From 7fc13b66fda82da836a8b5dbffb310cdb1a4fec7 Mon Sep 17 00:00:00 2001
From: abdulrehmank <abdulrehmankhairdi@hotmail.com>
Date: Thu, 8 Jun 2017 12:39:47 +0530
Subject: [PATCH] undefined error

remainingLines[remainingLinesIndex] sometimes give undefined and the build gets failed
---
 lib/source-node.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/source-node.js b/lib/source-node.js
index d196a53f..55d8afba 100644
--- a/lib/source-node.js
+++ b/lib/source-node.js
@@ -97,7 +97,7 @@ SourceNode.fromStringWithSourceMap =
           // There is no new line in between.
           // Associate the code between "lastGeneratedColumn" and
           // "mapping.generatedColumn" with "lastMapping"
-          var nextLine = remainingLines[remainingLinesIndex];
+          var nextLine = remainingLines[remainingLinesIndex] == undefined ? '' : remainingLines[remainingLinesIndex];
           var code = nextLine.substr(0, mapping.generatedColumn -
                                         lastGeneratedColumn);
           remainingLines[remainingLinesIndex] = nextLine.substr(mapping.generatedColumn -
@@ -117,7 +117,7 @@ SourceNode.fromStringWithSourceMap =
         lastGeneratedLine++;
       }
       if (lastGeneratedColumn < mapping.generatedColumn) {
-        var nextLine = remainingLines[remainingLinesIndex];
+        var nextLine = remainingLines[remainingLinesIndex] == undefined ? '' : remainingLines[remainingLinesIndex];
         node.add(nextLine.substr(0, mapping.generatedColumn));
         remainingLines[remainingLinesIndex] = nextLine.substr(mapping.generatedColumn);
         lastGeneratedColumn = mapping.generatedColumn;