title: Angular 6: npm ERR! cb() never called when installing angular cdk
body: <p>I am installing angular material  here is what I have done</p>
  
  <p>Angular material successfull installed by the following command </p>
  
  <pre><code>   1.npm install --save @angular/material 
  </code></pre>
  
  <p>Angula CDK fail to install by using the following command  </p>
  
  <pre><code>  1.npm install --save @angular/cdk
  </code></pre>
  
  <p>I get the following error  in cmd:</p>
  
  <pre><code>npm WARN tar zlib error: unexpected end of file
  npm ERR! cb() never called!
  
  npm ERR! This is an error with npm itself. Please report this error at:
  npm ERR!     &lt;https://github.com/npm/npm/issues&gt;
  
  npm ERR! A complete log of this run can be found in:
  npm ERR!     C:\Users\Bonge\AppData\Roaming\npm-cache\_logs\2018-07-25T17_44_24_771Z-debug.log
  </code></pre>
  
  <p>Fo reference I never had this problem, this happend after I uninstalled the cdk and angular material so now I am trying to install it again , </p>
  
  <p>what do I need to do to solve this problem?</p>