Re: stklos problem: stack corruption with scale and canvas

From: Erick Gallesio <eg_at_essi.fr>
Date: Tue, 11 Jun 2002 12:36:10 +0200

On Wed, 05 Jun 2002 13:31:50 -0700
Mark Montague <monty_at_gg.caltech.edu> wrote:

> Hi, schemers--
>
> I've been trying to write a little application with STklos 0.52, which
> I compiled myself for debian i386 linux. When I run this program,
> after some time fiddling with the sliders, it appears to pass the
> wrong info somewhere, i.e.:
>
> Error while executing file "minbug.byte" (%adj-ctrl: "bad adjustment
> `(137.682157106091 114.056524563929 141.369126005883 117.433840115068
> 145.056094905675 120.811155666207 148.743063805468 124.188471217346
> 152.43003270526 127.565786768485 156.117001605052)'").
> EXIT
>
> It seems to be more likely to happen when I tweak one slider for a
> while, then switch to another. The problem seems independent of
> whether the program is compiled or interpreted. Decreasing the
> complexity of the canvas objects updated seems to help, as does using
> :update-policy 'delayed (commented out below) but neither of these
> solves the problem completely. Suspiciously, it doesn't seem to crash
> if I update only one slider.

What you describe here looks like a GC problem. I really don't like
those kind of bugs :-<.
I'll try to have a look at this problem tonight. Thanks for signaling
it.

-- 
Erick
Received on Tue Jun 11 2002 - 12:53:00 CEST

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