FIX: Nokogiri bugs in certain environments

Gemfile.lock

@@ -246,6 +246,7 @@ GEM
     metaclass (0.0.1)
     method_source (0.8.1)
     mime-types (1.23)
+    mini_portile (0.5.1)
     minitest (4.7.3)
     mocha (0.13.3)
       metaclass (~> 0.0.1)
@@ -256,7 +257,8 @@ GEM
     net-scp (1.1.2)
       net-ssh (>= 2.6.5)
     net-ssh (2.6.8)
-    nokogiri (1.5.9)
+    nokogiri (1.6.0)
+      mini_portile (~> 0.5.0)
     oauth (0.4.7)
     oauth2 (0.8.1)
       faraday (~> 0.8)
@@ -390,8 +392,8 @@ GEM
       rspec-mocks (~> 2.13.0)
     ruby-hmac (0.4.0)
     ruby-openid (2.2.3)
-    sanitize (2.0.3)
-      nokogiri (>= 1.4.4, < 1.6)
+    sanitize (2.0.6)
+      nokogiri (>= 1.4.4)
     sass (3.2.8)
     sass-rails (3.2.6)
       railties (~> 3.2.0)

app/models/post_analyzer.rb

@@ -95,8 +95,8 @@ class PostAnalyzer
 
     # Don't include @mentions in the link count
     @raw_links = []
-    cooked_document.search("a[href]").each do |l|
-      next if link_is_a_mention?(l)
+    cooked_document.search("a").each do |l|
+      next if l.attributes['href'].nil? || link_is_a_mention?(l)
       url = l.attributes['href'].to_s
       @raw_links << url
     end