Memory Leak in Transform

[MariaMikhnevich]

In Transform, in the tr.nodes (setNodes) method, one of the subscriptions depends on the private property _mattersAffectingSize. Node has the value of this property equal to [], and only some elements of the array have values.

Upon tr.detach(), subscriptions are unsubscribed only with the value. But due to the fact that our _attrsAffectingSize property has the value [], the map does not start and the additionalEvents variable is assigned the value ". Accordingly, when using tr.destroy(), this subscription is not unsubscribed, and if we create another transformer and add the same element to nodes, and then call tr.destroy(), the number of subscriptions in the element increases.

If you set the _attrsAffectingSize property in Node to ["] instead of [], subscriptions and unsubscriptions start working correctly.

[lavrton]

Do you want to create a Pull Request with the tests and fix?

[MariaMikhnevich]

Thanks for the answer! Sorry, I'm not good at tests. But I can create a Pull Request without tests. Do it?