RE: Error when applying hunk in Diff buffer

[Marshall, Simon]

> > Or maybe diff-mode should be able to cope with a diff like this:
> > [...]
> > And DTRT?
> 
> Yes, maybe diff-mode could use some heuristic to decide which 
> of the two file names should be used.  Maybe if one of the 
> two is a backup files (with the ~ at the end) or if one of 
> the two is read-only, then the default should be to apply the 
> hunk to the other...
> 
> But to tell you the truth, I think there's already too much 
> heuristic involved in diff-mode's selection of the file, 
> place, and direction of the hunk application.  So it's 
> probably better to get used to telling Emacs what you mean, 
> rather than let Emacs figure out that you meant something 
> else than what you said.

I understand what you're saying from a developer's perspective, but I raised
this as a user from a user's perspective.  I have (AFAIK) always been able
to do C-x v = and C-c C-a (or frequently their menu entries) and emacs
happily DTRT.

Now I find it does not work, barfing about a buffer I didn't open that is
visiting a file I didn't create.  See what I mean?

And there is nothing (even in NEWS---assuming a user would look in it) to
tell me to set vc-stay-local to nil or do C-u C-c C-a (which does not have a
menu-only entry) to make it work.

Simon.