GNU bug report logs - #17628
Strange output from C-x v =

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Message #8 received at 17628 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: rms <at> gnu.org
Cc: 17628 <at> debbugs.gnu.org
Subject: Re: bug#17628: Strange output from C-x v =
Date: Thu, 29 May 2014 12:20:13 -0400

Richard Stallman wrote:

> changes shown below.  The strangeness is, why does it output
> "No changes between working revision and workfile." before
> showing the differences between them?

It doesn't do that for me.
Looking at vc-diff-internal shows that message comes from:

    (if (and (zerop (buffer-size))
             (not (get-buffer-process (current-buffer))))
        ;; Treat this case specially so as not to pop the buffer.
        (progn
          (message "%s" (cdr messages))
          nil)

so I'm going to guess that this is just a manifestation of the same
process-handling-related issue you have been seeing with epg.
Emacs mistakenly thinks the process has exited before it has had a
chance to return anything.

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