From 87dd5c5bd077f67631a0103ea8db3d16fb2c9055 Mon Sep 17 00:00:00 2001
From: Tomas Doran <tdoran@yelp.com>
Date: Wed, 4 Nov 2015 04:23:13 -0800
Subject: [PATCH] Fix panic I see when upgrading to 0.6.6

Check if the policy is nil or not before type casting it
---
 builtin/providers/aws/resource_aws_sns_topic.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/builtin/providers/aws/resource_aws_sns_topic.go b/builtin/providers/aws/resource_aws_sns_topic.go
index 6a1c46590..26e98a9b1 100644
--- a/builtin/providers/aws/resource_aws_sns_topic.go
+++ b/builtin/providers/aws/resource_aws_sns_topic.go
@@ -47,7 +47,10 @@ func resourceAwsSnsTopic() *schema.Resource {
 				ForceNew: false,
 				Computed: true,
 				StateFunc: func(v interface{}) string {
-					jsonb := []byte(v.(string))
+					jsonb := []byte{}
+					if v != nil {
+						jsonb = []byte(v.(string))
+					}
 					buffer := new(bytes.Buffer)
 					if err := json.Compact(buffer, jsonb); err != nil {
 						log.Printf("[WARN] Error compacting JSON for Policy in SNS Topic")