Uncaught TypeError: Cannot read property 'NaN' of undefined.

Tried to edit a stylsheet and got `Uncaught TypeError: Cannot read property 'NaN' of undefined`. Seems to be ever since I upgraded my OS to High Seirra version 10.13. Pigments now causes the stylesheets to be unresponsive.

**Atom**: 1.20.1 x64
**Electron**: 1.6.9
**OS**: Mac OS X 10.13
**Thrown From**: [pigments](https://github.com/abe33/atom-pigments) package 0.40.2

### Stack Trace

Uncaught TypeError: Cannot read property 'NaN' of undefined

```
At /Applications/Atom.app/Contents/Resources/app/src/text-editor-component.js:958

TypeError: Cannot read property 'NaN' of undefined
at TextEditorComponent.renderedScreenLineForRow (/Applications/Atom.app/Contents/Resources/app/src/text-editor-component.js:958:37)
at TextEditorComponent.pixelLeftForRowAndColumn (/Applications/Atom.app/Contents/Resources/app/src/text-editor-component.js:2364:35)
at TextEditorComponent.pixelPositionForScreenPosition (/Applications/Atom.app/Contents/Resources/app/src/text-editor-component.js:204:46)
at HTMLElement.pixelPositionForScreenPosition (/Applications/Atom.app/Contents/Resources/app/src/text-editor-element.js:243:32)
at /packages/pigments/lib/color-buffer-element.coffee:327:36)
at HTMLElement.ColorBufferElement.updateDotDecorationsOffsets (/packages/pigments/lib/color-buffer-element.coffee:319:7)
at /packages/pigments/lib/color-buffer-element.coffee:250:14
at Array.forEach (native)
at /packages/pigments/lib/color-buffer-element.coffee:249:20
at Function.module.exports.Emitter.simpleDispatch (/Applications/Atom.app/Contents/Resources/app/node_modules/event-kit/lib/emitter.js:25:20)
at Emitter.module.exports.Emitter.emit (/Applications/Atom.app/Contents/Resources/app/node_modules/event-kit/lib/emitter.js:141:34)
at /Applications/Atom.app/Contents/Resources/app/src/text-editor.js:626:38
at Function.module.exports.Emitter.simpleDispatch (/Applications/Atom.app/Contents/Resources/app/node_modules/event-kit/lib/emitter.js:25:20)
at Emitter.module.exports.Emitter.emit (/Applications/Atom.app/Contents/Resources/app/node_modules/event-kit/lib/emitter.js:141:34)
at DisplayLayer.emitDidChangeSyncEvent (/Applications/Atom.app/Contents/Resources/app/node_modules/text-buffer/lib/display-layer.js:823:24)
at /Applications/Atom.app/Contents/Resources/app/node_modules/text-buffer/lib/text-buffer.js:757:35
at Map.forEach (native)
at TextBuffer.module.exports.TextBuffer.emitDidChangeEvent (/Applications/Atom.app/Contents/Resources/app/node_modules/text-buffer/lib/text-buffer.js:756:47)
at TextBuffer.module.exports.TextBuffer.applyChange (/Applications/Atom.app/Contents/Resources/app/node_modules/text-buffer/lib/text-buffer.js:739:18)
at TextBuffer.module.exports.TextBuffer.revertToCheckpoint (/Applications/Atom.app/Contents/Resources/app/node_modules/text-buffer/lib/text-buffer.js:946:22)
at TextBuffer.module.exports.TextBuffer.transact (/Applications/Atom.app/Contents/Resources/app/node_modules/text-buffer/lib/text-buffer.js:897:20)
at TextEditor.module.exports.TextEditor.transact (/Applications/Atom.app/Contents/Resources/app/src/text-editor.js:1673:32)
at /Applications/Atom.app/Contents/Resources/app/src/text-editor.js:1234:30
at TextEditor.module.exports.TextEditor.mergeSelections (/Applications/Atom.app/Contents/Resources/app/src/text-editor.js:2617:49)
at TextEditor.module.exports.TextEditor.mergeIntersectingSelections (/Applications/Atom.app/Contents/Resources/app/src/text-editor.js:2583:41)
at TextEditor.module.exports.TextEditor.mutateSelectedText (/Applications/Atom.app/Contents/Resources/app/src/text-editor.js:1232:25)
at TextEditor.module.exports.TextEditor.insertText (/Applications/Atom.app/Contents/Resources/app/src/text-editor.js:1198:25)
at TextEditor.object.(anonymous function) [as insertText] (/Applications/Atom.app/Contents/Resources/app/node_modules/underscore-plus/lib/underscore-plus.js:77:33)
at TextEditorComponent.didTextInput (/Applications/Atom.app/Contents/Resources/app/src/text-editor-component.js:1651:28)
```

### Commands

```
```

### Non-Core Packages

```
atom-beautify 0.30.5
atom-bootstrap4 1.4.0
atom-css-comb 3.3.1
atom-material-syntax-dark 1.0.0
atom-material-ui 2.0.4
autoprefixer 3.7.1
busy 0.7.0
emmet 2.4.3
file-icons 2.1.12
language-gitignore 0.3.0
minimap 4.29.7
php-cs-fixer 4.1.1
pigments 0.40.2
tree-view-git-status 1.4.0
w3c-validation 0.4.0
```