From 2eae9f8a3f6bc68ae2f9893cc5d82eeb75f88153 Mon Sep 17 00:00:00 2001
From: Jan de Mooij <jdemooij@mozilla.com>
Date: Thu, 10 Dec 2015 13:22:14 -0500
Subject: [PATCH] Bug 1231224 part 4 - Fix TokenStream::getDirective to check
 append() return value. r=jwalden

---
 js/src/frontend/TokenStream.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/js/src/frontend/TokenStream.cpp b/js/src/frontend/TokenStream.cpp
index 709d99bb8cd8..c4ecd668f317 100644
--- a/js/src/frontend/TokenStream.cpp
+++ b/js/src/frontend/TokenStream.cpp
@@ -877,13 +877,15 @@ TokenStream::getDirective(bool isMultiline, bool shouldWarnDeprecated,
                 ungetChar('*');
                 break;
             }
-            tokenbuf.append(c);
+            if (!tokenbuf.append(c))
+                return false;
         }
 
-        if (tokenbuf.empty())
+        if (tokenbuf.empty()) {
             // The directive's URL was missing, but this is not quite an
             // exception that we should stop and drop everything for.
             return true;
+        }
 
         size_t length = tokenbuf.length();