probes and dropped objects

[Pietro Terna]

        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

test.tar.gz
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