Re: A new(?) warning of erase-buffer, which was not seen before.

[Lennart Borgman (gmail)]

Stefan Monnier wrote:
> > > > > I've been working on some patches to comint to do this, by selectively
> > > > > disabling undo at various points, but it's not entirely straight-forward
> > > > > because you then have to fix up the undo list to account for the
> > > > > unrecorded buffer changes.
> > > > FWIW, erc.el does this kind of selective undo.
> > > How does it deal with changing buffer locations?
>
> > Nicely.
>
> > > My attempted solution was to scan through buffer-undo-list, updating
> > > those position, every time I inserted some "hidden from undo" text.
> > > [This isn't typically a performance problem because _usually_
> > > buffer-undo-list is nil when process output is occuring.]
>
> > That's exactly what ERC does.  See erc-update-undo-list.
>
> I.e. we should probably add a "insert-without-undo" function which does
> just that.

Yes, please. And also an delete-without-undo.