bug#56712: 29.0.50; x-dnd-tests-do-direct-save fails on Cygwin

[Ken Brown]

On 7/24/2022 9:02 PM, Po Lu wrote:
> Ken Brown <kbrown@cornell.edu> writes:
>
> > On 7/24/2022 9:33 AM, Po Lu wrote:
> > > Now done.  Ken, could you please re-run the test and show the detailed
> > > error that is signalled?
> >
> > Thanks.  The error is now clear:
> >
> > Test x-dnd-tests-do-direct-save condition:
> >      (file-missing "Opening output file" "No such file or directory"
> >      "//tmp/x-dnd-testvZQUCZ/x-dnd-test-targetKiqqPT")
> >
> > According to POSIX, the meaning of exactly 2 slashes at the beginning
> > of a path name is system dependent.  On Cygwin it's interpreted as a
> > UNC path.  That explains the error, but I don't immediately see where
> > the extra slash comes from.  (There are plenty of references to UNC
> > paths and to "file://" and "file:///" in dnd.el, so maybe there's some
> > code in there that incorrectly assumes that MS-Windows is the only
> > platform on which exactly 2 initial slashes has a special meaning.)
> >
> > Ken
>
> Unless system-type can be windows-nt on Cygwin, I don't think that can
> happen.

No, system-type is cygwin on Cygwin.

>  I will look into this, thanks.

Thanks.

Ken