When all children from a process end, and the parent awakes, such process won't necessarily be at the waiting process list

[Mithrandir0x]

In the function tratar_padre, if the current process is to be awakened because all its children ceased to exist, the process not necessarily may be in l_wait_procs. It may have been blocked by other reasons (being run-through/prioritized, sleeping like a lazy yokel)