Re: crashes during Feval from within WINDOW_WANTS_HEADER_LINE_P

[David Reitter]

On 1 Mar 2008, at 20:58, Nick Roberts wrote:

> > However, I keep getting crashes, always during the evaluation of said
> > function:
>
> and it looks to me like the elisp function whose name is stored in
> `window-wants-header-line-function' is a lisp primitive which either  
> has
> too many argumnts ( > 8 ) or whose argument list has been incorrectly
> defined.

I found the same in the code, but this is not true. The function is

(defun need-header-line-p (window)  t)

and it seems to get called in some situations without problems.
Perhaps there is some re-entrance business when re-display is  
triggered from the Lisp side? Is that possible?

I've not found much in the way of documentation (beyond a section in  
the the Emacs Lisp Reference), and it's pretty hard to find one's way  
into the C source.

Either way, I've solved my problem now without calling a Lisp function.

- D