bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely

[Eli Zaretskii]

> From: <emacs@kosowsky.org>
> Date: Mon, 11 Nov 2013 14:40:29 -0500
> Cc: Alp Aker <alptekin.aker@gmail.com>, emacs@kosowsky.org,
>       15648@debbugs.gnu.org
> 
> I tested it against the November 6th build.
> 
> It seems to work in the sense that now instead of crashing emacs,
> gnutls just throws me into the emacs debugger:
> 
> Debugger entered--Lisp error: (gnutls-error #<process tls> -64)
>   signal(gnutls-error (#<process tls> -64))
>   gnutls-negotiate(:process #<process tls> :type gnutls-x509pki
>   :hostname "imap.gmail.com")
>   open-gnutls-stream("tls" "tls-buffer" "imap.gmail.com" "imaps")
>   eval-region(19 83 t #[257 "\300\242b\210\301\207" [(83)
>   (open-gnutls-stream "tls" "tls-buffer" "imap.gmail.com" "imaps")] 2
>   "\n\n(fn IGNORE)"])  ; Reading at buffer position 83
>   eval-defun-2()
>   eval-defun(nil)
>   call-interactively(eval-defun nil nil)
>   command-execute(eval-defun)

Thank you.  So I consider this bug resolved, and I'm closing it.

> Presumably, this error is due to the fact that
> "/usr/ssl/certs/ca-bundle.crt" is not a valid file on Cygwin (despite
> the comment in gnutls.el implying that it is!)

No, this is because "/usr/ssl/certs/ca-bundle.crt" _is_ a valid Cygwin
file name, but you are not running a Cygwin build of Emacs, where it
would be valid.

> Of course, it all works fine with the elisp patch that I had
> previously submitted.

You are free to use that patch, if it suits your needs.  This is Free
Software.

> So, now that the bug that crashes the emacs process has been fixed,
> perhaps it's time to make gnutls-trustfiles actually work under
> cygwin.

They already work under Cygwin.  You probably mean cygwin-mount.el,
which is an incomplete and imperfect way of sneaking Cygwin file names
into a native Windows build of Emacs and pretending they work.

> So, there remains a fundamental incompatibility between cygwin-mount
> and gnutls.el.

Actually, there's a fundamental incompatibility between cygwin-mount
and a native build of Emacs.  Just say no.