[CM] Grace freezes on sprout

[Sergey]

On Sat, Sep 22, 2012 at 11:37:32AM -0500, Heinrich Taube wrote:
> > 
> > Another thing I'd like to report that even when doing absolutely
> > nothing, Grace uses about 34% of my CPU.  That's what happens when
> > I run a fresh instance of Grace, without loading any files, nor
> 
> On OSX grace hovers around 1.2 pct of cpu which is total fine, ill test it on linux once i can figure out the crash.

Actually, it looks like on a freshly rebooted Linux system, Grace only
takes up about 14% of the CPU.  That's a lot better than the 34% I saw
earlier, but still a far cry from 1.2%

I should mention that I'm running Grace on a single-core amd64 3000+
CPU, with 4 gigs of ram, and a 3.3.8-gentoo kernel with the PREEMPT
patch.

> does switching to format stop the crash?
> 
> 
> (define (foo)
>   (let ((sequence '(0 1 2)))
>     (process
>       for i from 0 to (length sequence)
>       for current-element = (nth sequence i)
>       do
>       (format #t "~A~%" current-element)
>       (wait 1))))
> 
> (sprout (foo))

Nope.  Grace reacts identically when running this code as it did when
running the code I posted in my original message.  Also, I don't think
this behavior is a consequence of the new error handling code, because
the old 3.8.0 version of Grace exhibits the same behavior.

Thanks for looking in to this,

  --Sergey