return curCtx, false, fmt.Errorf("%s event for proc that's not %s or %s", go122.EventString(ev.typ), go122.ProcRunning, go122.ProcSyscall)
	}
	reqs := event.SchedReqs{Thread: event.MustHave, Proc: event.MustHave, Goroutine: event.MayHave}
	if err := validateCtx(curCtx, reqs); err != nil {
		return curCtx, false, err
	}
	state.status = go122.ProcIdle
	newCtx := curCtx
	newCtx.P = NoProc