Error trying to access nnimap groups

Error trying to access nnimap groups

[Nevin Kapur]

Trying to access my IMAP server, Gnus failed with the following
backtrace.  It looks like preview-latex defines set-buffer-multibyte
in XEmacs and imap-disable-multibyte calls it resulting in the error.

I'm not sure whose bug this is so I'm sending this to both lists.

Signaling: (invalid-function (macro . #<compiled-function (multibyte) "...(10)" [multibyte (if (fboundp (quote set-buffer-file-coding-system)) (set-buffer-file-coding-system (quote binary))) error unimplemented "`set-buffer-multibyte is only implemented for the binary case."] 3 ("/share/lib/xemacs/xemacs-packages/lisp/preview/prv-xemacs.elc" . 2012)>))
  set-buffer-multibyte(nil)
  imap-open("jesse.mts.jhu.edu" nil nil nil " *nnimap* jesse")
  nnimap-open-connection("jesse")
  nnimap-open-server("jesse" ((nnimap-address "jesse.mts.jhu.edu") (nnimap-list-pattern ("INBOX" "mail/*" "Sent Items" "Draft" "#shared/support/%" "Trash*"))))
  byte-code("..." [gnus-command-method gnus-get-function open-server] 3)
  gnus-open-server((nnimap "jesse" (nnimap-address "jesse.mts.jhu.edu") (nnimap-list-pattern ("INBOX" "mail/*" "Sent Items" "Draft" "#shared/support/%" "Trash*"))))
  byte-code("..." [result method gnus-open-server] 2)
  gnus-check-server((nnimap "jesse" (nnimap-address "jesse.mts.jhu.edu") (nnimap-list-pattern ("INBOX" "mail/*" "Sent Items" "Draft" "#shared/support/%" "Trash*"))))
  gnus-select-newsgroup("nnimap+jesse:mail/Mailbox" nil nil)
  gnus-summary-read-group-1("nnimap+jesse:mail/Mailbox" nil t nil nil nil)
  gnus-summary-read-group("nnimap+jesse:mail/Mailbox" nil t nil nil nil nil)
  gnus-group-read-group(nil t)
  gnus-group-select-group(nil)
  gnus-topic-select-group(nil)
  call-interactively(gnus-topic-select-group)


-Nevin

Re: Error trying to access nnimap groups

[Katsumi Yamaoka]

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Hi,

>>>>> In <m3y9atthj6.fsf@fermat.mts.jhu.edu>
>>>>>	Nevin Kapur <nevin@jhu.edu> wrote:

> Trying to access my IMAP server, Gnus failed with the following
> backtrace.  It looks like preview-latex defines set-buffer-multibyte
> in XEmacs and imap-disable-multibyte calls it resulting in the error.

> I'm not sure whose bug this is so I'm sending this to both lists.

> Signaling: (invalid-function (macro . #<compiled-function (multibyte)...
>   set-buffer-multibyte(nil)
>   imap-open("jesse.mts.jhu.edu" nil nil nil " *nnimap* jesse")
>   nnimap-open-connection("jesse")

The problem is that the macro `set-buffer-multibyte' is defined
at run-time, but it is not available at the Gnus compile-time.
IMHO, since the function `set-buffer-multibyte' is a Lisp
function in FSF Emacs, prv-xemacs.el should define it as also a
function, not a macro.  Here is a patch for imap.el:


[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: Type: text/x-patch, Size: 405 bytes --]

--- imap.el~	2002-08-12 22:00:26 +0000
+++ imap.el	2002-08-26 23:44:57 +0000
@@ -414,7 +414,8 @@
 
 (defsubst imap-disable-multibyte ()
   "Enable multibyte in the current buffer."
-  (when (fboundp 'set-buffer-multibyte)
+  (when (and (fboundp 'set-buffer-multibyte)
+	     (subrp (symbol-function 'set-buffer-multibyte)))
     (set-buffer-multibyte nil)))
 
 (defun imap-read-passwd (prompt &rest args)

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BTW, APEL defines `set-buffer-multibyte' for XEmacs as follows:

(defsubst set-buffer-multibyte (flag)
  flag)
-- 
Katsumi Yamaoka <yamaoka@jpl.org>

Re: Error trying to access nnimap groups

[Nevin Kapur]

Katsumi Yamaoka <yamaoka@jpl.org> writes:

> Hi,
>
>>>>>> In <m3y9atthj6.fsf@fermat.mts.jhu.edu>
>>>>>>	Nevin Kapur <nevin@jhu.edu> wrote:
>
>> Trying to access my IMAP server, Gnus failed with the following
>> backtrace.  It looks like preview-latex defines set-buffer-multibyte
>> in XEmacs and imap-disable-multibyte calls it resulting in the error.
>

[...]

> The problem is that the macro `set-buffer-multibyte' is defined
> at run-time, but it is not available at the Gnus compile-time.
> IMHO, since the function `set-buffer-multibyte' is a Lisp
> function in FSF Emacs, prv-xemacs.el should define it as also a
> function, not a macro.  Here is a patch for imap.el:

Thank you for your analysis.  I will send in a bug report for
preview-latex where it seems the problems lies.  I've now also had w3
complaining about set-buffer-multibyte after loading preview-latex.

I will try your patch and report back if I see any problems.

-Nevin