GNU bug report logs - #27016
possible bug in `defsetf'

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Package: emacs;

Reported by: Rafael D Sorkin <rsorkin <at> perimeterinstitute.ca>

Date: Mon, 22 May 2017 06:40:01 UTC

Severity: minor

Tags: fixed, patch

Found in versions 24.4, 25.2

Fixed in version 26.1

Done: npostavs <at> users.sourceforge.net

Bug is archived. No further changes may be made.

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From: npostavs <at> users.sourceforge.net
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 27016 <at> debbugs.gnu.org, Rafael D Sorkin <rsorkin <at> perimeterinstitute.ca>
Subject: bug#27016: possible bug in `defsetf'
Date: Sun, 02 Jul 2017 16:47:36 -0400

Stefan Monnier <monnier <at> iro.umontreal.ca> writes:

>> Is the difference in Emacs-23 not just eager macroexpansion?
>
> Could be.  But I'm more worried about the byte-compiled case.

I hope someone will correct me if I've gotten mixed up again, but I
believe the byte-compiled case already works fine:

    ~/src/emacs$ cat bug-27016-defsetf.el
    (require 'cl)

    (defvar pair nil)
    (setq pair (cons 3 4))
    (when nil
      (defalias 'foobar 'cons)
      (defsetf foobar setcar))
    ~/src/emacs$ emacs -Q -batch -f batch-byte-compile bug-27016-defsetf.el

    In toplevel form:
    bug-27016-defsetf.el:1:1:Warning: cl package required at runtime
    bug-27016-defsetf.el:3:1:Warning: global/dynamic var ‘pair’ lacks a prefix
    ~/src/emacs$ emacs -Q -batch -l bug-27016-defsetf.elc --eval '(setf (foobar pair) 0)'
    Symbol’s function definition is void: \(setf\ foobar\)
This bug report was last modified 7 years and 290 days ago.

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