GNU bug report logs - #72692
Emacs 31.05 (40eecd594ac) get SIGSEGV on Linux (Linux 6.6.45 Kde Wayland)

Previous Next

Full log

View this message in rfc822 format

From: Eli Zaretskii <eliz <at> gnu.org>
To: Juri Linkov <juri <at> linkov.net>
Cc: pipcet <at> protonmail.com, execvy <at> gmail.com, 72692 <at> debbugs.gnu.org
Subject: bug#72692: Emacs 31.05 (40eecd594ac) get SIGSEGV on Linux (Linux 6.6.45 Kde Wayland)
Date: Wed, 28 Aug 2024 20:53:28 +0300

> From: Juri Linkov <juri <at> linkov.net>
> Cc: pipcet <at> protonmail.com,  execvy <at> gmail.com,  72692 <at> debbugs.gnu.org
> Date: Wed, 28 Aug 2024 19:21:08 +0300
> 
> >> > I see Eli reverted the change, which makes sense for now.  We'll have to
> >> > find another way to fix this, I think.
> >> 
> >> I'm ready to test any changes when you'll find another way to fix this.
> >
> > Thanks, please test the patch below.  If it doesn't adversely affect
> > performance, I will install it.
> 
> With the previous change, when leaning on an arrow key, cursor motion
> was visibly laggy since the cursor skipped 3-4 characters.
> 
> Now with this patch, the cursor visits every character without delays.

Thanks, this is good news.

> OTOH, I tried to set a breakpoint inside 'if (non_basic_faces_cached)',
> and it's never visited.  So it seems this change has no effect
> in normal circumstances.

I suggest to try Pip's recipe from

  https://debbugs.gnu.org/cgi/bugreport.cgi?bug=72692#133

(but without patching the C sources).

But yes, in normal circumstances this is not needed, as AFAIU the
problem happens under rare conditions.  (Otherwise, we'd have
face-related crashes all over the place.)  The challenge was to find a
solution that doesn't make the normal cases more expensive, and still
manages to catch those where this is needed.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.