bug#25949: 26.0.50; process-file fails when visiting a file with a quoted file name

[Philipp Stephani <p.stephani2@gmail.com>]

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Michael Albinus <michael.albinus@gmx.de> schrieb am Fr., 3. März 2017 um
20:31 Uhr:

> Philipp Stephani <p.stephani2@gmail.com> writes:
>
> Hi Philippe,
>
> >     emacs -Q
> >     C-x C-f /:/tmp/foobar.txt (it doesn't matter whether the file
> >     exists)
> >     M-: (process-file "true")
> >
> >     will result in an error
>
> There are other functions which behave similar wrong:
>
> M-: (start-file-process "foo" (current-buffer) "true")
> M-: (shell-command "true")
>
> > +          ;; Some operations respect file name handlers in
> > +          ;; `default-directory'.  Because core function like
> > +          ;; `call-process' don't care about file name handlers in
> > +          ;; `default-directory', we here have to resolve the
> > +          ;; directory into a local one.  For `process-file', this
> > +          ;; fixes Bug#25949.
> > +       (if (memq operation '(insert-directory process-file))
>
> Maybe you could add them here (not tested).
>

Added and pushed as 604eb02fff to master.

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