Re: Fedora Core 3: File mode specification error

* auc-tex-return-6709-angeli iwi (2005-01-18) writes:

> I just installed Fedora Core 3 (and ran "yum update") and the latest
> auctex rpm for fedora (auctex-emacs-11.54-2.fedora.noarch.rpm) from
[...]
> When I try to load a (la)tex file (new or existing), I get the
> following error message:
>
> (New file)
> Loading tex...
> Loading advice...done
> Loading tex...done
> Loading latex...done
> Loading font-latex...done
> File mode specification error: (error "Variable binding depth exceeds max-specpdl-size")
[...]
> Backtrace:

At last a backtrace.

> Debugger entered--Lisp error: (error "Variable binding depth exceeds max-specpdl-size")
[...]
>   regexp-opt-group(nil t t)
>   regexp-opt-group(nil t t)
>   regexp-opt-group(nil nil)
>   regexp-opt(nil)
>   font-latex-set-syntactic-keywords()
>   font-latex-setup()
>   VirTeX-common-initialization()
>   LaTeX-common-initialization()
>   latex-mode()
> * call-interactively(latex-mode)
>   execute-extended-command(nil)
>   call-interactively(execute-extended-command)

Could it be that `regexp-opt' in Emacsen shipped with Fedora is
broken?  With every Emacs I have here `M-: (regexp-opt nil) RET'
returns `""'.  And according to the source code of `regexp-opt-group'
that's what is supposed to happen.

As a workaround I could check in `font-latex-syntactic-keywords' if
the argument given to `regexp-opt' is empty and inhibit its call.  But
I am really wondering why there is this error on Fedora systems.

-- 
Ralf