title: Meteor: "exception in template helper"
body: <p>I have a basic post stream running in Meteor that pulls from the <code>Posts</code> collection. The template is feed by the following template helper that reaches into the collection:</p>
  
  <pre><code>    Template.postStream.helpers({
          /* Supplies posts collection to the client
          *  view. */
          postsStream: function(){
              var loggedUser = Meteor.user();
              return Posts.find({ userID: loggedUser._id });
          },
  
      });
  </code></pre>
  
  <p>The helper seems to all work fine and the posts appear as expected. However, I get this vague error in the console and I can't work out how to clear it:
  <code>Exception in template helper: postsStream@http://localhost:3000/client/views/stream/post-stream.js?37c902af708ff817888efc24c4e45f352cfb6884:6:41</code></p>
  
  <p>Character 6:41 corresponds to midway through the <code>loggedUser._id</code> string. What's going on?</p>