.

wcfs/δftail.go

@@ -150,8 +150,9 @@ func (δFtail *ΔFtail) ForgetPast(revCut zodb.Tid) {
 //
 // if exact=False - what is returned is only an upper bound for last block revision.
 //
+// f must be from head/
 // at must ∈ (tail, head]	XXX [tail ?
-// XXX blk must be tracked?
+// blk must be tracked
 //
 // XXX +ctx, error	rebuild []δF here
 func (f *BigFile) LastBlkRev(blk int64, at zodb.Tid) (_ zodb.Tid, exact bool) {