title: React-Native Bundle Error error SHA-1 for file is not computed
body: <p>I am facing this error while creating bundle of react-native app.</p>
  
  <p>I am executing command <strong>react-native bundle --dev false --entry-file index.js --bundle-output ios/main.jsbundle --platform ios</strong></p>
  
  <pre><code>error SHA-1 for file /usr/local/lib/node_modules/react-native/node_modules/metro/src/lib/polyfills/require.js (/usr/local/lib/node_modules/react-native/node_modules/metro/src/lib/polyfills/require.js) is not computed. Run CLI with --verbose flag for more details.
  ReferenceError: SHA-1 for file /usr/local/lib/node_modules/react-native/node_modules/metro/src/lib/polyfills/require.js (/usr/local/lib/node_modules/react-native/node_modules/metro/src/lib/polyfills/require.js) is not computed
      at DependencyGraph.getSha1 (/usr/local/lib/node_modules/react-native/node_modules/metro/src/node-haste/DependencyGraph.js:258:13)
      at /usr/local/lib/node_modules/react-native/node_modules/metro/src/DeltaBundler/Transformer.js:211:26
      at Generator.next (&lt;anonymous&gt;)
      at asyncGeneratorStep (/usr/local/lib/node_modules/react-native/node_modules/metro/src/DeltaBundler/Transformer.js:46:24)
      at _next (/usr/local/lib/node_modules/react-native/node_modules/metro/src/DeltaBundler/Transformer.js:66:9)
      at /usr/local/lib/node_modules/react-native/node_modules/metro/src/DeltaBundler/Transformer.js:71:7
      at new Promise (&lt;anonymous&gt;)
      at /usr/local/lib/node_modules/react-native/node_modules/metro/src/DeltaBundler/Transformer.js:63:12
      at Transformer.transformFile (/usr/local/lib/node_modules/react-native/node_modules/metro/src/DeltaBundler/Transformer.js:236:7)
      at /usr/local/lib/node_modules/react-native/node_modules/metro/src/Bundler.js:87:34
  </code></pre>
  
  <p><strong>react-native info</strong> command output</p>
  
  <pre><code>info Fetching system and libraries information...
  System:
      OS: macOS Mojave 10.14.3
      CPU: (4) x64 Intel(R) Core(TM) i5-7360U CPU @ 2.30GHz
      Memory: 1.73 GB / 8.00 GB
      Shell: 3.2.57 - /bin/bash
    Binaries:
      Node: 10.16.0 - /usr/local/bin/node
      Yarn: 1.19.1 - /usr/local/bin/yarn
      npm: 6.13.4 - /usr/local/bin/npm
      Watchman: 4.9.0 - /usr/local/bin/watchman
    SDKs:
      iOS SDK:
        Platforms: iOS 12.2, macOS 10.14, tvOS 12.2, watchOS 5.2
      Android SDK:
        API Levels: 23, 25, 26, 27, 28, 29
        Build Tools: 27.0.3, 28.0.3
        System Images: android-29 | Google Play Intel x86 Atom
        Android NDK: 20.1.5948944
    IDEs:
      Android Studio: 3.4 AI-183.6156.11.34.5522156
      Xcode: 10.2.1/10E1001 - /usr/bin/xcodebuild
    npmPackages:
      react: 16.9.0 =&gt; 16.9.0 
      react-native: 0.61.5 =&gt; 0.61.5 
    npmGlobalPackages:
      create-react-native-app: 2.0.2
      react-native-cli: 2.0.1
      react-native: 0.61.5
  </code></pre>