[Mew-dist 15581] T message bombs out

[Tak Ota]

ある T マークの着いたメッセージを見ようとすると以下のようなエラーになっ
てしまいました。

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Debugger entered--Lisp error: (wrong-type-argument arrayp nil)
  aref(nil 1)
  (mew-syntax-get-begin part)
  (let* ((hbeg ...) (hend ...) (body ...)) (insert-buffer-substring cache hbeg hend) (mew-header-arrange (point-min) (point-max)) (cond (... ...) (... ...)))
  (let ((buffer-read-only nil) (inhibit-read-only t) (zmacs-regions nil)) (let* (... ... ...) (insert-buffer-substring cache hbeg hend) (mew-header-arrange ... ...) (cond ... ...)))
  (mew-elet (let* (... ... ...) (insert-buffer-substring cache hbeg hend) (mew-header-arrange ... ...) (cond ... ...)))
  mew-mime-message/rfc822(#<buffer  *mew cache*3> nil)
  (let ((buffer-read-only nil) (inhibit-read-only t) (zmacs-regions nil)) (mew-summary-display-preamble) (mew-decode-syntax-copy cache) (mew-mime-message/rfc822 cache mew-decode-syntax) (mew-decode-syntax-print sumbuf mew-decode-syntax mew-syntax-multi-form mew-syntax-icon-spec) (mew-summary-display-postscript))
  (mew-elet (mew-summary-display-preamble) (mew-decode-syntax-copy cache) (mew-mime-message/rfc822 cache mew-decode-syntax) (mew-decode-syntax-print sumbuf mew-decode-syntax mew-syntax-multi-form mew-syntax-icon-spec) (mew-summary-display-postscript))
  mew-summary-display-message(#<buffer  *mew cache*3> #<buffer +inbox>)
  (cond ((or ... ... opart redisplay) (mew-decode-syntax-clear) (mew-decode-syntax-delete) (mew-summary-display-message cache sumbuf) (setq prefetch t)) (read-through (if ... ...)))
  (cond ((null cache) (mew-decode-syntax-delete) (cond ... ... ...)) (msg (cond ... ...)) (part (cond ... ...)))
  (progn (mew-summary-toggle-disp-msg (quote on)) (mew-window-configure (quote message)) (mew-current-set (quote fld) fld) (mew-current-set (quote msg) (or msg omsg)) (mew-current-set (quote part) part) (cond (... ... ...) (msg ...) (part ...)))
  (unwind-protect (progn (mew-summary-toggle-disp-msg ...) (mew-window-configure ...) (mew-current-set ... fld) (mew-current-set ... ...) (mew-current-set ... part) (cond ... ... ...)) (if mew-decode-error (message "MIME decoding error: %s" mew-decode-error)) (setq mew-message-buffer-summary vfld) (select-window win) (mew-summary-cursor-postscript nil) (if prefetch (mew-summary-cache-prefetch)) (if next (mew-summary-display-after mew-summary-show-direction)))
  (let* ((fld ...) (vfld ...) (msg ...) (part ...) (ofld ...) (omsg ...) (opart ...) (cache ...) (win ...) (read-through ...) (sumbuf ...) next prefetch) (unwind-protect (progn ... ... ... ... ... ...) (if mew-decode-error ...) (setq mew-message-buffer-summary vfld) (select-window win) (mew-summary-cursor-postscript nil) (if prefetch ...) (if next ...)))
  (cond ((eobp) (message "No message")) ((not ...) (message "No message")) (t (let* ... ...)))
  (mew-summary-msg-or-part (let* (... ... ... ... ... ... ... ... ... ... ... next prefetch) (unwind-protect ... ... ... ... ... ... ...)))
  (if (not (or redisplay mew-summary-buffer-disp-msg ...)) nil (mew-summary-msg-or-part (let* ... ...)))
  mew-summary-display(nil)
  (if (mew-summary-down) (mew-summary-display nil))
  mew-summary-display-down(nil)
  call-interactively(mew-summary-display-down)