bug#11939: 24.1; `save-buffers-kill-emacs' loses minibuffer focus whenit calls `list-processes'

[Drew Adams]

> I see.  But then where do you see a problem if your function prompts
> with the current buffer for killing?  

In the scenario I described - see my previous descriptions, but here is a
summary of what I did (before):

C-x C-c, reply "no"

C-x k, with the default being *shell* (even though frame *Process List* was on
top and had its title bar highlighted).  Reply "yes" to killing the processes.

C-x k, wanting to kill *Process List* - see previous descriptions for the
problems here.

But in the latest test, where I did only the `redirect-*', the default buffer to
kill was ALWAYS " *Minibuf-0*".  It's not a problem, in the sense that focus is
at least in the minibuffer frame and I can therefore choose not to use the
default.  (In my setup, I automatically have the default inserted in the
minibuffer, but I can easily remove it.)

> Do you ever want to kill the minibuffer's buffer?

No, never.

> If not, your function should provide an
> appropriate workaround default just as `call-interactively' does.

Well OK, I suppose - I can certainly try to do that.

But I have never had to do it before.  Obviously, if the right thing to do is to
work around this hiccup then I can and might try to do that.  And as I said:

>>> Or as a workaround I can explicitly select the frame of the
>>> buffer I want to kill - e.g., click the title bar of frame *shell*.
>>> After I do that, that buffer becomes the default value for C-x k.

But the point was that the minibuffer buffer was the (current-buffer) here,
suggesting to me that the minibuffer frame (and its buffer) was selected.

Is that TRT?  I didn't think so.  I didn't think that just calling `redirect-*'
would/should also select the frame and its buffer.  That is why I said this:

>>> IOW, it seems that not only is the input focus redirected 
>>> to the minibuffer frame, but also the current buffer is
>>> changed to *Minibuf-0*.  And if I do `M-:
>>> (current-buffer)' I do get *Minibuf-0*.  Is it normal for 
>>> frame-focus redirection to change the current buffer also?
>>> That does not seem right to me.

None of that has to do with my `C-x k' command, I believe.  AFAIK, I do not
select the minibuffer frame or buffer.  I speculated that perhaps the C code for
read-from-minibuffer does, but I don't know that.