Re: crashes during Feval from within WINDOW_WANTS_HEADER_LINE_P

[Stefan Monnier]

> I'm getting crashes after extending a macro.  I would appreciate your help.

> I have added to the WINDOW_WANTS_HEADER_LINE_P macro (dispextern.h)
> a function call to an elisp function whose name is stored in `window- 
> wants-header-line-function':

>       && (NILP(Vwindow_wants_header_line_function) ||                   \
>         !NILP (safe_call_win(Vwindow_wants_header_line_function, (W)))))

I'd be surprised if this macro is only used at places where it is safe
to run elisp code.  When doing such things, I highly recommend you run
with -DENABLE_CHECKING (which I don't guarantee will catch your
problem, but may).


        Stefan