title: Cannot read property '1' of null - Angular 6 Update
body: <p>I keep getting this error when trying to upgrade by Angular 5 project to Angular 6 when running <code>ng update @angular/cli</code>:</p>
  
  <pre><code>Error: Cannot read property '1' of null
  Cannot read property '1' of null
  </code></pre>
  
  <p>I'm following the <a href="https://update.angular.io/" rel="nofollow noreferrer">update guide</a> exactly, but not sure why this is happening. Has anyone come across this?</p>