Uncaught TypeError: Cannot read property 'toInt$0' of null

[awhitford]

This occurs upon bootup of Atom.

Atom: 1.42.0 x64
Electron: 4.2.7
OS: MacOS Catalina Version 10.15.2 (19C57)
Thrown From: dart package 1.0.1

Stack Trace

Uncaught TypeError: Cannot read property 'toInt$0' of null

At /Users/anthony/.atom/packages/dart/web/entry.dart.js:87357

TypeError: Cannot read property 'toInt$0' of null
    at /packages/dart/web/entry.dart.js:87357:40)
    at /packages/dart/web/entry.dart.js:53211:16)
    at Object.Primitives_applyFunctionWithPositionalArguments (/packages/dart/web/entry.dart.js:32142:28)
    at dart._callDartFunction (/packages/dart/web/entry.dart.js:49710:14)
    at /packages/dart/web/entry.dart.js:50012:20
    at n (/Applications/Atom.app/Contents/Resources/app/static/<embedded>:14:1125002)
    at e.bufferStream (/Applications/Atom.app/Contents/Resources/app/static/<embedded>:14:1125090)
    at Socket.e.on (/Applications/Atom.app/Contents/Resources/app/static/<embedded>:14:1123758)
    at Socket.emit (events.js:187:15)
    at Pipe._handle.close (net.js:606:12)

Commands

Non-Core Packages

atom-ide-ui 0.13.0 
atom-toolbar 0.1.6 
atom-yamljson 0.2.4 
busy-signal 2.0.1 
dart 1.0.1 
ide-json 0.2.1 
ide-yaml 0.5.1 
intentions 1.1.5 
linter 2.3.1 
linter-eslint 8.5.5 
linter-ui-default 1.8.0 
pretty-json 2.1.2