title: Internal compiler error when UseDotNetNativeToolchain is true
body: <p>I have a UWP app that compiles successfully if I have <code>UseDotNetNativeToolchain</code> off.  But when I turn it on, it gives me the cryptic error:</p>
  
  <blockquote>
    <p>Internal compiler error: Object reference not set to
    an instance of an object. UWPApp  C:\Program Files
    (x86)\MSBuild\Microsoft.NetNative\x86\ilc\IlcInternals.targets   887 Build</p>
  </blockquote>
  
  <p>This is all it gives me.  What could be causing this?  How can I drill down on this.</p>
  
  <p>Using VS2015</p>
  
  <p>Here is the full build output in case that helps:</p>
  
  <p><a href="https://gist.github.com/shannah/e24fe8456313fb9ad98577c9a812f357" rel="nofollow">https://gist.github.com/shannah/e24fe8456313fb9ad98577c9a812f357</a></p>