From 409b0a0ab557dcc146e3123e976a4634f3d05877 Mon Sep 17 00:00:00 2001
From: Sytse Sijbrandij <sytse@dosire.com>
Date: Sun, 9 Jun 2013 21:30:20 +0200
Subject: [PATCH] Fix pygment lexer 500 errors when an alias is used instead of
 a name.

---
 lib/redcarpet/render/gitlab_html.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/redcarpet/render/gitlab_html.rb b/lib/redcarpet/render/gitlab_html.rb
index 4f2c86e2d4..318adbf189 100644
--- a/lib/redcarpet/render/gitlab_html.rb
+++ b/lib/redcarpet/render/gitlab_html.rb
@@ -11,7 +11,8 @@ class Redcarpet::Render::GitlabHTML < Redcarpet::Render::HTML
 
   def block_code(code, language)
     options = { options: {encoding: 'utf-8'} }
-    options.merge!(lexer: language.downcase) if Pygments::Lexer.find(language)
+    lexer = Pygments::Lexer.find(language) # language can be an alias
+    options.merge!(lexer: lexer.name.downcase) if lexer # downcase is required
 
     # New lines are placed to fix an rendering issue
     # with code wrapped inside <h1> tag for next case:
-- 
2.30.9