[Oberon] System Freeze on module unloading

[Felix Friedrich]

Hi Frank,
>I believe the best way to solve the problem is to have a termination handler
>for each module.
It is no problem to implement a termination Handler, there is a mechanism 
in Oberon for that, but:
A module does not trace the opened objects. It is THE advantage of 
automatic garbage collection, that one does not have to dealloc (and 
therefore trace) objects. (Maybe the system could check allocated memory ? 
On the other hand: I want to be the boss of my computer: I say System.Free 
and I want the system to execute System.Free unless there are very specific 
reasons not to do, like depending modules. I do not accept depending 
objects as a reason since there seems to be no way to check if displayed 
objects depend on any of the freed objects. )

Felix.