iOS release build stops work after upgrading from 0.39.2 to 0.42.0

[lucianomlima]

Description

After upgrade from 0.39.2 to 0.42.0 I can't run release build in iOS through CLI or in Xcode.
Doesn't generate errors or warnings. Build is succeed but app freezes on splash screen. On 0.39.2 works fine.

Reproduction

react-native run-ios --configuration Release or change scheme to Release on Xcode.

Additional Information

• React Native version: 0.42.0
• React version: 15.4.2
• Platform: iOS 9.x and 10.x
• Operating System: MacOS Sierra with Xcode 8.2.1

My AppDelegate.m

  NSURL *jsCodeLocation;

  #ifdef DEBUG
    NSLog(@"Debug");
    jsCodeLocation = [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"index.ios" fallbackResource:nil];
  #else
    NSLog(@"Production");
    jsCodeLocation = [[NSBundle mainBundle] URLForResource:@"main" withExtension:@"jsbundle"];
  #endif

  NSLog(@"=========> jsCodeLocation: %@", [jsCodeLocation absoluteURL]);

I try to generate bundle with react-native bundle --platform ios --dev false --entry-file index.ios.js --bundle-output ios/main.jsbundle --assets-dest ./ios/main.jsbundle but not works.

On debug build, works fine and jsCodeLocation is http://localhost:8081/index.ios.bundle?platform=ios&dev=true&minify=false

On production build jsCodeLocation is file:///Users/lucianolima/Library/Developer/CoreSimulator/Devices/124E4686-6239-4A51-9A69-84942077CE9A/data/Containers/Bundle/Application/C3829A0A-511C-4203-9DA2-59C81948ABFB/carnaval24h.app/main.jsbundle

Again, this works before upgrading to 0.42.0.

Xcode log

objc[434]: Class PLBuildVersion is implemented in both /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/System/Library/PrivateFrameworks/AssetsLibraryServices.framework/AssetsLibraryServices (0x120c52998) and /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/System/Library/PrivateFrameworks/PhotoLibraryServices.framework/PhotoLibraryServices (0x120a74880). One of the two will be used. Which one is undefined.
2017-03-10 12:30:33.137 carnaval24h[434:20256331] initialize
2017-03-10 12:30:33.283 carnaval24h[434:20256331] Production
2017-03-10 12:30:33.284 carnaval24h[434:20256331] =========> jsCodeLocation: file:///Users/lucianolima/Library/Developer/CoreSimulator/Devices/124E4686-6239-4A51-9A69-84942077CE9A/data/Containers/Bundle/Application/C3829A0A-511C-4203-9DA2-59C81948ABFB/carnaval24h.app/main.jsbundle
2017-03-10 12:30:33.325 carnaval24h[434:20256331] [Crashlytics] Version 3.8.4 (121)
2017-03-10 12:30:33.357603 carnaval24h[434:20256331] [MC] System group container for systemgroup.com.apple.configurationprofiles path is /Users/lucianolima/Library/Developer/CoreSimulator/Devices/124E4686-6239-4A51-9A69-84942077CE9A/data/Containers/Shared/SystemGroup/systemgroup.com.apple.configurationprofiles
2017-03-10 12:30:33.359910 carnaval24h[434:20256331] [MC] Reading from private effective user settings.
2017-03-10 12:30:33.420 carnaval24h[434:20256331] Falling back to loading access token from NSUserDefaults because of simulator bug
2017-03-10 12:30:33.422 carnaval24h[434:20256331] Falling back to storing access token in NSUserDefaults because of simulator bug
2017-03-10 12:30:33.429 carnaval24h[434:20256331] Falling back to loading access token from NSUserDefaults because of simulator bug
2017-03-10 12:30:33.432 carnaval24h[434:20256331] Falling back to storing access token in NSUserDefaults because of simulator bug
2017-03-10 12:30:33.439 carnaval24h[434:20256331] Falling back to loading access token from NSUserDefaults because of simulator bug
2017-03-10 12:30:33.442 carnaval24h[434:20256331] Falling back to storing access token in NSUserDefaults because of simulator bug
2017-03-10 12:30:33.579 carnaval24h[434] <Notice> [Firebase/Analytics][I-ACS023007] Firebase Analytics v.3700000 started
2017-03-10 12:30:33.581 carnaval24h[434] <Notice> [Firebase/Analytics][I-ACS023008] To enable debug logging set the following application argument: -FIRAnalyticsDebugEnabled (see http://goo.gl/RfcP7r)
2017-03-10 12:30:33.602 carnaval24h[434] <Notice> [Firebase/Analytics][I-ACS003007] Successfully created Firebase Analytics App Delegate Proxy automatically. To disable the proxy, set the flag FirebaseAppDelegateProxyEnabled to NO in the Info.plist
2017-03-10 12:30:33.858 carnaval24h[434:20256331] ERROR: Error! iOS Simulator does not support push! Please test on a real iOS device. Error: Error Domain=NSCocoaErrorDomain Code=3010 "remote notifications are not supported in the simulator" UserInfo={NSLocalizedDescription=remote notifications are not supported in the simulator}
2017-03-10 12:30:34.600 carnaval24h[434] <Notice> [Firebase/Analytics][I-ACS023012] Firebase Analytics enabled

[Naoto-Ida]

Do you happen to be using GraphQL for your data needs?
I had issues that popped up when upgrading from 0.39 to 0.42 too. See here if interested.

[lucianomlima]

Thank you @Naoto-Ida.
I'm not using GraphQL.
My problems disappeared after I generated a new clean application with React Native 0.42.0, moved all the files to the new clean version and reconfigured all JS modules.

React Native's upgrade is a trouble task yet.