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bug#16711: 24.3.50; Error: pre-redisplay-function

From: Stefan Monnier
Subject: bug#16711: 24.3.50; Error: pre-redisplay-function
Date: Wed, 18 Nov 2020 11:59:59 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux)

> Possible -- though I am not sure. Note -- at the time I reported
> this, eww wasn't the only  thing that caused it -- it just
> tickled it a lot more. 

Indeed, AFAIK the `pre-redisplay-function` doesn't run any code from EWW
(nor from Emacspeak), so the problem is likely elsewhere.

If you can still reproduce the problem, the best course of action might
be to go to GDB (from outside that Emacs session), attach to the Emacs
session and set a break point in `maybe_call_debugger` and then look at
the Lisp backtrace with `xbt`.


>>>>>> "Lars" == Lars Ingebrigtsen <larsi@gnus.org> writes:
>     Lars> "T. V. Raman" <tv.raman.tv@gmail.com> writes:
>     >> Lars, Starting from emacs -q is well-nigh impossible for
>     >> me -- as the Emacspeak Press Release says --"Once
>     >> Emacspeak is uninstalled, the user stops functioning
>     >> altogether"
>     Lars> 
>     Lars> Yeah, I can see how that would be a problem. :-)
>     Lars> 
>     Lars> eww does some funky stuff in `after-change-functions'
>     Lars> -- could that be interfering with something in
>     Lars> Emacspeak, perhaps?
>     Lars> 
>     Lars> -- (domestic pets only, the antidote for overdose,
>     Lars> milk.) bloggy blog: http://lars.ingebrigtsen.no

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