return -1
	}
	second := strings.Index(s[first+1:], substr)
	if second == -1 {
		return -1
	}
	return first + second + 1
}

// splitPath splits a path into a top-level directory and a child item. The
// parent directory retains the trailing slash.
func splitPath(s string, secondIndex bool) (string, string) {
	var i int
	if secondIndex {
		i = findSecondIndex(s, "/")
	} else {

// mismatches, etc.
//
// If an aggregation node is present as a descendant (when
// e.prop.isAggregation is true), we call evalNode on all child nodes,
// check for errors, but do not perform any combining of the results
// of child nodes. The final result row is returned after all rows are
// processed, and the `getAggregate` function is called.

			// and the entry itself is compacted.
			if !into.Compacted && f.oldCache.isCompacted(h) {
				if !h.mod(f.oldCache.Info.NextCycle, dataUsageUpdateDirCycles) {
					// Transfer and add as child...
					f.newCache.copyWithChildren(&f.oldCache, h, folder.parent)
					into.addChild(h)
					continue
				}
			}
			f.updateCurrentPath(folder.name)

func (d *dataUsageCache) deleteRecursive(h dataUsageHash) {
	if existing, ok := d.Cache[h.String()]; ok {
		// Delete first if there should be a loop.
		delete(d.Cache, h.Key())
		for child := range existing.Children {
			d.deleteRecursive(dataUsageHash(child))
		}
	}
}

// dui converts the flattened version of the path to madmin.DataUsageInfo.
// As a side effect d will be flattened, use a clone if this is not ok.