GNU bug report logs - #63283
Emacs crash within fontset

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#63283: closed (Emacs crash within fontset)
Date: Tue, 09 May 2023 05:26:02 +0000

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Your message dated Tue, 09 May 2023 08:26:02 +0300
with message-id <83o7muaxed.fsf <at> gnu.org>
and subject line Re: bug#63283: Emacs crash within fontset
has caused the debbugs.gnu.org bug report #63283,
regarding Emacs crash within fontset
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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63283: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=63283
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From: Seppo Ronkainen <sodr80 <at> protonmail.com>
To: bug-gnu-emacs <bug-gnu-emacs <at> gnu.org>
Subject: Emacs crash within fontset
Date: Thu, 04 May 2023 19:04:48 +0000

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Honorable GNU developers !

For some reason the new Emacs 29.0.90 did not build at work the other day unless I provided configuration option --without-all (I plan to look into why later but that is not why I am writing this report now).

When I experimented with Emacs (29.0.90 --without-all) I noticed a crash defect that was easy to reproduce. It seemed to have with fonts to do. I have noticed the same problem both at work CentOS 7.9 and at home (currently on a raspberry pi 4) not that it matters but anyhow several machines / architectures. The problem seemed non-present when I built Emacs without configuration option --without-all

I attach details about my findings in an org file, hope it helps

Live long and prosper

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Seppo Ronkainen <sodr80 <at> protonmail.com>
Cc: 63283-done <at> debbugs.gnu.org
Subject: Re: bug#63283: Emacs crash within fontset
Date: Tue, 09 May 2023 08:26:02 +0300

> Date: Mon, 08 May 2023 21:22:21 +0000
> From: Seppo Ronkainen <sodr80 <at> protonmail.com>
> Cc: 63283 <at> debbugs.gnu.org
> 
> Your suggested patch successfully avoided the abort, great !
> 
> Where the abort would previously occur now instead the buffer renders all characters with four digit code point rectangular representations which I would consider preferable to an abort the entire emacs server session with thirty or so windows. Tested with visiting a large file emacs/src/xdisp.c and Emacs swapps back to render regular characters when text is scaled back. I would vote for your suggested fix, well done thank you !

Displaying the characters as hex codes is the expected behavior in
this case, since Emacs is unable to find a font that suits its needs.

So I've now installed the change on the emacs-29 branch, and I'm
closing the bug.

Thanks.

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