title: Unable to run gulp task
body: <p>I'm trying to run a simple <code>gulp-sass</code> task, but I'm getting this error: </p>
  
  <pre><code>[22:42:14] Starting 'sass'...
  [22:42:14] Finished 'sass' after 10 ms
  
   events.js:72
      throw er; // Unhandled 'error' event
            ^
     Error: File not found with singular glob
  at Glob.&lt;anonymous&gt; (D:\Development\WebStorm\calliope\node_modules\gulp\node_modules\vinyl-fs\node_modules\glob-stream\index.js:34:30)
  at Glob.EventEmitter.emit (events.js:95:17)
  at Glob._finish (D:\Development\WebStorm\calliope\node_modules\gulp\node_modules\vinyl-fs\node_modules\glob-stream\node_modules\glob\glob.js:171:8)
  at done (D:\Development\WebStorm\calliope\node_modules\gulp\node_modules\vinyl-fs\node_modules\glob-stream\node_modules\glob\glob.js:158:12)
  at Glob._processSimple2 (D:\Development\WebStorm\calliope\node_modules\gulp\node_modules\vinyl-fs\node_modules\glob-stream\node_modules\glob\glob.js:640:12)
  at D:\Development\WebStorm\calliope\node_modules\gulp\node_modules\vinyl-fs\node_modules\glob-stream\node_modules\glob\glob.js:628:10
  at Glob._stat2 (D:\Development\WebStorm\calliope\node_modules\gulp\node_modules\vinyl-fs\node_modules\glob-stream\node_modules\glob\glob.js:724:12)
  at lstatcb_ (D:\Development\WebStorm\calliope\node_modules\gulp\node_modules\vinyl-fs\node_modules\glob-stream\node_modules\glob\glob.js:716:12)
  at RES (D:\Development\WebStorm\calliope\node_modules\gulp\node_modules\vinyl-fs\node_modules\glob-stream\node_modules\glob\node_modules\inflight\inflight.js:23:14)
  at f (D:\Development\WebStorm\calliope\node_modules\gulp\node_modules\vinyl-fs\node_modules\glob-stream\node_modules\glob\node_modules\once\once.js:17:25)
  </code></pre>
  
  <p>I Installed <code>gulp</code> both globally and locally as dev depency. 
  Here's my task: </p>
  
  <pre><code>var gulp = require("gulp"),
  sass = require("gulp-sass");
  
  gulp.task("sass", function(){
      gulp.src('assets/sass/*.scss')
          .pipe(sass())
          .pipe(gulp.dest('assets/css'))
  });
  </code></pre>