GNU bug report logs - #67568
Emacs master: Bug in byte compiler when there's an unused parameter.

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Package: emacs;

Reported by: Alan Mackenzie <acm <at> muc.de>

Date: Fri, 1 Dec 2023 12:51:01 UTC

Severity: normal

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

Bug is archived. No further changes may be made.

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

From: Alan Mackenzie <acm <at> muc.de>
To: bug-gnu-emacs <at> gnu.org
Subject: Emacs master: Bug in byte compiler when there's an unused parameter.
Date: Fri, 1 Dec 2023 12:49:52 +0000

Hello, Emacs.

On a recent Emacs master:

(i) emacs -Q
(ii) In *scratch* enter the following:

    (byte-compile (lambda (x) "doc" "foo"))

  .
(iii) Enter C-u C-x C-e to evaluate the form.  The result looks like:

    #[257 "\300\207" [nil] 2 "doc

    (fn X)"]

  .  This is incorrect.  The only form in the constants vector is nil.
  It should be "foo".

(iv) Note that this only happens with the unused parameter x.  Without
it, the form compiles correctly.

-- 
Alan Mackenzie (Nuremberg, Germany).
This bug report was last modified 1 year and 226 days ago.

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