terraform: interpolation for multi-var checks both ".0" and "" suffix

terraform/context_apply_test.go

@@ -1783,6 +1783,8 @@ func TestContext2Apply_multiVar(t *testing.T) {
 			t.Fatalf("err: %s", err)
 		}
 
+		t.Logf("End state: %s", state.String())
+
 		actual := state.RootModule().Outputs["output"]
 		if actual == nil {
 			t.Fatal("missing output")

terraform/node_output.go

@@ -37,6 +37,10 @@ func (n *NodeApplyableOutput) ReferenceableName() []string {
 func (n *NodeApplyableOutput) References() []string {
 	var result []string
 	result = append(result, ReferencesFromConfig(n.Config.RawConfig)...)
+	for _, v := range result {
+		result = append(result, v+".destroy")
+	}
+
 	return result
 }
 

terraform/node_resource_destroy.go

@@ -30,7 +30,12 @@ func (n *NodeDestroyResource) CreateBeforeDestroy() bool {
 
 // GraphNodeReferenceable, overriding NodeAbstractResource
 func (n *NodeDestroyResource) ReferenceableName() []string {
-	return nil
+	result := n.NodeAbstractResource.ReferenceableName()
+	for i, v := range result {
+		result[i] = v + ".destroy"
+	}
+
+	return result
 }
 
 // GraphNodeReferencer, overriding NodeAbstractResource