glog.V(logger.Warn).Infof("Pivot doesn't match locked in version: have #%v [%x…], want #%v [%x…]",pivot.Number,pivot.Hash().Bytes()[:4],d.fsPivotLock.Number,d.fsPivotLock.Hash().Bytes()[:4])
returnerrInvalidChain
}
}
// Unless we're doing light chains, schedule the headers for associated content retrieval
ifd.mode==FullSync||d.mode==FastSync{
// If we've reached the allowed number of pending headers, stall a bit