Forgot to include pd-list...

---------- Forwarded message ----------
From: "Ivica Bukvic" <ico@vt.edu>
Date: May 19, 2014 2:57 PM
Subject: Re: [PD] [expr] external crashing pd
To: "IOhannes m zmoelnig" <zmoelnig@iem.at>
Cc:

This had been fixed in pd-l2ork a while ago, it is alloc/dealloc error where math is off by one and hence the crash. On top of that pd-l2ork version warns user they have exceeded the number of allowable arguments and fails to create the object this preventing potential problems that may come as a result of improperly instantiated object receiving data. Please dig through recent pd-l2ork commits to find the fix.

HTH

On May 19, 2014 1:11 PM, "IOhannes m zmoelnig" <zmoelnig@iem.at> wrote:
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On 2014-05-16 21:12, Kim Cascone wrote:
>
> two situations are crashing pd:
>
> - when I try to change an expression in the object, like multiply
> a ratio by 2 or something it crashes pd

unable to reproduce.

>
> - when I attempt to create 10 ratio divisions with outlets (try
> adding one to the patch I've attached below) it crashes the app as
> well
>
> is this a known bug?

kind of.
looking at the sources of expr i see (extra/expr~/vexp.h):

<snip>
/*
 * Currently the maximum number of variables (inlets) that are supported
 * is 10.
 */
#define MAX_VARS        9
</snip>

and later (showing that not only the "inlets" are limited, but also
the number of outlets is hardcoded to MAX_VARS):
<snap>
  t_outlet *exp_outlet[MAX_VARS];
</snap>

so you cannot have more than 9 inlets.
expr should not crash though, and instead print something to the
pd-console, that tells you about that problem.

so for now, my hint would be to not use [expr] and instead do explicit
patching.
in your case this is pretty straightforward (see attached patch...)


fgamsdr
IOhannes
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