GNU bug report logs - #27674
26.0.50; cl-progv: strange scoping due to implementation

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Package: emacs;

Reported by: Michael Heerdegen <michael_heerdegen <at> web.de>

Date: Wed, 12 Jul 2017 21:54:02 UTC

Severity: normal

Tags: notabug, wontfix

Found in version 26.0.50

Done: npostavs <at> users.sourceforge.net

Bug is archived. No further changes may be made.

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From: Michael Heerdegen <michael_heerdegen <at> web.de>
To: 27674 <at> debbugs.gnu.org
Subject: bug#27674: 26.0.50; cl-progv: strange scoping due to implementation
Date: Wed, 12 Jul 2017 23:53:01 +0200

Hello,

The way `cl-progv' is implemented, we have some strange effects
happening to closures in the body.  For example, with lexical-binding
on,

(let ((x 0))
  (cl-progv (list 'x) (list 1)
    (funcall (lambda () x))))

yields 0, and

(cl-progv (list 'x) (list 1)
  (funcall (lambda () x)))

yields 1.  That isn't consistent (FWIW I would expect `1' in both
cases).


TIA,

Michael.



In GNU Emacs 26.0.50 (build 7, x86_64-pc-linux-gnu, GTK+ Version 3.22.16)
 of 2017-07-12 built on drachen
Repository revision: dde7f2d48b53996bdf767a8cf91aafc2e10add23
Windowing system distributor 'The X.Org Foundation', version 11.0.11903000
System Description:	Debian GNU/Linux testing (buster)
This bug report was last modified 8 years and 1 day ago.

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