FIX: Invalid Unicode in preload store JSON

app/helpers/application_helper.rb

@@ -19,6 +19,14 @@ module ApplicationHelper
     end
   end
 
+  def escape_unicode(javascript)
+    if javascript
+      javascript.gsub(/\342\200\250/u, '&#x2028;').gsub(/(<\/)/u, '\u003C/').html_safe
+    else
+      ''
+    end
+  end
+
   def with_format(format, &block)
     old_formats = formats
     self.formats = [format]

app/views/layouts/application.html.erb

@@ -59,7 +59,7 @@
     <%- if @preloaded.present? %>
       <script>
       <%- @preloaded.each do |key, json| %>
-        PreloadStore.store("<%= key %>",<%= raw json %>);
+        PreloadStore.store("<%= key %>",<%= escape_unicode(json) %>);
       <% end %>
       </script>
     <%- end %>