Comment 14 for bug 803774

I found one solution but I think is a temporary fix. The problem is that somehow interactions are not deleted properly. Below is a modified version of postLoad__calledFromScene - I am checking whether both bodies in contact actually exist before the interaction is inserted, otherwise return - but is not the core solution to the bug so I will post it here although not commit.

Chiara

void InteractionContainer::postLoad__calledFromScene(const shared_ptr<BodyContainer>& bb){
   bodies=&bb->body; // update the internal pointer
   clear();
   FOREACH(const shared_ptr<Interaction>& I, interaction){
      Body::id_t id1=I->getId1(), id2=I->getId2();
      if (!(*bodies)[id1] || !(*bodies)[id2]) return;
      else insert(I);}
   interaction.clear();
}

On 15 Jul 2012, at 18:08, Chareyre wrote:

> Running one additional step without erasing may avoid the problem, but it
> still needs a fix.
>
> --
> You received this bug notification because you are a member of Yade
> developers, which is the registrant for Yade.
> https://bugs.launchpad.net/bugs/803774
>
> Title:
> Saving, loading simulation with erased bodies crash.
>
> Status in Yet Another Dynamic Engine:
> Fix Released
>
> Bug description:
> Here is the bug :
>
> - launch yade (for example without any script)
> - add a sphere : O.bodies.append(utils.sphere((0.2,0.2,0.2),0.006))
> - delete it : O.bodies.erase(0)
> - save yade's universe : O.save("./test")
> - quit yade
> - launch yade
> - load the file : O.load("./test")
> ->segmentation fault
>
> I think it's because when you erase something the size of O.bodies (etc...) doesn't change and now contains an empty value. (the c++ array may not be dynamic ?)
> So when the O.load() function is called, yade try to load a non-existant body ?
>
> Maybe this can be fixed by changing the load() method ?
>
> I joined the debug output.
>
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>
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