Major memory leak - impossible to unload a model

[badetitou]

How can we remove a model from the memory?

After importing a model, I saw that there are errors in it. So, I regenerated another one and I tried to remove the previous one.

But, how to remove a model? (and free the Pharo memory!)

I tried

1. remove the model from the Models Browser (model > utility > delete) -> There are still references
2. remove the model from the logger -> there are still references

I don't know what I can do more? the model is stuck at some place in a bus I can see it when I open a new browser (such as query browser or inspector).

In my opinion, this is a major bug that we should fix as soon as possible.

[NicolasAnquetil]

Not an easy one:

• all entities in a model have a reference to it
• all tools may reference any of the entities so it is a lot of potential references that are lying around

We could look at the solutions offered by Pharo (like weakReferences), or when deleting a model, we could browse through all its entities to remove the back pointer form the entity to the model ...

[fuhrmanator]

With TypeScript (certainly inconsistent!) models I see I can't delete them at all. Is that a different bug?

[NicolasAnquetil]

@fuhrmanator yes, this is something else see #711

[anneetien]

@ClotildeToullec @jordanmontt please have a look.