If we can avoid the below being called from a TerminatingObserver when the
process is possibly in an inconsistent state we can avoid being hit by #3754.
public final Isa getIsa ()
if (isa == null)
isa = sendrecIsa();
December 19, 2006
* LinuxPtraceTaskState.java (.transitionToAttached): notify Task of
* ProcBlockAction.java (ProcBlockAction): return/exit after addFailed call.
* Task.java: Added variable taskStateAttached, fills isa on attach.
(notifyExeced): Clear isa using clearIsa rather than isa = null.