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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: Strange hangs when visiting .el and .html files
Date: Sat, 10 Feb 2024 08:59:02 +0200
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Cc: esr@thyrsus.com, emacs-devel@gnu.org, schwab@suse.de
To: Adam Porter <adam@alphapapa.net>
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In-Reply-To: <1e5dc76b-5e82-4d9c-a1ac-a6104b6b1d03@alphapapa.net> (message
 from Adam Porter on Fri, 9 Feb 2024 12:50:54 -0600)
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> Date: Fri, 9 Feb 2024 12:50:54 -0600
> Cc: emacs-devel@gnu.org, schwab@suse.de
> From: Adam Porter <adam@alphapapa.net>
> 
> > Andreas Schwab <schwab@suse.de>:
> >> On Feb 07 2024, Eric S. Raymond wrote:
> >> 
> >> > About a week ago I noticed that my Emacs was hanging when I attempted
> >> > to visit my init.el file.  Then I saw the same hang when visiting an
> >> > HTML file.  Other modes, such as text and C modes, are working normally.
> >> 
> >> Is it interruptable?  Then you can enable debug-on-quit to see where it
> >> hangs.
> > 
> > I tried that first thing.
> > 
> > Ctl-G after the hang does interrupt it, but doesn't yield a trace.
> > 
> > It's a weird bug because it's so specific. Most Lisp modes are
> > completely unaffected.
> 
> This sounds like a weird behavior that I've observed ever since Emacs 
> 28, but I've never been able to pin it down well enough to file a report 
> about it.

May I suggest that you, too, attach GDB to Emacs when it hangs like
that, and post the backtrace?