Re: Preview: portable dumper

[Eli Zaretskii]

> Date: Sat, 3 Dec 2016 08:14:35 -0800 (PST)
> From: Drew Adams <address@hidden>
> Cc: address@hidden, address@hidden, address@hidden
> 
> > > > Only rarely have we made changes that would prevent this.
> > >
> > > That used to be the case.  Now, nearly every major release is
> > > incompatible, AFAICT.  As far as I can see, long gone are the
> > > days when you could byte-compile in an older version and use
> > > the byte-compiled code in a newer version.
> > 
> > I'm not aware of such problems.  AFAIK, we only made an incompatible
> > change once, in Emacs 23.  The byte-compiled files compiled by later
>                ^^^^^^^^^^^                           ^^^^^^^^^^^^^^^^^
> > versions should all be compatible.  If you see a problem with that,
> > please report it as a bug.
> 
> A change _in_ 23?  Or a change _after_ 23?

The former, AFAIK.

> Are you suggesting that if someone can report a true
> incompatibility introduced after Emacs 23 you will actually
> change the byte compiler to remove it, and that you will
> backport that fix to where it was introduced and later
> releases?  (Otherwise, the fix doesn't really help.)

I don't know, but at least we will know where we stand.