> > * I found an occurrence in my version of 
> > `describe-function', which is based on the vanilla
> > Emacs 22 version in this respect.  It has to work for 22+,
> > and 22 does not have macro `with-help-window'.
> 
> We are looking for Lisp code that would show calls to some primitives,
> wherein we could look for potential bugs on the C level.  Does the
> body of Lisp code inside save-excursion in the first occurrence call
> any primitives, or any functions at all?  If so, can you show that
> body?

The code is attached.  Clearly the body calls "any functions at all".  HTH.