title: GC overhead limit exceeded when enable R8 Shrinker in Android Studio
body: <p>I'm using Android Studio 3.4 (Canary 9), when I build my app, it failed with the following error</p>
  
  <blockquote>
    <p>Task :app:transformClassesAndResourcesWithR8ForDebug </p>
    
    <p>R8 is an
    experimental feature. If you experience any issues, please file a bug
    at <a href="https://issuetracker.google.com" rel="noreferrer">https://issuetracker.google.com</a>, using 'Shrinker (R8)' as component
    name. You can disable R8 by updating gradle.properties with
    'android.enableR8=false'.</p>
    
    <p>AGPBI: {"kind":"warning","text":"Missing class:
    java.lang.instrument.ClassFileTransformer","sources":[{}],"tool":"D8"}</p>
    
    <p>Task :app:transformClassesAndResourcesWithR8ForDebug FAILED</p>
    
    <p>FAILURE: Build failed with an exception.</p>
    
    <ul>
    <li>What went wrong: Execution failed for task ':app:transformClassesAndResourcesWithR8ForDebug'.</li>
    </ul>
    
    <p>GC overhead limit exceeded</p>
  </blockquote>
  
  <p>When I disable R8 by putting <code>android.enableR8=false</code> into <strong>gradle.properties</strong>. Everything is working fine.</p>
  
  <p>So how can I fix this error without disable R8 Shrinker? Because I'm really want to test functionality of R8.</p>