.

wcfs/δbtail.go

@@ -1592,6 +1592,7 @@ func (δBtail *ΔBtail) SliceByRev(lo, hi zodb.Tid) /*readonly*/ []ΔB {
 // XXX root -> *Tree ?
 func (δBtail *ΔBtail) SliceByRootRev(root zodb.Oid, lo, hi zodb.Tid) /*readonly*/[]ΔTree {
 	δassertSlice(δBtail, lo, hi)
+	return []ΔTree{} // XXX stub
 	panic("TODO")
 }
 

wcfs/δbtail_test.go

@@ -1043,9 +1043,15 @@ func xverifyΔBTail_rebuild_TR(t *testing.T, db *zodb.DB, δbtail *ΔBtail, tj *
 	}
 
 	if !(reflect.DeepEqual(vat, vatOK) && reflect.DeepEqual(vδT, vδTok)) {
-		t.Errorf("@%s: after rebuild: SliceByRootRev:\nvat:\n\thave: %v\n\twant: %v\n\n"+
-			 "vδT:\n\thave: %v\n\twant: %v",
-			 xat[tj.at], vat, vatOK, vδT, vδTok)
+		have := ""
+		for i := 0; i<len(vδT); i++ {
+			have += fmt.Sprintf("\n\t@%s: %v", xat[vat[i]], vδT[i])
+		}
+		want := ""
+		for i := 0; i<len(vδTok); i++ {
+			want += fmt.Sprintf("\n\t@%s: %v", xat[vatOK[i]], vδTok[i])
+		}
+		t.Errorf("@%s: after rebuild: SliceByRootRev:\nhave: %v\nwant: %v", xat[tj.at], have, want)
 	}
 }