Uncaught TypeError: Cannot read property 'getGrammar' of undefined

[xmucbf]

[Enter steps to reproduce below:]

1. ...
2. ...

Atom Version: 1.8.0
System: Mac OS X 10.11.3
Thrown From: atom-format-lua package, v0.1.1

Stack Trace

Uncaught TypeError: Cannot read property 'getGrammar' of undefined

At /Users/cbf/.atom/packages/atom-format-lua/lib/atom-format-lua.js:33

TypeError: Cannot read property 'getGrammar' of undefined
    at format (/Users/cbf/.atom/packages/atom-format-lua/lib/atom-format-lua.js:33:15)
    at atom-workspace.atomFormatLuaFormat (/Users/cbf/.atom/packages/atom-format-lua/lib/atom-format-lua.js:14:13)
    at CommandRegistry.module.exports.CommandRegistry.handleCommandEvent (/Users/cbf/Documents/Atom.app/Contents/Resources/app.asar/src/command-registry.js:260:29)
    at CommandRegistry.handleCommandEvent (/Users/cbf/Documents/Atom.app/Contents/Resources/app.asar/src/command-registry.js:3:61)
    at CommandRegistry.module.exports.CommandRegistry.dispatch (/Users/cbf/Documents/Atom.app/Contents/Resources/app.asar/src/command-registry.js:160:19)
    at AtomEnvironment.module.exports.AtomEnvironment.dispatchApplicationMenuCommand (/Users/cbf/Documents/Atom.app/Contents/Resources/app.asar/src/atom-environment.js:1100:28)
    at EventEmitter.outerCallback (/Users/cbf/Documents/Atom.app/Contents/Resources/app.asar/src/application-delegate.js:327:25)
    at emitTwo (events.js:87:13)
    at EventEmitter.emit (events.js:172:7)

Commands

     -9:58.5.0 core:confirm (atom-text-editor.editor.mini.is-focused)
  3x -3:12.5.0 atom-format-lua:format (div.panels)

Config

{}

Installed Packages

# User
atom-format-lua, v0.1.1
language-lua, v0.9.4

# Dev
No dev packages