[Bug-AUCTeX] Emacs hangs when I type "\begin" before bracketed text

[Brian Milch]

My emacs freezes when I do the following:

1. Create a new file called test.tex.

2. Hit return twice, then type some text in square brackets, such as:


[some text]

3. Put the cursor at the beginning of the file.

4. Type:

\begin

When I type the "n" in "\begin", it does not appear on the screen.
Instead, emacs just hangs.  It does not respond to any input.  I can
stop it only by using the kill command in a terminal window.

Note that the problem does not occur if I type \begin on the line
immediately before [some text].  In that case, when I type the "n",
the word \begin turns blue and [some text] turns green.  The problem
occurs when there is a blank line between \begin and [some text].

Emacs  : GNU Emacs 21.4.1 (x86_64-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
of 2005-03-19 on athlon.lowpingbastards.de, modified by Debian
Package: AUCTeX 11.55

current state:
==============
(setq
window-system 'x
LaTeX-version "2e"
TeX-style-path '("style/" "auto/"
                  "/usr/share/emacs21/site-lisp/auctex/style/"
                  "/var/lib/auctex/emacs21/")
TeX-auto-save nil
TeX-parse-self nil
TeX-master t
)