bug#3463: 23.0.94; describe-variable misses buffer local value for long outputs

> describe-variable overwrites its own input when showing the value of a
> buffer local variable that has a default value with long output. To
> show this start from "emacs -Q" and in *scratch* write
> 
>   (set (make-local-variable 'auto-mode-alist) nil)
> 
> and eval it. Then show the value of auto-mode-alist in *scratch* with
> describe-variable.

I did that, but I don't see the problem. Can you describe (or show)
what the problem is that you see? What do you mean by "overwrites
its own input"?

In GNU Emacs 23.0.94.1 (i386-mingw-nt5.1.2600)
 of 2009-05-24 on SOFT-MJASON
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4)'