GNU bug report logs - #30823
25.3; modification-hooks of overlays are not run in some cases

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Package: emacs;

Reported by: Ren Victor <victorhge <at> gmail.com>

Date: Thu, 15 Mar 2018 04:17:02 UTC

Severity: normal

Tags: fixed, patch

Found in version 25.3

Fixed in version 26.2

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

Bug is archived. No further changes may be made.

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Message #25 received at 30823 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> IRO.UMontreal.CA>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: victorhge <at> gmail.com, Noam Postavsky <npostavs <at> gmail.com>,
 30823 <at> debbugs.gnu.org
Subject: Re: bug#30823: 25.3;
 modification-hooks of overlays are not run in some cases
Date: Sat, 18 Aug 2018 23:48:02 -0400

> Can we turn the table and ask whether it makes sense to delete an
> overlay from the modification hooks of that same overlay?

Yes, it very much does make sense: e.g. you want to keep track of
a "region unmodified" status, so you place an overlay over that region
with a modification hook that sets a variable to nil to indicate that
the region was modified, and once that is done there's no point in
keeping the overlay any more so you can delete it immediately from that
modification-hook.


        Stefan
This bug report was last modified 6 years and 309 days ago.

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