bug#46908: 28.0.50; Dozens of spurious markers in buffer-undo-list

[Michael Heerdegen]

martin rudalics <rudalics@gmx.at> writes:

> When I read the discussion on emacs-help I tried with `buffer-undo-list'
> nil and doing some window modifications but didn't find a smoking gun.

AFAIK window modifications are not necessary to reproduce the issue,
probably they are completely unrelated.

Did you try to reproduce the issue with the recipe?  It is complete.

> So I'm afraid you have to look into your undo lists more closely to find
> out whether some `with-silent-modifications' are missing.  Maybe
> 'winner-mode' and its window configuration and active region handling
> can give a clue.

Sorry for the confusion: We did not turn winner-mode on in the recipe,
please just ignore that part of the discussion, that was a false lead.
You just need insert and undo to reproduce.  Please try.  emacs -Q, just
editing commands plus undo produce the zombi markers.

Regards,

Michael.