Lars Magne Ingebrigtsen <larsi@gnus.org> writes:

> Could you `(load "rfc2047.el")' to load an uncompiled Gnus?  That will
> give me a much more detailed backtrace.

Sure thing. Reproducing it was not that easy. I don't know what
exactly causes the bug, because several messages with cyrillic in
subject and body went out Ok. There must be something with *this*
particular one. Just in case it would be helpful, I'm attatching it to
this file.

Signaling: (wrong-type-argument integer-or-marker-p nil)
  goto-char(nil)
  (cond ((memq ... ...) (setq break ...)) ((and ... ...) (setq break ...)) ((and ... ...) (goto-char break) (setq break nil) (insert "\n ")))
)
  (while (not (eobp)) (cond (... ...) (... ...) (... ... ... ...)) (unless (eobp) (forward-char 1)))
)
  (let ((break nil)) (while (not ...) (cond ... ... ...) (unless ... ...)))
)
  (save-restriction (narrow-to-region b e) (goto-char (point-min)) (let (...) (while ... ... ...)))
)
  rfc2047-fold-region(25 146)
  (cond ((eq method ...) (rfc2047-encode-region ... ...) (rfc2047-fold-region ... ...)) (t))
)
  (progn (while (setq elem ...) (when ... ...)) (cond (... ... ...) (t)))
)
  (if (rfc2047-encodable-p) (progn (while ... ...) (cond ... ...)))
)
  (when (rfc2047-encodable-p) (while (setq elem ...) (when ... ...)) (cond (... ... ...) (t)))
)
  (save-restriction (rfc2047-narrow-to-field) (when (rfc2047-encodable-p) (while ... ...) (cond ... ...)) (goto-char (point-max)))
)
  (while (not (eobp)) (save-restriction (rfc2047-narrow-to-field) (when ... ... ...) (goto-char ...)))
)
  (let ((alist rfc2047-header-encoding-alist) elem method) (while (not ...) (save-restriction ... ... ...)))
)
  (save-excursion (goto-char (point-min)) (let (... elem method) (while ... ...)) (when mail-parse-charset (encode-coding-region ... ... mail-parse-charset)))
)
  mail-encode-encoded-word-buffer()
  message-send-mail(nil)
  message-send-via-mail(nil)
  message-send(nil)
  message-send-and-exit(nil)
  call-interactively(message-send-and-exit)