Uncaught TypeError: First argument must be a string, Buffer, ArrayBuffer, Array, or array-like ob...

[Fossa]

Steps to reproduce

1. Open new atom window.
2. Drag'n'drop plantUML view to second window. (Doesn't show any content)
3. Close other tabs in the new window.

Atom: 1.14.4 x64
Electron: 1.3.13
OS: Ubuntu 16.04.2
Thrown From: plantuml-viewer package 0.7.1

Stack Trace

Uncaught TypeError: First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.

At buffer.js:259

TypeError: First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.
    at fromObject (buffer.js:259:9)
    at Function.Buffer.from (buffer.js:96:10)
    at new Buffer (buffer.js:75:17)
    at PlantumlViewerEditor.getBuffer (/packages/plantuml-viewer/lib/plantuml-viewer-editor.js:67:10)
    at /app.asar/node_modules/status-bar/lib/status-bar-view.js:115:112)
    at /app.asar/node_modules/status-bar/lib/status-bar-view.js:38:17
    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 /app.asar/src/pane-container.js:348:27
    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 Pane.module.exports.Pane.setActiveItem (/app.asar/src/pane.js:300:22)
    at Pane.module.exports.Pane.activateItemAtIndex (/app.asar/src/pane.js:435:19)
    at Pane.module.exports.Pane.activateNextItem (/app.asar/src/pane.js:390:21)
    at Pane.module.exports.Pane.removeItem (/app.asar/src/pane.js:583:16)
    at Pane.module.exports.Pane.destroyItem (/app.asar/src/pane.js:658:16)
    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

Non-Core Packages

autocomplete-clang 0.10.0 
autocomplete-python 1.8.43 
build 0.67.0 
busy 0.7.0 
language-docker 1.1.7 
language-gradle 0.0.3 
language-ini 1.17.0 
language-plantuml 0.2.0 
linter 1.11.21 
linter-docker 0.1.4 
linter-gcc 0.7.1 
plantuml-viewer 0.7.1 
platformio-ide 1.7.2 
platformio-ide-terminal 2.2.2 
tool-bar 1.0.1