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Re: probes and dropped objects


From: Pietro Terna
Subject: Re: probes and dropped objects
Date: Wed, 06 Sep 2000 15:05:32 +0200

        An auto-reply: a simple solution is that of assigning a null values to the variables related to the dropped objects, like

[ops drop];
drop = nil;

        Pietro

At 13.33 06/09/00 +0200, you wrote:
        Hi All,

        if you open a probe 'on the fly' to an object containing a pointer to a dropped object, you have a segmentation error.

        The attached test.tar.gz file contains a simple example of that: if you press 'start' or 'next' and _then_ open a full probe to ObserverSwarm, right clicking on the ObserverSwarm label, the program crashes. Eliminating the drop message to the ops instance of Ops class, the problem disappears.

        Any opinion on how to avoid this problem? It's a serious one, because in the debug phase it is quite obvious to open probe to objects 'on the fly', so mapping all the variables and methods of the object: if one of these variables is a pointer to a dropped object ...

        Thanks in advance, Pietro


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