error in calendar

[Frederik Fouvry]

Symptoms:

Hi,

When calling up the calendar, since a few days, I get the following error:

Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
  calendar-date-is-legal-p(nil)
  mark-visible-calendar-date(nil calendar-today-face)
  calendar-mark-today()
  run-hooks(today-visible-calendar-hook)
  byte-code("ƒ
  generate-calendar-window(3 2005)
  calendar-basic-setup(nil)
  calendar(nil)
  call-interactively(calendar)

It seems to have to do with the return value of
(calendar-cursor-to-date), which is not expected (by
mark-visible-calendar-date) to be `nil'.

It makes it impossible to save the diary files, because the
appointments are automatically updated when the calendar is saved
(which causes an error, and saving is not completed).


In GNU Emacs 22.0.50.13 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2005-03-04 on cc.at.coli.uni-sb.de
Distributor `The XFree86 Project, Inc', version 11.0.40201000
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: POSIX
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: address@hidden
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: 
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Major mode: Debugger

Minor modes in effect:
  auto-image-file-mode: t
  desktop-save-mode: t
  global-auto-revert-mode: t
  iswitchb-mode: t
  which-function-mode: t
  show-paren-mode: t
  recentf-mode: t
  display-time-mode: t
  auto-insert-mode: t
  auto-compression-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
<show-branches> <menu-bar> <show> <show-children> <menu-bar> 
<show> <show-subtree> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <next> <next> <prior> 
<prior> <down-mouse-1> <mouse-1> <menu-bar> <show> 
<show-subtree> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <next> <next> C-x 
k <return> C-c c <help-echo> <help-echo> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <menu-bar> 
<options> <debug-on-error> <down-mouse-1> <mouse-1> 
C-x 1 C-x k <return> q C-c c <help-echo> <down-mouse-1> 
<drag-mouse-1> <help-echo> <down-mouse-1> <mouse-movement> 
<mouse-movement> <drag-mouse-1> <help-echo> <help-echo> 
<help-echo> <help-echo> <menu-bar> <help-menu> <re
port-emacs-bug>

Recent messages:
Marking diary entries...done
Marking holidays...done
Marking diary entries...done
Marking holidays...done
Marking diary entries...done
Marking holidays...done
Marking diary entries...done [2 times]
Loading debug...done
Entering debugger...
Loading emacsbug...done