Recess not flagging error?

gistfile1.txt

Node configuration:
[email protected] /usr/local/lib/node_modules/recess
├── [email protected]
├── [email protected]
├── [email protected]
└── [email protected] ([email protected])

css/fat.css:
#js-Test {
    width: 0px;
}

div,
#div:hover {
  position: absolute;
}


Node script:
var recess = require('recess')
recess('css/fat.css', { compile: true }, function (err, obj) {
  if (err) throw err
  console.log(
    obj // recess instance for fat.css
  , obj.output // array of loggable content
  , obj.errors // array of failed lint rules
  )
})

Output:
{ path: 'css/fat.css',
  output: [ '#js-Test {\n  width: 0;\n}\n\ndiv,\n#div:hover {\n  position: absolute;\n}' ],
  errors: [],
  options: 
   { compile: true,
     compress: false,
     config: false,
     noIDs: true,
     noJSPrefix: true,
     noOverqualifying: true,
     noUnderscores: true,
     noUniversalSelectors: true,
     prefixWhitespace: true,
     strictPropertyOrder: true,
     stripColors: false,
     zeroUnits: true },
  callback: [Function: recess],
  data: '#js-Test {\n    width: 0px;\n}\n\ndiv,\n#div:hover {\n  position: absolute;\n}\n\n',
  definitions: 
   [ { selectors: [Object],
       rules: [Object],
       _lookups: {},
       strictImports: undefined },
     { selectors: [Object],
       rules: [Object],
       _lookups: {},
       strictImports: undefined } ] } [ '#js-Test {\n  width: 0;\n}\n\ndiv,\n#div:hover {\n  position: absolute;\n}' ] []