Meteor: "exception in template helper" -

i have basic post stream running in meteor pulls posts collection. template feed following template helper reaches collection:

    template.poststream.helpers({         /* supplies posts collection client         *  view. */         postsstream: function(){             var loggeduser = meteor.user();             return posts.find({ userid: loggeduser._id });         },      }); 

the helper seems work fine , posts appear expected. however, vague error in console , can't work out how clear it: exception in template helper: postsstream@http://localhost:3000/client/views/stream/post-stream.js?37c902af708ff817888efc24c4e45f352cfb6884:6:41

character 6:41 corresponds midway through loggeduser._id string. what's going on?

when first running application, helper executed meteor.user() returning null because login resume process takes few milliseconds.

you need guard prevent access loggeduser._id, otherwise you'll exception.

return posts.find({ userid: loggeduser && loggeduser._id });