got [object Object] for inputNodes[1] about broccoli-plugin HOT 6 CLOSED

node:{ 
    inputTree: Funnel {,
        _name: 'Funnel',
        _annotation: 'Funnel: Filtered App',
        _baseConstructorCalled: true,
        _inputNodes: [Array],
        _persistentOutput: true,
        _needsCache: false,
        _includeFileCache: {},
        _destinationPathCache: {},
        _currentTree: [FSTree],
        _isRebuild: false,
        exclude: [Array],
        annotation: 'Funnel: Filtered App',
        destDir: '/',
        count: 0,
        _matchedWalk: true,
        _instantiatedStack:
        'at new Funnel (
            node_modules/ember-cli/node_modules/broccoli-funnel/index.js:104:30)\n    
            at EmberApp._filterAppTree (//node_modules/ember-cli/lib/broccoli/ember-app.js:648:31)\n 
            at EmberApp._processedAppTree (//node_modules/ember-cli/lib/broccoli/ember-app.js:762:54)\n    
            at EmberApp.appAndDependencies (//node_modules/ember-cli/lib/broccoli/ember-app.js:1036:10)\n    
            at EmberApp.javascript (//node_modules/ember-cli/lib/broccoli/ember-app.js:1159:34)\n    
            at EmberApp.toArray (//node_modules/ember-cli/lib/broccoli/ember-app.js:1564:10)\n    
            at EmberApp.toTree (//node_modules/ember-cli/lib/broccoli/ember-app.js:1586:30)\n    
            at module.exports (//ember-cli-build.js:45:28)\n    
            at Class.setupBroccoliBuilder (//node_modules/ember-cli/lib/models/builder.js:55:19)\n    
            at Class.init (//node_modules/ember-cli/lib/models/builder.js:89:10)'
            _buildStart: undefined 
        },
        rebuild: [Function: rebuild] 
    } 
}