From 673604b374788b674a07c080829cde633f5d27df Mon Sep 17 00:00:00 2001
From: Sam Saccone <samccone@gmail.com>
Date: Tue, 8 Sep 2015 09:26:09 -0700
Subject: [PATCH] :hammer: Harden unwrapping logic.

No longer bombs for non-compliant files.
---
 utils/uniffe.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/utils/uniffe.js b/utils/uniffe.js
index da6ccab0..7b67e4ab 100644
--- a/utils/uniffe.js
+++ b/utils/uniffe.js
@@ -34,7 +34,8 @@ function uniffe(contents) {
 
   escodegen.attachComments(ast, comments, tokens);
 
-  if (ast.body[0].expression.callee === undefined) {
+  if (ast.body[0].expression === undefined ||
+      ast.body[0].expression.callee === undefined) {
     return contents;
   }