.

wcfs/internal/xbtree/rangeset.go

@@ -369,6 +369,11 @@ func (A *RangeSet) Equal(B *RangeSet) bool {
 	return true
 }
 
+// Clear removes all elements from the set.
+func (S *RangeSet) Clear() {
+	S.rangev = nil
+}
+
 func (S RangeSet) String() string {
 	s := "{"
 	for i, r := range S.rangev {

wcfs/internal/xbtree/treediff.go

@@ -732,7 +732,7 @@ func diffT(ctx context.Context, A, B *Tree, δZTC SetOid, trackSet PPTreeSubSet)
 
 			// XXX k is not there -> hole	XXX test
 		}
-		Bkqueue = SetKey{}
+		Bkqueue.Clear()
 
 		tracef("\n")
 		tracef("  Akq: %s\n", Akqueue)
@@ -768,7 +768,7 @@ func diffT(ctx context.Context, A, B *Tree, δZTC SetOid, trackSet PPTreeSubSet)
 				a.done = true
 			}
 		}
-		Akqueue = SetKey{}
+		Akqueue.Clear()
 	}
 
 	return δ, δtrack, nil