title: error: bundling failed: ReferenceError: SHA-1 for file index.js
body: <p>react-native: 0.57.0
  yarn : 1.9.4
  nodejs: 9.10.1</p>
  
  <p>react-native run-android give me this error:</p>
  
  <pre><code>[android, dev] ..\..\../index.js ░░░░░░░░░░░░░░░░ 0.0% (0/1)::ffff:127.0.0.1 - - [14/Sep/2018:07:12:00 +0000] "GET /index.delta?platform=android&amp;dev=true&amp;minify=false HTTP/1.1" 500 - "-" "okhttp/3.10.0"
  error: bundling failed: ReferenceError: SHA-1 for file c:\wamp64\www\React\hello1\index.js is not computed
      at DependencyGraph.getSha1 (c:\wamp64\www\React\hello1\node_modules\metro\src\node-haste\DependencyGraph.js:238:119)
      at c:\wamp64\www\React\hello1\node_modules\metro\src\Bundler.js:168:56
      at Generator.next (&lt;anonymous&gt;)
      at step (c:\wamp64\www\React\hello1\node_modules\metro\src\Bundler.js:11:657)
      at c:\wamp64\www\React\hello1\node_modules\metro\src\Bundler.js:11:817
      at &lt;anonymous&gt;
      at process._tickCallback (internal/process/next_tick.js:118:7)
  </code></pre>