Uncaught TypeError: Cannot read property 'getStartBufferPosition' of undefined

[TokenJan]

[Enter steps to reproduce:]

1. ...
2. ...

Atom: 1.16.0 x64
Electron: 1.3.13
OS: "Red Hat
Thrown From: nav-panel-plus package 0.3.0

Stack Trace

Uncaught TypeError: Cannot read property 'getStartBufferPosition' of undefined

At /home/yang/.atom/packages/nav-panel-plus/lib/nav-view.coffee:218

TypeError: Cannot read property 'getStartBufferPosition' of undefined
    at /packages/nav-panel-plus/lib/nav-view.coffee:218:48)
    at Function.each (/packages/nav-panel-plus/node_modules/jquery/dist/jquery.js:365:19)
    at jQuery.each (/packages/nav-panel-plus/node_modules/jquery/dist/jquery.js:137:17)
    at /packages/nav-panel-plus/lib/nav-view.coffee:217:36)
    at Function.each (/packages/nav-panel-plus/node_modules/jquery/dist/jquery.js:365:19)
    at jQuery.each (/packages/nav-panel-plus/node_modules/jquery/dist/jquery.js:137:17)
    at NavView.module.exports.NavView.getPanelState (/packages/nav-panel-plus/lib/nav-view.coffee:211:12)
    at NavView.module.exports.NavView.saveFileState (/packages/nav-panel-plus/lib/nav-view.coffee:275:14)
    at /packages/nav-panel-plus/lib/nav-panel.coffee:90:18
    at Function.module.exports.Emitter.simpleDispatch (/app.asar/node_modules/event-kit/lib/emitter.js:25:14)
    at Emitter.module.exports.Emitter.emit (/app.asar/node_modules/event-kit/lib/emitter.js:129:28)
    at PaneContainer.module.exports.PaneContainer.willDestroyPaneItem (/app.asar/src/pane-container.js:300:27)
    at Pane.module.exports.Pane.destroyItem (/app.asar/src/pane.js:651:16)
    at TabBarView.module.exports.TabBarView.closeTab (/app.asar/node_modules/tabs/lib/tab-bar-view.js:333:26)
    at HTMLDivElement.TabView.didClickCloseIcon (/app.asar/node_modules/tabs/lib/tab-bar-view.js:222:19)

Commands

     -2:06.1.0 window:toggle-full-screen (input.hidden-input)
     -0:18.8.0 core:cancel (ul.list-inline.tab-bar.inset-panel)
     -0:13.4.0 core:save (input.hidden-input)
  2x -0:10.6.0 nav-panel-plus:toggle (input.hidden-input)

Non-Core Packages

javascript-snippets 1.2.1 
markdown-preview-enhanced 0.12.3 
markdown-preview-plus 2.4.9 
mathjax-wrapper 0.1.0 
minimap 4.28.2 
nav-panel-plus 0.3.0