task synchronization and activation

[evangeli@cnam.fr (Evangelista Sami)]

Hello all

Why does a task have to wait that all the tasks it created are
activated before
executing? I am thinking of point 9.2.5 of the RM :

"The task that created the new tasks and initiated their activations
(the activator) is blocked until all of these activations complete
(successfully or not)."

I can understand that a master has to wait for the tasks he created
before finalizing since in the other case it could "free" some memory
needed by its children.
But i cannot see why this synchronisation after activation is
necessary. What is the technical reason?

Thanks for any help

Sami