From 0d1fe4e99639ab5eea90f29db5ef88c9658767de Mon Sep 17 00:00:00 2001
From: Robin Ward <robin.ward@gmail.com>
Date: Fri, 12 Sep 2014 13:18:05 -0400
Subject: [PATCH] FIX: Long inline links without closing parens could get V8
 stuck in an infinite loop.

---
 src/dialects/gruber.js                     | 12 +++++++-----
 test/features/links/missing_end_paren.json |  5 +++++
 test/features/links/missing_end_paren.text |  1 +
 3 files changed, 13 insertions(+), 5 deletions(-)
 create mode 100644 test/features/links/missing_end_paren.json
 create mode 100644 test/features/links/missing_end_paren.text

diff --git a/src/dialects/gruber.js b/src/dialects/gruber.js
index ab3326de..ad3a6a76 100644
--- a/src/dialects/gruber.js
+++ b/src/dialects/gruber.js
@@ -664,11 +664,13 @@ define(['../markdown_helpers', './dialect_helpers', '../parser'], function (Mark
           return [ consumed, link ];
         }
 
-        m = text.match(new RegExp("^\\((" + urlRegexp + ")\\)"));
-        if (m && m[1]) {
-          consumed += m[0].length;
-          link = ["link", {href: m[1]}].concat(children);
-          return [consumed, link];
+        if (text.indexOf('(') === 0 && text.indexOf(')') !== -1) {
+          m = text.match(new RegExp("^\\((" + urlRegexp + ")\\)"));
+          if (m && m[1]) {
+            consumed += m[0].length;
+            link = ["link", {href: m[1]}].concat(children);
+            return [consumed, link];
+          }
         }
 
         // [Alt text][id]
diff --git a/test/features/links/missing_end_paren.json b/test/features/links/missing_end_paren.json
new file mode 100644
index 00000000..dd6b7b2f
--- /dev/null
+++ b/test/features/links/missing_end_paren.json
@@ -0,0 +1,5 @@
+["html",
+  ["p",
+    "an inline link [like this](http://googlewebmastercentral.blogspot.ca/2014/05/understanding-web-pages-better.html can crash V8."
+  ]
+]
diff --git a/test/features/links/missing_end_paren.text b/test/features/links/missing_end_paren.text
new file mode 100644
index 00000000..a6a5ea3e
--- /dev/null
+++ b/test/features/links/missing_end_paren.text
@@ -0,0 +1 @@
+an inline link [like this](http://googlewebmastercentral.blogspot.ca/2014/05/understanding-web-pages-better.html can crash V8.