No problem Phil.
Thanks for looking into this.
On 20 Nov 2015 7:51 am, "Phillip Lord" <phillip.lord@newcastle.ac.uk> wrote:

>
> It is my commit after all. I will work on it as soon as I can. Had a nasty
> cold for the last few days.
>
> Phil
> ________________________________________
> From: emacs-devel-bounces+phillip.lord=newcastle.ac.uk@gnu.org
> [emacs-devel-bounces+phillip.lord=newcastle.ac.uk@gnu.org] on behalf of
> Karl Fogel [kfogel@red-bean.com]
> Sent: 20 November 2015 01:24
> To: Phillip Lord
> Cc: Artur Malabarba; emacs-devel
> Subject: Re: Apparent regression on the undo command
>
> phillip.lord@russet.org.uk (Phillip Lord) writes:
> >Artur Malabarba <bruce.connor.am@gmail.com> writes:
> >> 2015-11-19 9:47 GMT+00:00 Phillip Lord <phillip.lord@russet.org.uk>:
> >>> I'll try and see if I can automate the problem and
> >>> run a bisect.
> >>
> >> The following works for me. When called on the *scratch* buffer it
> >> returns non-nil if the problem occurs.
> >>
> >> (progn
> >>   (kmacro-call-macro nil nil nil [134217788 11 14 14 11 67108911])
> >>   (equal (point-min) (point)))
> >>
> >> That macro simply calls M-< C-k C-n C-n C-k C-/
> >
> >
> >I tried various combinations -- works interactively but fails in batch
> >either because *scratch* hasn't been initialized, or undo appears to
> >work wrongly.
> >
> >No worries, it's easy enough to test by hand, and am doing so.
>
> Any luck?  FWIW I'm noticing the bug too, in emacs-25 branch built from
> commit c210b8b128c.
>
> Best regards,
> -Karl
>
>