)))
  mapcon(identity (nil nil nil . #3))

On 26.1 the debugger hangs when trying to print this though (that is
Bug#31146).
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#31635; Package emacs. (Mon, 04 Jun 2018 10:38:02 GMT) Full text and rfc822 format available.

Message #17 received at 31635 <at> debbugs.gnu.org (full text, mbox):

From: Noam Postavsky <npostavs <at> gmail.com>
To: Dave Goel <deego3 <at> gmail.com>
Cc: 31635 <at> debbugs.gnu.org
Subject: Re: bug#31635: mapcon hangs emacs 24.5.1 of debian
Date: Mon, 04 Jun 2018 06:37:25 -0400

tags 31635 fixed
close 31635 26.1
quit

Noam Postavsky <npostavs <at> gmail.com> writes:

> Dave Goel <deego3 <at> gmail.com> writes:
>
>> Per kenzo of #emacs, bug also exists in build 27 on a mac
>
> On my build of master I don't get a hang, I get this error:
>
> Debugger entered--Lisp error: (circular-list (nil nil . #2))
>   nconc((nil nil nil . #2) (nil nil . #2) (nil nil . #3))
>   apply(nconc ((nil nil nil . #4) (nil nil . #4) (nil nil . #5)))
>   mapcon(identity (nil nil nil . #3))
>
> On 26.1 the debugger hangs when trying to print this though (that is
> Bug#31146).

I'm therefore closing this report.
Added tag(s) fixed. Request was from Noam Postavsky <npostavs <at> gmail.com> to control <at> debbugs.gnu.org. (Mon, 04 Jun 2018 10:38:02 GMT) Full text and rfc822 format available.
bug marked as fixed in version 26.1, send any further explanations to 31635 <at> debbugs.gnu.org and Dave Goel <deego3 <at> gmail.com> Request was from Noam Postavsky <npostavs <at> gmail.com> to control <at> debbugs.gnu.org. (Mon, 04 Jun 2018 10:38:03 GMT) Full text and rfc822 format available.
bug archived. Request was from Debbugs Internal Request <help-debbugs <at> gnu.org> to internal_control <at> debbugs.gnu.org. (Mon, 02 Jul 2018 11:24:04 GMT) Full text and rfc822 format available.
This bug report was last modified 6 years and 357 days ago.

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