Uncaught TypeError: Cannot read property 'file' of undefined

[dukesphere]

[Enter steps to reproduce:]

1. ...
2. ...

Atom: 1.54.0 x64
Electron: 6.1.12
OS: Mac OS X 10.14.6
Thrown From: git-tools package 0.5.0

Stack Trace

Uncaught TypeError: Cannot read property 'file' of undefined

At /Users/sduke/.atom/packages/git-tools/lib/git-tools.coffee:43

TypeError: Cannot read property 'file' of undefined
    at Object.file (/packages/git-tools/lib/git-tools.coffee:43:5)
    at Object.git_k_cf (/packages/git-tools/lib/git-tools.coffee:88:13)
    at /packages/git-tools/lib/git-tools.coffee:19:42)
    at CommandRegistry.handleCommandEvent (/Applications/Atom.app/Contents/Resources/app/static/<embedded>:11:350382)
    at CommandRegistry.dispatch (/Applications/Atom.app/Contents/Resources/app/static/<embedded>:11:348857)
    at AtomEnvironment.dispatchApplicationMenuCommand (/Applications/Atom.app/Contents/Resources/app/static/<embedded>:1:727563)
    at EventEmitter.t (/Applications/Atom.app/Contents/Resources/app/static/<embedded>:1:735513)
    at EventEmitter.emit (events.js:200:13)
    at Object.onMessage (/Applications/Atom.app/Contents/Resources/electron.asar/renderer/init.js:42:16)

Commands

     -5:44 git-diff:move-to-next-diff (input.hidden-input)
     -5:27.9.0 git-plus:commit (input.hidden-input)
  2x -5:23.2.0 core:save (input.hidden-input)
     -5:03.8.0 git-plus:commit (input.hidden-input)
  2x -4:53.6.0 core:save (input.hidden-input)
     -4:47.5.0 git-status:toggle (input.hidden-input)
     -4:05.2.0 git-tools:git-gui (input.hidden-input)
     -3:58.3.0 git-tools:gitk (input.hidden-input)
     -3:49.6.0 github:toggle-git-tab (input.hidden-input)
     -3:37.5.0 core:backspace (input.hidden-input)
     -2:57.4.0 core:save (input.hidden-input)
  4x -1:50 core:backspace (input.hidden-input)
     -1:16.5.0 git-tools:git-gui (ul.list-inline.tab-bar.inset-panel)
     -0:22.4.0 git-tools:git-gui-blame (div.github-StagingView.unstaged-changes-focused)
     -0:15.1.0 git-tools:gitk (div.github-StagingView.unstaged-changes-focused)
     -0:04.3.0 git-tools:gitk-current-file (div.github-StagingView.unstaged-changes-focused)

Non-Core Packages

asciidoc-assistant 0.2.3 
asciidoc-image-helper 1.0.1 
asciidoc-preview 2.13.1 
asciidoc-reference-check 0.3.1 
autocomplete-asciidoc 0.1.2 
command-executor 1.4.3 
git-plus 8.7.1 
git-status 0.3.4 
git-time-machine 2.1.0 
git-tools 0.5.0 
language-asciidoc 1.11.0 
line-commands 0.3.0