From 38ea813b0ea950cf34d5bfde04c23191c70a2c13 Mon Sep 17 00:00:00 2001
From: Aidan Woods <aidantwoods@gmail.com>
Date: Thu, 5 Apr 2018 16:54:35 +0100
Subject: [PATCH 1/2] Add failing test case

---
 test/data/fenced_code_block.html | 5 ++++-
 test/data/fenced_code_block.md   | 8 +++++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/test/data/fenced_code_block.html b/test/data/fenced_code_block.html
index 565a541..78480fd 100644
--- a/test/data/fenced_code_block.html
+++ b/test/data/fenced_code_block.html
@@ -8,4 +8,7 @@ echo $message;</code></pre>
 <pre><code class="language-html+php">&lt;?php
 echo "Hello World";
 ?&gt;
-&lt;a href="http://auraphp.com" &gt;Aura Project&lt;/a&gt;</code></pre>
\ No newline at end of file
+&lt;a href="http://auraphp.com" &gt;Aura Project&lt;/a&gt;</code></pre>
+<pre><code>the following isn't quite enough to close
+```
+still a fenced code block</code></pre>
\ No newline at end of file
diff --git a/test/data/fenced_code_block.md b/test/data/fenced_code_block.md
index 62db24a..35acb75 100644
--- a/test/data/fenced_code_block.md
+++ b/test/data/fenced_code_block.md
@@ -22,4 +22,10 @@ echo 'language identifier with non words';
 echo "Hello World";
 ?>
 <a href="http://auraphp.com" >Aura Project</a>
-```
\ No newline at end of file
+```
+
+````
+the following isn't quite enough to close
+```
+still a fenced code block
+````
\ No newline at end of file

From 06b810cd4a4e139d7367c70dc1470d6a7f1c06bb Mon Sep 17 00:00:00 2001
From: Aidan Woods <aidantwoods@gmail.com>
Date: Thu, 5 Apr 2018 16:55:14 +0100
Subject: [PATCH 2/2] Fix fenced code block closer to match CommonMark rules

---
 Parsedown.php | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/Parsedown.php b/Parsedown.php
index 186896c..ee38601 100755
--- a/Parsedown.php
+++ b/Parsedown.php
@@ -443,16 +443,16 @@ class Parsedown
 
     protected function blockFencedCode($Line)
     {
-        if (preg_match('/^['.$Line['text'][0].']{3,}[ ]*([^`]+)?[ ]*$/', $Line['text'], $matches))
+        if (preg_match('/^(['.$Line['text'][0].']{3,})[ ]*([^`]+)?[ ]*$/', $Line['text'], $matches))
         {
             $Element = array(
                 'name' => 'code',
                 'text' => '',
             );
 
-            if (isset($matches[1]))
+            if (isset($matches[2]))
             {
-                $class = 'language-'.$matches[1];
+                $class = 'language-'.$matches[2];
 
                 $Element['attributes'] = array(
                     'class' => $class,
@@ -461,6 +461,7 @@ class Parsedown
 
             $Block = array(
                 'char' => $Line['text'][0],
+                'openerLength' => mb_strlen($matches[1]),
                 'element' => array(
                     'name' => 'pre',
                     'element' => $Element,
@@ -485,8 +486,10 @@ class Parsedown
             unset($Block['interrupted']);
         }
 
-        if (preg_match('/^'.$Block['char'].'{3,}[ ]*$/', $Line['text']))
-        {
+        if (
+            preg_match('/^(['.preg_quote($Block['char']).']{3,})[ ]*$/', $Line['text'], $matches)
+            and mb_strlen($matches[1]) >= $Block['openerLength']
+        ) {
             $Block['element']['element']['text'] = substr($Block['element']['element']['text'], 1);
 
             $Block['complete'] = true;