Re: Edebug corrupting point in buffers.

[Eli Zaretskii <eliz@gnu.org>]

> Date: Thu, 3 Nov 2022 11:32:29 +0000
> Cc: emacs-devel@gnu.org
> From: Alan Mackenzie <acm@muc.de>
> 
> +@node Edebug Buffer Points
> +@subsubsection Edebug's handling of buffer points
> +
> +When Edebug enters its recursive edit to get a command from the user,
> +by default it saves the window points of each window in the selected
> +frame (@pxref{Edebug Display Update}).  These are usually, but not
> +always, the same as the values of point in the buffers displayed by
> +these windows (@pxref{Window Point}).  On leaving the recursive edit,
> +these window points get restored, but sometimes buffer points get
> +overwritten by them too.
> +
> +This can occasionally be a problem when your program switches buffers
> +and sets point in them.  The recommended workaround is to disable the
> +option @code{edebug-save-windows}, for example with the command
> +@kbd{W} (@pxref{Edebug Options}).
> +
>  @node Edebug Recursive Edit
>  @subsubsection Edebug Recursive Edit
>  
> @@ -1657,6 +1674,11 @@ Edebug Options
>  what happens to the window configurations, it is better to set this
>  variable to @code{nil}.
>  
> +Saving the window configuration can sometimes corrupt the values of
> +point in buffers displayed by these windows.  If this happens, you are
> +recommended to set @code{edebug-save-windos} to @code{nil}.
> +@xref{Edebug Buffer Points}.
> +

The node you added is very short, barely a dozen lines.  It makes
little sense to have it separate from where edebug-save-windows is
described.  So I think you should move it there.  The location of the
node inside the manual's hierarchy is much less important than to have
the information pertaining to edebug-save-windows in a single place,
because no one reads the ELisp reference manual in its entirety.  The
only thing we need to facilitate people finding this place is add good
index entries there.

Thanks.