.

wcfs/internal/zdata/δftail.go

@@ -517,6 +517,8 @@ func (δftail *_ΔFileTail) forgetPast(revCut zodb.Tid) {
 //
 // the caller must not modify returned slice.
 //
+// XXX only tracked blocks are guaranteed to be present.
+//
 // Note: contrary to regular go slicing, low is exclusive while high is inclusive.
 func (δFtail *ΔFtail) SliceByFileRev(zfile *ZBigFile, lo, hi zodb.Tid) /*readonly*/[]*ΔFile {
 	fmt.Printf("\nslice f<%s> (@%s,@%s]\n", zfile.POid(), lo, hi)
@@ -659,7 +661,7 @@ func (δFtail *ΔFtail) SliceByFileRev(zfile *ZBigFile, lo, hi zodb.Tid) /*reado
 					if δzblk.New != xbtree.VDEL {
 						inblk, ok := Zinblk[δzblk.New]
 						if ok {
-							inblk.Del(blk)
+							inblk.Del(blk)	// FIXME have to recheck vδZ for later entries of δzblk.New
 						}
 					}
 					if δzblk.Old != xbtree.VDEL {