Further isolate unstructured with factories.

pkg/transformers/multitransformer.go

@@ -18,6 +18,7 @@ package transformers
 
 import (
 	"fmt"
+	"sigs.k8s.io/kustomize/pkg/resource"
 
 	"sigs.k8s.io/kustomize/pkg/resmap"
 )
@@ -26,6 +27,7 @@ import (
 type multiTransformer struct {
 	transformers         []Transformer
 	checkConflictEnabled bool
+	rf                   *resource.Factory
 }
 
 var _ Transformer = &multiTransformer{}
@@ -69,7 +71,7 @@ func (o *multiTransformer) transform(m resmap.ResMap) error {
 // A spot check to perform when the transformations are supposed to be commutative.
 // Fail if there's a difference in the result.
 func (o *multiTransformer) transformWithCheckConflict(m resmap.ResMap) error {
-	mcopy := m.DeepCopy()
+	mcopy := m.DeepCopy(o.rf)
 	err := o.transform(m)
 	if err != nil {
 		return err