bug#40992: 27.0.90; Evaluating a function while using edebug breaks

[Eli Zaretskii]

> Date: Sat, 2 May 2020 13:34:47 +0000
> Cc: Noam Postavsky <npostavs@gmail.com>, larsi@gnus.org,
>   40992@debbugs.gnu.org, phillip.lord@russet.org.uk
> From: Alan Mackenzie <acm@muc.de>
> 
> Noam's fix, I think, will either leave stale highlights on what used to
> be breakpoints, or won't leave the highlights active whilst the
> debugging is still in progress.  It might be the least bad fix, though.

If Noam's fix is incomplete, I still think reverting the feature on
emacs-27 is a better solution.  We should continue working on this on
master until we find a better solution.