yarn-error.log

Arguments: 
  /usr/local/bin/node /usr/local/bin/yarn

PATH: 
  ./bin:./node_modules/.bin:/usr/local/opt/go/libexec/bin:/Users/dickeyxxx/bin:/usr/local/bin:/usr/local/sbin:./bin:./node_modules/.bin:/usr/local/opt/go/libexec/bin:/Users/dickeyxxx/bin:/usr/local/bin:/usr/local/sbin:./bin:./node_modules/.bin:/usr/local/opt/go/libexec/bin:/Users/dickeyxxx/bin:/usr/local/bin:/usr/local/sbin:/usr/local/bin:/Users/dickeyxxx/.config/yarn/global/node_modules/.bin:/Users/dickeyxxx/.cargo/bin:/usr/local/bin:/Users/dickeyxxx/.config/yarn/global/node_modules/.bin:/Users/dickeyxxx/.cargo/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/MacGPG2/bin:/usr/local/bin:/Users/dickeyxxx/.config/yarn/global/node_modules/.bin:/Users/dickeyxxx/.cargo/bin

Yarn version: 
  0.27.5

Node version: 
  8.1.3

Platform: 
  darwin x64

npm manifest: 
  {
    "dependencies": {
      "heroku-debug-latest": "file:./test/heroku-debug/4.0.0"
    }
  }

yarn manifest: 
  No manifest

Lockfile: 
  No lockfile

Trace: 
  TypeError: Cannot read property 'split' of undefined
      at /usr/local/Cellar/yarn/0.27.5/libexec/lib/yarn-cli.js:20996:48
      at Generator.next (<anonymous>)
      at step (/usr/local/Cellar/yarn/0.27.5/libexec/lib/yarn-cli.js:91:30)
      at /usr/local/Cellar/yarn/0.27.5/libexec/lib/yarn-cli.js:109:14
      at Promise (<anonymous>)
      at F (/usr/local/Cellar/yarn/0.27.5/libexec/lib/yarn-cli.js:29306:28)
      at /usr/local/Cellar/yarn/0.27.5/libexec/lib/yarn-cli.js:88:12
      at Install.pruneOfflineMirror (/usr/local/Cellar/yarn/0.27.5/libexec/lib/yarn-cli.js:21012:7)
      at /usr/local/Cellar/yarn/0.27.5/libexec/lib/yarn-cli.js:21038:22
      at Generator.next (<anonymous>)