terraform: Destroy node should only include deposed for specific index

Fixes #10338

The destruction step for a resource was included the deposed resources
for _all_ resources with that name (ignoring the "index"). For example:
`aws_instance.foo.0` was including destroying deposed for
`aws_instance.foo.1`.

This changes the config to the deposed transformer to properly include
that index.

This change includes a larger change of changing `stateId` to include
the index. This affected more parts but was ultimately the issue in
question.

terraform/node_resource_apply.go

@@ -23,9 +23,6 @@ func (n *NodeApplyableResource) EvalTree() EvalNode {
 
 	// stateId is the ID to put into the state
 	stateId := addr.stateId()
-	if addr.Index > -1 {
-		stateId = fmt.Sprintf("%s.%d", stateId, addr.Index)
-	}
 
 	// Build the instance info. More of this will be populated during eval
 	info := &InstanceInfo{

terraform/node_resource_destroy.go

@@ -48,7 +48,7 @@ func (n *NodeDestroyResource) References() []string {
 // GraphNodeDynamicExpandable
 func (n *NodeDestroyResource) DynamicExpand(ctx EvalContext) (*Graph, error) {
 	// If we have no config we do nothing
-	if n.Config == nil {
+	if n.Addr == nil {
 		return nil, nil
 	}
 
@@ -62,7 +62,7 @@ func (n *NodeDestroyResource) DynamicExpand(ctx EvalContext) (*Graph, error) {
 	// We want deposed resources in the state to be destroyed
 	steps = append(steps, &DeposedTransformer{
 		State: state,
-		View:  n.Config.Id(),
+		View:  n.Addr.stateId(),
 	})
 
 	// Target
@@ -85,9 +85,6 @@ func (n *NodeDestroyResource) DynamicExpand(ctx EvalContext) (*Graph, error) {
 func (n *NodeDestroyResource) EvalTree() EvalNode {
 	// stateId is the ID to put into the state
 	stateId := n.Addr.stateId()
-	if n.Addr.Index > -1 {
-		stateId = fmt.Sprintf("%s.%d", stateId, n.Addr.Index)
-	}
 
 	// Build the instance info. More of this will be populated during eval
 	info := &InstanceInfo{

terraform/node_resource_destroy_test.go

@@ -0,0 +1,67 @@
+package terraform
+
+import (
+	"strings"
+	"sync"
+	"testing"
+)
+
+func TestNodeDestroyResourceDynamicExpand_deposedCount(t *testing.T) {
+	var stateLock sync.RWMutex
+	state := &State{
+		Modules: []*ModuleState{
+			&ModuleState{
+				Path: rootModulePath,
+				Resources: map[string]*ResourceState{
+					"aws_instance.bar.0": &ResourceState{
+						Type: "aws_instance",
+						Deposed: []*InstanceState{
+							&InstanceState{
+								ID: "foo",
+							},
+						},
+					},
+					"aws_instance.bar.1": &ResourceState{
+						Type: "aws_instance",
+						Deposed: []*InstanceState{
+							&InstanceState{
+								ID: "bar",
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	addr, err := parseResourceAddressInternal("aws_instance.bar.0")
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	m := testModule(t, "apply-cbd-count")
+	n := &NodeDestroyResource{
+		NodeAbstractResource: &NodeAbstractResource{
+			Addr:          addr,
+			ResourceState: state.Modules[0].Resources["aws_instance.bar.0"],
+			Config:        m.Config().Resources[0],
+		},
+	}
+
+	g, err := n.DynamicExpand(&MockEvalContext{
+		PathPath:   []string{"root"},
+		StateState: state,
+		StateLock:  &stateLock,
+	})
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	actual := strings.TrimSpace(g.String())
+	expected := strings.TrimSpace(`
+aws_instance.bar.0 (deposed #0)
+`)
+	if actual != expected {
+		t.Fatalf("bad:\n\n%s", actual)
+	}
+}

terraform/node_resource_plan_destroy.go

@@ -1,9 +1,5 @@
 package terraform
 
-import (
-	"fmt"
-)
-
 // NodePlanDestroyableResource represents a resource that is "applyable":
 // it is ready to be applied and is represented by a diff.
 type NodePlanDestroyableResource struct {
@@ -21,9 +17,6 @@ func (n *NodePlanDestroyableResource) EvalTree() EvalNode {
 
 	// stateId is the ID to put into the state
 	stateId := addr.stateId()
-	if addr.Index > -1 {
-		stateId = fmt.Sprintf("%s.%d", stateId, addr.Index)
-	}
 
 	// Build the instance info. More of this will be populated during eval
 	info := &InstanceInfo{

terraform/node_resource_plan_instance.go

@@ -19,9 +19,6 @@ func (n *NodePlannableResourceInstance) EvalTree() EvalNode {
 
 	// stateId is the ID to put into the state
 	stateId := addr.stateId()
-	if addr.Index > -1 {
-		stateId = fmt.Sprintf("%s.%d", stateId, addr.Index)
-	}
 
 	// Build the instance info. More of this will be populated during eval
 	info := &InstanceInfo{

terraform/node_resource_plan_orphan.go

@@ -1,9 +1,5 @@
 package terraform
 
-import (
-	"fmt"
-)
-
 // NodePlannableResourceOrphan represents a resource that is "applyable":
 // it is ready to be applied and is represented by a diff.
 type NodePlannableResourceOrphan struct {
@@ -20,9 +16,6 @@ func (n *NodePlannableResourceOrphan) EvalTree() EvalNode {
 
 	// stateId is the ID to put into the state
 	stateId := addr.stateId()
-	if addr.Index > -1 {
-		stateId = fmt.Sprintf("%s.%d", stateId, addr.Index)
-	}
 
 	// Build the instance info. More of this will be populated during eval
 	info := &InstanceInfo{

terraform/resource_address.go

@@ -102,6 +102,9 @@ func (r *ResourceAddress) stateId() string {
 	default:
 		panic(fmt.Errorf("unknown resource mode: %s", r.Mode))
 	}
+	if r.Index >= 0 {
+		result += fmt.Sprintf(".%d", r.Index)
+	}
 
 	return result
 }

terraform/resource_address_test.go

@@ -571,7 +571,7 @@ func TestResourceAddressStateId(t *testing.T) {
 			"aws_instance.foo",
 		},
 
-		"basic resource ignores count": {
+		"basic resource with index": {
 			&ResourceAddress{
 				Mode:         config.ManagedResourceMode,
 				Type:         "aws_instance",
@@ -579,7 +579,7 @@ func TestResourceAddressStateId(t *testing.T) {
 				InstanceType: TypePrimary,
 				Index:        2,
 			},
-			"aws_instance.foo",
+			"aws_instance.foo.2",
 		},
 
 		"data resource": {