In info: Wrong type argument: stringp, nil

[Jan D.]

Symptoms:

When doing C-h for the first time, the "dir" node is shown.  The menu item
and tool bar item back in history is enabled.  Selecting Back in history in
the menu, pressing the tool bar putton, or just using the key l gives:
byte-code: Wrong type argument: stringp, nil

The menu item looks like this:
   ["Back in history" Info-history-back :active Info-history
    :help "Go back in history to the last node you were at"]

but when entering "dir" for the first time, the value of Info-history is
not nil, but ((nil nil 1)).  The first nil is supposed to be a file name
and it is when info tries to use it as such the error message above shows
up.  How Info-history becomes ((nil nil 1)) instead of just nil I don't know.


If emacs crashed, and you have the emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
If you would like to further debug the crash, please read the file
/opt/emacs-cvs/share/emacs/22.0.50/etc/DEBUG for instructions.


In GNU Emacs 22.0.50.1 (i686-pc-linux-gnu, GTK+ Version 2.6.9)
 of 2005-12-27 on gaffa
X server distributor `The X.Org Foundation', version 11.0.60802000
configured using `configure '--prefix=/opt/emacs-cvs' '--verbose' 
'--with-x-toolkit=gtk' 'CFLAGS=-g''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: C
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: sv_SE
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  auto-compression-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-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
  line-number-mode: t

Recent input:
<down-mouse-1> <mouse-1> <help-echo> <help-echo> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<menu-bar> <help-menu> <report-emacs-bug>

Recent messages:
(emacs -q)
Loading disp-table...done
For information about the GNU Project and its goals, type C-h C-p.
Loading emacsbug...done