Is this a bug report?

yes

Environment

react-native-cli: 2.0.1
react-native: 0.46.3
node: v8.1.0

Target Platform: iOS

Steps to Reproduce

Build iOS app for release, and try to run it on the actual iOS device.

The app will crash with error:

Error reading bundle /var/containers/Bundle/Application/62A1S7F9-6795-4S7E-93B3-A2F17FC5BFCF/MyApp.app/main.jsbundle

On the simulator, the app runs fine.
After downgrading to 0.45.1 everything worked on the device as well again.