GNU bug report logs - #60974
30.0.50; byte-compile-preprocess mutates self evaluating forms in expanded macro bodies

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Package: emacs;

Reported by: Vibhav Pant <vibhavp <at> gmail.com>

Date: Fri, 20 Jan 2023 21:25:01 UTC

Severity: normal

Found in version 30.0.50

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From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Vibhav Pant <vibhavp <at> gmail.com>
Cc: 60974 <at> debbugs.gnu.org, emacs-devel <emacs-devel <at> gnu.org>
Subject: bug#60974: 30.0.50; byte-compile-preprocess mutates self evaluating forms in expanded macro bodies
Date: Sat, 21 Jan 2023 00:43:31 -0500

> The attached patch should fix this, thoughts?

It's not really an option:
- it's expensive
- it breaks code when it doesn't form a tree, e.g.

      (list '#1=(a b #1#) 'c 'd)

Instead, we need to find out where in the code we perform the
side effect and change just that part.


        Stefan
This bug report was last modified 2 years and 189 days ago.

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