code: function blockHelperMissingHelper(path) {
        if (!resolveHelper) { resolveHelper = requireModule('ember-handlebars/helpers/binding')['resolveHelper']; } // ES6TODO: stupid circular dep
  
        var options = arguments[arguments.length - 1];
  
        Ember.assert("`blockHelperMissing` was invoked without a helper name, which " +
                     "is most likely due to a mismatch between the version of " +
                     "Ember.js you're running now and the one used to precompile your " +
                     "templates. Please make sure the version of " +
                     "`ember-handlebars-compiler` you're using is up to date.", path);
  
        var helper = resolveHelper(options.data.view.container, path);
  
        if (helper) {
          return helper.apply(this, slice.call(arguments, 1));
        } else {
          return helpers.helperMissing.call(this, path);
        }
      }
docs: Registers a helper in Handlebars that will be called if no property with the
  given name can be found on the current context object, and no helper with
  that name is registered.
  
  This throws an exception with a more helpful error message so the user can
  track down where the problem is happening.
  
  @private
  @method helperMissing
  @for Ember.Handlebars.helpers
  @param {String} path
  @param {Hash} options