imenu with cc-mode in emacs 22 (win32)

[Rudolfo Ungern <rolf_unger@hotmail.com>]

Hi,

i switched to emacs-22.3 recently and have a problem with speedbar/
imenu
in cc-mode. When I try to navigate with imenu to a function emacs eats
up
all the CPU resources and is not responding anymore.

Imenu is working with perl files (with perl-mode) with sql files, but
not with
cc mode. No matter if it is c++ or plain c code.

It must be something in my .emacs, because navigating in the same
source
files with imenu works if I skip my .emacs (that is: start emacs as
another user)

On the other hand the same .emacs file works find with emacs-21.3 and
imenu.
(of course i use some different code depending on the emacs version,
but that
does not affect imenu nor cc-mode.

It seems like the imenu related lisp code runs in some never-ending
loop.
I guess it would help me a lot, if I can have some hints how to
activate the
elisp debugger.

I know that this post is pretty vague, but the alternative would have
been to
paste 400 lines of the .emacs into this post.

I usually use

 (add-hook 'c-mode-common-hook 'my-c-mode-hook)

in my .emacs file, with some indentation adjustments in my-c-mode-
hook.
but even if I deactivate this add-hook expression I still run in the
problem with
imenu.

The other suspected piece of code is in customization:

(custom-set-variables
  ;
 '(imenu-sort-function (quote imenu--sort-by-name)))

but commenting it out, doesn't help either.

If someone knows what areas have changed in imenu from emacs21 to
emacs22, that could give me a hint where to search for the root of
the problem.

Thanks, Rolf