Uncaught TypeError: Cannot read property 'id' of undefined

1. Scroll or click in editor while using SplitDiff

Atom: 1.19.1 x64 Electron: 1.6.9 OS: Mac OS X 10.12.6 Thrown From: Atom Core

Stack Trace

Uncaught TypeError: Cannot read property ‘id’ of undefined

At /Applications/Atom.app/Contents/Resources/app/src/text-editor-component.js:2201

TypeError: Cannot read property 'id' of undefined
    at horizontalPositionsToMeasure.forEach (/Applications/Atom.app/Contents/Resources/app/src/text-editor-component.js:2201:73)
    at Map.forEach (native)
    at TextEditorComponent.measureHorizontalPositions (/Applications/Atom.app/Contents/Resources/app/src/text-editor-component.js:2197:45)
    at TextEditorComponent.measureContentDuringUpdateSync (/Applications/Atom.app/Contents/Resources/app/src/text-editor-component.js:384:16)
    at TextEditorComponent.updateSync (/Applications/Atom.app/Contents/Resources/app/src/text-editor-component.js:276:18)
    at TextEditorComponent.didMouseWheel (/Applications/Atom.app/Contents/Resources/app/src/text-editor-component.js:1516:43)

Commands

     -8:44.4.0 split-diff:toggle (input.hidden-input)
     -8:22.5.0 split-diff:ignore-whitespace (input.hidden-input)
  2x -8:12.1.0 core:copy (input.hidden-input)
     -7:01.8.0 split-diff:prev-diff (atom-workspace.workspace.scrollbars-visible-when-scrolling.theme-atom-material-syntax-dark.theme-atom-material-ui)
     -7:00.2.0 split-diff:next-diff (atom-workspace.workspace.scrollbars-visible-when-scrolling.theme-atom-material-syntax-dark.theme-atom-material-ui)
     -6:58.4.0 split-diff:prev-diff (atom-workspace.workspace.scrollbars-visible-when-scrolling.theme-atom-material-syntax-dark.theme-atom-material-ui)

Non-Core Packages

atom-html-preview 0.1.22 
atom-material-syntax-dark 1.0.0 
atom-material-ui 2.0.4 
atom-text-transformer 0.7.0 
autocomplete-swift 1.0.3 
drag-drop-text 0.1.4 
hex-editor 0.1.1 
highlight-selected 0.13.1 
language-applescript 0.3.0 
language-log 1.8.0 
language-markdown 0.25.1 
language-scala 1.1.9 
language-swift 0.5.0 
markdown-preview-plus 2.4.10 
markdown-writer 2.6.5 
minimap 4.29.6 
minimap-highlight-selected 4.6.1 
sort-lines 0.14.0 
split-diff 1.4.3 
Sublime-Style-Column-Selection 1.7.4 
transform 0.4.0 

[mupchrch]

Ok this is a weird one. I found a specific way to reproduce it like 50% of the time. Documenting it here so I won’t forget.

1. In the split-diff git repo, have “split-diff.coffee” file open and visible.
2. Also have “README.md” open in another tab but not visible.
3. Right click “README.md” tab and choose “Diff with Active File”.
4. Half of the time you will see the reported error.

[mupchrch]

Thanks!