From bb17aecf7aa58cfaff15e5f39ca207353b0cf354 Mon Sep 17 00:00:00 2001
From: sjhuang26 <sjhuang26@gmail.com>
Date: Fri, 29 Dec 2017 09:39:19 -0500
Subject: [PATCH] Fix concat bug

---
 src/lib/blocks.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib/blocks.js b/src/lib/blocks.js
index d19adf3af..67fd42e00 100644
--- a/src/lib/blocks.js
+++ b/src/lib/blocks.js
@@ -45,7 +45,7 @@ export default function (vm) {
     const backdropsMenu = function () {
         if (vm.runtime.targets[0] && vm.runtime.targets[0].sprite.costumes.length > 0) {
             return vm.runtime.targets[0].sprite.costumes.map(costume => [costume.name, costume.name])
-                .concat(['next backdrop', '_nextBackdrop_'], ['previous backdrop', '_prevBackdrop_']);
+                .concat([['next backdrop', '_nextBackdrop_'], ['previous backdrop', '_prevBackdrop_']]);
         }
         return [['', '']];
     };