grunt build errors.

[andrew-luhring]

I had a few errors while running grunt build so I figured I'd share my solutions in case anyone else has the same issues.

uglification:

fatal error:

WARN: Dropping unused function argument data [.tmp/concat/scripts/vendor.js:14043,47]
WARN: Dropping unused variable i [.tmp/concat/scripts/vendor.js:15396,30]
WARN: Dropping unused function argument value [.tmp/concat/scripts/vendor.js:15315,45]
WARN: Dropping side-effect-free statement [null:1,0]
[TypeError: Cannot read property 'argnames' of undefined]
[TypeError: Cannot read property 'argnames' of undefined]
>> Uglifying source ".tmp/concat/scripts/vendor.js,.tmp/concat/scripts/scripts.js" failed.
Warning: Uglification failed.
Cannot read property 'argnames' of undefined.
 Use --force to continue.

solution:

uglify: {
      dist:{
        options : {
          sourceMap: '<%= yeoman.dist %>/scripts/scripts.map.js',
          sourceMapRoot: '/',
          mangle: false,
          report: 'min',
          beautify: {
              // same options
          },
          compress: {
             // same options except comment this out:
//            unsafe        : true,            // some unsafe optimizations (see docs)

concurrency

(non-fatal) error:

>> Warning: There are more tasks than your concurrency limit. After this limit
>> is reached no further tasks will be run until the current tasks are
>> completed. You can adjust the limit in the concurrent task options

solution:

 concurrent: {
      server: [
        'copy:styles'
      ],
      test: [
        'copy:styles',
      ],
      dist: [
        'copy:styles',
        'imagemin',
        'svgmin'
      ]
       ,                     // <---- add this 
      options: {        // <---- add this 
        limit: 5          // <---- add this 
      }                     // <---- add this 
    }

source