.

wcfs/δbtail.go

@@ -943,8 +943,7 @@ func (δBtail *ΔBtail) rebuild() (err error) {
 	// FIXME here trackNew was adjusted to correspond to @tail
 	// FIXME -> we have to map it back to correspond to @head before merge
 	//
-	// XXX -> teach diffT to return not only δtrack, but also δtrack*
-	// (conjugate) that would describe how track index changes if going A<-B ?
+	// TODO -> remember δtracks from treediff; reverse them and apply them back in reverse order.
 	δBtail.trackIdx.UnionInplace(trackNew)
 
 	return nil