if o.gcState != gcUndetermined {
			return curCtx, false, fmt.Errorf("GCActive in the first generation isn't first GC event")
		}
		o.gcSeq = seq
		o.gcState = gcRunning
		o.queue.push(Event{table: evt, ctx: curCtx, base: *ev})
		return curCtx, true, nil
	}
	if seq != o.gcSeq+1 {
		// This is not the right GC cycle.
		return curCtx, false, nil
	}
	if o.gcState != gcRunning {