terraform: orphan resources in old graph need unique ID

terraform/context.go

@@ -435,7 +435,7 @@ func (c *Context) Apply() (*State, error) {
 	}
 
 	// Walk the graph
-	walker, err := c.walk(real, shadow, operation)
+	walker, err := c.walk(real, real, operation)
 	if len(walker.ValidationErrors) > 0 {
 		err = multierror.Append(err, walker.ValidationErrors...)
 	}

terraform/shadow_resource_provider.go

@@ -510,7 +510,7 @@ func (p *shadowResourceProviderShadow) Apply(
 		p.ErrorLock.Lock()
 		defer p.ErrorLock.Unlock()
 		p.Error = multierror.Append(p.Error, fmt.Errorf(
-			"Unknown 'apply' shadow value: %#v", raw))
+			"Unknown 'apply' shadow value for %q: %#v", key, raw))
 		return nil, nil
 	}
 

terraform/transform_orphan.go

@@ -209,6 +209,8 @@ func (n *graphNodeOrphanResource) EvalTree() EvalNode {
 
 	// Build instance info
 	info := &InstanceInfo{Id: n.ResourceKey.String(), Type: n.ResourceKey.Type}
+	info.uniqueExtra = "destroy"
+
 	seq.Nodes = append(seq.Nodes, &EvalInstanceInfo{Info: info})
 
 	// Each resource mode has its own lifecycle