bug#3467: 23.0.94; let + make-local-variable => let value made global

[Lennart Borgman <lennart.borgman@gmail.com>]

On Sat, Jun 6, 2009 at 12:48 AM, Lennart
Borgman<lennart.borgman@gmail.com> wrote:
>
> Sigh, and my suggestion was of course unnecessary stupid. What is
> needed is of course to record values and frame+buffer localness and
> dito values and reset them. Nothing less than this will ever work
> correctly, or?
>
> And does not this apply to all uses of specbind + unbind_to?
>
> Can it be sufficient to just change specbind and unbind_to? Is there
> anything else that will be affected by changes in the specbind stack?
> Since info about buffer+frame is alwas needed should specbinding be
> changed to the below form?
>
> struct specbinding
>  {
>    Lisp_Object symbol;
>    Lisp_Object old_value;
>    Lisp_Object old_buffer_value;
>    Lisp_Object old_frame_value;
>    specbinding_func func;
>    Lisp_Object unused;         /* Dividing by 16 is faster than by 12 */
>    Lisp_Object unused;
>    Lisp_Object unused;
>  };
>
> Is this structure used by other functions than specbind and unbind_to?

... and defvar ... but I do not think there are any more uses of
specbinding's structure. Or does some allocation need to change?