.

wcfs/internal/zdata/δftail.go

@@ -531,7 +531,7 @@ func (δFtail *ΔFtail) SliceByFileRev(zfile *ZBigFile, lo, hi zodb.Tid) /*reado
 			ZinblkAt = epoch
 		}
 
-		// merge current vδZ and vδT
+		// merge vδZ and vδT of current epoch
 		for ((iz >= 0 && vδZ[iz].Rev >= epoch) || it >= 0) {
 			// δZ that is covered by current Zinblk
 			// -> update δf
@@ -588,7 +588,13 @@ func (δFtail *ΔFtail) SliceByFileRev(zfile *ZBigFile, lo, hi zodb.Tid) /*reado
 			}
 		}
 
-
+		// emit epoch δf
+		if ie >= 0 {
+			δf := vδfTail(vδE[ie].Rev)
+			δf.Epoch = true
+			δf.Blocks = nil // XXX must be already nil
+			δf.Size = false // XXX must be already false
+		}
 	}