Ember transition problem

ember_transition_problem.js

///// Problematic code

{{#each module in controller}}
  {{#link-to 'forge-module.show' module}} // <-- here "is" my problem
    {{module.name}}
  {{/link-to}}
{{/each}}

// Created HTML:

<a id="ember560" class="ember-view" href="#/forge-module/show/stdlib">
  <script id="metamorph-23-start" type="text/x-placeholder"></script>stdlib<script id="metamorph-23-end" type="text/x-placeholder"></script>
</a>

///// ^^ This does not work, when link is cliked, console shows following error:

Attempting transition to forge-module.show ember.js:3886
Transition #2: forge-module.show: calling beforeModel hook ember.js:3886
Transition #2: forge-module.show: forge-module.show: resolving provided model ember.js:3886
Transition #2: forge-module.show: calling afterModel hook ember.js:3886
Transition #2: Resolved all models on destination route; finalizing transition. ember.js:3886
Error while loading route: Error: Assertion Failed: ArrayProxy expects an Array or Ember.ArrayProxy, but you passed object
    at new Error (native)
    at Error.EmberError (http://0.0.0.0:9876/module_management/scripts/vendor.js:10:9297)
    at Object.Ember.assert (http://0.0.0.0:9876/module_management/scripts/vendor.js:9:13984)
    at EmberObject.extend._setupArrangedContent (http://0.0.0.0:9876/module_management/scripts/vendor.js:16:9360)
    at null._arrangedContentDidChange (http://0.0.0.0:9876/module_management/scripts/vendor.js:16:9134)
    at applyStr (http://0.0.0.0:9876/module_management/scripts/vendor.js:12:8397)
    at sendEvent (http://0.0.0.0:9876/module_management/scripts/vendor.js:10:14427)
    at notifyObservers (http://0.0.0.0:9876/module_management/scripts/vendor.js:11:24149)
    at propertyDidChange (http://0.0.0.0:9876/module_management/scripts/vendor.js:11:21858)
    at iterDeps (http://0.0.0.0:9876/module_management/scripts/vendor.js:11:22608) ember.js:3886
Transition #2: forge-module.show: transition was aborted 

///// However this works flawlessly. Transition to different template works:
{{#each module in controller}}
  {{#link-to 'forge-module.show' 'direct-module-name'}}
    {{module.name}}
  {{/link-to}}
{{/each}}

// Created HTML:

<a id="ember548" class="ember-view" href="#/forge-module/show/direct-module-name">
  <script id="metamorph-19-start" type="text/x-placeholder"></script>stdlib<script id="metamorph-19-end" type="text/x-placeholder"></script>
</a>

///// Also this works. But this does not really follow Ember manual: http://emberjs.com/guides/templates/links/
{{#each module in controller}}
  {{#link-to 'forge-module.show' module.name}} // <-- We use .name as id
    {{module.name}}
  {{/link-to}}
{{/each}}

// Created HTML:

<a id="ember550" class="ember-view" href="#/forge-module/show/stdlib">
  <script id="metamorph-19-start" type="text/x-placeholder"></script>stdlib<script id="metamorph-19-end" type="text/x-placeholder"></script>
</a>

///// Router:
App.ForgeModuleShowRoute = Ember.Route.extend({
  model: function(resource) {
    return App.ForgeModuleDetail.find(resource);
  }
});

///// Controller:
App.ForgeModuleShowController = Em.ArrayController.extend({
  versionToInstall: null,
});

///// Model:
App.ForgeModuleDetail = Em.Model.extend({
  name:              Em.attr(),
  description:       Em.attr(),
  version:           Em.attr(),
  author:            Em.attr(),
  availableVersions: Em.attr(),
  operatingSystems:  Em.attr(),
  homepage:          Em.attr(),
  bugtracker:        Em.attr()
});
App.ForgeModuleDetail.url = ENV.restBaseUrl + 'forge-module/show';
App.ForgeModuleDetail.primaryKey = 'name';
App.ForgeModuleDetail.adapter = Em.RESTAdapter.create();

///// Application router:
App.Router.map(function () {
  this.resource('forge-module', function() {
    this.route('list');
    this.route('show', { path: '/show/:name' });
  });
});