Uncaught TypeError: Cannot read property 'indexOf' of undefined

[Enter steps to reproduce:]

1. Start an untitled file
2. Change the language to Python
3. Add a basic `print("hello, world!")` statement
4. Try to run the file

**Atom**: 1.18.0 ia32
**Electron**: 1.3.15
**OS**: Microsoft Windows 10 Pro
**Thrown From**: [script](https://github.com/rgbkrk/atom-script) package 3.15.0

### Stack Trace

Uncaught TypeError: Cannot read property 'indexOf' of undefined

```
At C:\Users\Scott\.atom\packages\script\lib\runner.js:166

TypeError: Cannot read property 'indexOf' of undefined
at Runner.getProjectPath (/packages/script/lib/runner.js:166:19)
at Runner.getCwd (/packages/script/lib/runner.js:79:22)
at Runner.options (/packages/script/lib/runner.js:130:17)
at Runner.run (/packages/script/lib/runner.js:27:26)
at Runtime.execute (/packages/script/lib/runtime.js:78:17)
at /packages/script/lib/script.js:98:40)
at CommandRegistry.module.exports.CommandRegistry.handleCommandEvent (~/AppData/Local/atom/app-1.18.0/resources/app/src/command-registry.js:265:35)
at ~/AppData/Local/atom/app-1.18.0/resources/app/src/command-registry.js:3:65
at KeymapManager.module.exports.KeymapManager.dispatchCommandEvent (~/AppData/Local/atom/app-1.18.0/resources/app/node_modules/atom-keymap/lib/keymap-manager.js:610:22)
at KeymapManager.module.exports.KeymapManager.handleKeyboardEvent (~/AppData/Local/atom/app-1.18.0/resources/app/node_modules/atom-keymap/lib/keymap-manager.js:401:28)
at WindowEventHandler.module.exports.WindowEventHandler.handleDocumentKeyEvent (~/AppData/Local/atom/app-1.18.0/resources/app/src/window-event-handler.js:100:42)
at HTMLDocument. (~/AppData/Local/atom/app-1.18.0/resources/app/src/window-event-handler.js:3:65)
```

### Commands

```
-0:48.9.0 snippets:next-tab-stop (input.hidden-input)
-0:48.9.0 snippets:expand (input.hidden-input)
-0:48.9.0 editor:indent (input.hidden-input)
-0:46.2.0 command-palette:toggle (input.hidden-input)
-0:42.8.0 editor:consolidate-selections (input.hidden-input)
-0:42.8.0 core:cancel (input.hidden-input)
-0:40.9.0 line-ending-selector:show (atom-text-editor.editor.autocomplete-active.is-focused)
-0:39.7.0 core:confirm (input.hidden-input)
-0:37.7.0 grammar-selector:show (atom-text-editor.editor.is-focused)
-0:36.5.0 core:confirm (input.hidden-input)
3x -0:31.7.0 core:backspace (input.hidden-input)
3x -0:28.1.0 core:move-right (input.hidden-input)
2x -0:24.2.0 editor:newline (input.hidden-input)
-0:23.6.0 core:backspace (input.hidden-input)
4x -0:17.8.0 intentions:highlight (input.hidden-input)
-0:15.5.0 script:run (input.hidden-input)
```

### Non-Core Packages

```
activate-power-mode 2.0.0
atom-clock 0.1.9
build 0.68.0
busy 0.7.0
busy-signal 1.4.3
chester-atom-syntax 0.2.0
close-tags 0.6.0
django-atom 0.2.4
file-icons 2.1.7
git-time-machine 1.5.9
highlight-selected 0.13.1
improved-chester-atom-syntax 0.3.0
intentions 1.1.2
linter 2.2.0
linter-pylama 0.9.3
linter-ui-default 1.6.1
minimap 4.28.2
minimap-autohide 0.10.1
minimap-autohider 1.5.3
minimap-bookmarks 0.4.2
minimap-codeglance 0.4.7
minimap-cursorline 0.2.0
minimap-find-and-replace 4.5.2
minimap-git-diff 4.3.1
minimap-highlight-selected 4.6.1
minimap-selection 4.4.0
minimap-split-diff 0.3.7
minimap-titles 1.11.0
python-indent 1.0.3
script 3.15.0
split-diff 1.4.1
```