GNU bug report logs - #31688
26.1.50; Byte compiler confuses two string variables

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Package: emacs;

Reported by: Gemini Lasswell <gazally <at> runbox.com>

Date: Sat, 2 Jun 2018 17:53:01 UTC

Severity: normal

Tags: notabug

Found in version 26.1.50

Done: Eli Zaretskii <eliz <at> gnu.org>

Bug is archived. No further changes may be made.

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Message #11 received at 31688 <at> debbugs.gnu.org (full text, mbox):

From: Gemini Lasswell <gazally <at> runbox.com>
To: Noam Postavsky <npostavs <at> gmail.com>
Cc: 31688 <at> debbugs.gnu.org
Subject: Re: bug#31688: 26.1.50; Byte compiler confuses two string variables
Date: Sat, 02 Jun 2018 15:52:39 -0700

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

> I don't think this is a bug, the compiler coalesces equal string
> literals.  `put-text-property' modifies the string destructively, so you
> shouldn't use it on literals, for the same reason you shouldn't use
> destructive operations on quoted list literals.

Thanks for the explanation. I've just searched the Elisp reference
looking for any any warnings not to use destructive functions on
literals, and didn't find anything. Did I miss it? If not, it seems to
me that the node "Self-Evaluating Forms" would be a good place to
discuss the subject.
This bug report was last modified 7 years and 67 days ago.

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