Info-fontify-node hangs Emacs

[Jesper Harder]

A `re-search-forward' in `Info-fontify-node' hangs Emacs -- it
can't even be interrupted with `C-g'.

Steps to reproduce:

* emacs -q --no-site-file
* `C-h i'
* `m emacs'

I can get this backtrace with `toggle-debug-on-quit':

Debugger entered--Lisp error: (quit)
  re-search-forward("^\\* +\\(\\(?:[^:\n]+\\|:[^,.;()   \n]\\)*\\)\\(:[         
]*\\(\\(([^)]+)\\)?\\([^.,:]*[^.,: ]\\|\\)\\)[,:.]\\([  ]*\\)\\)" nil t)
  Info-fontify-node()
  Info-select-node()
  Info-find-node-2("/usr/local/info/emacs" "Top" nil)
  Info-find-node(#("emacs" 0 5 (invisible t)) "Top")
  Info-goto-node(#("(emacs)" 0 7 (invisible t)) nil)
  Info-menu("emacs" nil)
  call-interactively(Info-menu)

If I switch back to the Info buffer Emacs still hangs, though, and
the process can only be stopped by killing it.



In GNU Emacs 21.3.50.123 (i686-pc-linux-gnu)
 of 2003-07-05 on defun.localdomain
configured using `configure '--with-gtk''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  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: en_US.iso88591
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: t