GNU bug report logs - #21716
25.0.50; highlight-regexp gets confused when the highlighted text is pasted

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Package: emacs;

Reported by: Dima Kogan <dima <at> secretsauce.net>

Date: Tue, 20 Oct 2015 06:14:02 UTC

Severity: minor

Found in version 25.0.50

Done: Lars Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

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Report forwarded to bug-gnu-emacs <at> gnu.org:
bug#21716; Package emacs. (Tue, 20 Oct 2015 06:14:02 GMT) Full text and rfc822 format available.

Acknowledgement sent to Dima Kogan <dima <at> secretsauce.net>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs <at> gnu.org. (Tue, 20 Oct 2015 06:14:02 GMT) Full text and rfc822 format available.

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

From: Dima Kogan <dima <at> secretsauce.net>
To: bug-gnu-emacs <at> gnu.org
Subject: 25.0.50;
 highlight-regexp gets confused when the highlighted text is pasted
Date: Mon, 19 Oct 2015 23:13:19 -0700
Hi. I'm running a recent build of emacs: 

  https://github.com/emacs-mirror/emacs/commit/ce402dd

and I'm observing highlight-regexp get confused some times. Recipe:

1. emacs -Q

2. open or type a tiny .c source file such as:
=====================
int main(void)
{

}
=====================

3. mark 'main' and M-w

4. highlight 'main': M-s h r main, accept default face

5. yank on the empty line between {}. I expect the yanked text 'main' to
be highlighted. Instead I sometimes see "mai" being highlighted but not
the "n"; at other times I see nothing highlighted, but "mai" being
rendered with a different face than the "n". In any case, it's never
highlighted correctly.




Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#21716; Package emacs. (Tue, 20 Oct 2015 15:23:01 GMT) Full text and rfc822 format available.

Message #8 received at 21716 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Dima Kogan <dima <at> secretsauce.net>
Cc: 21716 <at> debbugs.gnu.org
Subject: Re: bug#21716: 25.0.50;
 highlight-regexp gets confused when the highlighted text is pasted
Date: Tue, 20 Oct 2015 18:22:05 +0300
> From: Dima Kogan <dima <at> secretsauce.net>
> Date: Mon, 19 Oct 2015 23:13:19 -0700
> 
> 1. emacs -Q
> 
> 2. open or type a tiny .c source file such as:
> =====================
> int main(void)
> {
> 
> }
> =====================
> 
> 3. mark 'main' and M-w
> 
> 4. highlight 'main': M-s h r main, accept default face
> 
> 5. yank on the empty line between {}. I expect the yanked text 'main' to
> be highlighted. Instead I sometimes see "mai" being highlighted but not
> the "n"; at other times I see nothing highlighted, but "mai" being
> rendered with a different face than the "n". In any case, it's never
> highlighted correctly.

What I see here is that the moment 'main' becomes a complete C symbol,
like if I type a ';' or a '(' after yanking it, "main" becomes
highlighted exactly as expected.  So maybe this is a feature?

I do see that Emacs 24.5 highlighted "main" as soon as it was yanked,
so this is at least a change in behavior.




Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#21716; Package emacs. (Wed, 26 May 2021 22:30:01 GMT) Full text and rfc822 format available.

Message #11 received at 21716 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Dima Kogan <dima <at> secretsauce.net>
Cc: 21716 <at> debbugs.gnu.org
Subject: Re: bug#21716: 25.0.50; highlight-regexp gets confused when the
 highlighted text is pasted
Date: Thu, 27 May 2021 00:29:37 +0200
[Message part 1 (text/plain, inline)]
Dima Kogan <dima <at> secretsauce.net> writes:

> 2. open or type a tiny .c source file such as:
> =====================
> int main(void)
> {
>
> }
> =====================
>
> 3. mark 'main' and M-w
>
> 4. highlight 'main': M-s h r main, accept default face
>
> 5. yank on the empty line between {}. I expect the yanked text 'main' to
> be highlighted. Instead I sometimes see "mai" being highlighted but not
> the "n"; at other times I see nothing highlighted, but "mai" being
> rendered with a different face than the "n". In any case, it's never
> highlighted correctly.

I've tried the recipe in Emacs 28, and this seems to work better now:

[Message part 2 (image/png, inline)]
[Message part 3 (text/plain, inline)]
So I'm going to go ahead and guess that this has been fixed in the five
years since this was reported, and I'm closing this bug report.  If you
can still see the bug, please respond to the debbugs address and we'll
reopen.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug closed, send any further explanations to 21716 <at> debbugs.gnu.org and Dima Kogan <dima <at> secretsauce.net> Request was from Lars Ingebrigtsen <larsi <at> gnus.org> to control <at> debbugs.gnu.org. (Wed, 26 May 2021 22:30:03 GMT) Full text and rfc822 format available.

Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#21716; Package emacs. (Wed, 26 May 2021 23:03:01 GMT) Full text and rfc822 format available.

Message #16 received at 21716 <at> debbugs.gnu.org (full text, mbox):

From: Dima Kogan <dima <at> secretsauce.net>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 21716 <at> debbugs.gnu.org
Subject: Re: bug#21716: 25.0.50; highlight-regexp gets confused when the
 highlighted text is pasted
Date: Wed, 26 May 2021 16:02:48 -0700
Yeah, it appears to work now. Thanks much for going through the old
reports.




bug archived. Request was from Debbugs Internal Request <help-debbugs <at> gnu.org> to internal_control <at> debbugs.gnu.org. (Thu, 24 Jun 2021 11:24:05 GMT) Full text and rfc822 format available.

This bug report was last modified 2 years and 277 days ago.

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