From aa8d701f76fc5dbe4a02634ab0eba281de4be626 Mon Sep 17 00:00:00 2001
From: Sashko Stubailo <s.stubailo@gmail.com>
Date: Tue, 13 Jan 2015 14:33:36 -0800
Subject: [PATCH] Catch undefined

---
 tools/compiler.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/compiler.js b/tools/compiler.js
index d483bf6f21..f54580bb25 100644
--- a/tools/compiler.js
+++ b/tools/compiler.js
@@ -325,6 +325,11 @@ var compileUnibuild = function (options) {
   };
 
   var convertSourceMapPaths = function (sourcemap, f) {
+    if (! sourcemap) {
+      // Don't try to convert it if it doesn't exist
+      return sourcemap;
+    }
+
     var srcmap = JSON.parse(sourcemap);
     srcmap.sources = _.map(srcmap.sources, f);
     return JSON.stringify(srcmap);